Answer: the correct answer is (B) twice the pressure in container A.
Step-by-step explanation:
Based on the illustration, if the number of particles of gas in container A is equal to the number of particles of gas in container B, and the temperature is constant, we can determine the relationship between the pressures in the two containers.
The pressure of a gas is directly proportional to its volume. In this case, container B has half the volume of container A (0.5 L compared to 1.0 L).
According to Boyle's Law, when the temperature is constant, the pressure and volume of a gas are inversely proportional. So, if the volume of container B is half the volume of container A, the pressure in container B will be twice the pressure in container A.
Therefore, the correct answer is (B) twice the pressure in container A.