Question

What volume is expressed by a mass of `0.50*g` of oxygen gas at `"STP"`?

Answer 1

Well, the `"molar volume at STP"` is `22.4*L*mol^-1`. I make it approx. `400*mL`.

Explanation:

And so we work out the molar quantity of dioxygen gas......(and most of the elemental gases are binuclear) and calculate the volume..

`"Volume"=(0.50*cancelg)/(32.00*cancelg*cancel(mol^-1))xx22.4*L*cancel(mol^-1)=??*L`