C1 chemistry OCR 21st century 4.5 / 5 based on 7 ratings ? ChemistryC1GCSEOCR Created by: ElnicholsonCreated on: 04-11-15 16:08 94723105186 Across 1. The five pollutants in the air are carbon dioxide, carbon monoxide, sulphur dioxide, nitrogen oxide and what? (12) 5. Carbon monoxide is produced if there isn't enough _____ when fuels burn. (6) 6. Reactions where oxygen is lost are called _____ reactions. (9) 7. When a hydrocarbon burns, the hydrogen atoms in the fuel combine with oxygen atoms from the air to make what? (8, 5) 8. What percentage of argon makes up the atmosphere? (3) Down 2. In reactions, the mass of the reactants is equal to the mass of the? (8) 3. Any reaction where oxygen is added is called a _____ reaction. (9) 4. What removes carbon dioxide from the atmosphere, other than dissolving in water? (14) 9. All substances are made up of tiny particles called? (5) 10. The atmosphere was formed by carbon dioxide, water vapour and nitrogen being released by what? (9)
Chemistry C7 Notes Completed + Highlighted (Excess) - OCR 21st Century, 2011 Specification 5.0 / 5 based on 1 rating Teacher recommended
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