This video tutorial explains how to convert between moles and liters of a gas at standard temperature and pressure (STP). It covers the definition of STP, the volume occupied by one mole of gas at STP, and how to use conversion factors to solve related problems. The video also highlights common mistakes students make when performing these calculations and provides practice problems to reinforce learning. Key points include ensuring conditions are at STP and verifying the state of matter is a gas.

What does STP stand for?

• Standard Testing Procedure

• Significant Testing Pressure

• Significant Temperature and Pressure

• Standard Temperature and Pressure

At STP, how many liters does one mole of any gas occupy?

• 18.4 liters

• 20.4 liters

• 22.4 liters

• 24.2 liters

What are the conditions of STP?

• 25 degrees Celsius and 1 atm

• 0 degrees Celsius and 2 atm

• 0 degrees Celsius and 1 atm

• 25 degrees Celsius and 2 atm

To convert moles to liters at STP, which conversion factor is used?

• 1 liter/22.4 moles

• 22.4 moles/1 liter

• 22.4 liters/1 mole

• 1 mole/22.4 liters

What is the volume in liters of 3.8 moles of CO2 gas at STP?

• 85.12 liters

• 84.2 liters

• 84.32 liters

• 85.1 liters

How many moles are in 58.6 liters of nitrogen gas at STP?

• 2.5 moles

• 2.62 moles

• 2.6 moles

• 3.0 moles

Why can't the conversion of 10.3 moles of oxygen gas at 25 degrees Celsius and 2 ATM be calculated using the STP conversion factor?

• Because the volume is too large

• Because it's not at STP conditions

• Because the pressure is too high

• Because oxygen behaves differently

Why is the conversion factor of one mole equals 22.4 liters not applicable for liquids at STP?

• Because STP conditions change for liquids

• Because the pressure affects liquids differently

• Because liquids have different volumes

• Because it only applies to gases

What volume does 0.735 moles of O2 gas occupy at STP?

• 16.5 liters

• 16.4 liters

• 15.5 liters

• 17.5 liters

13.0 liters of chlorine gas at STP contains how many moles?

• 0.6 moles

• 0.58 moles

• 0.7 moles

• 0.5 moles