Question

Write the formula of each compound, and determine its molecular (formula) mass:

Answer 1

the molecular mass of the magnesium nitrite trihydrate will be 170.3 g/mol and the formula for the magnesium nitrite trihydrate will be $Mg(NO_{2})_{2} 3H_{2} O$.

A molecule's molecular formula reveals which atoms and the number of each kind are included within it. No subscript will be used if there is just one atom of a certain kind. A subscript is added to the symbol for an atom if it contains two or more atoms of a certain type of atom.

Calculation of the molecular mass as:

Molar mass of Magnesium(Mg) = 24.3 g/mol

Molar mass of nitrogen(N) = 14 g/mol

Molar mass of hydrogen(H) = 1 g/mol

Molar mass of oxygen (O)= 16 g/mol

So, the molecular mass of the magnesium nitrite trihydrate will be (24.3×1) + (14×2) + (16×7) + (1×6)= 170.3 g/mol

Therefore, the molecular mass of the magnesium nitrite trihydrate will be 170.3 g/mol.

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