The gas phase decomposition of phosphine at 120 °C PH3(g)1/4 P4(g) + 3/2 H2(g)

is first order in PH3.

During one experiment it was found that when the initial concentration of PH3 was 0.0542 M, the concentration of PH3 dropped to 0.00851 M after 68.0 s had passed.

Based on this experiment, the rate constant for the reaction is
s^-1. (I need specific instructions on how to solve this problem with a simple scientific calculator please!!)

answer:

the reaction is type of combination reaction.

explanation:

on the product side, there are 2 molecules of bonded to fe   which means one atom of fe are combined two molecules of . so, balanced chemical equation becomes :

this reaction follows the reaction type of combination reaction. a combination reaction is defined as chemical reaction in which reactants combines together to form a single product.

the answer is yes

it has kinetic energy

reason

an object has kinetic energy when you stop the force carrying it, the object will stay in motion.

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