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The decomposition of phosphine, PH3, follows first-order kinetics. 4PH3(g)P4(g)+6H2(g) The half-life for the reaction at 550C is 5.4 seconds. What percentage of phosphine remains after

The decomposition of phosphine, PH3, follows first-order kinetics. 4PH3(g)P4(g)+6H2(g) The half-life for the reaction at 550C is 5.4 seconds. What percentage of phosphine remains after 21.94 seconds

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