how many grams of Mg combine with 1.50 g of Cl ions in MgCl2 ?

Answer 1

balance the equation. Figure the moles of Cl2

Then, how many moles do you need to react with that number of moles of Cl2

Answer 2

Convert 1.50 g Cl ions to moles.
moles = grams/atomic mass = ??
moles Mg = moles Cl x 1/2 = ??
g Mg = moles Mg x atomic mass Mg.