# What is the mass in milligrams of a 4.3*mol quantity of sodium metal?

Well one mole of sodium metal has a mass of $22.99 \cdot g$, so.....
So, $4.30 \cdot m o l$ has a mass of:
4.30*cancel(mol)xx22.99*cancel(g)*cancel(mol^-1)xx10^3*mg*cancel(g^-1)=??mg.