Question

How many moles of oxygen atoms are present in one mole of the following compounds $\mathbf{\left(}{\mathbf{Cl}}_{\mathbf{2}}{\mathbf{O}}_{\mathbf{7}}\mathbf{\right)}$?

Answer 1

Calculate the number of moles of oxygen in $\mathbf{\left(}{\mathbf{Cl}}_{\mathbf{2}}{\mathbf{O}}_{\mathbf{7}}\mathbf{\right)}$:

From the molecular formula $\left({\mathrm{Cl}}_2{\mathrm{O}}_7\right)$,

$1$ mole of $\left({\mathrm{Cl}}_2{\mathrm{O}}_7\right)$ = $7$ moles of oxygen atoms

Thus one mole of $\left({\mathrm{Cl}}_2{\mathrm{O}}_7\right)$ contains $\mathbf{7}$ moles of oxygen atoms.