alleryPure water always contains hydrogen and oxygen in the mass ratio:
A1:2
B2:1
C8:1
D1:8
Answer & Solution
Correct answer: D. 1:8
1. Water from any source has the same composition.
2. Decomposing 9 g of it gives 1 g of hydrogen and 8 g of oxygen.
3. So the mass ratio is 1:8.
4. The answer is 1:8.
_Source: syllabus Science, Ch 9 'Atomic Foundations of Matter'_
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