Question
The number of gram molecules of oxygen is 6.02 × 1024 CO molecule is –
- 8 g molecules
- 5 g molecules
- 2 g molecules
- 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.