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Stells [14]
2 years ago
14

Please Need help asap

Chemistry
1 answer:
ruslelena [56]2 years ago
4 0

Answer:

A

Explanation:

The number of protons and neutrons of an element is the same. the electrons are the only thing that can differ.  The atomic number equal the protons and neutrons.

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The partial pressure of O2 in air at sea level is 0.21atm. The solubility of O2 in water at 20∘C, with 1 atm O2 pressure is 1.38
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Answer:

1.21x10^{-3} M

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