Question

46. 2057 Q.No. 5 16 g of a gas at STP occupies 5.6 litre. What is the molecular mass of the gas? [2] Ans: 64 amu​

Answer 1

Answer:

1mole gas occupies 22.4L of volume at STP.

∴5.6 litre of gas=

5.6

22.4

moles

⟹5.6 litre of gas indicates 0.25 moles of gas.

Given that,

0.25moles of gas weights 22g.

⟹1mole of gas weight 22×4=88g

Hence, molecular weight of gas 88g.