00:01
In this question, they say the time for a chemical reaction t in minutes is a function of the amount of catalyst present, a, in milliliters.
00:09
So that t is a function of a.
00:12
In part a, they say if f of 5 equals 18, what are the units of 5? what are the units of 18? what does the statement tell us about the reaction? so if f of 5 is equal to 18, 5 is a very very.
00:31
Value of a.
00:34
So a is equal to 5, and a is in milliliters.
00:39
So the 5 is in millilers.
00:43
Now the 18, that is a value of t.
00:47
T is equal to 18, and that's being measured in minutes.
00:54
And so what does this mean? this means that if 5 milliliters of the catalyst is present, if 5 milliliters of the catalyst is present, it takes 18 minutes for the reaction to occur.
01:26
It takes 18 minutes for the reaction to occur.
01:36
And then we get to part b.
01:38
If f prime of 5 is negative 3, what are the units of 5? what are the units of negative 3? so b, f prime of 5 is negative 3.
01:52
Now again, this guy is a...