Answers
The electron configuration of carbon atom in its ground state is 1s² 2s² 2p². After sp hybridization, one 2s electron gets excited to the 2p orbital forming four unpaired electrons ready for bonding. These form two sp hybrid orbitals, leaving the remaining two 2p orbitals with single electrons.
Explanation:The electron configuration for a carbon atom (C) in its ground state is 1s² 2s² 2p², represented by an orbital diagram with two arrows in the 1s box, two in the 2s, and two single arrows in two of the three 2p boxes, indicating paired and unpaired electrons respectively.
During sp hybridization, one of the 2s electrons gets excited and moves to the 2p orbital, leading to four unpaired electrons ready for bonding. These mix to form two sp orbitals. In the electron configuration diagram, the two sp hybrid orbitals would have a single electron each, leaving the remain two 2p orbitals also with single electrons. Remember, these are depicted as boxes, each with a single upward arrow.
The distinction between the carbon atom's electron configurations before and after sp hybridization is essential in understanding its bonding behaviour and the formation of diverse organic compounds.
Learn more about sp Hybridization here:https://brainly.com/question/30198266
#SPJ12
Related Questions
Which of the following physical properties would tell you about an element's mass per unit volume ratio? hardness boiling point crystalline shape density all of the above
Answers
A physical property that would tell you about an element's mass per unit volume ratio would be its density.
Answer: Letter C
Hope that helps! ★ If you have further questions about this question or need more help, feel free to comment below or leave me a PM. -UnicornFudge aka Nadia
Answer: Option (d) is the correct answer.
Explanation:
A physical property is a property that does not change the chemical composition of a substance.
For example, mass, density, boiling point etc are all physical properties.
It is known that density is the ratio of mass per unit volume.
Mathematically, Density = [tex]\frac{mass}{volume}[/tex]
Hence, we can conclude that out of the given options density is the physical property that would tell you about an element's mass per unit volume ratio.
If the couple moment acting on the pipe has a magnitude of 400 n-m, determine the magnitude f of the vertical force applied to each wrench.
Answers
Moment = Force * Distance
In order to determine the vertical force, we must know the distance between the two forces which is represented by the length of the pipe. Suppose the pipe is 0.5 m, then the force is
400 N·m = F*0.5 m
F = 800 N
Which hybridization scheme occurs about nitrogen when nitrogen forms a double bond?
Answers
The electronic configuration of nitrogen is
1s2 2s2 2p3
Now during formation of double bond there will be formation of a pi bond
The nitrogen will undergo sp2 hybridization. One extra p orbital will form pi bond by side ways overlapping
the two sp2 hybridized orbital will form sigma bond with two atoms
the third sp2 hybridized orbital will have one lone pair of electrons .
The hybridization around nitrogen when it forms a double bond is [tex]\boxed{s{p^2}}[/tex] .
Further explanation:
Prediction of hybridization:
The hybridization can be determined by calculating the number of hybrid orbitals (X) which is formed by the atom. The formula to calculate the number of hybrid orbitals (X) is as follows:
[tex]\boxed{{\text{X = }}\frac{1}{2}\left[ {{\text{VE}} + {\text{MA}} - c + a}\right]}[/tex]
Where,
VE is a total number of valence electrons of the central atom. MA is the total number of monovalent atoms/groups surrounding the central atom. c is the charge on the cation if the given species is a polyatomic cation. a is the charge on the anion if the given species is a polyatomic anion.
Note: In MA only monovalent species should be considered and for divalent atoms or groups MA is equal to zero.
Generally, the least electronegative atom is considered as the central atom. Calculate the hybridization as follows:
1. If the value of X is 2 then it means two hybrid orbitals are to be formed and thus the hybridization is sp.
2. If the value of X is 3 then it means three hybrid orbitals are to be formed and thus the hybridization is [tex]s{p^2}[/tex] .
3. If the value of X is 4 then it means four hybrid orbitals are to be formed and thus the hybridization is [tex]s{p^3}[/tex].
4. If the value of X is 5 then it means five hybrid orbitals are to be formed and thus the hybridization is [tex]s{p^3}d[/tex].
5. If the value of X is 6 then it means six hybrid orbitals are to be formed and thus the hybridization is [tex]s{p^3}{d^2}[/tex] .
