This is a gas law problem that can be solved using the ideal gas law. The student is asked to calculate the molar mass of an unknown gas using the given data. The student can solve this problem by following the steps outlined above.
The problem asks the student to calculate the molar mass of an unknown gas. The student is given the following data:
Volume of the sealed flask: 843 mL
Mass of the sealed flask and dry air: 157.70 g
Mass of the sealed flask and unknown gas: 158.08 g
Temperature: 23.0°C
Pressure: 0.977 atm
The student is asked to do the following:
Calculate the mass of the dry air in the sealed flask.
Calculate the mass of the sealed flask.
Calculate the mass of the unknown gas that was added to the sealed flask.
Calculate the molar mass of the unknown gas.
The student can solve this problem using the following steps:
Use the density of dry air to calculate the mass of the dry air in the sealed flask.
Subtract the mass of the dry air from the mass of the sealed flask and unknown gas to find the mass of the sealed flask.
Subtract the mass of the sealed flask from the mass of the sealed flask and unknown gas to find the mass of the unknown gas.
Use the ideal gas law to calculate the number of moles of unknown gas in the sealed flask.
Divide the mass of the unknown gas by the number of moles to calculate the molar mass of the unknown gas.
Once the student has completed these steps, they will be able to calculate the molar mass of the unknown gas.