Question

1. How many moles of potassium are present in 4.23 x 1025 potassium atoms?

(show solution)
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Answer 1

70.26 moles

Step-by-step explanation:

1 mole of potassium will contain 6.02 x 10²³ atoms of potassium

6.02 x 10²³ atoms of potassium = 1 mole

4.23 x 10²⁵ atoms of potassium = 4.23 x 10²⁵ / 6.02 x 10²³

= 70.26 moles .