Question

Определите плотность гелия в баллоне, если при давлении 2,5 атм средняя кинетическая энергия поступательного движения его атомов равна 4,2*10^-21 Дж.

Answer 1

Calculation of Helium Density in the Cylinder

To determine the density of helium in the cylinder, we need to use the ideal gas law equation:

PV = nRT

Where: - P is the pressure of the gas (in this case, 2.5 atm) - V is the volume of the gas (which we don't have) - n is the number of moles of the gas (which we don't have) - R is the ideal gas constant (8.314 J/(mol·K)) - T is the temperature of the gas (which we don't have)

Unfortunately, we don't have enough information to directly calculate the density of helium in the cylinder. The given information only provides the pressure and the average kinetic energy of the helium atoms.

If we had the volume and temperature, we could calculate the number of moles of helium using the ideal gas law and then use the molar mass of helium to calculate the density. However, without the volume and temperature, we cannot proceed with the calculation.

If you have any additional information or if there's anything else I can help you with, please let me know!