The ground state electronic configuration for nitrogen (N) is,
[tex]1{s^2}2{s^2}2{p^3}[/tex]
Therefore, the valence electrons associated with nitrogen (N) atom are 5.
The two electrons of nitrogen are involved in the formation of the double bond and the electron present in 2s subshell will remain as the lone pair on nitrogen atom. There is only one electron left on the nitrogen atom out of five, and therefore the total number of monovalent atoms that can surrounding the central atom (MA) is 1.
Since the molecule is a neutral species and thus the value of a and c is 0.
Substitute these values in the above formula.
[tex]\begin{aligned}\text{X}&=\dfrac{1}{2}[5+1-0+0]\\&=\dfrac{1}{2}[6]\\&=\boxed{3}\end{aligned}[/tex]
Since the value of X is 3, it means 3 hybrid orbitals are to be formed and therefore the hybridization of nitrogen is [tex]{\mathbf{s}}{{\mathbf{p}}^{\mathbf{2}}}[/tex] .
Learn more:
1. Molecular shape around the central atoms in the amino acid glycine: https://brainly.com/question/4341225
2. What causes water molecules to have a bent shape? https://brainly.com/question/1979769
Answer details:
Grade: Senior School
Subject: Chemistry
Chapter: Covalent bonding and molecular structure
Keywords: hybridization, nitrogen, ground state electronic configuration, sp2, valence electrons, monovalent atoms, VE, MA, a, c, X, 5, 0, N, least electronegative, central atom.
The melting of ice cream is an example of which of the following?
Chemical change
Chemical property
Physical change
Physical property
Answers
Answer:
Answer is physical change
Explanation:
I took the test and got the answer right
No new substance is created during a physical change, and the substance's chemical makeup stays the same. Physical characteristics, such as shape and size, vary. Here the melting of ice cream is a Physical change. The correct option is C.
The physical state of ice cream has only changed from solid to liquid (a physical change), and this change only lasts until the melted ice cream begins to cool (a temporary change). This means that melting ice cream is a reversible, temporary, and physical change.
Ice dissolves by an endothermic mechanism. Ice needs some heat to melt because the warmth will cause connections to dissolve when absorbed. When a solid reaches its freezing point, its ions or molecules disintegrate, causing its molecules to become loosely packed.
Thus the correct option is C.
To know more about physical change, visit;
https://brainly.com/question/28742279
#SPJ6
For each solution below calculate the millimoles of solute.
a.1.90 l of 0.00657 m nacn
b.871 ml of a solution containing 8.49 ppm caco3
Answers
(1.62 L) x (0.00332 mol/L NaCN) = 0.00538 mol = 5.38 mmol NaCN
B
Supposing the solvent to be water, and supposing the density of the solution is near that of pure water:
(675 g) x (5.23 x 10^-6) / (100.0875 g CaCO3/mol) = 3.53 × 10^-5 mol = 0.0353 mmol CaCO3.
Evaluate the probability of finding an electron in a small region of a hydrogen 1s orbital
Answers
Then take the ratio of the probability density at r=0.55 ao and at r=0.Ψ 20.55ao,Θ, Φ( )Ψ20,Θ,Φ( )=1πao3e−2 0.55ao( )ao1πao3e−2 0( )ao=e−2 0.55ao( )aoe−2 0( )ao==e−2(0.55)1=0.3329 = 0.33
The ratio of the probability density at r = 0.55 a0 to that at r = 0 is 0.33.
See attachment for better understanding.
Empirical formula of magnesium oxide
Answers
In order to prove this you need to calculate how many moles of magnesium and how many moles of oxygen there are and how it all works together. A very common example of proving it is using 0.297 g of magnesium and getting 0.493 g of the oxide after a reaction.
Mass of Mg = 0.297
Mass of MagnesiumOxide = Mass of Mg + Mass of O
0.493 g = 0.297 g + Mass of O
Mass of O = (0.493 - 0.297)g = 0.196g
Moles of Mg = 0.297 g Mg x 1 mol Mg/24.3g Mg = 0.01222 mol Mg
Moles of O = 9.196 g O x 1 mol O/16g O = 0.01225 mol O
Now you divide both the numerator and the denominator by the smaller value and you'll see that the results is MgO
Final answer:
The empirical formula for a compound with 0.130 g of nitrogen and 0.370 g of oxygen is found by converting grams to moles, getting the simplest ratio, and ensuring whole numbers, which results in N₂O₅.
