How many oxygen molecules are there in 1 liter of oxyhydrogen gas if the volumetric content of O2 and H2 is 1: 2?

The ratio of oxygen and hydrogen in a mixture is 1: 2. Then the oxygen content is determined from the proportion:

1 liter – 3 components of the mixture

x liters – 1 part of the mixture.

x = 1 * 1/3 = 0.333 liters of air in the mixture.

Let’s make the following proportion:

22.4 liters of gas contains 6.02 * 10 ^ 23 molecules

0.333 liters of gas contains x molecules.

x = 0.333 * 6.02 * 10 ^ 23 / 22.4 = 0.0895 * 10 ^ 23 = 8.95 * 10 ^ 21;

Answer: oxygen molecules in a mixture are 8.95 * 10 ^ 21.