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AysviL [449]
3 years ago
7

7.89 x 1021 particles is equal to how many moles?

Chemistry
1 answer:
MrMuchimi3 years ago
3 0

Answer:

<h2>0.013 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L} \\

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 =  \frac{7.81 \times  {10}^{21} }{6.02 \times  {10}^{23} }  \\  = 0.012973...

We have the final answer as

<h3>0.013 moles</h3>

Hope this helps you

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