Question

Calculate the gram molecular mass of N2, if 360 cm³ at S.T.P
Weighs 0.45g.​

Answer 1

Answer:

28.0166gm

Explanation:

Now, density= d= mass/Volume= (0.45gm

$.45gm \div (360 \div 1000)lit$

=1.25gm/litre

Now, Using Idea gas equation

PM = dRT

At STP,

P=1atm

T=273K

R = 0.0821 litre×atm ÷(mol×K)

1×M= 1.25×0.0821×273

M=28.0166gm