Sub-topic 1
2026 · National Preliminary
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Combined gas law: finding volume from changes in pressure and temperature
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Sub-topic 2
2026 · National Preliminary
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Number of molecules in a given volume of ideal gas at stp
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Sub-topic 3
2026 · National Preliminary
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Partial pressure of a gas in a mixture using dalton's law
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Sub-topic 4
2026 · National Preliminary
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Density of a gas at stp from its molar mass
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Sub-topic 5
2026 · National Preliminary
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Volume of an ideal gas from moles, temperature and pressure (pv = nrt)
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Sub-topic 6
2024 · National Final
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Volume of an ideal gas from moles, temperature and pressure (pv = nrt)
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Sub-topic 7
2025 · National Preliminary
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Total pressure of a gas mixture using the ideal gas law
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Sub-topic 8
2025 · National Preliminary
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Volume of hydrogen gas at stp from an alcohol reacting with excess sodium
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Sub-topic 9
2026 · National Semifinal
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Mass of a gas from the ideal gas law given volume, temperature and pressure
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Sub-topic 10
2026 · National Semifinal
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Mass of propane burned from the volume of co2 produced at stp
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Sub-topic 11
2026 · National Semifinal
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Mean molar mass of a gas mixture from its percentage composition
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Sub-topic 12
2026 · National Quarterfinal
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Partial pressure of a gas in a mixture using mole fraction
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Sub-topic 13
2025 · National One-Eighth
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Partial pressure of a gas in a mixture using mole fraction
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Sub-topic 14
2026 · National Quarterfinal
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Molar mass of a gas from its rate of effusion relative to a known gas (graham's law)
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Sub-topic 15
2025 · National Final
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Molar mass of a gas from its rate of effusion relative to a known gas (graham's law)
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Sub-topic 16
2024 · National Final
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Molar mass of a gas from its rate of effusion relative to a known gas (graham's law)
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Sub-topic 17
2026 · National One-Eighth
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Gas volume at stp from combustion stoichiometry
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Sub-topic 18
2026 · National One-Eighth
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Graham's law of diffusion: relative rates and molar mass
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Sub-topic 19
2026 · National One-Eighth
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Charles's law: volume change of a gas at constant pressure
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Sub-topic 20
2018 · National Preliminary
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Graham's law: diffusion time from molar mass
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Sub-topic 21
2023 · National One-Eighth
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Ideal gas volume from moles, temperature and pressure
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Sub-topic 22
2023 · National One-Eighth
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Graham's law: molar mass from relative diffusion rate
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Sub-topic 23
2024 · National One-Eighth
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Gas volume at stp from combustion/reaction stoichiometry
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Sub-topic 24
2023 · National Preliminary
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Mass of a metal that reacts completely with a given gas volume at stp
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Sub-topic 25
2016 · National One-Eighth
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Volume of oxygen at stp from thermal decomposition of silver(i) oxide
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Sub-topic 26
2021 · National Preliminary
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Volume ratio of methane to oxygen from a 2:1 mass ratio, via avogadro's law
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Sub-topic 27
2023 · National Preliminary
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Molar mass of a gas from its effusion rate relative to helium, via graham's law
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Sub-topic 28
2023 · National Preliminary
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Molar mass of a gas from its mass and volume at stp
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Sub-topic 29
2023 · National Quarterfinal
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Minimum volume of oxygen at stp to completely combust one mole of pentene
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