# 3Cu2 (aq)4H20 2NOCu(OH)2(s)1. ЗСи(s) + 2NO; + 8H-2+2. Cu (aq) 20H (aq)Cu(OH)2 (s) CuO (s) H204. CuO(s)2H Cu2Cu2 (aq)Zn(s)(aq)H2OZn2 (aq)Cu(s)

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27) The cycle of copper reactions illustrates important principles of chemical reactions. The cycle begins with elemental copper, which in a first reaction is oxidized to copper(II) cation. Copper(II) is then carried through different solid forms. In the last step, copper(II) cation is reduced, the copper metal is regenerated, and the cycle is closed. The five key steps are (see attached picture). Assume that you want to carry out a sequence of cycle reactions.

How many grams of zinc metal are needed to completely regenerate 2.63g of copper in the fifth step in the cycle?

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Step 1

Given:

Mass of Cu = 2.63 g.

Step 2

Calculation for number of moles of Cu:

Step 3

Calculation for mass of Zn:

From the chemical reaction it is evident 1 mol Zn is needed to rege...

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