00:01
So for this problem, we've been asked to identify what type of substance is drawn here and what phase is drawn.
00:08
So i've drawn this box over on the left.
00:09
We have red and blue spheres.
00:12
Each of these represent a different type of element, a different atom.
00:16
And so because we have multiple elements here, both red and blue, we immediately know that this can't be an element.
00:23
Additionally, if we look at each individual molecule, so the red and the blue spheres join together, they're all identical.
00:30
One red, one blue, and there are four copies of them.
00:34
So we know it's not any type of mixture because they're all exactly the same.
00:38
That only leaves a pure compound, and in fact having more than one element type, as well as all the molecules being the same, is also indicative of being a pure compound.
00:49
Additionally, all of these molecules are spreading out into the available space.
00:55
They're not joined together by any type of intermolecular force, and so we would say that this is a gas.
01:02
For this one, we got a couple different things going on here.
01:06
We have, again, red and blue, different element types.
01:10
The interesting thing to note here is that they're not interspersed...