Answer:
Explanation:
In a chemical formula, the oxidation state of transition metals can be determined by establishing the relationships between the electrons gained and that which is lost by an atom.
We know that for compounds to be formed, atoms would either lose, gain or share electrons between one another.
The oxidation state is usually expressed using the oxidation number and it is a formal charge assigned to an atom which is present in a molecule or ion.
To ascertain the oxidation state, we have to comply with some rules:
The algebraic sum of all oxidation numbers of an atom in a neutral compound is zero. The algebraic sum of all the oxidation numbers of all atoms in an ion containing more than one kind of atom is equal to the charge on the ion.For example, let us find the oxidation state of Cr in Cr₂O₇²⁻
This would be: 2x + 7(-2) = -2
x = +6
We see that the oxidation number of Cr, a transition metal in the given ion is +6.
Answer: it's total charge of something I already forgot
Explanation: finished quiz don't listen to Einstein above me why do u think he got little votes and likes
Describe a structure of a ecosystem
Answer:
"Ecosystem is the major ecological unit. It has both structure and functions. The structure is related to species diversity. The more complex is the structure the greater is the diversity of the species in the ecosystem. The functions of ecosystem are related to the flow of energy and cycling of materials through structural components of the ecosystem."
Explanation:
26. Which waves have wavelengths longer than those of visible light? Give an example of how each kind
of wave is used.
Answer:
Infrared radiation lies between the visible and microwave portions of the electromagnetic spectrum. Infrared waves have wavelengths longer than visible and shorter than microwaves, and have frequencies which are lower than visible and higher than microwaves.
Explanation:
For the reaction below, describe the temperature and pressure conditions that would produce the highest yield for the forward reaction. Explain your answer in terms of Le Châtelier's principle. (2 points)
N2(g) + 3H2(g) Two arrows stacked on top of each other. The top arrow points to the right. The bottom arrow points to the left. 2NH3(g) delta H = -92 kJ/mol
Answer:
According to Le Chatelier's Principle, low temperature and high pressure are the condition that will produce the highest yield of ammonia.
Explanation:
The Haber process is a reaction that combines nitrogen with hydrogen to form ammonia according to the following balanced equation:
N₂ ₍g₎ + 3 H₂ ₍g₎ ⇆ 2NH₃ ₍g₎ ΔH = -92 kJ/molEquilibrium considerations for Temperature changes:
You need to shift the equilibrium position as far as possible favoring the forward reaction (reaction to the right) in order to obtain the highest yield of ammonia in the equilibrium mixture. the reaction is exothermic and can be expressed as following:
N₂ ₍g₎ + 3 H₂ ₍g₎ ⇆ 2NH₃ ₍g₎ + heatIf the temperature is increased, the heat content of the system will increase, so the system would consume some of that heat by shifting the equilibrium to the left, thereby producing less ammonia.
According to Le Chatelier's Principle, the forward reaction will be favored if you lower the temperature you will get more ammonia (i.e. highest yield). The system will respond by moving the position of equilibrium to counteract this - in other words by producing more heat.
Equilibrium considerations for Pressure changes:
for the Haber process reaction
N₂ ₍g₎ + 3 H₂ ₍g₎ ⇆ 2NH₃ ₍g₎One can note that there are 4 moles on the left-hand side of the equation, but only 2 on the right.
According to Le Chatelier's Principle, if you increase the pressure the system will respond by favoring the reaction which produces fewer no. of moles. That will cause the pressure to fall again.
In order to get as much ammonia as possible in the equilibrium mixture, you need as high a pressure as possible producing more ammonia (i.e. highest yield)..
An automobile tire at 30°C has a pressure of 3.00 atm. Temperature decreases to -5°C. Assume that there is no volume change in the tire.
What is the new pressure of the tire after the temperature change?
? atm
Answer:
2.65 atm.
Explanation:
We can use the general law of ideal gas: PV = nRT.where, P is the pressure of the gas in atm.
V is the volume of the gas in L.
n is the no. of moles of the gas in mol.
