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2. Atoms, molecules and stoichiometry
A section of Chemistry, 9701
Listing 10 of 208 questions
Carbon disulphide vapour burns in oxygen according to the following equation. CS2+ 3O2→ CO2+ 2SO2A sample of 10 cm3 of carbon disulphide was burned in 50 cm3 of oxygen. After measuring the volume of gas remaining, the product was treated with an excess of aqueous sodium hydroxide and the volume of gas measured again. All measurements were made at the same temperature and pressure, under such conditions that carbon disulphide was gaseous. What were the measured volumes?
9701_w08_qp_1
MCQ
2008
Paper 1, Variant 0
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Use of the Data Booklet is relevant to this question. A significant contribution to atmospheric carbon dioxide levels comes from the thermal decomposition of limestone, in the manufacture of cement and of lime for agricultural purposes. Cement works roast 1000 million tonnes of limestone per year and a further 200 million tonnes is roasted in kilns to make lime. What is the total annual mass output of carbon dioxide (in million tonnes) from these two processes?
9701_w11_qp_11
MCQ
2011
Paper 1, Variant 1
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Questions Discovered
208