The term \( -\mathrm{dc} / \mathrm{dt} \) in a rate equation refers to: (a) the conc. of a react...

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The term \( -\mathrm{dc} / \mathrm{dt} \) in a rate equation refers to:
(a) the conc. of a reactant
(b) the decrease in conc. of the reactant with time
(c) the velocity constant of reaction
(d) None of these
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