Question

Dana wants to determine the molar mass of magnesium hydroxide, Mg(OH)2. Which calculation should she use?

(atomic number of Mg) + (2 x atomic number of O) + (2 x atomic number of H)

2 x (atomic number of Mg + atomic number of O + atomic number of H)

(molar mass of Mg) + (2 x molar mass of O) + (2 x molar mass of H)

2 x (molar mass of Mg + molar mass of O + molar mass of H)

Answer 1

Molar mass of Mg + 2xmolar mass of O + 2x molar mass of H