00:01
In this video, we want to convert a drop of mercury to the number of atoms in that drop.
00:05
So we're told that the diameter is 1 .0 millimeters, which let's just convert to centimeters since we have density in terms of cubic centimeters.
00:15
So we know there's 1 ,000 millimeters is equal to 100 centimeters.
00:22
So 1 millimeter is like 0 .10 centimeters.
00:29
And then that means the radius is going to be half of the diameter, so 0 .050 centimeters.
00:37
Now the volume of the droplet, assuming it's a sphere, is going to be 4 thirds times pi times that radius cubed.
00:47
So 4 thirds times pi times 0 .050 centimeters cubed.
00:54
And then we can go ahead and evaluate that on our calculator.
00:57
So 0 .05 cubed, doing exponents first by order of operations, and then times pi times four divided by three, comes out to 0 .000 523 cubic centimeters.
01:19
All right, now we're given the density of the mercury is 13 .6 grams per centimeter cubed...