Question

Atomic mass of oxygen is 16. The number of moles in 4.8g ozone is

Answer 1

1 mole of ozone contains 48 grams 
4.8 grams contains     ?
4.8/48 = 0.1 mole

Answer 2

Answer: 0.1 moles

Explanation: To calculate the number of moles, we use the equation:

$\text{Number of Moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Molar mass of ozone $(O_3)=3\times {\text {atomic mass of oxygen}}=3\times 16=48 g$

given mass= 4.8 g

Putting the values in above equation, we get:  

$\text{Number of Moles}=\frac{4.8g}{48g/mol}=0.1 moles$