Question #318cb

1 Answer
anor277
Sep 1, 2017

"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?

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