Some Basic Concepts Of Chemistry Question 317

Question: The number of water molecules in 1 litre of water is [EAMCET 1990]

Options:

A) 18

B) 18×1000

C) NA

D) 55.55,NA

Show Answer

Answer:

Correct Answer: D

Solution:

d=MV (d = density, M= mass, V =volume) Since d = 1 So, M=V

18gm = 18ml 18ml = NA molecules (NA = avogadro’s no.) 1000ml =NA18×1000 = 55.555 NA.



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