Question

At stp what is the volume of 7g nitrogen gas ?

Answer 1

Molar gas volume at stp is :

1 mole = 22400cm³

Moles of Nitrogen gas in 7g is :

Moles = mass / molar mass

Molar mass of Nitrogen is : 14 × 2 = 28

Moles = 7/28 = 0.25 moles

The volume is :

22400 × 0.25 = 5600cm³

This equals to 5600/1000 = 5.6 litres