The Law of Definite Proportions states that a given compound will always have the same mass ratios between its constituent elements.
Simply put, its constituent elements will always combine in the same mass ratio to form said compound.
In your case, you know that the compound is carbon monoxide,
You also know that a given sample of this compound contains
#"2.4 g " + " 3.2 g" = "5.6 g"#
of carbon monoxide. The mass ratio that exists between the elements takes the form
#"mass of C"/"mass of O" = (2.4 color(red)(cancel(color(black)("g"))))/(3.2color(red)(cancel(color(black)("g")))) = 3/4#
This means that when any mass of carbon monoxide is formed, the mass of carbon and the mass of oxygen must be in a
Simply put, for every
You can thus say that
#4.8 color(red)(cancel(color(black)("g C"))) * "4 g O"/(3color(red)(cancel(color(black)("g C")))) = color(green)(|bar(ul(color(white)(a/a)color(black)("6.4 g O")color(white)(a/a)|)))#