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How many moles of substance are contained in each of the following samples? (a) 18.3 g of NH 3 (b) 5.32 g of ammonium bromide NH 4 Br (c) 6.6 g of PCl 5 (d) 215 g of Sn answer Br 79.9 N 14.0 P 30.9 Cl 35.5 C 12.0 S 32.0 Sn 118.7 mol mol g g mol g mol g g M m n a M m n M m mass molar mole one of mass mass total n moles of number NH NH NH 07 . 1 0 . 17 3
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