i would say it option (D)
if u chang 40% to .40
.40/50
=.008= 8.0x10^-3
A first-order reaction is 40% complete at the end of 50 minutes. What is the value of the rate constant (in min^-1)?
A. 1.8 x 10^-2
B. 1.0 x 10^-2
C. 1.2 x 10^-2
D. 8.0 x 10^-3
E. none of these
how would i approach this problem?
i know that to find the rate constant, i could use the formula k=rate/reactants, but i don't have the reactants or anything...so i don't know what to do..
2 answers
Could you do something like this?
Reactants ==> Products
100 = reactants to 0 products initially.
Then if it is 40% complete, then
100-40 = 60 reactants and 40 products. And this has occurred in 50 minutes.
Reactants ==> Products
100 = reactants to 0 products initially.
Then if it is 40% complete, then
100-40 = 60 reactants and 40 products. And this has occurred in 50 minutes.
1 answer