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Fundamental and Derived Units

Hydrogen and ...

Question

Hydrogen and oxygen combines in the ratio of 1:8 by weight to form water (H2O). How many times an atom of oxygen must weigh the mass of hydrogen atom?

A

16 times the mass of a hydrogen atom

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B

1/16 times the mass of a hydrogen atom

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C

8 times the mass of a hydrogen atom

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D

1/8 times the mass of a hydrogen atom

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Solution

The correct option is D
1/8 times the mass of a hydrogen atom

Since hydrogen and oxygen combines in the ratio of 1:8 by weight to form water (H2O) hence, an atom of oxygen must weigh 8 times the mass of a hydrogen atom.

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Q. Question 2
Hydrogen and oxygen combine in the ratio of 1:8 by mass to form water. What mass of oxygen gas would be required to react completely with 3 g of hydrogen gas?

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