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Effectus [21]
3 years ago
5

Într-un amestec de „x” molecule de hidroxid de amoniu NH4OH și 7 molecule de apă se găsesc 39 atomi de hidrogen. Valoarea lui „x

” este ......
3
4
5
Chemistry
1 answer:
Oliga [24]3 years ago
3 0

Answer:

\large \boxed{5}  

Explanation:

Molecules of NH₄OH do not exist.

If they did, however, here is how you might answer.

     Total H atoms = 39 H

                   -7H₂O =<u> 14     </u>

H atoms available = 25 H

Each "molecule" of NH₄OH contains five H atoms.

\text{No. of Molecules} =  \text{25 H} \times \dfrac{\text{1 molecule}}{\text{5 H}} = \textbf{5 molecules}\\\\\text{ The value of x is $\large \boxed{\mathbf{5}}$}

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2 years ago
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Explanation:

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When oxidation occurs, an element loses electrons and its oxidation number increases (becomes more positive). When reduction occurs, an element gains electrons and its oxidation number decreases or is reduced (becomes more negative).

H+ (oxidized or reduced) Answer 1 Choose...

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MnO4- is a strong oxidizing agent.

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Fe2+ (oxidized or reduced) Answer 4 Choose...

Oxidized

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6 0
3 years ago
What is the molality of a solution in which 0.42 moles aluminum chloride has been dissolved in 4200 water ?
madreJ [45]

Answer:

0.1 M

<h3>Explanation:</h3>
  • Molarity refers to the concentration of a solution in moles per liter.
  • It is calculated by dividing the number of moles of solute by the volume of solvent;
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<u>In this case, we are given;</u>

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  • Volume of the solvent, water as 4200 mL or 4.2 L

Therefore;

Molarity = 0.42 moles ÷ 4.2 L

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Thus, the molarity of the solution will be 0.1 M

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