# Chem 1 markWatch

#1
How many protons are there in 6.0 g of nitrogen gas?
Avogadro constant, L = 6.022 x 1023 mol–1

The correct answer is 1.8 x 10^24

How i worked it out:
I worked out the moles of nitrogen gas by doing 6.0/28
Then I multiplied this number by Avo constant, L and I got 1.3 x10^23. But this is incorrect.

Does anyone know how?
Thanks
0
4 weeks ago
#2

So I did what you did first and the reason why it’s wrong is because you worked out the no. of ions/molecules/atoms - you didn’t work out Ar

6x6.022x10^23 = 3.6132x10^24

Then divide that answer by 2 (because there are 2 atoms in a molecule and you want to find the number of protons in 1 atom)
1
#3
Ohh thankss
(Original post by Orangeiswhite)

So I did what you did first and the reason why it’s wrong is because you worked out the no. of ions/molecules/atoms - you didn’t work out Ar

6x6.022x10^23 = 3.6132x10^24

Then divide that answer by 2 (because there are 2 atoms in a molecule and you want to find the number of protons in 1 atom)
0
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