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For a reaction A to B, the rate of react...

For a reaction `A to B`, the rate of reaction becomes twenty seven times when the concentration of A is increased three times. What is the order of the reaction?

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According to the data, `27r=k[3A]^n`
`27r//r=k[3A]^n//k[A]^n` or `3^3=3^n` or n=3
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