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Practice IB Chemistry Topic R2.1 How Much? the Amount of Chemical Change with authentic exam-style questions for both SL and HL students. This question bank focuses on the exact syllabus content for R2.1 How Much? the Amount of Chemical Change and mirrors Paper 1A, 1B, 2 style where relevant.
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Bromoethane is produced by:
What is the atom economy for the
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A gaseous hydrocarbon is found to have an empirical formula of . At standard temperature and pressure (STP), the density of this gas is .
(a) the molar mass of the hydrocarbon and its molecular formula, using as the molar volume of an ideal gas at STP.
(b) Silver metal can be recovered from a solution of silver nitrate by a displacement reaction with copper.
Bioethanol, , is burned in a car engine according to The following standard enthalpies of formation are provided.
| Substance | / |
|---|---|
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A student recorded the following burette readings during a titration:
Initial volume:
Final volume:
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Zinc reacts with dilute sulfuric acid according to the following equation:
A student reacts of zinc with of sulfuric acid.
(a) the limiting reactant in this reaction.
(b) the volume of hydrogen gas produced at STP.
(c) If the experiment yields 85% of the expected hydrogen gas, the actual volume collected.
A sample of copper is added to of silver nitrate solution. the limiting reactant and the maximum mass of silver, in grams, that can be produced.
What is the percentage uncertainty in the volume of solution delivered?
0.10%
0.50%
1.0%
2.0%