Areaction in which a, b, and c react to form products is zero order in a, one-half order in b, and second order in c. by what factor does the reaction rate change if [a] is doubled (and the other reactant concentrations are held constant)?

There will be no change in rate.

Explanation:

Rate law says that rate of a reaction is directly proportional to the concentration of the reactants each raised to a stoichiometric coefficient determined experimentally called as order.

k= rate constant

x = order with respect to A  = 0

y = order with respect to B =

z=  order with respect to C = 2

Thus

Given : when [A] is doubled and the other reactant concentrations are held constant.

Thus the new rate law is

Thus the reaction rate would not change.

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i think its 100.

hope this !