R is the general gas constant,
T is the temperature of the gas in K.
If n and V are constant, and have different values of P and T:(P₁T₂) = (P₂T₁).
P₁ = 3.0 atm, T₁ = 30°C + 273 = 303 K,
P₂ = ??? atm, T₂ = -5°C + 273 = 268 K.
∴ P₂ = (P₁T₂)/(T₁) = (3.0 atm)(268 K)/(303 K) = 2.65 atm.
In ___ waves combine so that the resulting wave is bigger than the largest of the original waves?
Answer:
The answer is...
Explanation:
Constructive Interference
Answer:
[tex]\boxed{\text{phase}}[/tex]
Explanation:
When two waves are in phase, their peaks and troughs line up.
They undergo constructive interference, and the amplitude of the resulting wave is larger than either of the individual waves.
In the diagram below, the two red waves are in phase, and they combine to give a new wave (green) with a greater amplitude.
Which is the first element in the periodic table to have an electron configuration in the 4th energy level? beryllium carbon potassium titanium
titanium electronic configuration
3d2 4S2
Answer:
The answer is: Potassium because is the first element in period four.
Explanation:
Ok, the electron configuration is the distribution of electrons of an atom or molecule in atomic or molecular orbitals. Since 1s can only hold two electrons, the next 2 electrons are in the 2s orbital. Then put six in the 2p orbital and put the next two electrons in the 3s. Now, move to the 3p where it is place the next six electrons. Then shift to the 4s orbital where we place the remaining one electron. Therefore the Potassium electron configuration will be:
[tex]1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 4s^{1}[/tex]
Which structural feature will differ among an ester, an alcohol, and an aldehyde, regardless of which examples are being compared?
the functional group
the branching pattern of the carbon chain
the number of carbon atoms
Answer:
The functional group
Explanation:
A functional group defines a hydrocarbon. an ester the functional group is an O- alkyl group while that one of an alcohol is -OH group. An aldehyde is a functional group on its own.
Answer: the functional group
Explanation:
Functional groups are specific group of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules.
1. Esters have functional group [tex]-O=C-OR[/tex].
Example: methyl ethanoate with molecular formula [tex]CH_3COOCH_3[/tex]
2. Alcohols have functional group [tex]-OH[/tex].
Example: Propanol with molecular formula [tex]CH_3CH_2CH_2OH[/tex]
3. Aledydes have functional group [tex]-O=CH[/tex].
Example: propanal with molecular formula [tex]CH_3CH_2CHO[/tex]
Thus esters , alcohols and aldehydes may have same number of carbon atoms and similar branching pattern but different functional groups.
Ethene reacting with hydrogen gas would produce...
Your answer:
propane
ethane
ethyne
Answer:
Ethene reacting with hydrogen gas would produce ethane .
Explanation:
Hydrogenation of alkene gives alkane.
Hydrogenation of ethene gives the saturated hydrocarbon "ethane".
According to the equation:
C₂H₄ + H₂ → C₂H₆.
What are the two processes underlying this image that turn peat into coal
Answer:
Peatification and coalification
Explanation:
https://energyeducation.ca/encyclopedia/Coal_formation
Answer: Option (D)
Explanation: In order to form coal, two processes might be undergone and they are as follows-
Peatification- It is the process by which the remains of trees and plants undergoes partial decomposition in a swampy type of environment, conserving organic matter. It is the first stage of coal formation.Coalification- It is the process of complete transformation of the dead remains of plants and trees into coal.Thus the correct answer is option (D).
Gamma radiation is electromagnetic energy
True or false
Hey there! :D
This is a true statement. Gamma radiation comes from electromagnetic energy from radioactive decay. This decay has the shortest electromagnetic wave lengths and therefore has the highest photon energy. It is extremely dangerous. Radiation in general is something to be cautious of!
I hope this helps!
