Unit 2 Worksheet 2 - Measuring Pressure Flashcards | Quizlet Study with Quizlet and memorize flashcards containing terms like Problems 1 and 2. Calculate the pressure of the gas in the flask connected to the manometer. 1. Proom = 730 mmHg a) 84 and 127 b) 26 and 130 c) 95 and 95 2. Proom = 733 mmHg a) 95 and 41 b) 104 and 31 c) 96 and 138, What do we mean by atmospheric pressure? What causes this pressure?, How do we measure atmospheric pressure?