Consider the following reaction:

Question

6A + 2B 5C + 4D
Determine the following rates at a time when the rate of consumption of B is 2.5E-05 M/s.
a) rate of consumption of A
M/s
b) rate of formation of C
M/s
c) rate of formation of D
M/s
d) rate of reaction
M/s

Answer 1

We must guess when you don't include an arrow. -->
a) 2.5E-5 x (6/2) =
etc.

Answer 2

So, for the rate of formation of C, would it be 2.5E-5 x (5/4)?

Answer 3

No, the coefficients are 5C and 2B, the fraction is 5/2.