10. The mass of an atom of sodium is 23 u. Calculate the number of sodium atoms in 1 mg. Take 1 u = 1.66 x 10-27 kg.
Answer is 2.62×10¹⁹
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10. The mass of an atom of sodium is 23 u. Calculate the number of sodium atoms in 1 mg. Take 1 u = 1.66 x 10-27 kg.
Answer is 2.62×10¹⁹
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