The mass of zinc is equal to 128 g.
Let’s determine the volume of hydrogen that was formed as a result of the reaction.
First, you need to write down the reaction equations.
3Zn + 2H3PO4 = Zn3 (PO4) 2 + 3H2.
Determine the amount of zinc. We use the following formula to solve.
n = m / M.
Let’s calculate the molar mass.
M (Zn) = 65 g / mol.
n = 128/65 = 1.96 mol.
Further, according to the reaction equation, we determine the amount of hydrogen substance.
1.96 mol zinc – x mol hydrogen.
3 mol zinc – 3 mol hydrogen.
X = 3 * 1.96 / 3 = 1.96 mol.
Let’s determine the volume of hydrogen.
V = n * Vm = 1.96 * 22.4 = 44 liters.
Answer: the volume of hydrogen is 44 liters.
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