Question

Calculate the number of molecules in 6.4 g of O2

Answer 1

Explanation:

Here he has asked that 6.4 g of O2 contains how many molecules

First 1mol of O2= 32g

The 6.4g of O2=?

32g of O2-----1mol

6.4g of O2-----?

$\times 6.4 \times 1 \div 32 \\ 64 \div 10 \div 32 \\ = 0.2mol$

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