Question

I think it increases by 6 or does the exponent of a tell me how much it increases ?

[NO14 [NO][H2016 [NH3][O2]5 [NH31+10215 [NO]4+[H2016 E. K = [NH3]4+10215 The rate expression for a particular reaction is rate=k[A]2[8]. If the concentration of A is increased from 0.2 M to 0.8 M, the rate of the reaction will increase by which of the following factors? A. 2 B. 4 C. 6 D. 16 E. none of the above Which statement is true regarding the following equilibrium at 1273 K? C(s) + CO2(g): 2C0(g) Kp= 167.5 A. Kc = Kp. R There are more reactants than products at equilibrium

Answer 1

Given rate = k[A]^2 [B] A rightarrow Initial Concentration = 0.2 M A rightarrow Final Concentration = 0.8 M Reaction: 2A + B rightarrow Product I^st rate = k(0.2)^2 [B] 2^nd rate = k (0.8)^2 [B]. k and B are constant. Therefore ratio of two rates, 2^nd rate/1^st rate = k(0.8)^2 [B]/k (0.2)^2 [B] 2^nd rate/I^st rate = 0.64/0.04 2^nd rate/1^st rate = 16 Correct Answer is D. 16