The rate of decomposition of PH3 was studied at 871.00 °C. The rate constant was found to be 0.0565 s-¹. 4PH3 →→ P4 + 6H₂ 1st attempt See Periodic Table See Hint If the reaction is begun with an initial PH3 concentration of 0.95 M, what will be the concentration of PH3 after 10.50 s? M

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