Question

The molecular mass of magnesium is​

Answer 1

First you look up molar masses in a data book, periodic table, etc.

Write down the molar mass of each element. In this case:

Magnesium: 24.305 grams per mole

Chlorine: 35.45 grams per mole

Then write the chemical formula of magnesium chloride down. I assume you know how to determine chemical formulas of simple compounds.

MgCl2

To determine the molar mass multiply the molar mass of each element in the compound by the number of atoms of each element in the compound.

(24.305gmol^-1 x 1) + (35.45gmol^-1 x 2)

= 95.205 grams per mole.

Answer 2

Answer:

The molecular mass of magnesium is 24.305u