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  • A 21 flask contains 0.4 g  and <img alt="\mathrm{0.6 g \; H_{2}}" src="http

A 21 flask contains 0.4 g \mathrm{O_{2}} and \mathrm{0.6 g \; H_{2}} at \mathrm{100 ^{\circ}C. } calculate the total pressure of the gas mixture in the flask ___

Option: 1

3.78


Option: 2

4.78


Option: 3

5.71


Option: 4

4.00


Answers (1)

best_answer

Total no. of moles of \mathrm{O_{2}} and \mathrm{H_{2}} in flask, 

\mathrm{\begin{aligned} & =\frac{0.4}{32}+\frac{0.6}{2} \\ & =0.3125 \end{aligned}}

\mathrm{\begin{aligned} \therefore P=\frac{n R T}{V} & =\frac{0.3125 \times 0.082 \times 373}{2} \\ & =4.78 \mathrm{~atm} \end{aligned}}

 

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Anam Khan

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