A certain mass of carbon reacts with 9.53 g of oxygen to form carbon monoxide. grams of oxygen would react with that same mass of carbon to form carbon dioxide, according to the law of multiple proportions.

9.53 *2= 19.06

Explanation:

The law of multiple proportions states that if two elements combines to form more than one compound the ratio of masses of the second element which combines to the fixed mass of the first element will always be the ratios of the small whole numbers.

in case of carbon monoxide, mass of carbon will be the same of mass of oxygen.

But in case of carbon dioxide, if carbon is 9.53 units then oxygen will be twice as that of carbon.

CO2, so 9.53*2= 19.06 grams of oxygen will combine with 9.53 grams of carbon to form carbon dioxide.

2b2t

explanation:

2b2t

there are two significant figures.