Explanation:
To determine the empirical formula of a compound from the given masses of nitrogen and oxygen, we first need to convert these masses to moles. For nitrogen, 0.130 grams divided by its molar mass (approximately 14.01 g/mol) equals approximately 0.00928 moles. For oxygen, 0.370 grams divided by its molar mass (approximately 16.00 g/mol) equals approximately 0.0231 moles. Next, we divide the number of moles of each element by the smallest number of moles to find the simplest ratio of the elements.
In this case, dividing both by 0.00928 moles, we get a ratio of about 1 mole of nitrogen to 2.5 moles of oxygen. Since we want whole numbers for the empirical formula, we multiply both by 2 to get approximately 2 moles of nitrogen for every 5 moles of oxygen, giving us N₂O₅ as the empirical formula.
The abundance of 12c is 98.9%. 13c is another naturally occurring isotope. what is the percent abundance of 13c?
Answers
Actually the total abundance of the isotopes of any element in this world must sum up to 100%. So we initially know that 12 C is 98.9 percent abundant, therefore the remaining of the 100 percent must be of 13 C, that is:
13 C = 100% - 98.9%
13 C = 1.1%
Final answer:
The percent abundance of carbon-13 (13C) is 1.1%, which is calculated by subtracting the abundance of carbon-12 (12C) from 100%.
Explanation:
The percent abundance of carbon-13 (13C) can be calculated by subtracting the abundance of carbon-12 (12C) from 100%. If carbon-12 comprises 98.9% of natural carbon, the calculation would be 100% - 98.9% = 1.1%. Therefore, the percent abundance of carbon-13 is 1.1%.
Which alkyl chloride, through primary, is essentially unreactive in sn2 reactions?
Answers
In SN2 reactions, primary alkyl chlorides are generally reactive, but steric hindrance can cause some to be less reactive. Alkyl chlorides with neighboring bulky groups can be unreactive in SN2 due to restricted access for nucleophiles. Tertiary alkyl halides are typically unreactive in SN2 reactions, preferring SN1 or E1 mechanisms.
Explanation:The student's question asks which alkyl chloride is essentially unreactive in SN2 reactions when considering primary alkyl chlorides. SN2 reactions involve a nucleophile attacking the carbon centre and displacing the leaving group, typically a halide, through a concerted mechanism with inversion of stereochemistry. This mechanism is characteristic of primary and methyl alkyl halides, with important factors being the steric accessibility of the central carbon and the strength of the leaving group.
However, among primary alkyl chlorides, alkyl chlorides with increased steric hindrance due to neighbouring substituents can be less reactive in SN2 reactions. While a standard primary alkyl chloride like ethyl chloride is typically reactive in SN2 reactions, bulkier substrates that are still considered primary may react slower or not at all. An example could be a primary alkyl chloride with adjacent bulky groups that restrict the approach of the nucleophile, leading to steric hindrance. However, without further structural information about specific alkyl chlorides, standard primary alkyl chlorides like methyl chloride or ethyl chloride do not exhibit this unreactivity in SN2 reactions.
In contrasting SN1 and SN2 mechanisms, the ease of nucleophilic attack plays a significant role. Tertiary alkyl halides are more prone to SN1 and E1 mechanisms due to their highly hindered nature which impedes nucleophilic attack, making them unsuitable for SN2 reactions. Conversely, primary alkyl halides are typically more reactive in SN2 reactions. It is important to note that in SN1 reactions, the rate-determining step is unimolecular, involving the formation of a carbocation intermediate. This intermediate is planar, allowing for nucleophilic attack on either side which can lead to a racemic mixture if the original molecule was chiral.
Neopentyl chloride, despite being a primary alkyl chloride, is unreactive in SN2 reactions due to significant steric hindrance from adjacent methyl groups. This obstructs the nucleophile's approach.
In SN2 reactions, the rate of reaction is significantly influenced by steric hindrance around the electrophilic carbon. Although primary alkyl chlorides are generally highly reactive due to minimal steric hindrance, there are exceptions. One notable exception is neopentyl chloride (1-chloro-2,2-dimethylpropane), which is essentially unreactive in SN2 reactions despite being classified as a primary alkyl chloride. This lack of reactivity is due to the significant steric hindrance created by the methyl groups attached to the adjacent carbon atoms, which obstruct the nucleophile's approach.
