For $A products$ , the concentration of A at $t = 0, 10, 20, 30 s$ is $0.800, 0.640, 0.512, 0.4096 M$ (a smooth, convex decay). Select the correct statement(s).

AThe instantaneous rate at $t = 0$ is greater than $0.0160 M s^{- 1}$ .
BThe average rate over $0$ - $10$ s is greater than over $10$ - $20$ s.
CThe average rate over $0$ - $30$ s is $0.0130 M s^{- 1}$ .
DThe instantaneous rate at $t = 30$ s is greater than the average rate over $20$ - $30$ s.

Answer: A, B, C

Interval averages are

0.0160

0.01280

0.01024 M s^{- 1}

(decreasing), and the

0

30

s average is

(0.800 - 0.4096) /30 = 0.0130

. For a convex decaying curve the tangent at the start of an interval is steeper than the chord, so the initial rate exceeds 0.0160, while the rate at the end of the

20

30

s interval is smaller than its average.

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For A​products, the concentration of A at t=0,10,20,30 s is 0.800,0.640,0.512,0.4096 M (a smooth, convex decay). Select the correct statement(s).

Answer: A, B, C

More questions on Rate of reaction, rate law, order and molecularity

For $A products$ , the concentration of A at $t = 0, 10, 20, 30 s$ is $0.800, 0.640, 0.512, 0.4096 M$ (a smooth, convex decay). Select the correct statement(s).