11.2 hydrogen reacts with chlorine, calculate the volume and number of molecules formed during the reaction of hydrogen.

We write down the reaction equation.
Cl2 + H2 = 2HCl.
First, you should determine the amount of hydrogen substance. We write down the formula.
n = V / Vm.
Where n is the amount of substance.
V is the volume of the substance.
Vm is the molar volume of the substance.
Next, we substitute the known values into this formula.
n = 11.2 / 22.4 = 0.5 mol.
Next, we determine the number of hydrogen molecules.
N = n * Na.
Where N is the number of molecules.
Na is Avogardo’s number.
N = 0.5 * 6.02 * 10 ^ 23 = 3.01 * 10 ^ 23 molecules.
Answer: n = 0.5 mol, 3.01 * 10 ^ 23 molecules.