Question

The number of moles of chloride ions in 250ml of 4.00 M MgCl2 is?

Answer 1

so first you need to find out the moles of magnesium chloride, which is going to be your molarity times the volume in liters. Then, you need to determine how many chloride ions are there per magnesium chloride molecule, and use dimensional analysis to find your answer.

Answer 2

what is dimensional analysis?

Answer 3

and then the moles of MgCl is 1

Answer 4

then what do I do from here?