Key Factors Affecting SN2 Reactions:
Steric Hindrance: Increased steric hindrance around the electrophilic carbon hinders the nucleophile from attacking effectively.Alkyl Group Structure: Simple primary alkyl chlorides work well in SN2 reactions, but bulky primary structures like neopentyl chloride do not.In summary, while most primary alkyl halides are reactive in SN2 mechanisms, the presence of bulky groups adjacent to the reaction site can significantly reduce their reactivity.
The energy released during a nuclear reaction in a power plant is directly used to __________
A. create electric current
B. fuse hydrogen into helium
C. heat water
D. energize control rods
Answers
Final answer:
In a nuclear power plant, the energy released from the fission of uranium-235 is used to heat water, producing steam that drives turbines to generate electricity.
Explanation:
The energy released during a nuclear reaction in a power plant is directly used to heat water. In a nuclear power plant, a nuclear reactor uses the energy produced in the fission of uranium-235 to produce electricity. The fission reaction generates heat, which is transferred to water surrounding the fuel rods causing it to turn into steam. This steam then drives turbines connected to generators, thereby generating electric current. Control rods made out of materials like boron, cadmium, or hafnium, which absorb neutrons, are used to control the rate of the fission reaction, but they are not directly energized by the reaction.
Write a net ionic equation to show how piperidine, c5h11n, behaves as a base in water.
Answers
Nitrogen lone pair will act as a base,removing H+ from water leaving behind OH- ion.
Why ?
Because N is a better donor than O.
Final answer:
Piperidine (C5H11N) behaves as a Brønsted-Lowry base in water by accepting a proton, forming piperidinium ion (C5H12N+) and hydroxide ion (OH-). The net ionic equation for this reaction is C5H11N(aq) + H2O(l) → C5H12N+(aq) + OH-(aq).
Explanation:
To write the net ionic equation for how piperidine, a compound with the chemical formula C5H11N, behaves as a base in water, we need to show the reaction where piperidine accepts a hydrogen ion (proton) from water. Since piperidine acts as a Brønsted-Lowry base, it will accept a proton from water, which acts as a Brønsted-Lowry acid. The reaction forms piperidinium ion, C5H12N+, and hydroxide ion, OH-.
The net ionic equation for this process is:
C5H11N(aq) + H2O(l) → C5H12N+(aq) + OH-(aq)
This equation indicates that piperidine is accepting a proton from water, showing its behavior as a base in aqueous solution, while the water molecule donates a proton, thus acting as an acid.
An average copper penny minted in the 1960s contained about 3.000 g of copper. how much chalcopyrite had be mined to produce 100 pennies?
Answers
To know the answer, determine first the mass of the copper
used:
Copper used = 100 pennies x 3.0g Cu per penny = 300.0 g Cu
then, determine the pathway and molar ratio from Cu formed back to CuFeS2 required
using the balanced reactions:
1 Cu2S from 2 CuS; 2Cu from 1 Cu2S; 2CuS from 2CuFeS2
Therefore 2Cu from 2CuFeS2, they are in a one to one molar ratio.
then, convert g Cu to moles and g of CuFeS2:
= 300.0 g Cu * 1 mol Cu/63.546g Cu * 2 mol CuFeS2/2 moles Cu
= 4.72 moles CuFeS2
chalcopyrite had to be mined = 4.72 moles CuFeS2 * 183.54 g CuFeS2/1 mole
CuFeS2 = 866.49 g CuFeS2
The amount of chalcopyrite that had be mined to produce 100 pennies is [tex]\boxed{{\text{866}}{\text{.49g}}}[/tex].
Further explanation:
Stoichiometry of a reaction is used to determine the amount of species present in the reaction by the relationship between the reactants and products. It can be used to determine the moles of a chemical species when the moles of other chemical species present in the reaction is given.
Consider the general reaction,
[tex]{\text{A}}+2{\text{B}}\to3{\text{C}}[/tex]
Here,
A and B are reactants.
C is the product.
One mole of A reacts with two moles of B to produce three moles of C. The stoichiometric ratio between A and B is 1:2, the stoichiometric ratio between A and C is 1:3 and the stoichiometric ratio between B and C is 2:3.
