A) \[\frac{{{45}^{2}}}{{{18}^{2}}}\times 32\]
B) \[\frac{{{18}^{2}}}{{{45}^{2}}}\times 32\]
C) \[\frac{{{18}^{2}}}{{{45}^{2}}\times 32}\]
D) \[\frac{{{45}^{2}}}{{{18}^{2}}\times 32}\]
Correct Answer: A
Solution :
\[{{r}_{{{O}_{2}}}}=\frac{x}{18}mole/\sec \] Þ\[{{r}_{g}}=\frac{x}{45}mol/\sec \] \[{{M}_{g}}={{M}_{O}}_{2}{{\left( \frac{{{r}_{{{O}_{2}}}}}{{{r}_{g}}} \right)}^{2}}=32{{\left( \frac{x}{18}\times \frac{45}{x} \right)}^{2}}\] \[=32\times \frac{{{45}^{2}}}{{{18}^{2}}}\]
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