Write the *molecular formulae* and calculate the *molecular mass* of the following: 1.Water 2.Calcium carbonate 3.Sulphuric acid. 4.Hydrochloric acid 5.Quick lime(Calxium oxide) 6.Methane. 7.Phosphorous pentachloride. 8.Carbondioxide. 9.Sulphur di oxide. 10.Nitric acid. 11.Glucose. 12.Baking Soda(Sodium hydrogen carbonate) 13.Washing Soda(Sodium Carbonate) 14.Vinegar(Acetic acid) 15.Caustic Soda(Sodium hydroxide)
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Next, multiply the atomic mass of each atom by the number of atoms in the compound. There is one nitrogen atom (no subscript is given for one atom). There are three hydrogen atoms, as indicated by the subscript. molecular mass = (1 x 14.0067) + (3 x 1.00794) molecular mass = 14.0067 + 3.02382.
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