Some Basic Concepts of Chemistry - Result Question 21
####22. The number of significant figures for the three numbers $161 cm, 0.161 cm, 0.0161 cm$ are
(a) 3,4 and 5 respectively
(b) 3, 4 and 4 respectively
[1998]
(c) 3, 3 and 4 respectively
(d) 3, 3 and 3 respectively
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Solution:
22.4 L & 11.2 L & 0 & \text{ initial } \\ =1 mole & =0.5 mole & & \\ 1-0.5 & 0.5-0.5 & 2 \times 0.5 & \text{ final } \end{matrix} $
Moles of $HCl$ formed $=2 \times 0.5=1$
