The pressure of a sample of gas is measured at sea level with an open-end mercury manometer. 12.1 cm Assuming atmospheric pressure is 760.0 mmHg, determine the pressure of the gas in the following units. (a) mmHg WebAssign will check your answer for the correct number of significant figures. Incorrect: Your answer is incorrect. (b) atm WebAssign will check your answer for the correct number of significant figures. Incorrect: Your answer is incorrect. (c) kPa WebAssign will check your answer for the correct number of significant figures.