## F.3 Chemical Principle 7th edition

Ziyan Wang 3J
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Joined: Wed Sep 18, 2019 12:22 am

### F.3 Chemical Principle 7th edition

(a) Write the formula for nitric acid. (b) Without doing a calculation, estimate which element in nitric acid occurs with the greater mass percentage.

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### Re: F.3 Chemical Principle 7th edition

a) HNO3
b) Oxygen. Hydrogen is approx 1 amu, nitrogen is approx 14 amu, and oxygen is approx 16 amu. Since there are 3 oxygen, it will have a higher mass percent.

Julie Park 1G
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Joined: Thu Jul 25, 2019 12:15 am

### Re: F.3 Chemical Principle 7th edition

For this question, you'll probably have to have known the formula for nitric acid beforehand.
Nitric acid is one of the seven strong acids.

a. Nitric acid = $HNO_{3}$
b. While knowing that...
H = 1.008 grams/mol
N = 14.01 grams/mol
O = 16.00 grams/mol
you can estimate that O has the greatest mass percentage since it has the highest atomic mass and because there are three atoms of O (16x3=total of 48g) in $HNO_{3}$