The elemental copper that exists in its native state can be mined from its naturally occurring oxide or sulfide minerals. To extract copper from chalcopyrite certain reactions sequence is followed. First, the chalcopyrite is converted to its copper sulfide by the following reaction:
[tex]2{\text{CuFe}}{{\text{S}}_2}+3{{\text{O}}_2}\to2{\text{CuS}}+2{\text{FeO}}+2{\text{S}}{{\text{O}}_2}[/tex]
In the second step, the ferrous oxide thus formed is then treated with silica as follows:
[tex]2{\text{FeO}}+{\text{Si}}{{\text{O}}_2}\to2{\text{FeSi}}{{\text{O}}_3}[/tex]
In the third step, the copper sulfide decomposes as shown below:
[tex]2{\text{CuS}}\to{\text{C}}{{\text{u}}_2}{\text{S}}+{\text{S}}[/tex]
In the final sequence of the reaction, the [tex]{\text{C}}{{\text{u}}_2}{\text{S}}[/tex] formed undergoes following oxidation to form elemental copper.
[tex]{\text{C}}{{\text{u}}_2}{\text{S}}+{\text{S}}\to{\text{2Cu}}+2{\text{S}}{{\text{O}}_2}[/tex]
From these reactions, it is the evident that 2 moles of [tex]{\text{CuFe}}{{\text{S}}_2}[/tex] forms 2 moles of elemental copper. Therefore the molar ratio of the combination of Cu and [tex]{\mathbf{CuFe}}{{\mathbf{S}}_{\mathbf{2}}}[/tex] is 1:1.
Since one penny contains 3 g of Cu hence the mass of copper in 100 pennies is calculated as follows:
[tex]\begin{gathered}{\text{Mass of Cu}}=\left({\frac{{3\;{\text{g}}}}{{1\,{\text{penny}}}}}\right)\left({100\;{\text{pennies}}}\right)\\=300\;{\text{g}}\\\end{gathered}[/tex]
Using the mass of copper and the molar mass we would determine the number of moles of copper by applying the following formula.
[tex]{\text{Number of moles}}=\frac{{{\text{Given mass}}}}{{{\text{Molar mass}}}}[/tex] …… (1)
The given mass is [tex]300{\text{g}}[/tex].
The molar mass is [tex]{\text{63}}{\text{.546g/mol}}[/tex].
Substitute the values in equation (1).
[tex]\begin{gathered}{\text{Number of moles}}=\frac{{300.0{\text{g}}}}{{{\text{63}}{\text{.546g/mol}}}}\\=4.72099{\text{mol}}\\\end{gathered}[/tex]
The molar ratio of combination of Cu and [tex]{\text{CuFe}}{{\text{S}}_2}[/tex] is 1:1, so the number of moles of [tex]{\mathbf{CuFe}}{{\mathbf{S}}_{\mathbf{2}}}[/tex] is 4.72099 mol.
The moles of [tex]{\text{CuFe}}{{\text{S}}_2}[/tex] calculated can be used to determine the corresponding mass in grams. The formula to calculate the mass is as follows:
[tex]{\text{Mass of CuFe}}{{\text{S}}_2}=\left({{\text{moles of CuFe}}{{\text{S}}_2}}\right)\left({{\text{molar mass of CuFe}}{{\text{S}}_2}}\right)[/tex] …… (2)
The moles of [tex]{\text{CuFe}}{{\text{S}}_2}[/tex]is [tex]4.72099{\text{ mol}}[/tex].
The molar mass of [tex]{\text{CuFe}}{{\text{S}}_2}[/tex]is[tex]183.54{\text{g/mol}}[/tex].
Substitute the values in equation (2).
[tex]\begin{gathered}{\text{Mass of CuFe}}{{\text{S}}_2}=\left({4.72099{\text{ mol}}}\right)\left({183.54{\text{g/mol}}}\right)\\=866.49{\text{g}}\\\end{gathered}[/tex]
Learn more:
1. Statement about subatomic particle: https://brainly.com/question/3176193
2. The net ionic equation for the reaction of [tex]{\text{MgS}}{{\text{O}}_{\text{4}}}[/tex] with [tex]{\text{Sr}}{\left({{\text{N}}{{\text{O}}_3}}\right)_2}[/tex] : https://brainly.com/question/4357519
Answer details:
Grade: College
Subject: Chemistry
Chapter: Mole concept and stoichiometry
Keywords: copper, penny, pennies, CuFeS2, stoichiometry, O2, moles, mass, S and Cu2S.
a student 600 ml cup of cocoa gets cold. It was only 25°C. He put it in the microwave. How many calories must transfer to the cocoa to bring it up to 70°C
Answers
To get the answer, you must know first the formula for heat.