~kaikers
What type of hydrocarbon is 2-octene, and what about the structure allows 2-octene to be classified as this type of hydrocarbon?
an alkene because there is a double bond
Final answer:
2-Octene is an alkene, a type of unsaturated aliphatic hydrocarbon with a double bond between the second and third carbon atoms in its eight-carbon chain. The double bond's position is what allows us to classify it as an alkene, in line with its general formula CnH2n.
Explanation:
A hydrocarbon is defined as a compound composed entirely of hydrogen and carbon atoms. The two general types of hydrocarbons are aliphatic and aromatic hydrocarbons. Aliphatic hydrocarbons are further subdivided into alkanes, alkenes, and alkynes. Alkanes are hydrocarbons with only single bonds, alkenes contain one or more double bonds, and alkynes contain one or more triple bonds.
2-Octene is an example of an alkene, which is a type of unsaturated aliphatic hydrocarbon. The term '2-octene' indicates that the hydrocarbon has eight carbon atoms (oct-) and a double bond (--ene) between the second and third carbon atoms, as implied by the number '2' in its name. The presence of this double bond is what allows us to classify 2-octene as an alkene, and its molecular formula can be approximated as CnH2n, which fits the general formula of alkenes.
Block mountains form along which type of geological landform?
A. Fault blocks
B. The asthenosphere
C. Rift valleys
D. Orogenic belts
Answer:
A. Fault blocks
Explanation:
The block mountains are formed by pieces of the crust that breaks down and pieces are pushed up by the movement of the crust around them. These type of mountains usually have a steep and a slope side, due to the irregular nature of the fracture. Example of such mountains are the Sierra Nevada mountains in North-America.
They're not caused by the collision of two tectonic plates, like most of the mountains of our planet.
Answer: A. fault blocks
Explanation: Fault-block Mountains - Fault-block mountains are formed along fault lines (the edge between plates).
The huge chunks of rock on either side of the fault are called fault blocks. As the tectonic plates
move, some of the fault blocks are pushed up, while others are pushed down. This difference in
elevation (height) forms fault block mountains. The Sierra Nevada Mountains in the western United
States are fault-block mountains.
nys, de
Which statement is an identifying characteristic of a
mixture?
(1) A mixture can consist of a single element.
(2) A mixture can be separated by physical means.
(3) A mixture must have a definite composition by
weight.
(4) A mixture must be homogeneous.
Answer:
[tex]\boxed{\text{(2) A mixture can be separated by physical means.}}[/tex]
Explanation:
For example, you can separate a mixture of sand and water by pouring it through a coffee filter.
(1) is wrong. A mixture must have at least two components.
(3) is wrong. A mixture can have a any composition depending on the amount of each component.
(4) is wrong. A mixture of sand and water is heterogeneous,
answer is #2 : a mixture can be separated by physical means
Balance the following redox equation, identifying the element oxidized and the element reduced. Show all of the work used to solve the problem.
HNO3 + P yields H3PO4 + NO
Will make brainliest!
Answer:
N is reduced; P is oxidized;
5HNO₃ + 2H₂O + 3P ⟶ 5NO + 3H₃PO₄
Explanation:
Probably the easiest way to balance the equation is to use the ion-electron method.
Step 1. Write the skeleton equation
HNO₃ + P ⟶ H₃PO₄ + NO
Step 2. Separate into two half-reactions.
HNO₃ ⟶ NO
P ⟶ H₃PO₄
Step 3. Balance all atoms other than H and O
Done
Step 4. Balance O by adding H₂O molecules to the deficient side.
HNO₃ ⟶ NO + 2H₂O
4H₂O + P ⟶ H₃PO₄
Step 5. Balance H by adding H⁺ ions to the deficient side.
3H⁺ + HNO₃ ⟶ NO + 2H₂O
4H₂O + P ⟶ H₃PO₄ + 5H⁺
Step 6. Balance charge by adding electrons to the deficient side.
3H⁺ + HNO₃ + 3e⁻ ⟶ NO + 2H₂O
4H₂O + P ⟶ H₃PO₄ + 5H⁺ + 5e⁻
The N atom is reduced because it gains electrons. The P atom is oxidized because it loses electrons.
