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Recent content by Symzyx

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P1 MCQ's preparation thread for chemistry ONLY!!!!

A 0.005 mol sample of anhydrous calcium carbonate was completely thermally decomposed to give 100cm3 of gas measured at a certain temperature and pressure. In a separate experiment carried out at the same temperature and pressure, a 0.005mol sample of anhydrous calcium nitrate was completely...
- Symzyx
- Post #590
- Feb 10, 2017
- Forum: A-Levels
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Chem P1 Mcq Help thread

help me with this please~ 17 A piece of rock has a mass of 2.00g. It contains calcium carbonate, but no other basic substances. It neutralises exactly 36.0cm3 of 0.500moldm–3 hydrochloric acid. What is the percentage of calcium carbonate in the 2.00g piece of rock? A 22.5% B 45.0% C 72.0% D 90.1%
- Symzyx
- Thread
- Feb 3, 2017
- Replies: 1
- Forum: Help, Ideas & Suggestions
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P1 MCQ's preparation thread for chemistry ONLY!!!!

17 A piece of rock has a mass of 2.00g. It contains calcium carbonate, but no other basic substances. It neutralises exactly 36.0cm3 of 0.500moldm–3 hydrochloric acid. What is the percentage of calcium carbonate in the 2.00g piece of rock? A 22.5% B 45.0% C 72.0% D 90.1% An explanation would...
- Symzyx
- Post #588
- Feb 3, 2017
- Forum: A-Levels

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