# What is the mass of .50 moles of chromium(II) oxide?

Mar 13, 2017

The mass of 0.50 mol of chromium(II) oxide is 34 g.

#### Explanation:

The formula of chromium(II) oxide is $\text{CrO}$.

Thus, the mass of one mole of $\text{CrO}$ is $\text{(52.00 + 16.00) g" = "68.00 g}$

∴ The mass of 0.50 mol of $\text{CrO}$ is

0.50 color(red)(cancel(color(black)("mol CrO"))) × "68.00 g"/(1 color(red)(cancel(color(black)("mol CrO")))) = "34 g"