Question

A gas was collected in a 10 L Cylinder under a pressure of 730 mm Hg and at 30C (temp) How many moles were in the cylinder?

Answer 1

`0.386 " mols"`

Explanation:

Here's what I would do

Recall `PV=nRT`

Solve for `n` which the number of mols:
`n=(PV)/(RT)`

Use temperature in Kelvin and
And at least one of the R constants should be given to you...

`n=((730mmHg)(10 L))/((62.4 (mmHgL)/(molK))(303K))= 0.386 " mols"`