Help Help please!!!
A manometer has a sample of gas in one end and is open to the atmosphere on the other end. The atmospheric pressure is 760 mm Hg. The difference in mercury levels is 60 mm (the mercury is lower on the side open to the atmosphere). What is the pressure of the gas?
Select one:
a. 700 mm Hg
b. 820 mm Hg
c. 760 mm Hg
d. 60 mm Hg

Question

Help Help please!!!
A manometer has a sample of gas in one end and is open to the atmosphere on the other end. The atmospheric pressure is 760 mm Hg. The difference in mercury levels is 60 mm (the mercury is lower on the side open to the atmosphere). What is the pressure of the gas?
Select one:
a. 700 mm Hg
b. 820 mm Hg
c. 760 mm Hg
d. 60 mm Hg

joannablackwelder · Answer

An open tube manometer measures the pressure of a gas as compared to atmospheric pressure by measuring the change in height of the liquid in between. The side that is lower has a higher pressure.

joannablackwelder · Answer

The height difference is the pressure difference.

joannablackwelder · Answer

So, the pressure of the gas is atmospheric pressure - height change. Make sense, @denisse18 ?

anonymous · Answer

i think B??

joannablackwelder · Answer

No, that's not what I get. Since the mercury is lower on the side of the atmosphere, the pressure of the atmosphere is higher than the pressure of the gas.

anonymous · Answer

so is D because not is  A,B and C

joannablackwelder · Answer

Hm, how do you know it's not A, B, or C?

anonymous · Answer

A and C is incorrect because a teacher told me, and you told me that the B is incorrect then only offer me the option is D

joannablackwelder · Answer

Hm, that's weird. Because I get A.....

anonymous · Answer

no A is incorrect