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A mixture of chromium and zinc weighing 0.362 g was reacted with an excess of hydrochloric...

A mixture of chromium and zinc weighing 0.362 g was reacted with an excess of hydrochloric acid. After all the metals in the mixture reacted, 158 ml of dry hydrogen gas was collected at 27 degrees Celcius and 750 torr. Determine the mass percent of zinc in the sample.

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