Calculating the volume of a certain number of moles

3 marks · Easy

You have 0.40 mol of neon gas at rtp.

(a)

Calculate the volume in dm³ occupied by this amount of gas at rtp.

[2 marks]

(b)

State your final answer in cm³.

[1 mark]

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.

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(a) 9.6 dm³

(b) 9600 cm³

Common mistakes: dividing by 24 instead of multiplying; forgetting to multiply by 1000 for cm³

Show mark scheme and worked solution

Marking points

M1 (a) · 1 mark · Uses correct calculation: volume = moles × 24 dm³.

A1 (a) · 1 mark · Correctly calculates 9.6 dm³. (follow-through)

A2 (b) · 1 mark · Converts 9.6 dm³ to 9600 cm³. (follow-through)

Worked solution

a) Volume = number of moles × molar volume = 0.40 × 24 = 9.6 dm³.

b) 9.6 dm³ × 1000 = 9600 cm³.