For the reaction of the ammonium ion with nitrous acid, the net reaction isNH 4

Question

For the reaction of the ammonium ion with nitrous acid, the net reaction isNH4+(aq) + HNO2(aq) ? N2(g) + 2H2O(l) + H+(aq)If the initial concentration of nitrous acid is 1.00 M and, after 36.4 s has elapsed, the concentration of nitrous acid has fallen to 0.76 M, what is the average rate of the reaction over this time interval? Answer 0.021 M/s For the reaction of the ammonium ion with nitrous acid, the net reaction isNH4+(aq) + HNO2(aq) ? N2(g) + 2H2O(l) + H+(aq)If the initial concentration of nitrous acid is 1.00 M and, after 36.4 s has elapsed, the concentration of nitrous acid has fallen to 0.76 M, what is the average rate of the reaction over this time interval? For the reaction of the ammonium ion with nitrous acid, the net reaction isNH4+(aq) + HNO2(aq) ? N2(g) + 2H2O(l) + H+(aq)If the initial concentration of nitrous acid is 1.00 M and, after 36.4 s has elapsed, the concentration of nitrous acid has fallen to 0.76 M, what is the average rate of the reaction over this time interval? 0.021 M/s 0.021 M/s

Explanation / Answer

average rate = -d[HNO2]/dt = -(1-0.76)/36.4 = -0.0066 M/s ( -ve sign shows conc is decreasing)

hence option C is correct

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