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The Ideal Gas Law is one of the Equations of State. Although the law describes the behavior of an ideal gas, the equation is applicable to real gases under many conditions, so it is a useful equation to learn to use. The Ideal Gas Law may be expressed as: PV = NkT.
Gas Law Problems- Ideal Gas Law Answers. n = PV / RT. n = [ (750.0 mmHg / 760.0 mmHg atmÂ¯1) (0.890 L) ] / (0.08206 L atm molÂ¯1 KÂ¯1) (294.0 K) Please note the division of 750 by 760. That is done in order to convert the pressure from mmHg to atm., because the value for R contains atm. as the pressure unit.