Heat = mass X specific heat X change in temp
We know that the mass is 600
Specific heat is 1
And the change in temperature is 70 – 25 which is 45.
Now plugging in those values:
Heat = 600 x 1 x 45 = 27,000 calories
Note: calorie is a unit of heat
A 60.2-ml sample of hg (density = 13.6 g/ml) contains how many atoms of hg?
Answers
density = mass / volume
therefore:
mass = density * volume
mass of Hg = 13.6 * 60.2 = 818.72 grams
From the periodic table:
molar mass of Hg = 200.59 grams
number of moles = mass / molar mass
number of moles of Hg = 818.72 / 200.59 = 4.08 moles
each mole contains Avogadro's number of atoms.
Therefore,
number of atoms in the given sample = 4.08 * 6.022 * 10^23
= 2.456976 * 10^24 atoms
For the reaction shown here, 2.3 mola is mixed with 1.6 molb and 3.1 molc. what is the limiting reactant? 3a+b+2c→3d
Answers
a : b : c
are
3 : 1 : 2
So we will check the amount of the other two reactants required by taking one as the base.
With a as the base,
2.3 : 0.77 : 1.53
The amounts of b and c required for 2.3 moles of a are present
With b as the base,
4.8 : 1.6 : 3.2
Both a and c are present in amounts less than that required for 1.6 moles of b.
With c as the base,
4.65 : 1.55 : 3.1
Only a is limiting in this case
From the above considerations, we see that a is always in quantities less than that which would be required, so a is the limiting reactant.
By comparing the relative amounts required of each reactant according to the stoichiometric coefficients in the chemical equation, 'b' is identified as the limiting reactant as it will be consumed first.
Explanation:In order to determine the limiting reactant in a chemical reaction, we need to take into account the stoichiometric coefficients in the balanced chemical equation. In the equation given, 3a + b+ 2c→3d, for every 3 moles of 'a', 1 mole of 'b' and 2 moles of 'c' are needed. Given the amounts of each, we have 2.3 mol 'a', 1.6 mol 'b', and 3.1 mol 'c'. For 'a' and 'c' to completely react, there should be 1 'b' for every 3 'a' and 1 'b' for every 2 'c'. Therefore, 'a' requires 2.3/3 = 0.77 mol 'b' and 'c' requires 3.1/2 = 1.55 mol 'b'. However, only 1.6 mol 'b' is available. Therefore, 'b' will be consumed before either 'a' or 'c', making 'b' the limiting reactant.
Learn more about Limiting Reactant here:https://brainly.com/question/33417913
#SPJ11
Which answer describes what happens during a chain reaction? Protons released during a fission reaction trigger other fission reaction. Electrons and protons released during a fission reaction trigger other fission reactions. Neutrons released during a fission reaction trigger other fission reactions
Answers
Neutrons released during a fission reaction trigger other fission reactions.
When an atom undergoes nuclear fission it releases free neutrons.
These free neutrons then trigger the next fission reaction by reacting with the next atom.
Thus a chain reaction is formed by neutrons released dusing a fission reaction.
how many grams oxygen are present in 76.8g of CO2
Answers
Anwer: 21.0g
Explanation:
But I noticed you got another. I wanted to see what I did wrong. Can you show me how you got 55.8g
A saturated solution of barium chloride at 30 degrees Celsius contains 150 g water. How much additional barium chloride can be dissolved by heating this solution to 60 degrees Celsius?
Answers
The quantity of barium chloride that is dissolved in water at 30 degree Celsius = 38.2 * [150/100] = 57.30 g.
The quantity of barium chloride that will be dissolved in water at 60 degree Celsius = 46.6 * [150/100] = 69.90 g
The difference between these quantities is the amount of barium chloride that can be dissolved by heating the barium chloride to 60 degree Celsius.
69.90 - 57.30 = 12.60 g. Therefore, 12.60 g of barium chloride can still be dissolved in the water by heating the water to 60 degree Celsius.
Completing a Punnett Square
Suppose you are tutoring a classmate on how to complete a Punnett square.
