Carbon and oxygen form two compounds. Carbon content in one of them is 42.9% and in the others is 27.3%. The given data is in agreement with

Explanation

In the first compound, the carbon content is 42.9%. This means that 42.9 g of carbon combine with 100 - 42.9 = 57.1 g of oxygen.
The amount of oxygen that will combine with a fixed amount say 100 g of carbon
`=(57.1)/42.9 xx 100 = 133.1 g`
In the first compound, the carbon content is 42.9%. This means that 42.9 g of carbon combine with `100 - 42.9 = 57.1` g of oxygen.
The amount of oxygen that will combine with a fixed amount say 100 g of carbon
`=(57.1)/(42.9) xx 100 = 133.1 g`
In the second compound, the carbon content is 27.3%. This implies with `100-27.3 = 72.7` g of oxygen.
The amount of oxygen that combines with 100 g of carbon =`(72.7)/(27.3) xx 100 = 266.3 g`
The ratio in the amounts of oxygen that combine with 100 g of carbon in the two cases is 133.1 : 266.3, i.e., 1 : 2 which is a simple whole number ratio. Therefore, the data are in agreement with the law of multiple proportions.