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Evgen [1.6K]
3 years ago
15

Circle the letter of each sentence that is true about ideal gases and real gases.

Chemistry
1 answer:
VMariaS [17]3 years ago
7 0
The answer is D.
Hope this helps
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Given the reaction: Ca + 2H2O → Ca(OH)2 + H2 What is the total number of moles of Ca needed to react completely with 4.0 moles o
DiKsa [7]

<u>Answer:</u> The number of moles of calcium metal required is 2.0 moles.

<u>Explanation:</u>

We are given:

Moles of water reacted = 4.0 moles

The given chemical reaction follows:

Ca+2H_2O\rightarrow Ca(OH)_2+H_2

By Stoichiometry of the reaction:

2 moles of water is reacted with 1 mole of calcium metal

So, 4.0 moles of water will react with = \frac{1}{2}\times 4.0=2.0mol of calcium metal

Hence, the number of moles of calcium metal required is 2.0 moles.

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Removal of the loosely bounded electron is defined by the ionization energy. Chlorine needs less energy to add electrons and has higher ionization power. Thus, option A is correct.

<h3>What is ionization energy?</h3>

The ability of an electron to accept or give electrons to another element in a chemical reaction by forming and creating bonds and the positive and negative charges has been defined by the ionization energy.

Magnesium has lower ionization energy than chlorine due to its large size and smaller nuclear charge. On the other hand, chlorine can easily add electrons to the valence shell which is almost full.

Therefore, option A. chlorine has higher ionization energy and can add electrons with minimum energy.

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Answer:

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Explanation:

I'm in high-school done this long time ago

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