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\times 1000 $
C) $ N _{A} $
D) $ 55.55,N _{A} $
Show Answer
Answer:
Correct Answer: D
Solution:
$ d=\frac{M}{V} $ (d = density, M= mass, V =volume) Since d = 1 So, $ M=V $
18gm = 18ml 18ml = NA molecules (NA = avogadro’s no.) 1000ml $ =\frac{N _{A}}{18}\times 1000 $ = 55.555 NA.
