00:01
We have to find the initial concentration given the conditions.
00:04
The concentration at time t, where time is 40 seconds, is 8 .50 times 10 to the minus 2 molar.
00:11
We have k, or the rate i should say, is 4 .30 times 10 to the minus 4 meters per second.
00:20
We're told that it's zero order, or a zero order rate reaction.
00:26
So this is the equation we're going to be using, where the concentration at time t is equal to negative kt plus the initial concentration.
00:35
So what we're going to do is we're going to rearrange this so that we have our initial concentration all by itself.
00:43
So all we have to do is just move that negative kt over.
00:47
So now we just put in all of our values.
00:49
We have 8 .50 times 10 to the minus 2 plus, and then we will have 4 .30 times 10 to the minus 4.
01:00
That will be times 40 .0...