For the reaction 3 A + 4 B → 2 C + D, what is the magnitude of the rate of change for [C] when [D] is increasing at 2.7 M/min?

Answer 1

For a question like this, we can use the coefficients as a molar ratio. What this means is that when two moles of C are made, one mole of D is made. With this in mind, we can see that the concentration of C will increase twice as much as the concentration of D, so the rate of change for C would be 5.4 M/min.