 Hello, this is Professor Nashaband. I'm here to show you how to calculate molecular weights using Spartan So I've got the built-in Spartan Upright here, so it already has my icons. I'm gonna go to a new build. It's handy to use the organic tab here So I've already done that and for the first one. I'm gonna do Hydrogen and so that's that's a convenient place to start. I'm gonna double-click in the middle here now the The yellow guy here defaults to another hydrogen. So I'm kind of done with H2 To get its molecular weight. I go to this blue icon called properties and there's the weight of 2.0 1 6 am you Let's see for Nitrogen, it's pretty similar what I'm going to do is choose that nitrogen with the three lines triple bond and Double-click here now. I don't want a hydrogen there. I want another nitrogen. So I'm gonna click on that and Let's see what its molecular weight says 28.014 Okay, there's two more that I can show you how to do one of them is just methane methane is kind of pre-built here So Because it's carbon with four hydrogens which those yellow lines default to so there's There's the molecular weight of Methane and There's one more which I'll show you which is propane now propane we start off with this same methane type Molecule but I'm gonna replace one of these hydrogens with another thing that looks just like that So there's now I have a two-carbon hydrocarbon and I'm gonna add a third and So that's propane and I just have to go to this information guy and it will tell me what the molecular weight propane is