 So let's do another one of these density of the liquid problems, but this time we won't do an unknown liquid We'll do probably the most dense liquid that you'll actually see in undergraduate chemistry. So the problem says calculate the mass in grams of 10.0 milliliters of mercury if the density of mercury is 13.6 grams per mil. So very dense liquid 13.6 grams per mil. And it says that the volume we've got is the same grams. So we're lucky. So that one's pretty easy because remember this is the same. This cancels out our units. So divided by one mil because we want grams on the top because grams is the mass number 10.0 mils. To cancel out, I'm just going to move that over. Both of these have 36 pigs. So 136 grams per 10 mils of mercury. Dense liquid I guess I should say. Heavy if you got a lot of it. Just like anything.