Using the molar volume in calculations with chemical equations
2 marks · HardCalculate the number of moles of neon gas present in a 4.8 dm³ flask at room temperature and pressure. Give your answer to two decimal places. (Molar volume = 24 dm³ at rtp.)
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0.20 mol (±0.01)
Also accept: 0.2 mol
Common mistakes: Using cm³ instead of dm³ for volume; Incorrect division or use of wrong molar volume
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Marking points
M1 · 1 mark · Correct use of formula: moles = volume / molar volume
A1 · 1 mark · Final answer: 0.20 mol (accept 0.2)
Worked solution
Use the formula: moles = volume / molar volume
Final answer: 0.20 mol