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Phosphine (PH3) decomposes into phosphorus and molecular hydrogen: 4PH3(g) → P4(g) + 6H2(g) Experiments show that...

Phosphine (PH3) decomposes into phosphorus and molecular hydrogen: 4PH3(g) → P4(g) + 6H2(g) Experiments show that this is a first-order reaction, with a rate constant of 0.0173 s-1 at 650°C. Identify each of the following statements about this reaction as true or false. (Use the drop-down menu and select "True" or "False" for each. You must get all 4 correct.)

The reaction PH3 → PH2 + H might be the rate-determining step in the mechanism of this reaction.

The rate constant would be greater than 0.0173 s-1 at 340°C.

The overall reaction could occur as a single elementary step.

The activation energy for the reaction cannot be determined without additional data.

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