15. The volume of a Goodyear Blimp is 2.5 x 10^7L, which is occupied by 1.7 x 10^6 mol of
helium. What is the internal pressure of the blimp at 22°C?

All of the following are homogeneous mixtures except a) sugar dissolved in water. b) orange juice. c) coffee with cream. d) household vinegar. e) apple juice