How would you explain to a classmate the process of using a Punnett square for a cross between one pea plant with genotype Tt and a second pea plant with genotype Tt, where T is the allele for a tall pea plant, and t is the allele for a short pea plant? Make sure to describe how you would find the probability that a given offspring of the two parents is tall or short.
Answers
(In the picture it shows your question just with different letters.)
Hint: The father gene is always on the top and the mother gene is on the left hand side.
The half life of a certain radioactive element is 1,250 years what percent of the atoms remain after 7500 years
Answers
7500/1250 = 6 half-lives, so 100(1/2)^6
= 100(0.015625)
= 1.5625% of the original element would remain
The amount of element after 7500 years will be 1.607% of initial amount.
Explanation:The half life of certain elements shows the time after which half of the amount of the element will disintegrate.
Half life of given atom = 1250 years.
The amount of element after 7500 years:
Total number of half life during this period = 7500/1250 = 6.
The amount of element after 1 half life = 50%
After 2nd half life = 25%
After 3rd half life = 12.5%
After 4 half life = 6.25%
After 5 half life = 3.125
After 6 half life = 1.607%
So the amount of element after 7500 years will be 1.607% of initial amount.
What type of technology would you want to use to study gas giant planets?
Answers
Final answer:
To study gas giant planets, direct imaging and infrared observations using telescopes like JWST and Hubble are effective. Missions similar to Juno would provide close examination. Pre-mission, understand the solar system's characteristics, the planet's orbit, gravity, atmosphere, and magnetism.
Explanation:
To study gas giant planets, various techniques and technologies can be utilized depending on the attributes of the planet and what information is sought. For instance, to explore young gas giant planets that emit infrared light and are located at considerable distances from their stars, direct imaging is one of the effective methods. It leverages the fact that these planets retain significant internal heat from their formation, thus emitting substantial infrared radiation.
When using a large modern telescope for such studies, one might consider the James Webb Space Telescope (JWST) or the Hubble Space Telescope for their ability to capture high-resolution images and detect faint infrared signals, respectively. An alternative approach could involve sending a dedicated mission, such as a space probe, to examine the gas giants more closely. For example, a mission akin to the Juno spacecraft could yield significant insights into these vast worlds, prioritizing those with the most intriguing or least understood characteristics based on preliminary observations.
In preparation for sending a probe to a distant planet such as Jupiter, one must know the characteristics of the solar system, including the target planet's orbit, gravitational field, atmospheric composition, and magnetic environment. This information is crucial to design a spacecraft that can survive and navigate such extreme conditions.
if a sample of gas is intially at 1.8 atm,22.0 l, and 26.4 c, what will be the volume if the pressure is reduced by 0.8 atm and the temperature is lowered to 20.3 c?
Answers
Final answer:
To find the new volume of the gas, we can use Boyle's Law, which states that if temperature and amount are constant, pressure and volume are inversely proportional. Using the equation P1V1 = P2V2 and substituting the given values, we find that the final volume will be approximately 39.6 L.
Explanation:
To solve this problem, we can use Boyle's Law, which states that if the temperature and amount of gas are kept constant, the pressure and volume of a gas are inversely proportional.
We can use the formula:
P1V1 = P2V2
Where P1 and V1 are the initial pressure and volume, and P2 and V2 are the final pressure and volume.
Substituting the given values, we have:
(1.8 atm)(22.0 L) = (1.0 atm + (-0.8 atm))(V2)
Solving for V2, we find that the final volume will be approximately 39.6 L.
To find the new volume after a pressure reduction and temperature decrease, convert the temperatures to Kelvin and use the combined gas law, showing that the initial and final states of the gas can be related by (P1V1T2) = (P2V2T1). Insert the known values into the equation and solve for the new volume, V2.
Explanation:To calculate the new volume of a gas when the pressure and temperature change, we can use the combined gas law which relates the pressure, volume, and temperature of a gas. The combined gas law is expressed as (P1V1T2) = (P2V2T1) where P is pressure, V is volume, and T is temperature in Kelvin.
To solve the student's question, first convert the temperatures from Celsius to Kelvin by adding 273.15: 26.4°C + 273.15 = 299.55 K and 20.3°C + 273.15 = 293.45 K. Now, insert the values into the combined gas law equation:
(P1V1T2) = (P2V2T1),
(1.8 atm × 22.0 L × 293.45 K) = ((1.8 atm - 0.8 atm) × V2 × 299.55 K),
Solve for V2, the new volume of the gas after pressure and temperature changes.
