Which statement concerning relative rates of reaction is correct for the decomposition of phosphine?
4 PH3(g) → P4(g) + 6 H2(g)
a) The rate of disappearance of PH3 is 6/4 the rate of appearance of H2.
b) The rate of appearance of P4 is equal to the rate of appearance of H2.
c) The rate of disappearance of PH3 is 1/4 the rate of appearance of P4.
d) The rate of disappearance of PH3 is 4 times the rate of appearance of H2.
e) The rate of appearance of H2 is 6 times the rate of appearance of P4.