A vessel with a volume of 5 liters is filled with oxygen, the mass of which is 20 g.

A vessel with a volume of 5 liters is filled with oxygen, the mass of which is 20 g. Determine the concentration of molecules in the vessel.

To find the concentration of molecules in a given vessel, we use the formula: n = N / V = (m * Na / M) / V = m * Na / (M * V).

Constants and variables: m is the mass of oxygen (m = 20 g = 0.02 kg); Na – Avogadro’s number (Na = 6.02 * 10 ^ 23 mol-1); M is the molar mass of oxygen (M = 0.032 kg / mol); V – volume (V = 5 l = 0.005 m3).

Let’s perform the calculation: n = m * Na / (M * V) = 0.02 * 6.02 * 10 ^ 23 / (0.032 * 0.005) = 752.5 * 10 ^ 23 m-3.

Answer: The concentration of oxygen molecules in the taken vessel is 752.5 * 10 ^ 23 m-3.