Question

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1. How many moles of potassium are present in 4.23 x 10^25 potassium atoms? (show solution)​

Answer 1

70.27 moles

Step-by-step explanation:

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

`n = (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{4.23 * {10}^(25) }{6.02 * {10}^(23) } \\ = 70.265780...`

We have the final answer as

70.27 moles

Hope this helps you