5h202 + 2mno4 +6h+ yeilds 2mn2+ +6h20+5o2
in a titration experiment h202 reacts with aqueous mno4 as represented by the equation above. the dark purple kmno4 solution is added from a buret to a colorless acidified solution of h2o2 in a flask.
at a certain time during the titration, the rate of appearance of o2 was 1.0 x 10^-3 mol/l. what was the rate of disappearance of mno4, at the same time?

a) 6.0 x 10^3
b) 4.0 x 10^3
c) 6.0 x 10^4
d) 4.0 x 10^4