Question

Calculate the total number of potassium ions present in 2g of potassium chloride

Answer 1

Dear Student

Potassium chloride is KCl.

Molar mass = Atomic mass of K + atomic mass of Cl
Molar mass = 39 + 35 = 74g

74 g of KCl contains = 6.023 x 10²³ ions of K.
1 g of KCl contains = 6.023 x 10²³ / 74 ions of K.
2 g of KCl contains = (6.023 x 10²³ x 2)/74 = 0.163 x 10²³ ions of Potassium.

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