Step 7. Multiply each half-reaction by a number to equalize the electrons transferred.
5 × [3H⁺ + HNO₃ + 3e⁻ ⟶ NO + 2H₂O]
3 × [4H₂O + P ⟶ H₃PO₄ + 5H⁺ + 5e⁻]
Step 8. Add the two half-reactions.
15H⁺ + 5HNO₃ + 15e⁻ ⟶ 5NO + 10H₂O
12H₂O + 3P ⟶ 3H₃PO₄ +15H⁺ + 15e⁻
15H⁺ + 5HNO₃ + 15e⁻ + 12H₂O + 3P ⟶ 5NO + 10H₂O + 3H₃PO₄ + 15H⁺ + 15e⁻
Step 9. Cancel species that occur on each side of the equation
15H⁺ + 5HNO₃ + 15e⁻ + 2(12)H₂O + 3P ⟶ 5NO + 10H₂O + 3H₃PO₄ + 15H⁺ + 15e⁻
becomes
5HNO₃ + 2H₂O + 3P ⟶ 5NO + 3H₃PO₄
Step 10. Check that all atoms are balanced.
[tex]\begin{array}{ccc}\textbf{Atom} & \textbf{On the left} & \textbf{On the right}\\\text{H} & 9 & 9\\\text{N} & 5 & 5\\\text{O} & 17 & 17\\\text{P} & 3 & 3\\\end{array}[/tex]
Step 11. Check that charge is balanced
[tex]\begin{array}{cc}\textbf{On the left} & \textbf{On the right}\\0 & 0\\\end{array}[/tex]
Everything checks. The balanced equation is
5HNO₃ + 2H₂O + 3P ⟶ 5NO + 3H₃PO₄
what is the frequency of a wave where 3 wavelenths pass 1 second
Answer:
3 Hz
The frequency is three waves per second, or 3 Hz.
Rob and Carla observed two trails of dogs' footprints in the mud. The spacing between the footprints in one set was markedly larger than in the other. Rob concluded that one of the dogs must have been bigger than the other. However, Carla had a different explanation.
Which is the BEST alternative to Rob's conclusion?
A) The two dogs were of different ages.
B) One of the dogs was in search of food.
C) The two dogs were of different species.
D) One of the dogs ran faster than the other.
Answer: Option (D) is the correct answer.
Explanation:
When a dog runs faster then due to more force applied by the foot there occurs large footprints of the dog.
Spaces between the feet of dog increases due to running faster as running makes an individual to take long steps.
Whereas when a dog walks normally then his footprints will be smaller in size.
Therefore, we can conclude that the BEST alternative to Rob's conclusion is that one of the dogs ran faster than the other.
1. the smallest complete unit of a compound or diatomic gas shell
2. a new substance formed by the combination of two or more different atoms element
3. path of electrons around an atomic nucleus molecule
4. a substance consisting of only one type of atom compound
Answer:
Explanation:
1. The smallest complete unit of a compound or diatomic gas
ATOM
Atoms are small tiny particles that makes up a molecule. It is regarded as the smallest indivisible particle that parts in a chemical reaction.
2. A new substance formed by the combination of two or more different atoms
COMPOUNDS
Compounds are substances composed of two or more kinds of atoms. Their properties differs from those of the constituent elements that combines to make them up.
3. Path of electrons around an atomic nucleus
SHELL
The shell describes the path of an electron round a nucleus
4. A substance consisting of only one type of atom
MONOATOMIC MOLECULE
It is an aggregate of one type of atom.
Radiation occurs when
energy is transferred by electromagnetic waves.
Answer:
thermal
Explanation:
I can confirm that the answer you have to type down is thermal.
How would 0.073 be written in scientific notation
Answer:
7.3
⋅
10
−
2
Explanation:
Answer:yo yo
Explanation:
123
Which of the following requires the most energy to get started?
