Join thousands of students who trust us to help them ace their exams!Watch the first video
Multiple Choice
Using the Ideal Gas Law, calculate the number of moles of air in a car tire with an internal volume of 30.0 L, a temperature of 20°C, and a pressure of 3.50 atm.
A
5.12 moles
B
1.75 moles
C
4.28 moles
D
2.86 moles
Verified step by step guidance
1
Start by recalling the Ideal Gas Law, which is expressed as: , where is the pressure, is the volume, is the number of moles, is the ideal gas constant, and is the temperature in Kelvin.
Convert the temperature from Celsius to Kelvin using the formula: . For 20°C, this becomes K.
Use the Ideal Gas Law to solve for the number of moles . Rearrange the equation to .
Substitute the known values into the equation: atm, L, L atm/mol K, and K.
Calculate the number of moles using the substituted values: . This will give you the number of moles of air in the car tire.