 Okay, so let's do another one of these. Write the chemical formula for the molecule that is shown and it says methionine and amino acid and it gives us the number of carbons is 5, the number of hydrogens is 11, the number of nitrogens is 1, the number of oxygens is 2, and the number of sulfurs is 1. So remember what we said, we're going to put the atom and then the number as a what? Subscripts. Right? Okay, unless we have a what as the number, a 1, because then that subscript is understood so we don't write it at all, okay? So let's just go ahead and do this one as practice, okay? So first thing we're going to write is a what? C. Very good. And then below that? It's hydrogen. A 5, right? And then after that 5, what are we writing? H. H and then below? 11. 11, very good, because that's that one, right? And then a what? N. N. That's alright. N. And then, but we don't write N, okay? Because if we didn't put that in, we wouldn't know that there was any N's in there, okay? So we have to put it there just to indicate that it's there, but we don't put a 1 afterwards, okay? Does everybody understand what we're doing? Okay, so now what do we put? O. O. And do we put a subscript on that one? Yes. And what is that? Two. Two. And what's last? S. S. And do we have a subscript on that one? No. Okay, why not? Because it's a one. Just a one, and the subscript is understood, right? Right, right. Okay, are there any questions on this? I have a question. Yeah? Does it matter what water they're in? Yeah, so yes it does. So you always want to put carbons first, okay? Then hydrogens, okay? This is just, there's a specific order because organic chemists, these are organic molecules. They have carbonists, like for organic chemists, the most important element. And all organic chemicals have a large amount of hydrogen, so you usually put those next. And then from then on, you want to do alphabetizing, okay? Oh, okay. Yeah, no, it's an interesting thing, right? Okay, any questions on that? No. Okay.