# Moles and Calculations in Chemistry Quiz - gcsescience.com.

 1. A mole is defined asa) An abbreviation for molecule b) The amount of nitrogen in one litre of air c) The amount of energy needed to          heat 1g of platinum through 1°C d) The number of atoms in 12g of carbon twelve
 2. What is the mass of one mole of oxygen molecules?        Oxygen is O2.  RAM of oxygen = 16.a) 8g b) 16g c) 32g d) 64g
 3. What is the RFM of CaCO3? Ca = 40. C = 12. O = 16.a) 68 b) 100 c) 124 d) 204
 4. What is the mass of one mole of CaCO3?        Ca = 40. C = 12. O = 16.a) 68g b) 100g c) 124g d) 132g
 5. What is the percentage of nitrogen in NH4NO3?        N = 14. H = 1. O = 16.a) 17.5% b) 29% c) 35% d) 58%
 6. 33.6g of iron reacts with 14.4g of oxygen. What is the      empirical formula of iron oxide?a) FeO b) Fe2O c) FeO2 d) Fe2O3
 7. A current of 10 Amps is passed for 5 hours through molten       aluminium oxide. What mass of aluminium is deposited?a) 0.622g b) 1.865g c) 16.79g d) 27.0g

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