How many moles of ions are there in of ?

CHEMISTRY · Single correct · A Level · Chemistry · Amount of substance · Amount of substance

Problem

How many moles of

\mathrm{Cl^-}

ions are there in

9.5\ \mathrm{g}

\mathrm{MgCl_2}

? (1) 0.1 mol (2) 0.2 mol (3) 0.3 mol (4) 0.4 mol