1. The rate of a reaction can be determined by measuring either the in concentra

Q: 1. The rate of a reaction can be determined by measuring either the in concentra

1. increase or decrease. 2. rate = -1/2[N2O5]/dt = +1/4[NO2]/dt rate of appearance of NO2 = 4/2*1.4= 2.8 M/min 3. as the time goes on the concentration of reactant(N2O5) decreases,so that rate of reaction decreases.

ID: 1011190 • Letter: 1

Question

1. The rate of a reaction can be determined by measuring either the in concentration of a product per unit time OR the in concentration of a reactant per unit time. 2. The decomposition of dinitrogen pentoxide (N20s) is described by the chemical equation below. 2 N20s (g) 4 NO2Cg) 020g) If the rate of disappearance of N20s is equal to 1.4 M/min at time zero, what is the rate of appearance of NO2 at time zero? 3. The rate of disappearance of N20s in the reaction above is 1.4 M/min at time zero. How would the rate of disappearance of N20s compare at 10 minutes? Simply indicate in relative terms.

Explanation / Answer

1. increase or decrease.

2. rate = -1/2[N2O5]/dt = +1/4[NO2]/dt

rate of appearance of NO2 = 4/2*1.4= 2.8 M/min

3. as the time goes on the concentration of reactant(N2O5) decreases,so that rate of reaction decreases.

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