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Calculate the mass of 61.6mmol SeO2? What is the activity in one mL of 3(H2O) that has a density of 1 g/cm3? Compute the sums below. (Assume that the terms in the first sum are consecutive terms of an arithmetic sequence.)? Given the following equation:
Fe2O3 + 3 C → 2 Fe + 3 CO How many grams of Fe are formed when 16 mol of C reacts? -g Fe? Find three consecutive multiples of five such that the product of the first and second numbers minus seven times the 3rd one is 125?