Question

What is the molecular mass of magnesium hydroxide?

Answer 1

Step1. Molecular mass

• Molecular mass or molecular weight is the mass of a molecule.
• It is calculated as the sum of the atomic mass of each constituent element multiplied by the number of atoms of that element in the molecular formula.

Step2. The formula for molecular mass of Magnesium hydroxide

• The molecular formula of Magnesium hydroxide is $\mathrm{Mg}{\left(\mathrm{OH}\right)}_2$
• The molecular mass of Magnesium hydroxide =$\mathrm{Atomic}\mathrm{mass}\mathrm{of}\mathrm{Mg}+2\left(\mathrm{Atomic}\mathrm{mass}\mathrm{of}\mathrm{O}+\mathrm{Atomic}\mathrm{mass}\mathrm{of}\mathrm{H}\right)$

Step3.Calculation of molecular mass of Magnesium hydroxide

The molecular mass of Magnesium hydroxide=$24.31+2\left(16.00+1.0079\right)\mathrm{u}$

=$58.32\text{u}$

Hence, the molecular mass of Magnesium hydroxide is $58.32\text{u}$.