Some Basic Concepts of Chemistry - Result Question 100

####38. The total number of electrons present in 18mL of water is

(1980, 1M)

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Solution:

  1. Considering density of water to be 1.0g/mL,18mL of water is 18g(1.0mol) of water and it contain Avogadro number of molecules. Also one molecule of water contain

2×( one from each H-atom )+8×( from oxygen atom )

=10 electrons. 

1.0 mole of H2O contain =10×6.023×1023

=6.023×1024 electrons. 



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