Question

Рассчитайте массу 5 л (н.у) кислорода

Answer 1

1)Количество вещества(О2)=5л:22.4л/моль=0.22моль
2)масса(О2)=0.22мольх32г/моль=7.14г

Answer 2

Calculating the Mass of 5 Liters of Oxygen (O2)

To calculate the mass of 5 liters of oxygen at standard conditions (normal conditions), we can use the ideal gas law, which states that PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.

Given that the molar volume of a gas at standard conditions is approximately 22.4 liters per mole, we can calculate the mass of 5 liters of oxygen.

Using the molar volume of oxygen at standard conditions (V(O2) = 22.4 L/mol), we can calculate the mass (m) of 5 liters of oxygen (O2) using the formula:

m = n * M where: - n is the number of moles - M is the molar mass of oxygen (O2)

Calculation

Using the molar volume of oxygen at standard conditions (V(O2) = 22.4 L/mol) and the molar mass of oxygen (O2 = 32 g/mol), we can calculate the mass of 5 liters of oxygen.

The number of moles (n) can be calculated using the formula: n = V / Vm where: - V is the volume of the gas - Vm is the molar volume of the gas at standard conditions

Substituting the values: n = 5 L / 22.4 L/mol

The molar mass of oxygen (O2) is 32 g/mol.

Now, we can calculate the mass: m = n * M

Result

The mass of 5 liters of oxygen (O2) at standard conditions is approximately 71.43 grams.

This calculation is based on the molar volume of oxygen at standard conditions and the molar mass of oxygen (O2)