# What is the mass of 3.45 moles of NH_4NO_3?

##### 2 Answers
Dec 31, 2016

Shouldn't you tell us this?

#### Explanation:

The molar masses of hydrogen, nitrogen, and oxygen, are $1.00794 , 14.01 ,$ and $15.999 \cdot g \cdot m o {l}^{-} 1$ respectively. Sum these masses appropriately, multiply by 3.45, and report back if you're still unsure.

Dec 31, 2016

The mass of 3.45 moles $\text{NH"_4"NO"_3}$ is 276 g.

#### Explanation:

First determine the molar mass of ammonium nitrate, $\text{NH"_4"NO"_3}$. Then multiply the given moles ammonium nitrate by its molar mass.

Molar mass $\text{NH"_4"NO"_3} :$$\text{80.043 g/mol}$
https://www.ncbi.nlm.nih.gov/pccompound/?term=ammonium+nitrate

(3.45cancel"mol NH"_4"NO"_3)xx(80.043"g NH"_4"NO"_3)/(1cancel"mol NH"_4"NO"_3)="276 g NH"_4"NO"_3" rounded to three significant figure