Question

Чему равна молекулярная масса газа, который при давлении 100 кПа и температуре 27С имеет плотность 0,162 кг/м3

Answer 1

Вычислим молярную массу газа:
M=p*R*T/P=0,162*8.31*300/100*10^3=4*10^-3 кг/моль
Соответствует гелию.

Answer 2

Calculating Molecular Mass of a Gas

To calculate the molecular mass of a gas, we can use the ideal gas law equation, which relates the pressure, volume, temperature, and the number of moles of a gas. The ideal gas law equation is given by:

PV = nRT

Where: - P = pressure - V = volume - n = number of moles - R = ideal gas constant - T = temperature in Kelvin

We can rearrange the equation to solve for the number of moles (n):

n = PV / RT

The molecular mass (M) of the gas can be calculated using the formula:

M = m / n

Where: - M = molecular mass - m = mass of the gas - n = number of moles

Given: - Pressure (P) = 100 kPa - Temperature (T) = 27°C - Density (ρ) = 0.162 kg/m³

Calculation Steps

1. Convert the temperature from Celsius to Kelvin: T(K) = T(°C) + 273.15

2. Calculate the number of moles (n) using the ideal gas law equation: n = PV / RT

3. Calculate the mass of the gas (m) using the formula: m = ρV

4. Finally, calculate the molecular mass (M) using the formula: M = m / n

Let's proceed with the calculations using the given values.

Calculation

1. Convert the temperature from Celsius to Kelvin: T(K) = 27°C + 273.15 = 300.15 K

2. Calculate the number of moles (n): n = (100 kPa) * V / (8.31 J/(mol*K) * 300.15 K) 3. Calculate the mass of the gas (m): m = ρV = 0.162 kg/m³ * V

4. Finally, calculate the molecular mass (M): M = m / n

Unfortunately, the given snippet does not provide the necessary information to calculate the molecular mass of the gas. If you have additional information or specific gas properties, I'd be happy to help with the calculation.