Question

How many moles of gas are in a sample occupying 0.738L at 135 mmHG and 30°C?

A) 190 mol

B) 4.01 mol

C) 40.5 mol

D) 0.00527 mol

E) 0.000433 mol

Answer 1

According to the Ideal Gas Law equation, the number of moles of gas in the given sample is 0.00527 mol.

Step-by-step explanation:

To find the number of moles of gas, we can use the Ideal Gas Law equation: PV = nRT. Where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature. Rearranging the equation to solve for n, we get n = PV / RT. Plugging in the values from the question into the equation gives us:

n = (135 mmHg * 0.738 L) / (0.0821 L*atm/mol*K * 303 K) = 0.00527 mol

Therefore, the answer is D) 0.00527 mol.