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rusak2 [61]
2 years ago
10

How are they related "atom" "molecule"

Chemistry
2 answers:
Dahasolnce [82]2 years ago
8 0

Answer:

Atoms are given a different weight based on the number of protons and neutrons in the nucleus and electrons in the surrounding cloud. The same electromagnetic force that keeps a single atom together can also hold two or more atoms together to form a molecule, while numerous molecules join together to form matter.

Explanation:

zhenek [66]2 years ago
7 0

Answer:

mixture of atoms forms molecule

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Purification of chromium can be achieved by electrorefining chromium from an impure chromium anode onto a pure chromium cathode
mylen [45]

Answer:

696 h

Explanation:

Let's consider the reduction of Cr³⁺.

Cr³⁺(aq) + 3e⁻ → Cr(s)

We can establish the following relations.

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  • 1 mol of Cr is deposited when 3 moles of e⁻ circulate.
  • 1 mole of e⁻ has a charge of 96468 c (Faraday's constant).
  • 1 A = 1 c/s
  • 1 h = 3600 s

<em>How many hours will it take to plate 13.5 kg of chromium onto the cathode if the current passed through the cell is held constant at 30.0 A?</em>

13.5 \times 10^{3} gCr.\frac{1molCr}{52.0gCr} .\frac{3mol/e^{-} }{1molCr} .\frac{96468c}{1mol/e^{-}} .\frac{1s}{30.0c} .\frac{1h}{3600s} =696 h

3 0
3 years ago
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