00:01
The problem is concerning ice tea.
00:03
We're told that we use one teaspoon, which is 2 .50 grams of ice tea mix to make one eight ounce glass of tea.
00:23
And the average, if i can read this, the average glass contains 10 milligrams of caffeine, which i'm going to just abbreviate cf to say, me sometime.
00:47
And then we're going to get the mass percent of caffeine in one glass.
01:02
Okay, so let's go ahead.
01:04
I want to get grams.
01:05
What i need to do is i need to get grams of caffeine, and we're going to divide that by grams of solution, which is our t.
01:18
We'll multiply that by 100 grams of caffeine is easy we're simply going to go 0 .010 milligrams per glass times 1 ,000 milligrams per gram equals i'm going to express that to scientific notation.
01:50
0 .01 divided by 1 ,000 is 1 .0 times 10 to the minus 5 grams of caffeine.
02:05
Next, our solution, we have eight ounces is one glass.
02:19
So let me figure out what my ounces here.
02:22
I'm going to go look up a conversion factor.
02:26
And i think i'll go, let's find mills per ounce.
02:39
What just happened there? m .ls per ounce...