Final answer:
In this question, we can use Boyle's Law to determine which variables do not need to be solved for the new pressure of a gas sample.
Step-by-step explanation:
In this question, we are given a sample of gas with an initial pressure of 3.2 atm and an initial volume of 4.7L. The volume decreases to 3.9L. We need to determine which variables do not need to be solved for the new pressure.
To solve this, we can use Boyle's Law, which states that the pressure and volume of a gas are inversely proportional when temperature and amount of gas are constant. This means that as the volume decreases, the pressure increases, and vice versa.
In this case, since the volume has decreased, we can conclude that the pressure will increase. Therefore, we do not need to solve for the new pressure because we already know that it will be higher than the initial pressure of 3.2 atm.