 Okay guys, let's try this one now. How much does one, essentially one mole of boron weigh in grams? So we know of course from the periodic table that boron's atomic mass is 10.811 AMU. Now we know our conversion factor between AMU and grams. So let's figure that out. So moles of boron have the mass of one boron at, just one boron at. But we know that a mole is a number and that number is 6.022 times 10 to the 24th. So we want to figure out what's the mass of one mole. We have to multiply it by 6.022 times 10 to the 23th. We should get grams per mole at the end. So let's go ahead and calculate that. So we get something very similar, grams per mole, because we've got of course here, grams and here, mole. Notice how close this number is to the AMU. So we can usually just approximate this as saying one mole of boron equals one to one grams.