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a sample of nitrogen gas has a volume of 450 cm3 and a pressure of 125 kpa. what volume would the gas occupy at 90 kpa if the temperature were to remain constant?

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.