A) Flask II containing ozone has greater number of oxygen atoms as compared to flask I.
B) Flask I containing oxygen has greater number of oxygen atoms as compared to flask II.
C) Both flasks I and II have same number of oxygen atoms.
D) Number of atoms of oxygen cannot be calculated from the available data.
Correct Answer: A
Solution :
1 mole of \[{{\text{O}}_{\text{2}}}\] contains \[\text{2}\times \text{6}\text{.022}\times \text{1}{{\text{0}}^{\text{23}}}\]oxygen atoms 0.5 mole of \[{{\text{O}}_{\text{2}}}\] contains \[\text{2}\times \text{6}\text{.022}\times \text{1}{{\text{0}}^{\text{23}}}\times 0.\text{5}\] oxygen atoms i.e., \[6.022\times {{10}^{23}}\] oxygen atoms 1 mole of \[{{\text{O}}_{\text{3}}}\] contains \[3\times 6.022\times {{10}^{23}}\] oxygen atoms \[0.4\text{ mole}\] of \[{{\text{O}}_{\text{3}}}\] contains \[\text{3}\times \text{6}\text{.022}\times \text{1}{{\text{0}}^{23}}\times 0.4\] oxygen atoms i.e., \[7.2264\times {{10}^{23}}\] oxygen atoms Thus, flask II containing ozone has greater number of oxygen atoms as compared to flask I containing oxygen.
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