# What is the mass in grams of 7.20 mol of antimony?

Feb 4, 2016

$1$ $m o l$ of antimony has a mass of $121.76$. If there are $7.20$ mol, then...........?

#### Explanation:

$S b$ has an atomic mass of $121.76$ $g \cdot m o {l}^{-} 1$.

If there are $7$ $\text{moles}$, then $7$ $\cancel{\text{mol}}$ $\times$ $121.76$ $g \cdot \cancel{m o {l}^{-} 1}$$=$ ?? $m o l$.

Feb 4, 2016

$876.6 g$

#### Explanation:

From the periodic table, the molar mass of Sb is $121.75 g / m o l$.

Since $n = \frac{m}{{M}_{r}}$, we can conclude that

$m = n \times {M}_{r}$

$= 7.20 \times 121.75$

$= 876.6 g$