Question

the gm of introgen is 14 grams find out the following
A)-number of moles of atoms in 70 grams of introgen
B)-number of moles of molecules in 70 grams of nitrogen
C)-number of moles atoms in 70 introgen ​

Answer 1

Given,

Gram Molecular Mass of N = 14 g

Gram Molecular Mass of N₂ = 28 g

No. of atoms = 6.022*10²³ = No. of Molecules

A. Given Mass of N₂ = 70 g

Moles = 70/28

= 2.5

But N₂ has 2 atoms,

No. of atoms in 70 g of N₂ = (6.022*2.5*2)*10²³

= 30.11*10²³

B. Moles = 2.5

No. of molecules in 70 g of N₂ = (2.5*6.022)*10²³

= 15.055*10²³

I hope this helps.