A sample of gas placed in a flask attached to an open-end mercury manometer shown below. The difference in the height of the mercury between the two arms (h in the figure) is 76mm. If the external atmospheric pressure is 765 torr, what is the pressure of the gas?
A. 6.73atm
B. 1.11atm
C. 8.45atm
D. 1.03atm
E. 0.907atm
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