If the Average Rate of Decomposition of PH₃(g)is 3 $\rightarrow$ 2P(g)+ 3H₂(g),the Unique Average Reaction Rate Is
A)3

If the average rate of decomposition of PH₃(g) is 3.2 (mol PH₃) .L^-1.min^-1 for the reaction 2PH₃(g) $\rightarrow$ 2P(g) + 3H₂(g) ,the unique average reaction rate is

A) 3.2 mol.^-1.min^-1.
B) 2.1 mol.^-1.min^-1
C) 1.6 mol.^-1.min^-1
D) 4.8 mol.^-1.min^-1
E) 6.4 mol.^-1.min^-1