Question
When 16 g of O2 combine with 2 g of H2. H2 also combines with carbon to form methane in which 2 g of H2 combine with 6 g of C. If C and O2 combine, then what ratio it will be showing?
- 6:2
- 16:2
- 1:1
- 6: 16
Hint:
The ratio can be obtained by calculating the ratio of the other two molecules.
The correct answer is: 6: 16
- The correct ratio is 6:16.
- In the water molecules, the mass of oxygen is 16 grams, and that of hydrogen is 2 g. Whereas in methane, the mass of carbon is 12 grams and that of hydrogen is 4 grams.
- Thus, the ratio of oxygen: to hydrogen is 16:2 in the water molecule, and the ratio of carbon: to hydrogen is 12:4 or 6:2 in the methane molecule.
- Thus, the ratio of carbon: to oxygen comes out to be 6:16.
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