In the laboratory, 41.4 mL of hydrogen gas was collected at 22.0 oC and had a pressure of 748 torr. This hydrogen gas was collected from the reaction of hydrochloric acid on magnesium metal according to the balanced equation below. Calculate the mass of magnesium used.
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Tin has ten stable isotopes. the heaviest, 124sn, makes up 5.80% of naturally occuring tin atoms. how many atoms of 124sn are present in 82.0 g of naturally occurring tin? what is the total mass of the 124sn atoms in this sample?
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