A 10-Mm Cube of Copper Metal Is Placed in 250 $\rarr$

A 10-mm cube of copper metal is placed in 250 mL of 12 M nitric acid at 25°C and the reaction below occurs: Cu(s) + 4H⁺(aq) + 2NO₃^-(aq) $\rarr$ Cu²⁺(aq) + 2NO₂(g) + 2H₂O(l) At a particular instant in time, nitrogen dioxide is being produced at the rate of . At this same instant, what is the rate at which hydrogen ions are being consumed?

A) 1.3 × 10^-4 M/min
B) 5.2 × 10^-4 M/min
C) 2.6 × 10^-4 M/min
D) 1.0 × 10^-3 M/min
E) 6.5 × 10^-5 M/min