What is the mass of 5.50 moles of magnesium chloride, MgCl2?

522.5g

Explanation:

First, we'll begin by calculating the molar mass of MgCl2.

This is illustrated below:

Molar Mass of MgCl2 = 24 + (2x35.5) = 24 + 71 = 95g/mol

Mole of MgCl2 obtained from the question = 5.50 moles

Mass of MgCl2 = ?

Mass = number of mole x molar Mass

Mass of MgCl2 = 5.50 x 95

Mass of MgCl2 = 522.5g

Therefore, the mass of 5.50 moles of magnesium chloride, MgCl2 is 522.5g

523.66g or 524g for proper sig figs

Explanation:

First you have to get the molar mass of MgCl2 which is 95.211g/mol. You can calculate this through added the atomic mass of one magesium atom and 2 chloride atoms. You then multiply the 5.50mol by the 95.211g/mol and that cancels out the unit of moles leaving only grams.