MCQ : The number of gram molecules of oxygen is 6.02 × 10^24 Co molecule is

Question

The number of gram molecules of oxygen is 6.02 × 10²⁴ CO molecule is –

1. 8 g molecules
2. 5 g molecules
3. 2 g molecules
4. 0.5 g molecules

Answer

(b) 5 g molecules

Explanation

Number of moles = Number of molecules / Avogadro’s number

Number of moles of CO = 6.02 × 10²⁴ / 6.02 × 10²³ = 10

Number of moles of O2 = 0.5 × Number of moles of oxygen atoms

Number of moles of O2 = 0.5 × 10 moles = 5 moles

So, 6.02 × 10^24 CO molecules is equivalent to 5 gram molecules of oxygen.