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In the balanced reaction: x Zn + y HNO3(dilute) -> a Zn(NO3)2 + b H2O + c NH4NO3, what is the sum (a + b + c)?
- 6
- 7
- 8
- 9
Correct answer: 8
Solution
The balanced equation is 4Zn + 10HNO3 -> 4Zn(NO3)2 + NH4NO3 + 3H2O, so a=4, b=3, c=1, giving a+b+c = 8.
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