Which of the following is true about the neutrons of an atom?A. The neutrons of an atom are the only subatomic particles that are involved in the interaction between two atoms.

B. The neutrons do not affect the mass or stability of an atom's nucleus, but they are involved in most interactions between two atoms.

C. The neutrons do not affect how the atom interacts with other atoms, but they do have an effect on the mass and stability of the nucleus.

Answers

Answer 1

Answer: I think the correct answer is C. Neutrons do not affect how atoms bond due to their neutral charge which makes it so that they don't affect the movement of electrons at all (chemical reactions occur when electrons are transferred/shared). Neutrons due however have a mass similar to that of a proton which means they contribute to the mass of the atom. Neutrons also effect the stability of the nucleas as shown in atoms that have radioactive isotopes. I hope this helps. Let me know if anything is unclear.

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What law determines that chemical equations must be balanced? What does this law say?

Answers

This is seen in the first law of Thermodynamics stating that matter and energy cannot be destroyed nor created.

Which half-reaction can occur at the anode in avoltaic cell?
(1) Ni2+ + 2e---> Ni (3) Zn--> Zn2+ + 2e-
(2) Sn + 2e---> Sn2+ (4) Fe3+--> Fe2+ + e-

Answers

The answer is (3). The reaction that can occur at the anode is oxidation reaction which will lose electrons. So (1) and (2) are not correct. For (4) Fe3+ can not lose electrons again.

The thirdreaction of the zinc-releasing electron and zinc ion will occur as the half-reaction at the anode of the voltaic cell. Thus, option 3 is the correct option.

What is a half-reaction?

A half-reaction is a depiction of the oxidation or the reduction half of a redox reaction that involves the stating of the oxidation states and the release or the absorption of the electrons.

The anode is an electrode of the voltaic cell where the oxidation reaction takes place. The oxidation results in the loss of the electrons and hence, reactions 1 and 2 cannot occur at the anode. The fourth reaction is also not possible as iron cannot lose its electron.

Therefore, option 3. Zn → Zn²⁺ + 2e⁻ will occur at the anode.

Learn more about anode and oxidation here:

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What is the molar mass of (NH₄)₃PO₄ in g/mol? A) 149.10 g/mol B) 113.01 g/mol C) 141.03 g/mol D) 61.99 g/mol

Answers

Answer: A) 149.10 g/mol

Explanation:

First, I list what I know, which are the molar masses of N, H, P, and O:

N = 14.01 g/mol
H = 1.01 g/mol
P = 30.97 g/mol
O = 15.99 g/mol

Now, I determine how many molecules of N, H, P, and O there are, starting with (NH₄)₃:

With just NH₄, there would be 1 N and 4 H, but since there are () around it with a subscript of 3, we multiply 3 by both N and H₄, so:

1*3 = 3 N
1*12 = 12 H

Now, we look at PO₄:

The subscript of 3 is before PO₄, so we do not apply that to PO₄:

1 P
4 O

Now, we know the molar masses and number of each of the elements, so we can determine the molar mass of the entire compound.

First, I calculate the total molar masses of each of the elements by multiplying the number of molecules of the element by the element's molar mass:

3 N = 3*14.01 g/mol = 42.03 g/mol
12 H = 12*1.01 g/mol = 12.12 g/mol
1 P = 1*30.97 g/mol = 30.97 g/mol
4 O = 4*15.99 g/mol = 63.96 g/mol

Then, I calculate the total molar mass of the compound by adding the total molar masses of each of the elements together:

42.03 + 12.12 + 30.97 + 63.96 = 149.08 g/mol

I probably used slightly different approximations of the molar masses of each element, but my answer is closest to choice A) 149.10 g/mol.

So, if there are no () around a compound, like PO₄, the subscript only applies to the element it's attached to, so there are 4 molecules of O and only 1 molecule of P.

If there are () around a compound with a subscript, like (NH₄)₃, the subscript after the () gets applied to each element inside the ().

I hope this helps! :)

Final answer:

The molar mass of the compound (NH₄)₃PO₄ is calculated by adding up the molar masses of all its constituent elements. The calculated molar mass is approximately 149.09 g/mol, which corresponds to answer choice (A) 149.10 g/mol.

Explanation:

To calculate the molar mass of a compound, you multiply the quantity of each element by its atomic mass and then sum them all up. The formula (NH₄)₃PO₄ contains Nitrogen (N), Hydrogen (H), Phosphorous (P), and Oxygen (O). The atomic masses of these elements are approximately 14.01 g/mol, 1.01 g/mol, 30.97 g/mol, and 16.00 g/mol respectively. So for the compound (NH₄)ᵣPO₄, the molar mass would be as follows:

(3*N) + (12*H) + (1*P) + (4*O) = (3*14.01) + (12*1.01) + 30.97 + (4*16.00) = 149.09 g/mol approximately

Therefore, the closest answer choice to the correct molar mass is (A) 149.10 g/mol.