Question

What volume is expressed by a `1*g` mass of oxygen gas under standard conditions?

Answer 1

We know that the molar volume of an Ideal Gas at `"STP"` (check the definition!) is `22.7*L*mol^-1`...we gets a bit over `1*L`

Explanation:

We then have to find the molar quantity of dioxygen gas. Now it is a fact that ALL the elemental gases (save the Noble gases) are diatomic....i.e. `H_2, N_2, O_2, F_2.........`

And so we work out the product......

`"moles of gas"xx"molar volume......"`

`=(1.6*g)/(32.00*g*mol^-1)xx22.7*dm^3*mol^-1~=1*L`.