How do you calculate the percentage of Cu in #CuSO_4#? What is the atomic weight (mass) of each element?

1 Answer
anor277
Dec 15, 2016

#"% element"# #=# #"Mass of element"/"Formula mass of compound"xx100%#

Explanation:

#%Cu# #=# #(63.55*g*mol^-1)/(159.61*g*mol^-1)xx100%=39.8%#

#%S# #=# #(32.06*g*mol^-1)/(159.61*g*mol^-1)xx100%=??%#

#%O# #=# #(4xx15.999*g*mol^-1)/(159.61*g*mol^-1)xx100%=??%#.

Should the elemental percentages sum to #100%#. Why?

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