What are the number of moles of CO2 which contains 16 g of oxygen?

1. 

What are the number of moles of CO2 which contains 16 g of oxygen?
[A]. 0.5 mole
[B]. 0.2 mole
[C]. 0.4 mole
[D]. 0.25 mole

Answer: Option A

Explanation:

One mole of CO2 has mass of 44 g and 32 g of O2. So 16 g of O2 have 22 g of CO2 or 0.5 moles of it.

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