Question

How many liters are in 2.78x10^-3 moles of oxygen gas

Answer 1

The volume of oxygen gas is 0.062272L

Explanation:

Given information

`\text{The number of moles of oxygen gas = 2.78 }*10^(-3)\text{ moles}`

Recall that, at ST, 1 mole is equivalent to 22.4L

Let x represents the volume of oxygen

`\begin{gathered} 1\text{ mole }\rightarrow\text{ 22.4L} \\ 2.78\text{ }*10^(-3)\text{ }\rightarrow\text{ xL} \\ \text{cross multiply} \\ 1\text{ }*\text{ x = 22.4 }*\text{ 2.78 }*10^(-3) \\ x\text{ = 62.272 }*10^(-3) \\ x\text{ = 6.2272 }*10^(-2)L \end{gathered}`
`\text{Therefore, the volume of oxygen gas is 6.2272 }*10^(-2)L`

AN