pachia87

I have a question here...umm i don't really understand how you would find total mass of a solution or substance...and with total mass in mind what is the difference between total mass, molar mass, molarity, and moles? I want to know what equations to use to find these four things. My teacher doesn't tell us that this equation is for this and that, so i'm having a hard time understanding which equation use. So if anyone can please help me then i would greatly appreciate it...