# How many liters of hydrogen measured under normal conditions can be obtained by the action

How many liters of hydrogen measured under normal conditions can be obtained by the action of 13 g of zinc on hydrochloric acid?

The reaction of zinc with sulfuric acid is described by the following formula:

Zn + 2HCl = ZnCl2 + H2

That is, the molar amounts of zinc used and hydrogen produced are equal.

Let’s calculate the molar amount of zinc.

The molar mass of zinc is 65 grams / mol.

13 grams of zinc is 13 grams / 65 grams / mol = 0.2 mol of the substance.

The same number of moles of hydrogen will be obtained

1 mole of ideal gas under normal conditions takes a volume equal to 22.4 liters

0.2 mol of hydrogen will take up a volume of 22.4 liters / mol * 0.2 mol = 4.48 liters.

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