C1 chemistry OCR 21st century 4.5 / 5 based on 7 ratings ? ChemistryC1GCSEOCR Created by: ElnicholsonCreated on: 04-11-15 16:08 69107123584 Across 1. In reactions, the mass of the reactants is equal to the mass of the? (8) 4. What percentage of argon makes up the atmosphere? (3) 5. Whats the name of the fuel containing carbon and hydrogen? (11) 9. What percentage of oxygen makes up the atmosphere? (6, 3) 10. When coal burns, you mostly get what? (6, 7) Down 2. Reactions where oxygen is lost are called _____ reactions. (9) 3. The oceans formed when the water vapour ____ when the Earth cooled. (9) 6. When atoms are joined together they make? (9) 7. The atmosphere was formed by carbon dioxide, water vapour and nitrogen being released by what? (9) 8. Carbon monoxide is produced if there isn't enough _____ when fuels burn. (6)
Chemistry C7 Notes Completed + Highlighted (Excess) - OCR 21st Century, 2011 Specification 5.0 / 5 based on 1 rating Teacher recommended
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