What is a formula mass example?

1 Answer
Jul 29, 2017

Answer:

#"Sodium carbonate"# has a formula mass of #105.99*g*mol^-1#. How do we arrive at this figure?

Explanation:

Well we take the weighted sum of the atomic masses involved in the formula, #Na_2CO_3#, and that is..........

#{2xx22.99(Na)+12.011(C)+3xx16.00(O)}*g*mol^-1#

#=105.99*g*mol^-1#.

From where did I get the individual atomic masses? Did I just know them off the top of my head?

Is this what you want? You may want to clarify......