What mass of CH4 has a volume of 33.4 L? The molar mass of methane can
be approximated to 1 decimal place.

23.8g

Explanation:

1 mole of any gas contains 22.4L at stp.

This means that 1mole of CH4 also occupy 22.4L.

Now if 1mole of CH4 occupy 22.4L,

Then, xmol of CH4 will occupy 33.4L i.e

Xmol of CH4 = 33.4/22.4 = 1.49mole

Now, we can easily find the mass of CH4 by converting 1.49mole of CH4 to grams. This is illustrated below:

Molar Mass of CH4 = 12 + (4x1) = 12 + 4 = 16g/mol

Number of mole of CH4 = 1.49 mole

Mass of CH4 =?

Mass = number of mole x molar Mass

Mass of CH4 = 1.49 x 16

Mass of CH4 = 23.8g

Therefore, the mass of CH4 that has a volume of 33.4 L is 23.8g