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Answer:

1.89 V

Explanation:

To calculate the standard cell potential, subtract the reduction potential of the anode from the reduction potential of the cathode.

So for your calculation,

-0.22 V - (-2.11 V)= 1.89 V

In the voltaic cell, current is produced by a  sponteanous chemical reaction. The standard cell potential here is 1.89 V.

A voltaic cell is a cell that produces current by a sponteanous chemical reaction. We are told here that X is the anode and Y is the cathode.

Now;

E°cell = E°cathode - E°anode

E°cell = (−0.22 V) - (−2.11 V) = 1.89 V

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Answer:

Option D. G

Explanation:

In the energy profile diagram, the difference in the energy between reactant and product is called enthalphy Change (ΔH).

Mathematically, the enthalpy change (ΔH) is represented as:

Enthalpy change (ΔH) = Heat of product (Hₚ) – Heat of reactant (Hᵣ)

ΔH = Hₚ – Hᵣ

Considering the diagram given in question above, the difference in the energy of product and reactant is indicated by the letter G

Thus, option D gives the correct answer to the question.

Answer:

Chemical reactions, chemistry, science as inquiry and data analysis. ... Students burn steel wool in both an open and closed environment to understand ... The difference in mass for this small sample of steel wool will be very small. ... careful attention to the balloon! 9. When rusting occurs the properties of the metal changes.

Explanation:

Answer:

224g

Explanation:

Molar mass of h2so4:

1.008x2+32.06+16.00x4=98.08g/mol

2.28 x 98.08=224g

Answer:

Add more H2O

Explanation:

Answer: I think A is right

Explanation: Photosynthesis needs light so it is endothermic,

Oxygen in water is oxidised and Oxygen is released in process.

Free energy is temperature dependent. But also Carbo dioxide

involves reaction. You needs to find out Calvin-Benson cycle

Answer: 1.72

Explanation:

Answer:

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Explanation:

Answer:

The specific heat is 0.25J/g°C

Explanation:

To solve this question we must know that the heat released for the metal is equal to the heat absorbed for the water. The equation is:

S(Metal)*m(Metal)*ΔT(metal) = S(water)*m(water)*ΔT(water)

Where S of metal is our incognite (Specific heat of metal)

m is the mass of the metal = 565g

ΔT is change in heat of the metal = 90.00°C - 34.40°C = 55.60°C

Specific heat of water = 4.18J/g°C

The mass of water = 200.0g

ΔT of water is 34.40°C - 25.00°C = 9.40°C

Replacing:

S(Metal)*565g*55.60°C = 4.18J/g°C*200.0g*9.40°C

S(metal) = 0.25J/g°C

Answer: Calcium

Explanation: an element need to reduce Iron in reaction.

Calcium is only metal in list which can reduce Iron

Answer:

Maybe c?

Explanation:

John Dalton was an English chemist, and Marie Curie was a physicist and chemist. The ideas of John Dalton and Marie Curie were based on scientifically gathered evidence. Thus, option C is correct.

John Dalton and Marie Curie are famous physicists and chemists. John Dalton is most known for introducing the theory of the atom and color blindness. He gave the theory of atomism based on the experimental setup.

Marie curie hugely contributed to the discovery of radioactivity and cancer research. She and her husband experimented and searched for the radioactive material.

Aristotle was a philosopher and established the relation between the various fields of sciences. He originated the idea of Alchemy by combining the four elements.

Therefore, John Dalton and Marie Curie proposed ideas based on research.

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Answer:

1.50 mol N₂

Explanation:

Step 1: Write the balanced equation

2 NH₃(g) + 3 CuO(s) ⇒ 3 Cu + 3 H₂O(I) + N₂(g)

Step 2: Calculate the moles corresponding to 51.0 g of NH₃

The molar mass of NH₃ is 17.03 g/mol.

51.0 g × 1 mol/17.03 g = 2.99 mol

Step 3: Calculate the moles of N₂ produced from 2.99 moles of NH₃

The molar ratio of  NH₃ to N₂is 2:1. The moles of N₂ produced are:

2.99 mol NH₃ × 1 mol N₂/2 mol NH₃ = 1.50 mol N₂

Answer:

minimum energy required to to remove the most loosely bound election of an isolated gaseous atom.

Explanation:

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Answer:

capillaries

Explanation:

hope it helps if I'm not tell me right away.

Answer:

Carotid artery, Jugular veins

The chambers are explained below.

Explanation:

THE BLOOD VESSELS

The carotid artery carries red blood (oxygenated) to the head and the neck region and that obviously include the brain via the aorta. To be precise the internal carotid artery supplies oxygenated red blood cells to brain. The jugular veins carry deoxygenated red blood cells from the head back to the heart via the superior vena cava. The most important function of the jugular vein is to drain deoxygenated blood from brain.

THE CHAMBERS

The left atrium receives oxygenated blood from the lungs and pumps it to the left ventricle which also pumps the same oxygenated blood to the rest of the body through the aortic valve (aorta).

The right atrium receives deoxygenated blood from the body via the vena cava  and pumps the deoxygenated blood to the right ventricle which pumps the deoxygenated blood to be oxygenated by the lungs via the pulmonary valve (pulmonary artery).

