Hey im happy to help!
Heat can float from one place to another, like all energy.Heat floats in solids by conduction, that happens because the molecules hit one another.Heat within the solid will flow from hot to cold.Heat will flow downward if its cold there.
Hope this helps, have a great rest of your day!
Answer:
Heat flows in a cycle. Heat flows downward towards cold air.
how much energy is required to heat a chunk of ice that weighs 510g from -256°c to 195°c
The ice undergoes several transformations. First it absorbs energy and its temperature to raise the temperature to 0°C the melting point of water. Then the ice absorbs latent heat of fusion to melt, then absorbs heat to raise the temperature to 100°C the boiling point of water. then the steam is heated to 195°C
Therefore the following expression is used to calculate the heat required to make these changes
MC∅(ice)+MLf(ice)+MC∅(water)+MLv(water)+MC∅(water vapor)
0.51kg×2.108kJ/KgK×(0--256)K+0.51×333.55kJ/Kg+0.51kg×4.2 kJ/KgK×(100-0)+0.51kg×2260kJ/kg+ 0.51kg×1.996kJ/kgK× (195-100)K
= 1908.84kJ
what is the bond order .? calculate the bond order of H2.
Bond order: 1.
ExplanationHow many chemical bonds in a H₂ molecule?
There is one valence electron in each neutral H atom. Refer to a periodic table. H is one electron away from the closest noble gas: He. The H atoms need to achieve the noble gas configuration of He to be stable. For that, each H atom needs one more electron. There are two H atoms in an H₂ molecule. It will take 2 × 1 = 2 more electrons for both H atoms in each H₂ molecule to become stable.
Unlike ions, the H₂ molecule is neutral. There's no no extra electron for the H atoms. The two atoms need to share electrons with each other by forming chemical bonds. One chemical bond adds one electron to both bonding atoms. As a result, each bond will add two electrons to the molecule.
The H₂ molecule needs 2 extra electrons, which corresponds to 2 / 1 = 1 chemical bond.
What's the bond order?
[tex]\displaystyle\text{Bond Order} = \frac{\text{Number of Bonds}}{\text{Number of Bonding Sites}}[/tex].
The two H atoms in an H₂ molecule forms
one H-H chemical bond over one bonding site between the two H atoms.As a result,
[tex]\displaystyle\text{Bond Order} = \frac{\text{Number of Bonds}}{\text{Number of Bonding Sites}} = \frac{1}{1} = 1[/tex].
The bond order of H₂ is 1, calculated by subtracting the number of antibonding electrons from the number of bonding electrons (2 - 0), then dividing by 2. A bond order of 1 corresponds to a single covalent bond between the two hydrogen atoms.
Explanation:The bond order is a term in chemistry that refers to the number of chemical bonds between a pair of atoms. To calculate the bond order of H₂ (dihydrogen), we utilize molecular orbital theory. Given that the 0₁s (bonding) molecular orbital contains two electrons and the ot (antibonding) molecular orbital is empty, the calculation is straightforward. The bond order is calculated as one-half the net number of bonding electrons, which, in this case, is one-half the difference between the number of bonding and antibonding electrons:
Bond order of H₂ = ((bonding electrons) - 0 (antibonding electrons)) ÷ 2 = 2÷ 2 = 1.
This result corresponds to the single covalent bond observed between the two hydrogen atoms in a H₂ molecule, making the bond relatively strong and stable. The bond order of 1 reflects a single bond, which aligns with experimental data indicating that H₂ has a bond length appropriate for a single bond.
Nuclear energy can be used to power _______. a. street lights b. businesses c. homes d. all of the above Please select the best answer from the choices provided A B C D
All the above
-street lights
-businesses
- Homes, etc
Explanation; Nuclear energy comes from splitting atoms in a reactor to heat water into steam, turn a turbine and generate electricity.Nuclear reactions are used to release nuclear energy that generate heat, which most frequently is then used in steam turbines to produce electricity in a nuclear power plant.Because nuclear power plants do not burn fuel, they do not produce greenhouse gas emissions.Nuclear energy may be used in a wide variety of fields as it generates high levels of electricity without causing damage to our environment and atmosphere.Answer:
D. all of the above
Explanation:
What does LeChatelier’s principal mean
Answer: a principle stating that if a constraint (such as a change in pressure, temperature, or concentration of a reactant) is applied to a system in equilibrium, the equilibrium will shift so as to tend to counteract the effect of the constrain
what is the hybridization of Cl2CO
the hybridization is probably sp2. it will have 1pi bond. There is a double bond between C and O atoms and that double bond consists of 1 pi bond and 1 sigma bond.
Final answer:
The hybridization of carbon in Cl₂CO is sp² due to three electron domains (two Cl atoms and one double-bonded O atom) resulting in a trigonal planar geometry.
Explanation:
The hybridization of the central carbon atom in Cl₂CO (phosgene) is sp². This is because the carbon atom is bonded to two chlorine atoms and an oxygen atom through a double bond. To determine this, we analyze the electron domains around the carbon atom. With three domains (two single bonds and one double bond), it adopts sp² hybridization, which allows for trigonal planar geometry. It is important to note that the double bond with oxygen consists of one sigma (σ) bond and one pi (π) bond. The pi bond results from the lateral overlap of unhybridized p-orbitals, whereas the sigma bond is formed by the head-to-head overlap of sp² hybrid orbitals from carbon and oxygen.
True or false aspects of motion include speed and direction
True is the answer hope this helps
how much water do you need to add 10mL of a solution HCL with pH 3 to change the pH to 6
Who cares? unless you wanna be a scientist when you get older. this is pointless
10 mL more water is needed to do so...
is potassium a metal, nonmetal, or metalloid?
Yes, potassium is a metal
The minimum energy required to start a reaction
The answer to that question would be Activation energy. If would like me to elaborate just let me know. :)
Answer: Activation energy
Explanation:
Activation energy is the minimum energy required to initiate a chemical reaction.
It is the minimum energy required to excite reactant to break bonds and react with each other in the system while creating new products.
Convert 7.8 g of SO2 to moles
The answer is 0.12 moles of SO2.
The answer is 0.12 moles of SO2
please mark brainiest i just need one more crown so i could be an expert please and thank you =)
Select the correct equalities for the units shown.
1 cm = 10 mm
1 ft = 3 yd
100 m = 1 cm
1 kg = 1,000 g
12 in = 1 ft
Enter the correct answer for each unit conversion.
mm = 5 cm
48 in =
ft
ft = 12 yd
2.5 m =
cm
1,000 mL =
L
Answer
1. 1cm=10mm, 1kg=1000g and 12in=1 ft
2. 50mm=5cm
48 in =4ft
36ft=12 yd
2.5m=250cm
1000mL= 1 L
Explanation
if 1cm=10mm then 5cm=?
5×10=50mm
if 12 in =1ft then 48in=?
48/12 =4 ft
if 1m=100cm, then 2.5m=?
2.5×100= 250cm
and when know from capacity that 1000mL is equivalent to 1 liter.
Calculate the mass in grams of 3.94×1024 molecules of formaldehyde. The chemical formula for formaldehyde is CH2O.
Answer:
Mass in grams of formaldehyde = 196.51 g
Explanation:
No. of molecules of formaldehyde = [tex]3.94 \times 10^{24}[/tex]
Moles is related with number of molecules as:
[tex]mol=\frac{No.\ of\ molecules}{Avogadro's\ no.}[/tex]
Avogadro's no. = [tex]6.02 \times 10^{23}[/tex]
moles of formaldehyde
[tex]=\frac{3.94\times 10^{24}}{6.02\times 10^{23}} \\=6.544\ mol[/tex]
Molar mass of formaldehyde = 30.03 g/mol
Molar mass is related with mass as:
Mass = Moles × Molar mass
= 6.544 × 30.03
= 196.51 g
Please help! I'm struggling!
the answer is 1 or A
need help please!!!!!!!
