# How many SO_2 molecules are there in 7.08 moles of SO_2?

1 mole is equivalent to Avogadro's number, ${N}_{A}$: $6.022 \times {10}^{23}$.
You have 7.08 mol; therefore you have approx. 42 $\times$ ${10}^{23}$ $S {O}_{2}$ molecules. Of course you can be more exact in your actual answer.