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viva [34]
3 years ago
9

An atom has a mass number of 24 and 13 neutrons. What is the atomic number of this atom? Express

Chemistry
1 answer:
Temka [501]3 years ago
8 0
A=mass number   (protons + neutrons)
Z=atomic number  (protons)
N=number of neutrons.

A=Z+N

Data:
A=24
N=13

Therefore:
24=Z+13
Z=24-13=11

Answer: The atomic number of this atom is 11. (The element is sodium)
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Metals react with oxygen to give oxides with the general formula MxOy. What is a balanced chemical equation for the reaction of
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Answer: 4Fe+3O_2\rightarrow 2Fe_2O_3

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Answer:

d. The gold(III) ion is most easily reduced.

Explanation:

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Au³⁺ + 3e⁻ ⟶ Au;   1.50 V

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Zn²⁺ + 2e⁻ ⟶ Zn; -0.76 V

Na⁺ + e⁻     ⟶ Na; -2.71 V

A <em>more positive voltage</em> means that there is a <em>stronger driving force</em> for the reaction.

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Au³⁺ is most easily reduced.

4 0
3 years ago
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