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Shkiper50 [21]
2 years ago
13

!!!PLEASE HELP!!!!

Chemistry
1 answer:
Lynna [10]2 years ago
4 0

Answer: B

Explanation: molarity = concentration c= n/V = 0.5 mol/ 0.05 l = 10 mol/l

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1.5 moles of Al is how many<br> atoms?
aev [14]

Answer:

<h2>9.03 × 10²³ atoms </h2>

Explanation:

The number of atoms of Al can be found by using the formula

<h3>N = n × L</h3>

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

N = 1.5 × 6.02 × 10²³

We have the final answer as

<h3>9.03 × 10²³ atoms</h3>

Hope this helps you

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Sort these species into isoelectronic groups. It doesn\'t matter which group goes in which box, so long as the correct species a
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Answer : The isoelectronic groups are:

He,Be^{2+},Li^{+}

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Explanation :

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  • The element is beryllium. The number of electrons are 4. The number of electrons in Be^{2+} = 4 - 2 = 2
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  • The element is neon. The number of electrons are 10.
  • The element is sulfur. The number of electrons are 16. The number of electrons in S^{2-} = 16 + 2 = 18
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The isoelectronic groups are:

He,Be^{2+},Li^{+}

N^{3-},Mg^{2+}

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Answer:

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idk but hope it helps

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