Задача 20653.

Density of gas consisting of a mixture of helium and argon at a pressure of 1.5 atm and a temperature of 27 ° C, equal to 2 g / l. How many helium atoms contained in 1 cm ^ 3 of gas mixture?

Detailed solution with a short recording conditions, laws and formulas used in the decision, the withdrawal of the calculation formula and the answer.
If you have any questions about the decision to write. I try to help.