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Butoxors [25]
3 years ago
12

someone please explain how to separate copper powder from a mixture containing copper and zinc powder !!

Chemistry
1 answer:
jarptica [38.1K]3 years ago
6 0

Answer:

by burning the mixture in an electrical furnace to a temp. 640 degree C. to melt both Zinc & Aluminum leaving copper oxide as a powder.

Explanation:

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C. 11 moles of N2O

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<h3>Explanation</h3>

2 H-H + O=O → 2 H-O-H

There are two moles of H-H bonds and one mole of O=O bonds in one mole of reactants. All of them will break in the reaction. That will absorb

  • E(Bonds broken) = 2 × 436 + 499 = 1371 kJ/mol reaction.
  • ΔH(Breaking bonds) = +1371 kJ/mol

Each mole of the reaction will form two moles of water molecules. Each mole of H₂O molecules have two moles O-H bonds. Two moles of the molecule will have four moles of O-H bonds. Forming all those bond will release

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Heat of the reaction:

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\Delta H_{\text{rxn}} is negative. As a result, the reaction is exothermic.

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