Respuesta :

jcherry99

Answer:

Explanation:

1 mol of copper is 63.5 grams (Check with your periodic table)

x mol of copper is 21000 grams

You can do this with a proportion.

1/x = 63.5/21000                 Cross multiply

63.5 * x = 21000*1              Divide by 63.5

x = 21000 / 63.5

x = 330.71 mols.