For wat reaction does the half-life get longer as the initial concentration increases?& Y? Here's choices?

a. Zero Order
b. first order
c. second order
d. none of them

Answer:
A. Zero order reactions take place at a steady rate. If you have more material, the time until half remains is greater.

For first order reaction, HalfLife=constant*ln(1/2), for ALL concentrations. I think the half-life decreases for second order, but I'd have to find a book or derive it...
d
b

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