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(a) How many moles of ammonium ions are in 0.777 g of ammonium carbonate? (b) What...

(a) How many moles of ammonium ions are in 0.777 g of ammonium carbonate?

(b) What is the mass, in grams, of 0.0421 mol of iron(III) phosphate?

(c) What is the mass, in grams, of 5.12 1023 molecules of aspirin, C9H8O4?

(d) What is the molar mass of a particular compound if 0.070 mol weighs 6.46 g?

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