Unit 1: Structure 1: Models of the Particulate Nature of Matter
Topic 1.5: Ideal Gases Questions
Practice 4 exam-style questions for IB Chemistry Topic 1.5. Review the question stems below, then unlock the full Question Bank to access markschemes, model answers, and AI grading.
1Calculate2 marks
• Aimnova practice
Calculate the volume, measured at STP, of 0.350 mol of oxygen gas, O2.
(Vm = 22.7 dm³ mol⁻¹.)
(Vm = 22.7 dm³ mol⁻¹.)
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• Aimnova practice
A 250 cm³ sealed flask contains argon gas at a pressure of 105 kPa and a temperature of 30.0 °C.
Calculate the amount, in moles, of argon present.
(R = 8.31 J K⁻¹ mol⁻¹.)
Calculate the amount, in moles, of argon present.
(R = 8.31 J K⁻¹ mol⁻¹.)
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• Aimnova practice
A gas occupies 250 cm³ at a pressure of 120 kPa.
At constant temperature, the gas is allowed to expand to 400 cm³.
Calculate the new pressure. [2]
At constant temperature, the gas is allowed to expand to 400 cm³.
Calculate the new pressure. [2]
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• Aimnova practice
A 1.50 dm³ sample of gas is at 100 kPa and 27 °C.
It is heated to 177 °C and at the same time compressed to 1.00 dm³.
Calculate the new pressure, in kPa. [3]
It is heated to 177 °C and at the same time compressed to 1.00 dm³.
Calculate the new pressure, in kPa. [3]
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