00:02
So let's say we're given 75 tons of coal.
00:06
And this coal is going to be 3 % sulfur by mass.
00:11
And when we burn this coal, it's going to create so2 from the sulfur that's burned.
00:21
And then at the top of these buildings, we have these little devices.
00:27
And they're going to capture the pollution in the air.
00:31
And they're going to take out the so2.
00:38
So at the end of the day, these sulfur dioxide capturing little scrubbers, they capture 3 .9 tons of sulfur dioxide.
00:49
How efficient are these scrubbers at capturing sulfur? so first, we're going to need to find out how much sulfur we actually have.
01:02
So we're going to do 3 % of the 75 tons.
01:06
So, do 75 times 0 .03.
01:14
And then i'll give us 2 .25.
01:17
So that's how many tons of sulfur are in 75 tons of coal.
01:25
So next we're gonna need to find out how much sulfur dioxide we have.
01:30
So if we have 2 .25 tons of sulfur, that'll be right here.
01:35
And this one sulfur molecule.
01:39
So we need the atomic mass of so2.
01:44
So so2 is equal to 64 grams per mole.
01:52
If you see here, sulfur is 32 grams a mole...