The density of air is 1.285 g/L at 25C. a. Calculate the mass of air if the volume is 2500 L. b. If the mass of air is 560 g, determine the corresponding volume of air. c. An air-filled balloon has a mass of 3.16 g and a circumference of 49.7 cm. If it is perfectly spherical, calculate the density of air. Is the air temperature above or below 25C? Explain your answer. Graph the data in the following table, using mass as the dependent variable and volume as the independent variable. Volume Mass (g) (L) 0.5 0.8995 2.0 3.598 3.5 6.297 5.0 8.995 6.5 11.694 8.0 14.392 a) Calculate the density of air using the slope of the line. b) Predict the mass of air at a volume of 9.5 L. c) Predict the volume of the air at a mass of 7.53 g. d) Why must the temperature be stated when determining density by this method?