CONCLUSION

The oxygenated red blood cells from the lung pass through the pulmonary vein through the left atrium to the left ventricle through the carotid artery (internal carotid artery) via the aorta to the brain and

The deoxygenated red blood cells in the brain are drained through the jugular vein via the superior vena cava to the right atrium, which pumps the deoxygenated blood to the right ventricle. From here the deoxygenated blood is pumped to the lungs via the pulmonary artery for oxygenation.

This is my answer, thus if I got your question right.

Answer:

Explanation:

105.9888 g/mol

Answer:

105.9888 g/mol

Explanation:

You will add both the molar mass of each element multiply by the number of atoms present.

Answer:

If you ever wonder why nails rust, it's because rusting happens when a metal is exposed to oxygen. The molecules of iron on the surface of the nail exchange atoms with the oxygen in the air and produce a new substance, the reddish-brown ferrous oxide, a.k.a. rust.

Explanation:

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Answer:

the sun's Rays strike Earth surface most directly at the Equator this focuses the race on a small area because be raised hit more directly the area is heated more

Explanation:

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Answer:

2,4,6–trimethylheptanal

Explanation:

To name the compound given, we must first obtain the following:

1. Determine the functional group of the compound.

2. Determine the longest continuous carbon chain. This gives the parent name of the compound.

3. Identify the substituent group attached to the compound.

4. Locate the position of the substituent group.

5. Combine the above to obtain the name of the compound.

Now, we shall name the compound as follow:

1. The functional group of the compound is –CHO. Thus, the compound is an alkanal.

2. The longest continuous carbon chain is 7. Thus, the parent of the compound is heptanal.

3. The substituent group attached to the compound is methyl (–CH₃).

NOTE: There are 3 methyl groups attached to the compound.

4. The methyl groups attached to compound are located at carbon 2, 4 and 6.

5. Therefore, the name of the compound is:

2,4,6–trimethylheptanal

Answer: 30.08 g/mol

Explanation:

C2= 12.01 H6=1.01

12.01(2) + 1.01(6) =

24.02 + 6.06 =

30.08 g/mol

Answer:

D.

Explanation:

NH3 (Ammonia) is a water soluble gas, and is polar. While C6H14 is non-polar and does not mix with water soluble.

Answer:

On returning to lowest energy state which is stable, it releases energy in the form of light. Hence, option A that is the electron releases energy in the form of light on falling to lower energy state from excite state.

Answer:

NaOCl + H2O → HOCl + NaOH

so the mole fraction is = moles of NaOCl/(moles of NaOCl+moles of H2O)

so for 1.35 NaOCl it will require 1.35 moleof H2O

mole fraction = 1.35/(1.35+1.35)

mole fraction = 1/2 =0.5

is it correct i d ek but i tried :)

The mole fraction of the NaOCl is 0.0237

We'll begin by calculating the mole of solute (NaOCl) in the solution.

Mole = Molality x mass (Kg) of water

Mole of NaOCl = 1.35 × 1

Mole of NaOCl = 1.35 mole

Next, we shall determine the mole of water.

Mole = mass / molar mass

Mole of water = 1000 / 18.01

Mole of water = 55.52 moles

Finally, we shall determine the mole fraction of NaOCl.

Mole fraction = mole / total mole

Mole fraction of NaOCl = 1.35 / 56.87

Mole fraction of NaOCl = 0.0237

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Answer:

Monosaccharide

Explanation:

Apples contain high levels of fructose, which is a monosaccharide.

Answer:

Electrons get farther from the nucleus.

Explanation:

By going from the top to the bottom of a group, the atomic number increases. That would mean that:

Ionization energy decreases down the group because electrons get farther from the nucleus hence they are easier to remove.

Ionization energy refers to the energy required to remove an electron from  an atom. The ionization energy is a periodic trend that decreases down the group but increases across the period.

The ionization energy decreases down the group because electrons get farther from the nucleus hence they are easier to remove.

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Answer: daughter nucleus is Oxygen-17

Explanation: electron and proton form a neutron in nucleus.

Mass number remains same and number of proton decreases.

Fluorine -17 isotope undergoes nuclear decay by electron capture results in the formation of the oxygen-17 nuclei and one neutron as written below:

[tex]\rm _{9}^{17}F + _{-1}^{0}e \rightarrow _{9}^{1 7}O + _{0}^{1}n[/tex]

Unstable radioactive isotopes of some elements undergoes breaking their nuclei by emitting or absorbing some charged particles such as alpha or beta.

Alpha decay result in the emission of one helium  nuclei where, the mass number reduces by 4 units and atomic number by 2. In beta decay mass umber does not change but atomic number increases by one.

The process of electron capture, is the bombardment of an electron into the unstable nucelli result where the atomic number reduces by one. Therefore, fluorine converts to oxygen -17 by electron capture where the latter isotope is stable one.

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Your question is incomplete. But your complete question probably was:

Fluorine-17 nuclide radioactively decays by electron capture. Write a balanced nuclear chemical equation that describes this process.

Answer:

it is b

Explanation:

b is the quarks for a proton

Answer:

B

Explanation:

Answer:

the hypothesis is false

Explanation:

it I rejected because the hypothesis has been tested severally and the answer still proves to be wrong

Answer:

probably the third option: The hypothesis is false

Explanation:

Answer:

which states that matter cannot be created or destroyed. Therefore, there must be the same number of atoms of each element on each side of a chemical equation.

Explanation: