Ideal Gas Law and Stoichiometry

The video tutorial covers solutions to a gas law FRQ, focusing on the ideal gas law, dissociation of PCL5, and pressure calculations. It includes solving for moles and partial pressures, stoichiometry of H2 and O2, and calculating moles of H2O vapor. The tutorial emphasizes understanding chemical reactions and gas behavior under different conditions.

What is the first step in solving an ideal gas law problem when given grams of a substance?

• Convert grams to liters

• Convert grams to moles

• Convert grams to Kelvin

• Convert grams to atmospheres

In Part B, what is the total pressure inside the container after some PCl5 dissociates?

• 1 atmosphere

• 0.28 atmospheres

• 0.36 atmospheres

• 0.64 atmospheres

How do you determine the number of moles of total gas in the container in Part B?

• By using the temperature and moles only

• By using the pressure and volume only

• By using the pressure, volume, and temperature

• By using the volume and temperature only

What is the partial pressure of PCl3 after the reaction in Part B?

• 0.460 atmospheres

• 0.280 atmospheres

• 0.360 atmospheres

• 0.560 atmospheres

In question number two, what is the first step to isolate the pressure of the gas mixture?

• Multiply the total pressure by the volume

• Subtract the partial pressure of water

• Add the partial pressure of water

• Divide the total pressure by the temperature

Which reactant runs out first in the reaction between H2 and O2?

• Neither runs out

• O2

• Both run out simultaneously

• H2

What is the total pressure in the container after the reaction in question number two?

• 1.14 atmospheres

• 0.50 atmospheres

• 0.92 atmospheres

• 1.00 atmospheres

How do you calculate the number of moles of H2O as vapor in the container?

• Using the volume and temperature only

• Using the pressure, volume, and temperature

• Using the pressure and volume only

• Using the temperature and moles only

What is the pressure of the vapor pressure of water used in Part C?

• 0.500 atmospheres

• 0.738 atmospheres

• 0.692 atmospheres

• 0.450 atmospheres

What is the final number of moles of H2O calculated in Part C?

• 0.0144 moles

• 0.0151 moles

• 0.0166 moles

• 0.0075 moles