EN Chemistry Hons
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What is the number of hydrogen atoms in a molecule of ethyne?
A) 6
B) 2
C8
D) 4

1. and 2. question: in which equation? or i don't understand you, 3. a), 4. c), 5. c), 6. b), 7. d), 8. d) if small number is underlined(behind symbol) , b) if big number is underlined(in front of symbol)9. what is underlined there? 10. c)