JEE Main Chemistry question
Not in JEE Main or NEET syllabus
The density of gold is 19 g/cm³. If g of gold is dispersed in 1 L of water to give a sol having spherical gold particles of radius 10 nm, then the number of gold particles per mm³ of the sol will be
Answer: (D)
Solution
Total volume of gold dispersed . Volume of one spherical particle of radius is $π
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