The density of water is 1.00 g/ml at 4°c. How many water molecules are present in 2.36 ml of water at this temperature

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05-09-2018
Chemistry

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The density of water is 1.00 g/ml at 4°c. How many water molecules are present in 2.36 ml of water at this temperature

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Arclight Arclight · Answer 1 · 2018-09-12T14:16:44+02:00

The density of water is 1.00 g/ml at 4°C which means mass 1 ml of water 1 g, so, mass of 2.36 ml 1/2.36 g= 0.423 g.

Molecular mass of water is 18 g. As per mole concept, 1 mole of water i.e, 18 g water contains 6.023 X [tex]10^{23}[/tex] molecules. Therefore, 0.423 g water contains [tex]\frac{6.023X10^{23}X0.423 }{18} g[/tex]=0.141 X [tex]10^{23}[/tex] number of water molecules= 1.41 X [tex]10^{22}[/tex] number of water molecules.