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MCAT Question of the Day
Q:
A researcher pumps a known gas into an empty cylinder, compressing the gas, and, as a consequence, increasing the temperature of the cylinder. In order to determine the amount of gas pumped into the cylinder, which of the following methods would be most effective?
A
use a pressure gauge and calculate the amount of gas based on the pressure and the known volume
B
measure the difference in mass before and after filling
C
measure the change in temperature before and after filling
D
use an ultrasonic device to measure the density of the gas inside the cylinder
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