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Ket [755]
3 years ago
10

Which type of bond is present in hydrogen sulfide (H2S)? The table of electronegativities is given.

Chemistry
1 answer:
Paraphin [41]3 years ago
6 0

nonpolar covalent bond (with LD force)

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HELP MULTIPLE CHOICE QUESTION!!!! I HAVE A QUIZ!!!!
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Answer:

A) not for 100%

Explanation:

sorry if it's wrong

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Which of the following explains this observation?
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2 years ago
How much (Q) heat is needed to melt 35 g of iodine? Hf = 61.7 J/g.
aev [14]

Taking into account the definition of calorimetry and latent heat, a heat of 2159.5 J is needed to melt 35 g of iodine.

<h3>Calorimetry</h3>

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

<h3>Latent heat</h3>

Latent heat is defined as the energy required by a quantity of substance to change state.

When this change consists of changing from a solid to a liquid phase, it is called heat of fusion and when the change occurs from a liquid to a gaseous state, it is called heat of vaporization.

The heat Q that is necessary to provide for a mass m of a certain substance to change phase is equal to

Q = m×L

where L is called the latent heat of the substance and depends on the type of phase change.

<h3>Heat needed to melt iodine</h3>

In this case, you know:

  • m= 35 g
  • L=61.7 \frac{J}{g}

Replacing in the definition of latent heat:

Q= 35 g× 61.7 \frac{J}{g}

Solving:

<u><em>Q=2159.5 J</em></u>

Finally, a heat of 2159.5 J is needed to melt 35 g of iodine.

Learn more about calorimetry:

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2. zinc (III) chlorate →
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Explanation:

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No it is redistributed and the state changes to gas and liquid
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