APFIVE Ideal Gas Law Mole Calculation
The table provides the pressure, volume, and temperature for a sample of a gas. Which of the following shows the correct setup for calculating the number of moles, $$n$$, of the gas using the ideal gas law, $$PV=nRT$$?
| Parameter | Value |
|---|---|
| Pressure | 2 atm |
| Volume | 10 L |
| Temperature | 300 K |
A
Multiplying the pressure and volume without including the ideal gas constant or temperature, leading to an incorrect result.
B
Adding the values of pressure, volume, and temperature together to derive the number of moles, a method that disregards the ideal gas law.
C
Using the ideal gas molar volume at STP (22.4 L/mol) to compute moles at 300 K, which is inappropriate for non-STP conditions.
D
Calculating moles with $$n = \frac{P \times V}{R \times T} = \frac{2 \times 10}{0.0821 \times 300} \approx 0.812\,mol$$.
Question Leaderboard
| Rank | |||||
|---|---|---|---|---|---|
| #1 | lockdante2 | 1 | 1 | 0m 00s | 100 |
| #2 | eiaadev | 1 | 1 | 0m 22s | 78 |
| #3 | mahima6129 | 1 | 1 | 0m 25s | 75 |
| #4 | kat.poirier05 | 1 | 1 | 0m 28s | 72 |
| #5 | aditya4.suresh | 1 | 1 | 1m 19s | 21 |
| #6 | michellejang0116 | 0 | 1 | 0m 00s | -10 |
| #7 | selenavuong2009 | 1 | 2 | 2m 19s | -49 |
| #8 | lvanhui20230312 | 1 | 1 | 3m 04s | -84 |
| #9 | Derinchiay2013 | 2 | 2 | 18m 46s | -926 |
| #10 | 10108343 | 0 | 1 | 1h 04m | -3,881 |
Items per page:
10
1 – 10 of 10