Answer:
(a) Ratio of masses of dioxygen
that combines with fixed mass of dinitrogen are given below:
Fixed mass of
nitrogen = 14 g
(i) (ii) (iii)
(iv)
16 : 32 : 16
: 40
2 : 4 :
2 : 5 (Simple whole number ratio)
Thus, law of
multiple proportion is varified.
(b)
(i) \[1\,km=1km\times \frac{1000m}{1km}\times \frac{100cm}{1m}\times
\frac{10\,mm}{1\,cm}\]
\[={{10}^{6}}mm\]
\[1km=1km\times
\frac{1000m}{1km}\times \frac{1pm}{{{10}^{-12}}m}={{10}^{15}}pm\]
(ii) \[1mg=1mg\times
\frac{1g}{1000mg}\times \frac{1kg}{1000g}={{10}^{-6}}kg\]
\[1mg=1mg\times
\frac{1g}{1000mg}\times \frac{1ng}{{{10}^{-9}}g}={{10}^{6}}ng\]
(iii) \[1mL=1mL\times
\frac{1L}{1000mL}={{10}^{-3}}L\]
\[1mL={{10}^{-3}}\times
\frac{1d{{m}^{3}}}{1L}={{10}^{-3}}d{{m}^{3}}\]
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