Question

How many moles of oxygen atoms have a mass equal to the mass of a glass of water? A glass of water has 0.50kg

Answer 1

Approx. `16*mol`

Explanation:

Well `O_2(g)` has a molar mass of `32.0*g*mol^-1`.

And so we take the quotient....

`n_"dioxygen"=(0.50*kgxx10^3*g*kg^-1)/(32.0*g*mol^-1)=15.625*mol`