Question

If a sample that contains oxygen and hydrogen gases has a pressure of 234 mm Hg in a 2.50 ml flask at 25°C, the same sample of gases is moved to a 50.0 ml flask at 25°C. What is the new pressure of gas?

A) 4.68 mm Hg
B) 11.70 mm Hg
C) 46.80 mm Hg
D) 117.00 mm Hg

Answer 1

Using Boyle's Law which states that pressure is inversely proportional to volume at constant temperature, the new pressure of the gas when moved from a 2.50 ml flask to a 50.0 ml flask at the same temperature is found to be 11.70 mm Hg.

Step-by-step explanation:

To find the new pressure of a gas when it is transferred from one flask to another at constant temperature, you can use Boyle's Law, which states that the pressure of a gas is inversely proportional to its volume when the temperature and the amount of gas are held constant (P1V1 = P2V2). Given the initial conditions of a pressure of 234 mm Hg in a 2.50 ml flask and the final condition of a 50.0 ml flask, we can set up the equation:
234 mm Hg * 2.50 ml = P2 * 50.0 ml

Solving for P2 (the new pressure), we get:

P2 = (234 mm Hg * 2.50 ml) / 50.0 ml

P2 = 11.70 mm Hg

Therefore, the correct answer is B) 11.70 mm Hg.