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The elements X and Y combine in different ratios to form four different types of compounds XY, XY2, XY3, and XY4. Consider that there is enough of each compound to contain 2 g of X. in XY the mass of X is 2 g and the mass of Y is 4 g. Arrange the following ratios in order of their increasing value. Rank from highest to lowest ratio. To rank item as equivalent, overlap them.