A. A nuclear fusion reaction
B. Radioactive decay
C. A chemical reaction
D. A nuclear fission reaction
Answer: it's c
Explanation:
Among nuclear fusion reaction, radioactive decay, nuclear fission reaction, and a chemical reaction, a nuclear fusion reaction requires the most energy to get started.
Explanation:Out of the options provided, a nuclear fusion reaction requires the most energy to get started. Fusion is the process where two light atomic nuclei combine to form a heavier nucleus. This process releases a tremendous amount of energy, but initiating it requires significant energy to overcome the electrostatic forces repelling the positively charged nuclei. In comparison, radioactive decay, a nuclear fission reaction, and a chemical reaction require less initial energy as they generally occur spontaneously under the right conditions.
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HELP ASAP! GIVING BRAINLIEST!! 15 POINTS
Think about the process of raising a pendulum to one side and letting it go. For this event, create a list associated with the pendulum as it cycles from the choices below:
KINETIC ENERGY FORMS:
- Motion energy
- Thermal energy
- Electric energy
- Vibrational energy
- Radiant energy
POTENTIAL ENERGY FORMS:
- Gravitational Potential energy
- Elastic Potential energy
- Chemical Potential energy
- Electric Potential energy
- Magnetic Potential Energy
- Nuclear Potential energy
Answer:
1. Potential energy
2. Potential and kinetic energy
3. Kinetic energy
4. Potential and kinetic energy
5. Potential energy
Explanation:
As shown in picture <3 !!
The list associated with a pendulum as it cycles from the choices below are:
1. Potential energy.
2. Potential and kinetic energy.
3. Kinetic energy.
4. Potential and kinetic energy.
5. Potential energy.
What is potential and kinetic energy?Potential energy is the energy that is the saved in the still state of any object or stored form of energy before it starts to motion.
The kinetic energy is the energy used to perform any work or the energy used when any object is in motion.
Thus, the correct options are 1. Potential energy., 2. Potential and kinetic energy.3. Kinetic energy., 4. Potential and kinetic energy., 5. Potential energy.
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What is the charge of the neutron
Answer:
Neutral (no net charge)
Explanation:
Protons - Positive
Electrons - Negative
Neutrons - No charge
Why?
Neutrons are the particle in an atom with a (as the name suggests) neutral charge. They are neither positive nor negative, unlike protons or electrons.
the volume of a gas is proportional to number of moles of a gas is known as
Answer:
A modern statement is: Avogadro's law states that, "equal volumes of all gases, at the same temperature and pressure, have the same number of molecules." For a given mass of an ideal gas, the volume and amount (moles) of the gas are directly proportional if the temperature and pressure are constant.
Answer:
Pressure - Inversely proportional to volume.
Pressure & Volume - Directly proportional to the number of moles.
Volume - Standard is 22.4L.
Temperature - Directly proportional to the average kinetic energy. and Standard is 273K.
All - Relationship determined by Ideal Gas Law.
what kind of energy is required for photosynthesis to occur
Answer:
light energy to convert carbon dioxide and water into glucose and oxygen gas. Each molecule of glucose essentially “stores” up to 38 molecules of ATP which can be broken down and used during other cellular reactions.
Explanation:
Answer:
Plants use sunlight to make glucose.
Its solar energy. Plants use the sun for energy.
Hope This Helps! Have A Nice Day!!
the mass of 2.50 moles of calcium fluoride (CaF2) is how many grams ?
Answer:
195.199grams
Explanation:
Fluorine has a molar mass of 18.99984 while calcium has a molar mass of calcium is 40.08.
1 mole of calcium fluoride has a mass of 40.08+2×18.99984
=78.0797 grams
if one mole has a mass of 78.0797 grams, then 2.5 moles have:
2.5 moles× 78.0797 grams/mole= 195.1992 grams
Answer:
195
Explanation:
First, calculate the molar mass of CaF2:
Ca: 1 × 40.078 g/mol = 40.078 g/mol
F: 2 × 18.998 g/mol = 37.996 g/mol
40.078 g/mol + 37.996 g/mol = 78.074 g/mol CaF2
Then, convert moles to grams by multiplying the number of moles by the molar mass:
2.50 mol CaF2 × 78.074 g/mol CaF2 = 195 g CaF2
Using the diameter information from the table, which answer lists the planets in the correct order, from largest to smallest?
