Question

How many moles of propane are contained in a 5.00 L tank at 450 torr and 25°C?

A. 92 mol
B. 1.4 mol
C. 1100 mol
D. 0.12 mol
E. 41 mol

Answer 1

There are approximately 0.1212 moles of propane in the 5.00 L tank at 450 torr and 25°C.

Step-by-step explanation:

To determine the number of moles of propane in the tank, we need to use the ideal gas law equation:

PV = nRT

Where:

• P is the pressure in atm
• V is the volume in L
• n is the number of moles
• R is the ideal gas constant (0.0821 L·atm/mol·K)
• T is the temperature in K

Given:

• P = 450 torr = 450/760 atm = 0.5921 atm
• V = 5.00 L
• T = 25°C = 25 + 273.15 K = 298.15 K

Substituting the values into the equation:

0.5921 atm * 5.00 L = n * 0.0821 L·atm/mol·K * 298.15 K

Solving for n:

n = (0.5921 atm * 5.00 L) / (0.0821 L·atm/mol·K * 298.15 K)

n = 0.1212 mol

Therefore, there are approximately 0.1212 moles of propane in the 5.00 L tank at 450 torr and 25°C.