Answers

2016-05-07T20:32:57+05:30
Mass of 1 mole of oxygen = 16 u

Mass of 0.2 moles = 16 * 0.2 = 3.2
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2016-05-07T20:42:43+05:30
N = given mass / molecular mass . n=0.2 molecular mass= 16 g . Therefore , 0.2= mass/16 . Mass = 0.2 into 16 = 3.2-g
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