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1)A chemical reaction requires 19.1 L of gas at 25 °C and 102 kPa. If this...

1)A chemical reaction requires 19.1 L of gas at 25 °C and 102 kPa. If this volume of hydrogen gas was to be generated by reacting magnesium metal with a strong acid (e.g. HCl), what mass of magnesium metal would be needed? In grams

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