Answer:
n ≈ 2.42 moles
General Formulas and Concepts:
Chem
Ideal Gas Law: PV = nRT
- P is pressure in mmHg
- V is volume in liters
- n is number of moles
- R is a constant (62.4 L · mmHg/mol · k)
- T is temperature in Kelvins
K = °C + 273
Explanation:
Step 1: Define
V = 50.2 L
P = 755 mmHg
T = -22.0°C = 251 K
Step 2: Find moles n
(755 mmHg)(50.2 L) = n(62.4 L · mmHg/mol · k)(251 K)
37901 mmHg · L = n(15662.4 L · mmHg/mol)
n = 2.41987 moles
Step 3: Check
We are given 3 sig figs. Follow sig fig rules.
2.41987 moles ≈ 2.42 moles
