Stuck on chemistry homework problem

Question

How many moles of magnesium bromide would you need to add to 65 mL of water to make a 1.5 M solution?

Answer 1

A 1.5 M solution means there the 1.5 moles of MgBr₂ (magnesium bromide) per liter of water. Set up a proportion:

then cross multiply to solve for "x"