Calculations involving gas volumes
2 marks · HardA sample of carbon monoxide, CO, has a volume of 6.0 dm³ at rtp. Calculate the number of moles of CO in the sample. Show your working.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
0.25 mol (±0.01)
Also accept: 0.250 mol
Common mistakes: Dividing by 22.4 instead of 24; Providing wrong units
Show mark scheme and worked solution
Marking points
M1 · 1 mark · Correctly rearranges and uses n = volume / 24.
A1 · 1 mark · Gives correct answer: 0.25 mol (allow 0.250 mol), with correct unit.
Worked solution
n = 6.0 ÷ 24 = 0.25 mol