3 #160;O2 #160; #8594; #160;2 #160;O3As #160;per #160;stoichiometric #160;equation, #160;3 #160; #215; #160;22.4 #160;L #160; #160 ...

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Mole Concept and Avogadro's Number

Question

15% of oxygen is converted to ozone. The mass of ozone that can be prepared from 67.2 L of oxygen at NTP?

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Solution

$3 O_{2} \to 2 O_{3} A s p e r s t o i c h i o m e t r i c e q u a t i o n, 3 \times 22.4 L o f o x y g e n i s c o n v e r t e d t o 2 \times 22.4 L o f o z o n e B u t g i v e n 15 % o f o x y g e n i s c o n v e r t e d t o o z o n e . T h a t m e a n s 67.2 L o f o x y g e n u s e d \frac{15}{100} \times 67.2 = 10.08 L o z o n e i s p r o d u c e d . T h e m a s s o f o z o n e p r e s e n t i n 22.4 L = 48 g 10.08 L o f o z o n e m e a n s = \frac{48}{22.4} \times 10.08 = 21.6 g$

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