Chemistry
The ratio of hydrogen and oxygen by mass in a molecule of water is :
- 1:16
- 2:8
- 1:8
- 8:1
Water
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Answer
1:8
Reason — One atom of Hydrogen has mass of 1 amu, while one atom of Oxygen has mass of 16 amu. One molecule of water contains 2 atoms of Hydrogen and 1 atom of Oxygen, so their mass ratio:
1 x 2 : 16 x 1 = 1 : 8
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