# How many grams are in 34.5 moles of KBr?

Mar 25, 2018

Now the molar mass of potassium bromide is $119.0 \cdot g \cdot m o {l}^{-} 1$. How do I know this? Well, I have access to a Periodic Table that tells me the individual molar masses of atomic potassium, and atomic bromine. And by the way, you should have access to a Periodic Table as well. You will certainly be provided with a Periodic Table in every test of chemistry and fyzics you ever sit.
And so for the mass of $34.5 \cdot m o l$ quantity of this salt...we take the product...
34.5*molxx119.0*g*mol^-1=??*g...a tad over $4 \cdot k g$?