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प्रश्न
How many moles of solute particles are present in one liter of 10-4 M potassium sulphate?
उत्तर
In 10-4 M K2SO4 solution, there are 10-4 moles of potassium sulphate.
K2SO4 molecule contains 3 ions (2K+ and 1 SO42-)
1 mole of K2SO4 molecule contains 3 × 6.023 × 1023 ions
10-4 mole of K2SO4 contains 3 × 6.023 × 1023 × 10-4 ions
= 18. 069 × 1019
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