Boyle’s law states that the volume of a gas is inversely proportional to its pressure if the
A. temperature and number of particles are constant.
B. temperature reaches absolute zero.
C. number of particles decreases.
D. temperature and number of particles are doubled.
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To answer this question, we need to understand Boyle's law, which states that the volume of a gas is inversely proportional to its pressure, as long as the temperature and number of particles are constant.
So, the correct answer is A. If either the temperature or the number of particles changes, Boyle's law will not hold true.
To determine the correct answer, we can first eliminate options B and C because they involve changes in temperature or number of particles, which goes against Boyle's law.
Then, we can consider option D. If both the temperature and number of particles are doubled, Boyle's law may or may not hold depending on which factor has a greater effect on the gas volume. If the increase in temperature causes the gas to expand more than the increase in the number of particles causes it to contract, then Boyle's law won't hold true. Therefore, we can eliminate option D as well.
By process of elimination, the correct answer is A.