a sample of gas occupies 2.00 liters under standard conditions. what temperature would be required for this sample of gas to occupy 3.00 liters and exert a pressure of 4.00 atm?

Sum of brother and sisters age is 26. four times the brothers age is subtracted from three times the sisters age, the difference is 8. what are the ages of the brother and sister?

Under which circumstances are kp and kc equal for the reaction aa(g)+bb(g)⇌cc(g)+dd(g)?

What is the value of the standard enthalpy of formation of an element in its most stable form?