Which statement best defines Dalton's law of partial pressures?
A. At constant pressure, the volume of a gas increases or decreases by the same factor that its temperature increases or decreases.
B. It defines a gas in which collisions between atoms or molecules are perfectly elastic and there are no intermolecular attractive forces.
C. The law states that the product of the volume of a gas and its pressure over the temperature is equal to a constant.
D. The total pressure exerted by a gas mixture is equal to the sum of the partial pressures of each individual gas in the mixture.

Question

Which statement best defines Dalton's law of partial pressures?
	A.	At constant pressure, the volume of a gas increases or decreases by the same factor that its temperature increases or decreases.
	B.	It defines a gas in which collisions between atoms or molecules are perfectly elastic and there are no intermolecular attractive forces.
	C.	The law states that the product of the volume of a gas and its pressure over the temperature is equal to a constant.
	D.	The total pressure exerted by a gas mixture is equal to the sum of the partial pressures of each individual gas in the mixture.