Question

What is the formula weight of magnesium nitrate, mg(no3)2? express your answer to four significant figures and include the appropriate units?

Answer 1

The formula weight of a compound is simply equal to the total molar mass.

The molar mass of each elements are:

Mg = 24.305 g/mol

N = 14.0067 g/mol

O = 15.999 g/mol

So the total molar mass is:

formula weight = 24.305 + 2 (14.0067) + 6 (15.999)

formula weight = 148.3 g/mol