## What is the molar mass of calcium nitrate \(\mathrm{Ca}\left(\mathrm{NO}_{3}\right)_{2} ?\)

Answer:

\(164.086 \mathrm{~g} / \mathrm{mol}\) is the molar mass of calcium nitrate, \(\mathrm{Ca}\left(\mathrm{NO}_{3}\right)_{2}\)

Explanation:

The molar mass of \(\mathrm{Ca}\left(\mathrm{NO}_{3}\right)_{2}\) is calculated by multiplying the molar mass of each element by its subscript (remember to multiply the subscripts for \(\mathrm{NO}_{3} \text { by } 2\)) and adding the results. The molar mass of an element is its atomic weight on the periodic table in grams/mole, or g/mol.

\(\text { Molar mass Ca: }\)

\(\begin{aligned}

&(1 \times 40.078 \mathrm{~g} / \mathrm{mol} \mathrm{Ca})+(2 \times 14.007 \mathrm{~g} / \mathrm{mol} \mathrm{N})+(6 \times 15.999 \mathrm{~g} \mathrm{O}) \\

&=164.086 \mathrm{~g} / \mathrm{mol}

\end{aligned}\)