cover. (a) Pb(C2H5)4 (d) calcium nitrate (b) Na2SO4 10H20 (e) magnesium phosphate (c) Fe4[Fe(CN)6]3 3.35 Calculate the mass in grams of the following. (a) 1.25 mol Ca3(PO4)2 (b) 0.600 Humol C4H10

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Q: What is the mass, in grams, of 1.40×1021 molecules of aspirin, C9H8O4

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Q: What is the mass, in grams, of 4.06 1023 molecules of aspirin, C9H8O4?

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Q: What is the mass, in grams, of 7.70 * 1020 molecules ofcaffeine, C8H10N4O2?

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Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.