Some Basic Concepts of Chemistry - Result Question 8
####5. The number of water molecules is maximum in :
[2015 RS]
(a) 18 molecules of water
(b) 1.8 gram of water
(c) 18 gram of water
(d) 18 moles of water
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Solution:
- (d) No. of moles of water
In $1.8 g$ of $H_2 O=0.1$ moles
In $18 g$ of $H_2^{2} O=1$ moles
1 mole contains $6.022 \times 10^{23}$ molecules of water therefore maximum number of molecules is in 18 moles of water.
(a) Initially $\underset{1 g}{Mg}+\frac{1}{2} O_2 \longrightarrow MgO$
or
$ \begin{matrix} \frac{1}{24} \text{ mole } & \frac{0.56}{32} \text{ mole } \\
