2. (2 points) A solution is prepared by adding 16.0 g of CH, OH to 90.0 g dH. O. What is the mole fraction of methyl alcohol in this solution? (HINT: When in doubt - get to moles, then make a fraction at lowest
ratio)

Select the correct answer. what was edwin hubble's contribution to the field of astronomy? a. he discovered variable stars. b. he proved that the heliocentric model accurately described our solar system. c. he found a relationship between the period luminosity and distance of stars. d. he proved that the universe is finite. e. he discovered that the universe was expanding.