 Okay guys, let's do this analysis of oxidation numbers, okay? So the first thing you want to know is that for ions like these two compounds are, or these two particles are, the overall thing, the overall particle is charge is equal to the charge that's shown on the ion, okay? So overall, it will equal negative one. So oxygen, when it's combined with something, like what we said in class and what your notes say, is always negative two, okay? So the real question here is what is the oxidation state of nitrogen, okay? How many oxygens do we have? We've got, excuse me, two of them, okay? And X is going to be the oxidation state of nitrogen, okay? I can do the other way too, you know? Yeah, I mean it's easier to do it that way because I set it equal to negative one. I mean actually, I usually do equations opposite where I put what's equivalent to it first, you know? But anyway, so let's just algebraically manipulate this. So we're figuring out what X is, right? So X minus four, because two minus two is minus four, equals minus one. And then when we pull that over, or we add four to both sides, okay? Four minus four is zero, minus one plus four is plus three. So the oxidation state of nitrogen in this compound is plus three, okay? If you're doing it anything, any other way, you're making it way harder than what it has to be, okay? So overall, this thing is negatively one-charged. It's oxygens in it, right? So those oxygens have a minus two charge, there's three of them, right? Add that to whatever n is, okay? So now what do we do? X minus six equals minus one. Add six to both sides. X or n equals plus five, okay? This is when people start coming and seeing me, too. And as you can see, today's the first day I really have had people come and see me this time. You'll see if you go look at the videos, how many more there are now until whenever, but before that. Because people are like, every class is a blow-off until this class, you know? And people think that it's going to be a blow-off until the end of the first test, and then the beginning of the second test, you know? Yeah, but it's easier when I tell you how to do it, right? Yeah. What about now? Well, yeah, you got to know algebra before you come and do this class, you know? That's the thing. That's what I find most people are struggling with, is that they're, you know, they're, whoever, that's why one of the first questions I ask you on your quiz one is, who taught you algebra and what grades you get in it, you know? So I'll know who's a good algebra teacher and who just gives grades, you know what I'm saying? And it's a very fast-paced course, yeah. Are we cool with this? Are there any questions? Can I cancel it out or shut it off?