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Hydrogen used for inflation of balloons may be made by passing steam over red-hot scrap iron. If 77kg of iron will make 44.2m3 of hydrogen,

Hydrogen used for inflation of balloons may be made by passing steam over red-hot scrap iron. If 77kg of iron will make 44.2m3 of hydrogen, how much iron would be needed to make 100m3 of hydrogen?

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