Question #318cb

1 Answer
Sep 1, 2017

Answer:

#"1 mole"# of stuff specifies #6.02214xx10^23# individual items of that stuff..........

Explanation:

And so #"1 mole"# of lithium specifies #6.02214xx10^23# individual lithium atoms, and this has a mass of #6.94*g#; i.e. we quote the equivalent mass of lithium metal as #6.94*g*mol^-1#. This concept of equivalence is one of the most important to grasp in chemistry.

For the reaction......

#2Li(s) + 1/2O_2(g) rarr Li_2O#

If approx. #14*g# of lithium reacts, how many oxygen molecules react, how many formula units of lithium oxide result, and what is the mass of lithium oxide?