QUIZ 1. What is the best way to describe the pressure of a gas? a. The weight of the gas when it becomes liquid b. The force of the gas on a container c. The mass of one mole of a gas d. The force of the gas per a certain square area of a container Answer: d. Pressure of a gas is defined as its force per square area against a container, which is different depending on things like the temperature of the gas. 2. Pascal units are SI units involving what measurement? a. Pressure of a gas b. Force of a gas c. Weight of a gas d. Volume of a gas Answer: a. The Pascal unit or Pa of a gas is the pressure of a gas. In the measurement of air pressure at sea level, the pressure of air is 9.81 Pa. 3. What is the measurement known as a Pascal? a. One kilogram per meter squared of force b. One newton of force per meter squared c. One atmosphere at sea level d. One millimeter of mercury at sea level Answer: b. The definition of a Pascal is one newton of force applied over one meter squared. This is the SI unit of measurement for chemistry purposes and is abbreviated as Pa.
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