Question #a3fcc

1 Answer
David G.
Feb 6, 2018

The mass of #4.35xx10^25# #N_2# molecules is #2024# #g#.

Explanation:

Nitrogen atoms have a molar mass of #14# #gmol^-1#.

The #N_2# molecule has 2 atoms, so it has twice that mass, #28# #gmol^-1#.

That means that one mole, Avogadro's number, #6.02xx10^3#, of #N_2# molecules would have a mass of #28 #g#.

To find our answer, then, we calculate:

#(4.35xx10^25)/(6.02xx10^23)xx28=2024# #g#

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