MHT CET · Chemistry · States of Matter
A neon-dioxygen mixture contains \(64 \mathrm{~g} \mathrm{O}_2\) and \(160 \mathrm{~g} \mathrm{Ne}\). If the total pressure is \(25 \mathrm{bar}\), calculate the partial pressure of dioxygen.
- A 5 bar
- B 7.5 bar
- C 10 bar
- D 20 bar
Answer & Solution
Correct Answer
(A) 5 bar
Step-by-step Solution
Detailed explanation
\(\begin{aligned} & \mathrm{n}_{\mathrm{O}_2}=\frac{64}{32}=2 \mathrm{~mol} ; \mathrm{n}_{\mathrm{N}_{\mathrm{e}}}=\frac{160}{20}=8 \mathrm{~mol} \\ & x_{\mathrm{O}_2}=\frac{\mathrm{n}_{\mathrm{O}_2}}{\mathrm{n}_{\text {Total }}}=\frac{2}{2+8}=\frac{2}{10}=0.2 \\ & \mathrm{P}_{\mathrm{O}_2}=x_{\mathrm{O}_2} \times \mathrm{P}_{\text {Total }}=0.2 \times 25=5 \mathrm{bar}\end{aligned}\)
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