chem homework 0.0 / 5 ? ChemistryHomeworkGCSEAQA Created by: desfringCreated on: 03-10-18 19:36 calculate number of neutrons in boron 6 1 of 8 calculate relative formula mass of sodium hydoxide NaOH = 23 + 6 + 1 = 40 2 of 8 calculate the percentage yield of an investigation that is expected to produce 60 tonnes of ammonia, but only produce 45 tonnes 45 / 60 * 100 = 75% 3 of 8 calculate number of moles on 200g of copper 200 / 63.5 = 3.15 moles 4 of 8 calculate the number of neutrons in iron 30 5 of 8 calculate relative formula mass of calcium carbonate CaCO3 = 100g 6 of 8 calculate the percentage yield of an investigation that expected to produce 495 tonnes of product A but only produced 400 tonnes 400 / 495 = 80.8% 7 of 8 calculate the volume of 7moles in an oxygen gas 22 * 7 = 144.5 8 of 8

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