The decomposition of phosphine, PH3, occurs according to the following chemical equation:
4 PH3(g) → P4(g) + 6 H2(g)
Initially, there is no P4 in the reaction chamber, but after 25 seconds, a concentration of 1.5 Ă— 10-2 mol/L is detected.
a) Calculate the average rate of reaction with respect to P4.
b) Calculate the rate at which PH3 is disappearing.