Chapter 7.1, Problem 7.4PP

Calculate each of the following:

a. number of Li atoms in 4.5 moles of Li
b. number of ${\text{CO}}_{\text{2}}$ molecules in 0.0180 mole of ${\text{CO}}_{\text{2}}$c. moles of Cu in $\text{7}{\text{.8×10}}^{\text{21}}$atoms of Cu
d. moles of ${\text{C}}_{\text{2}}{\text{H}}_{\text{6}}$ in $3.75\times {10}^{23}$ molecules of ${\text{C}}_{\text{2}}{\text{H}}_{\text{6}}$