Question

Molar mass of Mg(CO3)

Answer 1

`\boxed {\boxed {\sf 84.313 \ g/mol}}`

Step-by-step explanation:

The molar mass is the mass per mole of an element or substance. The values for atomic mass on the Periodic Table are used as the molar mass. Look up the molar masses for the elements in the formula.

• Mg: 24.305 g/mol
• C: 12.011 g/mol
• O: 15.999 g/mol

Analyze the formula. Magnesium and carbon have no subscript, so there is only one atom of each. Oxygen has a subscript of 3, so there are 3 atoms and the mass has to be multiplied by 3.

• MgCO₃= 24.305 + 12.011+ 3(15.999)
• MgCO₃= 24.305+12.011+47.997=84.313 g/mol

The molar mass of magnesium carbonate is 84.313 grams per mole.