00:01
So in this problem, we're told that one mole of sand grains would cover texas several feet.
00:07
And we want to estimate how many with a few approximations.
00:11
So first we have that we're going to assume the sand is cube -shaped, and the edge is 0 .10 millimeters.
00:18
And so if we cube this, we'll get the volume, and that 0 .001 millimeters cubed.
00:25
And that's the volume of one single sand grain.
00:28
So we multiply that by avogadro's number, and we get the volume of one mole of sand grains, and that is 6 .02 times 10 to the 20th millimeters cubed.
00:43
So now we have our volume.
00:46
Next, we're going to need to find the area of texas, which is given as 268 ,601 meters squared, or miles squared...