The determination illustrates the sample to be 840 zinc, Chemistry

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The determination illustrates the sample to be 840 zinc

The purity of a sample containing zinc as well as weighing 0.198 g is determined by measuring the amount of hydrogen formed when the sample reacts with an excess of hydrochloric acid. The determination illustrates the sample to be 84.0% zinc. Explain what amount of hydrogen measured at STP was obtained?

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Chemistry: The determination illustrates the sample to be 840 zinc

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