Consider the Redox Reaction of Nitric Acid and Copper:
Cu $\rarr$

Consider the redox reaction of nitric acid and copper:
Cu + HNO₃ $\rarr$ Cu(NO₃) ₂ + NO (acidic solution) If the coefficient of Cu is 3 in the balanced equation, what is the coefficient of HNO₃?

A) 4
B) 5
C) 7
D) 8
E) 10