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ikea By, , , , ~ I:, , be formed when 3.00 g of carbon is burnt in 50.00 g of, ‘oxygen? Which law of chemical combination will govern your, answer?, 3. What are polyatomic ions? Give examples., rite the chemical formulae of the following., (a) Magnesium chloride, (b) Calcium oxide, (c)_ Copper nitrate, (g) Aluminium chloride, (e) Calcium carbonate., Give the names of the elements present in the following, compounds., (a) Quick lime, (b) Hydrogen bromide, ( ig powder, (d) Potassium sulphate., Calculate the molar mass of the following substances., (a) Bthyne, C,H,, (b) Sulphur molecule, S,, (c) Phosphorus molecule, P, (Atomic mass of phosphorus, =31), (@) Hydrochloric acid, HCL, (e) Nitric acid, HNO,, 7. What is the mass of—, (a) 1 mole of nitrogen atoms?, (0) 4 moles of aluminium atoms (Atomic mass of aluminium, = 27)?, (c) 10 moles of sodium sulphite (Na,SO,)?, S-CBnwert into mole., (a) 12 g of oxygen gas, (0) 20g of water, 32 g of carbon dioxide., What is the mass of, {@) 0.2 mole of oxygen atoms?, (>) 0.5 mole of water molecules?, “Calculate the number of molecules of sulphur (S,) present in, , of solid sulphur., 11 calculate the number of aluminium ions present in 0.051 g, of aluminium oxide., , (Hint: The mass of an ion is the same as that of an atom of, the same element. Atomic mass of Al = 27 u), , , , 44, , 2000-21, , “|, , Ae m@US BO, , , , Be be Ze x, Text editor Edit picture Fill Form Annotation, , = C a