 Okay, so it looks like we're back to our fluorine 19 Problems, so let's go. Let's just write for a 19 remember mass number for 19 It asks well, what's the wealth? What's the mass in AMU of this well? 19 this flooring Adam is 19 Um, we'll do it for that's home places And then it asked well, what's the mass in Dalton as well So if you want to do the conversion factor, so the mass and Dalton flooring 19 Adams and Graham so the four sick one and two you could do