Q.
A 100 mL flask contained H2 at 200 torr, and a 200 mL flask contained He at 100 torr. The two flask were, then connected so that each gas filled their combined volume. Assuming no change in temperature, total pressure is
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a
300 torr
b
66.66 torr
c
150 torr
d
133.33 torr
answer is D.
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Detailed Solution
nH2=pVRT=20000RT,nHe=pVRT=20000RT∴nH2+nHe=40000RT Total volume =300mLp=nVRT=40000RTRT×300 =4003=133.33 torr
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