What is the pressure of a 3.00 L gas vessel that has 18.0 grams of helium at 25°C?
(R= 0.0821 L atm/ mol K)

Question

Quizplus · Accepted Answer

To find the pressure, use the ideal gas law: PV = nRT. First, calculate the number of moles of helium (n) using its molar mass (4.00 g/mol): n = 18.0 g / 4.00 g/mol = 4.5 mol. Convert temperature to Kelvin: T = 25°C + 273.15 = 298.15 K. Substitute into the ideal gas law: P = nRT/V = (4.5 mol)(0.0821 L atm/mol K)(298.15 K) / 3.00 L = 36.7 atm.

What Is the Pressure of a 3