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CO and CO2

CO

  • O:C ratio is 1:1
  • The mass of oxygen is about 16 and carbon is about 12. Multiply these masses by the ratio above.
  • 16 g:12 g

History

CO2

  • O:C ratio is 2:1
  • Use same masses as above to multiply.
  • 32 g: 12 g

Definition

Example:

Law of Multiple Proportions

  • CO and CO2

Both have different properties but are made up of the same elements.

When 2 elements form a series of compounds, the ratios of the masses of the 2nd element that combine with 1 gram of the first element can always be reduced to small whole numbers

  • Also referred to as "Dalton's Law"
  • Discovered by John Dalton
  • This principle helped convince him even more of the existence of atoms.

CO: 16g:12g O:C ratio

CO2: 32g: 12g O:C ratio

Mass of Oxygen That Combines with 1 g of Carbon:

  • CO: 16/12= 1.3333333333
  • CO2: 32/12= 2.6666666667

Kaitlyn Coffey

CO: 16/12= 1.3333333333

CO2: 32/12= 2.6666666667

CO2 has exactly twice as much oxygen per gram of carbon.

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