Agas is contained in a thick-walled balloon. when the pressure change from 100 kpa to 90.0 kpa, the volume changes from 2.50 l to 3.75 l and the temperature changes from 303 k to k.

Explanation:

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The general law of the gases allows us to state:

Now, as the temperature at the second state is the unknown, we solve for it and get:

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it is important to conserve water because there is very limited amount of freshwater here on earth and if we are not smart about how we use it we will only be runnning out of our supply faster than neccessarry.