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riadik2000 [5.3K]
3 years ago
12

I need help finding the formulas of these ionic compounds

Chemistry
1 answer:
AleksandrR [38]3 years ago
5 0
Li3PO4
Cs3N
KL
BaF2
BaO
Reaction of. An acid and a base so it consists of an cation and anion so then you take the name of the anion and then the name of the cation take the atomic symbols and depending on the group it’s in add the numbers ? I think x
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3 years ago
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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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#SPJ1

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Two substances, A and Z, are to be identified. Substance A can not be broken down by a chemical change. Substance Z can be broke
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Answer;

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Explanation;

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