Question

A student started with 200mg of Cu(s) and put it through many chemical transformations. Mass of...

A student started with 200mg of Cu(s) and put it through many chemical transformations. Mass of Cu(s) at the end was found to be 0.1g.

Answer the following:

A. He should recover same mole of cu(s) at the end. yes or no?

B. What is the % recovery, he got?

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Answer #1

A) No.

Initial moles =

=0.00315 mol

Final moles =

=0.00157 mol

so both moles are not same.

----------------------------------------------------------

Percentage recovery =

= 50%

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