Two elements, R and Q, combine to form two binary compounds. In the first compound, 14.0 g of R combines with 3.00g of Q. In the second compound, 7.00g of R combines with 4.50g of Q. Show that these data are in accord with the law of multiple proportions. If the formula of the second compound is RQ, what is the formula of the first compound?

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Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.