Question

Determine the number of moles of oxygen atoms in each of the following.
1) 4.93 mol H2O2
2) 2.01 mol N2O

Answer 1

Answer :

Part 1: 4.93 moles of $H_2O_2$ contains 9.86 moles of oxygen atoms.

Part 2: 2.01 moles of $N_2O$ contains 2.01 moles of oxygen atoms.

Explanation :

Part 1: 4.93 mol $H_2O_2$

In 1 mole of $H_2O_2$, there are 2 atoms of hydrogen and 2 atoms of oxygen.

As, 1 mole of $H_2O_2$ contains 2 moles of oxygen atoms.

So, 4.93 moles of $H_2O_2$ contains $4.93\times 2=9.86$ moles of oxygen atoms.

Thus, 4.93 moles of $H_2O_2$ contains 9.86 moles of oxygen atoms.

Part 2: 2.01 mol $N_2O$

In 1 mole of $N_2O$, there are 2 atoms of nitrogen and 1 atom of oxygen.

As, 1 mole of $N_2O$ contains 1 mole of oxygen atoms.

So, 2.01 moles of $N_2O$ contains $2.01\times 1=2.01$ moles of oxygen atoms.

Thus, 2.01 moles of $N_2O$ contains 2.01 moles of oxygen atoms.