Avolumetric flask made of pyrex is calibrated at 20.0°c. it is filled to the 285-ml mark with 38.0°c mercury. after the flask is filled, the mercury cools and the flask warms so that the combination of mercury and flask reaches a uniform temperature of 32.0°c. the combination is then cooled back to 20.0°c. (the average volume expansion coefficient of mercury is 1.82 10-4(°c)−1.) (a) what is the volume of the mercury when it cools to 20.0°c? ml (b) at the temperature of 32.0°c, does the level of mercury lie above or below the 285-ml mark on the flask? above belowa volumetric flask made of pyrex is calibrated at 20.0°c. it is filled to the 285-ml mark with 38.0°c mercury. after the flask is filled, the mercury cools and the flask warms so that the combination of mercury and flask reaches a uniform temperature of 32.0°c. the combination is then cooled back to 20.0°c. (the average volume expansion coefficient of mercury is 1.82 10-4(°c)−1.) (a) what is the volume of the mercury when it cools to 20.0°c? ml (b) at the temperature of 32.0°c, does the level of mercury lie above or below the 285-ml mark on the flask? above below