What volume of hydrogen will be required for complete hydrogenation of 11.2 liters of acetylene?

We write the reaction: C2H2 + 2H2 = C2H6
We compose the proportion:
22.4 liters of acetylene – 2 * 22.4 liters of hydrogen required
11.2 liters of acetylene – x liters of hydrogen required
where: x = 2 * 22.4 * 11.2 / 22.4 = 22.4 liters

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