need help with a couple chemistry problems.?

Posted on 2014-11-19 04:58:00 in Chemistry by STEVO

Calculate the final volume when 20.0L of argon gas undergoes a pressure change from 2.35atm to 6.85atm . Assume that the temperature remains constant

A 3.00L sample of nitric oxide gas at 75?C is cooled to 35?C.
If the pressure remains constant, what is the final volume?

Calculate the final Celsius temperature of nitrogen dioxide gas if 1.95 L of the gas at 10?C and 450mmHg is cooled until the pressure is 250mmHg . Assume that the volume remains constant.

A sample of hydrogen chloride gas occupies 0.750L at STP.
What is the pressure in atm if the volume is 7.50×10?2L at 15?C?

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