A solution contains 58.5g of common salt in 360g of water. Calculate the total number of protons in the solution.
A
21×6.023×1023
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B
22.8×6.023×1023
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C
200×6.023×1023
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D
228×6.023×1023
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Solution
The correct option is D228×6.023×1023 58.5g of NaCl=58.5g58.5g/mol=1mol of NaCl
360g of H2O=360g18g/mol=20mol of H2O
Number of electrons in 1 formula unit of NaCl=11+17=28e− Number of electrons in 1 molecule of H2O=2+8=10 Number of electrons in 1 mol of NaCl=28×NA Number of electrons in 20 mol of H2O=200×NA So, the total number of electrons in the solution = 228NA