Answer : The number of atoms present are, 

Explanation : Given,
Moles of 
 = 0.35 mole
 = 0.35 mole
As we know that, 1 mole of substance contains 
 number of atoms.
 number of atoms.
In 
 , there 1 atom of carbon and 2 atoms of oxygen. So, the total number of atoms in
, there 1 atom of carbon and 2 atoms of oxygen. So, the total number of atoms in 
 are, 3.
 are, 3.
As, 1 mole of 
 contains
 contains 
 number of atoms.
 number of atoms.
So, 0.35 mole of 
 contains
 contains 
 number of atoms.
 number of atoms.
Therefore, the number of atoms present are, 