A
Venus, Jupiter, Mercury
B
Neptune, Uranus, Mars
C
Mercury, Venus, Earth
D
Saturn, Uranus, Earth
The planets, in order from largest to smallest diameter, are ordered as follows in the options given: Saturn, Uranus, Earth. Therefore, the correct answer is D.
Explanation:The correct order of planets, from largest to smallest based on diameter, is reflected in answer option D: Saturn, Uranus, Earth. Saturn is the second largest planet, Uranus is the third largest, and Earth is the fifth largest ignoring the four smallest planets which are Neptune, Mars, Venus, and Mercury. Therefore, according to the given options, D is the most accurate listing of planets from largest to smallest based on diameter.
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how many moles of iron chloride are produced when 6 moles of chlorine gas react with excess iron
Answer:
12.0107
Explanation:
Hope this helps!
The atomic number of an atom is??
Number of protons in the nucleus of an atom.
Answer:
The Atomic Number of an atom is the number of protons it contains (which are located in the nucleus of the atom).
how many grams of carbon dioxide would be formed if 38.9 g of C2H2 reacted completely with oxygen
Answer:
131.7 grams of carbon dioxide would be formed
Explanation:
2C₂H₂ + 5O₂ = 4CO₂ + 2H₂O
m(CO₂)/{4M(CO₂)} = m(C₂H₂)/{2M(C₂H₂)}
m(CO₂)=2M(CO₂)m(C₂H₂)/M(C₂H₂)
m(CO₂)=2*44g/mol*38.9g/26g/mol = 131.7 g
131.7 grams of carbon dioxide would be formed
Answer: The mass of carbon dioxide produced in the given reaction is 132 grams.
Explanation:
To calculate the number of moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex] .....(1)
For ethyne:Given mass of ethyne = 38.9 g
Molar mass of ethyne = 26 g/mol
Putting values in equation 1, we get:
[tex]\text{Moles of ethyne}=\frac{38.9g}{26g/mol}=1.5mol[/tex]
The chemical reaction for the combustion of ethyne follows the equation:[tex]2C_2H_2+5O_2\rightarrow 4CO_2+2H_2O[/tex]
By Stoichiometry of the reaction:
2 moles of ethyne produces 4 moles of carbon dioxide.
So, 1.5 moles of ethyne will produce = [tex]\frac{4}{2}\times 1.5=3mol[/tex] of carbon dioxide.
Now, calculating the mass of carbon dioxide from equation 1, we get:Molar mass of carbon dioxide = 44 g/mol
Moles of carbon dioxide = 3 moles
Putting values in equation 1, we get:
[tex]3mol=\frac{\text{Mass of carbon dioxide}}{44g/mol}\\\\\text{Mass of carbon dioxide}=132g[/tex]
Hence, the mass of carbon dioxide produced in the given reaction is 132 grams.
Identify the location of the dorsal horn in the spinal cord
Answer:
The answer is location B
Explanation:
All spinal cord levels have a dorsal horn, which is made up of sensory nuclei that take in and interpret incoming somatosensory information. Ascending projections arise from there and carry the sensory data to the diencephalon and midbrain.
What is spinal cord ?A column of nerve fibers that extends from the skull base to the middle of the back. It has three thin membrane-like layers of protecting tissue covering it. The vertebrae encircle the spinal cord and its surrounding membranes.
At least some of the neurons in the superficial dorsal horn continue to be selective for the modalities represented by the primary afferent ends.
The dorsal horn, one of the spinal cord's divisions of grey matter, houses neurons that enter ascending sensory pathways as well as interneurons that link to other spinal cord cells. The substantial gelatinosa is present.
Thus, The initial relay for afferent impulses from the body's skin, muscles, and viscera is located in the dorsal horn of the spinal cord.
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