F.3 Chemical Principle 7th edition

Moderators: Chem_Mod, Chem_Admin

Ziyan Wang 3J
Posts: 51
Joined: Wed Sep 18, 2019 12:22 am

F.3 Chemical Principle 7th edition

Postby Ziyan Wang 3J » Thu Oct 03, 2019 4:45 pm

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

Kavya Immadisetty 2B
Posts: 106
Joined: Sat Aug 24, 2019 12:17 am
Been upvoted: 1 time

Re: F.3 Chemical Principle 7th edition

Postby Kavya Immadisetty 2B » Thu Oct 03, 2019 4:50 pm

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
Posts: 100
Joined: Thu Jul 25, 2019 12:15 am

Re: F.3 Chemical Principle 7th edition

Postby Julie Park 1G » Thu Oct 03, 2019 4:53 pm

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 =
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

Return to “Empirical & Molecular Formulas”

Who is online

Users browsing this forum: No registered users and 1 guest