Which two objects have stored energy?
a ball rolling on the ground
a small rock sitting on top of a big rock
a stretched rubber band
a stone lying on the ground
Answer:
a small rock sitting on top of a big rock
a stretched rubber band
Explanation:
A small rock sittin on the top of a big rock has stored energy because of the potential energy that it contains, as well as the stretched rubber band in all the kinetic energy that is stored in the streched rubber band and it is just about to free it as soon as what is keeping it stretched liberates it.
tudy the image above. Which statement below best explains the steps of tornado formation?
A) Step 1: a horizontal spinning effect is formed from rainfall
Step 2: warm fishing air shifts the horizontal rotation to a vertical column
Step 3: the vertical rotation retracts.
Eliminate
B) Step 1: a horizontal spinning effect is formed from wind shear
Step 2: cold air from the ground causes the horizontal rotation to become vertical
Step 3: the vertical rotation retracts
C) Step 1: a horizontal spinning effect is formed from wind shear
Step 2: warm rising air shifts the horizontal rotation to a vertical rotation
Step 3: the vertical rotation expands and extends
D) Step 1: a horizontal spinning effect is formed from rainfall
Step 2: cold air from the ground causes the horizontal rotation to become vertical
Step 3: the vertical rotation expands and extends
C) Step 1: a horizontal spinning effect is formed from wind shear
Step 2: warm rising air shifts the horizontal rotation to a vertical rotation
Step 3: the vertical rotation expands and extends
When a H atom and a Cl atom react to form a HCl molecule,
When a hydrogen atom and a chlorine atom react to form a hydrogen chloride molecule, the hydrogen atom acquires a partial positive charge, and the chlorine atom acquires a partial negative charge.
Explanation:When a hydrogen (H) atom and a chlorine (Cl) atom react to form a hydrogen chloride (HCl) molecule, the hydrogen atom acquires a partial positive charge, and the chlorine atom acquires a partial negative charge. This is because of the electronegativity difference between hydrogen and chlorine. The hydrogen atom loses its electron to the highly electronegative chlorine atom, resulting in a partial positive charge on the hydrogen atom and a partial negative charge on the chlorine atom.
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H-H and Cl-Cl bonds break to HCl Formation bonds in an exothermic reaction. This results in hydrogen chloride or HCl, which behaves as an acid in water, producing hydronium and chloride ions.
When a hydrogen atom and a chlorine atom react, H-H bonds and Cl-Cl bonds are broken to form two moles of HCl.
The energy to break these bonds is 436 kJ/mol for the H-H bond and 243 kJ/mol for the Cl-Cl bond.
When the reaction takes place, two moles of strong H-Cl bonds form, releasing an energy of 864 kJ (432 kJ/mol for each bond).
Hence, the reaction is exothermic as more energy is released than consumed.
Furthermore, in HCl, hydrogen acquires a partial positive charge, while chlorine acquires a partial negative charge, contributing to the molecule's polar nature.
If dissolved in water, HCl behaves as an acid, transferring protons to water molecules and yielding hydronium ions and solvated chloride ions.
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The probable question may be:
When a hydrogen atom and a chlorine atom react with each other what does it formed?
Which equation correctly shows how you could calculate [OH-] from [H+]
Answer:
[OH⁻] = 10⁻¹⁴/[H⁺].
Explanation:
∵ [H⁺][OH⁻] = 10⁻¹⁴.
∴ [OH⁻] = 10⁻¹⁴/[H⁺].
Answer:
[tex]Kw = [H+][OH-][/tex]
Explanation:
For a given solution H+ refers to the hydrogen ion concentration and is indicative of the acidity of the solution. The more the [H+] concentration, higher is the acidity. Similarly, OH- refers to the hydroxide ion concentration and reflects the basicity of the solution. A solution with a higher OH- concentration is said to be basic.
