alleryFrom the equation 2H2 + O2 -> 2H2O, the number of moles of H2O formed from 2 moles of H2 is:
A1
B4
C3
D2
Answer & Solution
Correct answer: D. 2
1. The equation shows 2 H2 + 1 O2 -> 2 H2O.
2. So 2 moles of H2 yield 2 moles of H2O.
3. Hence 2 moles of H2 give 2 moles of water.
4. (Assuming enough O2 is available.)
_Source: Selina Concise Chemistry ICSE Class 10, Ch 5 'Mole Concept and Stoichiometry'_
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