How many moles of gas are in a gas sample occupying 1.40 L at 553 mmHg and 294 K?
A)32.1 mol
B)0.0422 mol
C)23.7 mol
D)0.00346 mol
E)2.63 mol

Question

Quizplus · Accepted Answer

To find the number of moles of gas, we can use the ideal gas law equation: PV = nRT, where P is the pressure in atmospheres, V is the volume in liters, n is the number of moles, R is the ideal gas constant (0.0821 L·atm/(mol·K)), and T is the temperature in Kelvin. First, convert the pressure from mmHg to atm: 553 mmHg * (1 atm / 760 mmHg) = 0.7276 atm. Then, rearrange the ideal gas law to solve for n: n = PV / RT. Plugging in the values: n = (0.7276 atm * 1.40 L) / (0.0821 L·atm/(mol·K) * 294 K) = 0.0422 mol.

How Many Moles of Gas Are in a Gas Sample