Stephanie M. answered • 05/17/15

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All of these problems involve using the Combined Gas Law, which states:

(p

_{1}V_{1})/T_{1}= (p_{2}V_{2})/T_{2},where p

_{1}, V_{1}, and T_{1}are the initial pressure, volume, and temperature of a gas and p_{2}, V_{2}, and T_{2}are the pressure, volume, and temperature after some change is made to the gas.All of these problems just give you five of those values and ask you to solve for the sixth. The first problem, for example, tells you that, initially, V

_{1}= 20.4 mL, p_{1}= 558 mm Hg, and T_{1}= 25.2 C. It tells you that, after some change, V_{2}= 56.8 mL and T_{2}= 55 C. It asks you to solve for p_{2}. You'll just need to plug in those numbers and solve.Each problem works the same way. Just be careful to keep an eye out for changing units. In problem 2, for example, you're given T

_{1}in C and asked for T_{2}in K. Just find T_{2}in C and then convert to K.