The two are related by considering the dissociation of water:
[tex]H2O(l)\rightleftharpoons H+(aq)+ OH-(aq)[/tex]
The dissociation constant for water, Kw is:
[tex]Kw = [H+][OH-]\\\\where\ Kw = 10^{-14} \\\\10^{-14} = [H+][OH-]\\[/tex]
[tex][H+] = \frac{10^{-14}}{[OH-]}[/tex]
Find the moles of each product formed when 3.40 mol C3H7OH reacts with oxygen
the balanced equation for the combustion reaction is as follows
2C₃H₇OH + 9O₂ ---> 6CO₂ + 8H₂O
we are assuming that O₂ is in excess and C₃H₇OH is the limiting reactant
therefore the amount of product formed depends on the amount of C₃H₇OH present.
we have to find the number of CO₂ and H₂O moles formed
molar ratio of C₃H₇OH to CO₂ is 2:6 simplified to 1:3
when 1 mol of C₃H₇OH reacts - 3 mol of CO₂ is formed
therefore when 3.40 mol of C₃H₇OH reacts - 3 x 3.40 = 10.2 mol of CO₂ is formed
molar ratio of C₃H₇OH to H₂O is 2:8 simplified to 1:4
when 1 mol of C₃H₇OH reacts - 4 mol of H₂O is formed
therefore when 3.40 mol of C₃H₇OH reacts - 4 x 3.40 = 13.6 mol of H₂O is formed
10.2 mol of CO₂ and 13.6 mol of H₂O is formed
What is the percent by volume concentration of 58.0 mL of water in 920 mL of an acetic acid-water solution?
Answer:
= 5.93 %
Explanation:
Volume % of a component is given by the formula;
= (Volume of the component/Total volume of the solution) x 100
Volume of the component = 920 mL
Total volume of the solution = 920 + 58 = 978 mL
Therefore;
Cvolume % = 58 mL/978 mL × 100%
= 5.93 %
A chemical bond forms when the _____ of one element interact(s) with another element.
Atom
A chemical bond forms when the atom of one element interact(s) with an atom of another element.
Explanation;A chemical bond is an attraction between atoms, ions or molecules that enables the formation of chemical compounds.There are several types of chemical bonds, they include;Ionic bonding which involves the transfer of an electron, where one atom gains an electron while one atom loses an electron.Covalent bond which involves the sharing of electrons between two atoms. Polar bond and hydrogen bond among othersInferences are A. never made by scientists. B. questions that are made by studying conclusions or predictions. C. exactly the same as observations. D. conclusions or predictions that are made by studying observations.
The Answer Is D. Have A Great Day
Answer:
D
Explanation:
What roles and responsibilities do the media have in reporting human right violation in a responsible manner
You're question is similar to this one: https://brainly.com/question/3611487
which already has an answer.
Explanation:
Media reflects the society. It shows the true facts about the society. Media plays a very important role in show casing the injustice or the wrong that is going on in the society. It should report all the matters correctly about the violation that occurred. It should not spread any false news but should show the truth behind any violations. It should also aware people about the cause of the violation and also the consequences of it so not it will not be repeated in the future.
A balloon with a volume of 8.00 L is known to contain 1.200 moles of gas. How many moles of gas remain if some of the gas is released and the new volume is 5.25 L. Assume temperature and pressure remain constant
Avagadros law states that at constant pressure and temperature conditions the volume is directly proportional to number of moles of gas
[tex]\frac{v1}{n1} = \frac{v2}{n2} \\[/tex]
where v1 is volume and n1 is number of moles at first instance
v2 is volume and n2 is number of moles after some of the gas is released
substituting the values in the equation
[tex]\frac{8.00 L}{1.200 mol} = \frac{5.25 L}{n2}[/tex]
n2 = 0.788 mol
after some of the gas is released only 0.788 mol remain
A sample of O2 occupies 75L at standard temperature and pressure. If the volume of the sample doubles, what is the new pressure of O2? _____ atm
Answer:
0.5
Explanation:
The concept Boyle's law is used here to determine the new pressure of oxygen. There are several gas laws in order to explain the properties of a gas. Boyle's law is one among them. Here the new pressure is 0.5 atm.
