A solution contains 20.0% (by mass) of ammonium sulfate, (NH4)2SO4, andhas density of 1.12g/mL. (a) What is the mass (in grams) of a 250.-mL sample of this solution? (b) How many grams of (NH4)2SO4 are present in a 250.-mL sample of this solution? (c) Calculate: (i) the molar concentration, and (ii)the molality of this solution.

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