Question

calculate the number of oxygen atoms in the following compound
a). 20g of CaCO3
b). 10 moles of CaCO3​

Answer 1

0.2 moles

Explanation:

Caco3

atomic mass 40+12+3×16=100

moles = gram weight/atomic mass

20/100 ( it is already given)

so, therefore your answer is 0.2 moles

hope it helped you