Question

If 0.25gm of a substance when vaporized displaced 50 cm cube of air at STP the gram molecular mass of the substance will be

Answer 1

Answer : The gram molecular mass of the substance will be, 112 grams

Explanation : Given,

Mass of substance = 0.25 g

Volume displaced by substance = $50cm^3=0.05L$

conversion used : $1cm^3=0.001L$

Now we have to calculate the gram molecular mass of the substance.

As, 0.05 L volume displaced by 0.25 grams of substance

So at STP, 22.4 L volume displaced by $\frac{0.25}{0.05}\times 22.4=112g$ of substance

Therefore, the gram molecular mass of the substance will be, 112 grams