) how would your results have been affected if you had used water-insoluble pens, instead of water-soluble ones, in part 2 of this experiment
Answers
If water-insoluble pens are used in the reaction, the dyes components of the ink will not dissolve in water. Because the components of the ink did not dissolve in water, when the solution is spotted on the chromatography paper, the components of the ink will not be separated out.
Which of the following is a unit of volume of liquids?
1. Gram
2. Liters
3. Liters per cubic gram
4. Gram per cubic centimeter
PLEASE HELP!
Answers
A compound composed of only c and f contains 17.39 c by mass. what is its empirical formula
Answers
Since the Carbon C is 17.39% by mass hence the Fluorine F is 82.61% by mass. Divide each mass % by the respective molar masses, that is:
C = 17.39 / 12 = 1.45
F = 82.61 / 19 = 4.35
Divide the two by the smaller number, so divide by 1.45
C = 1.45 / 1.45 = 1
F = 4.35 / 1.45 = 3
So the empirical formula is:
CF3
Ionization involves completely removing an electron from an atom. light of a particular wavelength can cause ionization to occur if it has the required energy. the energy to ionize a certain element is 342 kj/mol. what wavelength contains enough energy in a single photon to ionize one atom of this element?
Answers
Final answer:
The wavelength containing enough energy in a single photon to ionize one atom of the given element is approximately 182 nm.
Explanation:
Ionization involves completely removing an electron from an atom. The energy required to ionize a certain element is 342 kJ/mol. The energy of a photon is given by the equation E = hc/λ, where E is the energy of the photon, h is Planck's constant, c is the speed of light, and λ is the wavelength of the photon. To calculate the wavelength, we can rearrange the equation to find λ = hc/E. Substituting the energy required for ionization, we have λ = (6.63x10^-34 J.s * 3x10^8 m/s) / (342x10^3 J/mol). Converting the result to nanometers, we find that the wavelength contains enough energy in a single photon to ionize one atom of the element is approximately 182 nm.
if a man has brown eye with the recessive gene for blue eyes (Bb), each of his sex cells will have
Answers
b - blue eyes
If we were to fill out a punette square each of his sex cells would contain at least one brown eyed gene.
one gene or the other, B or b that is the answer for study island
You are given solutions of hcl and naoh and must determine their concentrations. you use 27.5 ml of naoh to titrate 100. ml of hcl and 18.4 ml of naoh to titrate 50.0 ml of 0.0782 m h2so4. find the unknown concentrations.
Answers
(1) 27.5 mL of NaOH in 100 mL of HCl
(2) 18.4 mL of NaOH to titrate 50 mL of 0.0782 M of H2SO4
Of the two items, the one that can be easily answered is concentration of NaOH. Let x be the concentration of NaOH.
(18.4 mL)(x) = (50 mL)(0.0782 mol/L)(2 equivalents / 1 mol of H2SO4)
The value of x from the equation is 0.425 M of NaOH
Then, for the first item,
(27.5 mL)(0.425) = (100)(y)
The value of y from the equation is 0.116875 M
ANSWERS: The concentrations of HCl and NaOH are 0.12 M and 0.425 M.
how any grams of solid Mg(NO3)2 to dissolve in water to make your 0.1000 M solutions. specifically, write out the calculation to prepare 100.0mL of 0.1000M Mg(NO3)2 And 1000.0 mL of 0.10000M Sr(NO3)2
Answers
State the law of conservation of mass. Then apply the law to this question: what would be the total mass of the products of a reaction in which 10 grams of water decomposes into elements hydrogen and oxygen?
Answers
"For any closed system, mass is preserved. This means that the total amount of mass remains constant as mass can neither be created nor destroyed".
Applying this to the decomposition we have,
since the total mass of reactants (water) is 10 grams, therefore, the total mass of products (hydrogen and oxygen) is also 10 grams
Hey there!
The law of conservation of mass express that in any physical change or chemical reaction, mass is neither created or destroyed. This was according to the law. The total mass the products in the decomposition of water would be 10 grams. The total mass of the products would be the same mass as the total mass of the reactants.
Hope this helped you
Tobey