Question

total no. of electron present in 18 mL of water (density of water is 1g/mL) is

Answer 1

Desity of water is approximately 1 g/cc . So 18 ml of water weights 18 gm.

Weight = volume * density

Number of moles = weight/ molecular weight

So here in 18 gm water equal to 1 mole

So it contain 6.022*10^23 molecules ie avagadro number of molecules.

See just 18 drop of water contain this big amount of molecules so don't waste it

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