A) 200 torr
B) 100 torr
C) 550 torr
D) 366 torr
Correct Answer: A
Solution :
Applying Boyle?s law \[{{\operatorname{P}}_{1}}{{V}_{1}}\,\,=\,\,{{P}_{2}}{{V}_{2}}\] for both gases \[\frac{500}{1000}\times 400=P\,\times 3\,\,\,\Rightarrow \,\,P=\frac{200}{3}\] \[600\times \frac{666.6}{1000}=P'\times 3\,\,\Rightarrow \,\,P'=\frac{400}{3}\]\[\Rightarrow \,\,\,\,{{P}_{T}}=P+P'=\frac{200}{3}+\frac{400}{3}=\frac{600}{3}=200\,\,torr\]
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