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Consider gases confined by a liquid, as ...

Consider gases confined by a liquid, as shown below.
Density of the liquid = `d."gmL"^(-1)`
`h_(1)` and `h_(3)` in mm and `p_(1), p_(2)` and `p_(3)` in mm Hg.

In terms of barometric pressure `(p_("atm"))P_(p)` is

A

`p_(1)`

B

`p_(2)`

C

`p_(3)`

D

`p_(1) + p_(2) + p_(3)`

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