Answer:
<h3>The answer is 0.4 moles</h3>
Explanation:
To find the number of moles in a substance given it's number of entities we use the formula

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

We have the final answer as
<h3>0.4 moles</h3>
Hope this helps you
<span>calcium is not soluble in water because it reacts to water. It does not dissolve in it.
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Chemical compounds<span> tend to </span>dissolve more quickly in hot solvent than in cold solvent, t<span>he </span>solvent<span> molecules have </span>more<span> energy to pull the solute particles apart. Give an example of two liquids that are miscible.
https://www.studyblue.com/notes/note/n/chemistry/deck/938054
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They have a magnetic attraction.