00:01
In this question, we're going to find the mass of a mixture of ethanol and benzene.
00:05
So we need to look at table 1 .5 to find the density of these two substances.
00:13
So we have ethanol.
00:15
Density is 0 .789 grams per centimeters cubed.
00:19
And benzene is 0 .80 gram per centimeter's cube.
00:22
So the mass is additive for the solution.
00:25
So we need to find the mass of both of the components in order to find the mass of the solution.
00:31
One millimeter is equal to one centimeter cubed and one liter is equal to a thousand milliliters.
00:38
So because one liter is equal to a thousand milliliters and we have one liter of the benzene, we can convert that to the milliliters benzene.
00:49
So of course, we have a thousand millimeters of the benzene.
00:53
So we need the units to match.
00:55
So we need to use the volume of benzene in milliliters, not liters.
01:03
So let's start with the ethanol.
01:05
We're going to convert from volume to mass using the density.
01:09
So we can just use density as a conversion factor...
