Question

We have kept 2.52 L of CO2 gas at 31.5 oC and 556 torr pressure. Determine its mass in g

Answer 1

To determine the mass of CO2 gas, we can use the ideal gas law equation and convert the temperature to Kelvin and the pressure to atmospheres. Once we know the number of moles, we can calculate the mass of CO2 using the molar mass.

Step-by-step explanation:

To determine the mass of CO2 gas, we can use the ideal gas law equation:

PV = nRT

Where:

• P is the pressure in atm (convert torr to atm)
• V is the volume in L
• n is the number of moles
• R is the ideal gas constant (0.0821 L.atm/mol.K)
• T is the temperature in Kelvin (convert oC to K)

We can rearrange the equation to solve for n:

n = PV / RT

Once we know the number of moles, we can calculate the mass of CO2 using the molar mass of carbon dioxide (44.01 g/mol):

Mass = n x molar mass

Remember to convert the temperature to Kelvin and the pressure to atmospheres before plugging them into the equation.