What is Boyle's law?Boyle's law states that at constant temperature, the volume of a given mass of gas is inversely proportional to the pressure. At constant temperature, the product of pressure and volume of a given mass of gas is constant.
Mathematically the law can be expressed as:
V ∝ 1 /P
Or PV = k (Constant)
For two gases, the equation is:
P₁V₁ = P₂V₂
Here standard pressure is 1 atm and when the volume doubles, it becomes 150.
P₂ = P₁V₁ / V₂
1 × 75 / 150 = 0.5
Thus the new pressure is 0.5 atm.
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Which property is not important when selecting a material to use as a light bulb filament?
Answer:
When selecting a material to use as a light bulb filament, there are several important properties to consider. However, one property that is not important in this context is color. The color of the filament does not affect its functionality or performance as a light source.
The primary function of a light bulb filament is to produce light when an electric current passes through it, and its color does not impact this process. The color of the light emitted by the bulb is determined by other factors, such as the gases or coatings inside the bulb.
When selecting a material for a light bulb filament, important properties to consider include:
1. Resistance: The material should have high electrical resistance to prevent excessive current flow and overheating.
2. Melting Point: The material should have a high melting point to withstand the high temperatures generated by the electric current passing through it.
3. Conductivity: The material should have good electrical conductivity to efficiently carry the current and produce light.
4. Durability: The material should be durable enough to withstand repeated heating and cooling cycles without breaking or deforming.
5. Cost: The material should be cost-effective to produce in large quantities, as light bulbs are commonly used in everyday applications.
By considering these properties, manufacturers can select the most suitable material for the filament, ensuring optimal performance and longevity of the light bulb.
HELP ASAP
A red capital "L" over your home on a weather map probably indicates _____. A. rain B. clear skies C. freezing weather D. changing weather
Your boss asks you to design a room that can be as soundproof as possible and provides you with three samples of material. The only information on each sample's label is the material's coefficient of absorption. The coefficient of absorption listed on Sample A is 30%, on Sample B is 47%, and on Sample C is 62%. When your boss asks for your choice and the reasoning behind it, what would you tell him?
sample c because it has the highest absorption
How many copper atoms are in a pure copper statue with a mass of 120 kg ?
Step #1: Convert to grams.
120kg × (1000g ÷ 1kg) = 120000g of copper
Step #2: Convert sample mass of copper to moles by dividing sample mass to its atomic weight. Atomic weights could be found in periodic table.
120000g Cu × (1mol Cu ÷ 63.55g Cu) = 1888.277mol Cu
Step #3: Convert moles to atoms by multiplying moles to Avogadro's number.
1888.277mol Cu × (6.022x10^23 ÷ 1mol Cu) = 1.137x10^27 atoms Cu
*I attached a picture to help out with conversions.
There is 120000 grams in a pure copper statue.
2C(s) + 2H2(g) → C2H4(g): ΔH = +52.4 kJ/mol
Which statement about this reaction is correct?
26.2 kJ of energy are absorbed for every mole of carbon reacted
Explanation;ΔH is the enthalpy change which is given by subtracting the energy of reactants from the energy of products.That is; ΔH = energy of products - energy of reactantsIn this case, it means that C2H4 has more energy than the the reactants. 52.4 J of energy to be precise, this energy is absorbed during the reaction.However, Two moles of Carbon require that much energy, thus one mole will require only 26.2 to react.Answer: D) 26.2 kJ of energy are absorbed for every mole of carbon reacted.
Biomass can be used to generate electricity. Biomass relies heavily on agricultural crops. Plants release carbon dioxide and water in combustion. Plants use photosynthesis to originally generate the energy that is needed. The chemical energy of these plants all started with what energy source?
A) wind energy
B) solar energy
C) mechanical energy
D) geothermal energy
Solar energy.
This whole process starts with the solar energy. It also involves the sun within the process. Solar energy is radiant light and heat that comes from the sun. So it seems to fit in with the story that was given.
Best of luck on your assignment!
- Emacathy
Answer:
B) solar energy
Explanation: