Calculate the amount of substance if 4 mol of oxygen entered the reaction 2H2 + O2 = 2H2O.

univerkov | May 6, 2021 | education

Given:
n (O2) = 4 mol

To find:
n (H2) -?
n (H2O) -?

Decision:
1) Write the equation of a chemical reaction:
2H2 + O2 => 2H2O;
2) Find the amount of substance H2 (taking into account the coefficients in the reaction equation):
n (H2) = n (O2) * 2 = 4 * 2 = 8 mol;
3) Find the amount of substance H2O (taking into account the coefficients in the reaction equation):
n (H2O) = n (O2) * 2 = 4 * 2 = 8 mol.

Answer: The amount of substance H2 is 8 mol; H2O – 8 mol.

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