+1-315-636-4485
+91 98151-74050 
The number of moles is a fourth variable that can be added to the three previous variables of temperature, pressure, and volume as a way to describe a gas sample. The Ideal Gas Law : PV = nRT describes the physical behavior of an ideal gas in terms of the pressure, volume, temperature, and number of moles of gas present. "R" is a constant that is dependent on the units used for pressure and will be provided. This quiz covers problems using the Ideal Gas Law. Select the best answer to the choices.
What is the number of moles of gas contained in a 3.0L vessel at 300K with a pressure of 1.50 atm? PV = nRT R = .0821 L*atm/mol*K
0.18 mol
4.5 mol
2.3 mol
1.89 mol
If the pressure exerted by gas at 25C in a volume of .044L is 3.81 atm, how many moles of gas are present? R = .0821 L*atm/mol*K
8.89 mol
1.23 mol
0.069 mol
2.345 mol
Given: n = 2.49 mol V = 1.00 L P = 143 kPa R = 8.314 L*kPa/mol* K What is the temperature in degrees Celsius?
-273 C
-266 C
690 K
6.90 K
Given: P = .900 atm V = unknown n = .323 mol R = .0821 L*atm/mol*K T = 265 K Find the volume.
78.1L
0.781L
781L
7.81L
Determine the kelvin temperature requires for .0470 mol of gas to fill a balloon to 1.20L under .988 atm of pressure. R = .0821 L*atm/mol*K
190K
234K
307K
234C
A sample of an ideal gas is held at a constant temperature. If the pressure is decreased to 1/2 P, the volume will be:
Doubled
Decreased to 1/2V
Increased to 2V
Unchanged
A cylinder has 2 moles of ideal gas at a constant volume and pressure. Adding 2 more moles of gas makes the temperature_____.
Tripled
Halved
Doubled
Unchanged
P, V, M, T, and R are pressure, volume, molar mass, temperature and gas constant, then density of an ideal gas is:
PM/RT
PM/T
P/R
R/PM
