For the reaction A + B ® 2C which of the following statements is true?

B is consumed at the same rate that A is consumed
C is produced at the same rate A is consumed
both (a) and (b) are true
both (a) and (b) are false

Answer:
a)

Look at the equation. It is
A + B -----> 2C
In other words
1A + 1B ----> 2C

This means that for each molecule of A reacting, there is a molecule of B reacting and 2 molecules of C being produced. This confirms statement A, but makes statement B void, as the rate of production of C must be twice the rate of consumption of A.

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