When the pressure that a gas exerts on a sealed container changes from _ atm to 1.80 atm, the temperature changes from 86.0 C to 30.0 C. Use P1/T1=P2/T2

answer: Pressure is always a dependent variable.  Changes in the pressure of a confined gas depend upon changes in either volume or temperature or both.  The temperature is changed from 86.0C to 30.0C, which in turn causes a drop in the pressure of the gas.  The pressure depends on the temperature.

Sure, the calculation using the combined gas law (with constant volume, it is Amontons's law) is the same regardless, but it is always better to word questions with an eye toward the real world.

P1V1 / T1 = P2V2 / T2 combined gas law

P1 / T1 = P2 / T2 V is constant, Amontons's law

P2 = P1T2 / T1 solve for P2

P2 = 1.80 atm x 359.15K / 303.15K

P2 = 2.13 atm

Explanation:

thats a little if u want the answer just look it up on google thats what i do haha : )

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.