# What is the molar mass of Al(NO_3)_3?

Jun 6, 2018

Surely you can use the interwebz….?

#### Explanation:

I gets $\text{formula mass of aluminum nitrate} \equiv 213 \cdot g \cdot m o {l}^{-} 1$.

But how did I get that mass? I looked at the Periodic Table in front of me, which tells me that molar masses of $A l$, $N$, and $O$ are $27.0 \cdot g \cdot m o {l}^{-} 1$, $14.01 \cdot g \cdot m o {l}^{-} 1$, $16.0 \cdot g \cdot m o {l}^{-} 1$ respectively...and I added these together appropriately...

{27.0+3xx14.01+9xx16}*g*mol^-1-=??*g*mol^-1

Jun 6, 2018

Molar mass: 213.01

#### Explanation:

Molar mass of a compound can be found by finding a periodic table and looking at the atomic mass of each element that is in the compound

Aluminium - 26.98
Nitrogen - 14.01
Oxygen - 16

$A l {\left(N {O}_{3}\right)}_{3} = 26.98 + 3 \times \left(14.01 + 16 \times 3\right) = 213.01$