What is calcium nitrate's atomic mass?

1 Answer
Feb 6, 2017

Answer:

The formula mass of #Ca(NO_3)_2# is #164.09*g*mol^-1#.

Explanation:

So how did we get that mass?

Well, in each formula units of #"calcium nitrate"# there is one atom of calcium, 2 atoms of nitrogen, and 6 atoms of oxygen. If I take the atomic masses (from where?) and sum them appropriately:

#"Formula mass of calcium nitrate"#

#=(40.1+2xx14.01+6xx15.999)*g*mol^-1#

#=??*g*mol^-1#. Sum them up and waddya get?

Do you have to remember these numbers?