Question

1. 22.4 liters of hydrogen gas is taken in a cylinder at stp.
a) what will be its mass ?
b) how many molecules are there in it?​

Answer 1

Answer:

moles of H2 gas = 22.4/22.4

= 1 mol

moles = Given mass / Molar mass

1 = mass / 2 g

mass = 2g

moles = No. of molecules / Avogadro no.

1 = molecules / 6.022 × 10^23

molecules = 6.022 × 10^23

Answer 2

Explanation:

a) it's mass will be 2grams

because H2 is a molecule and one molecule mass of Hydrogen will be constant ie 2g

b) only one