(c) polar solutes were separated by hydrophilic interaction chromatography (hilic) with a strongly polar bonded phase. how would retention times be affected if eluent were changed from 80 vol% to 90 vol% acetonitrile in water?

(d) polar solutes were separated by normal-phase chromatography on bare silica using methyl '-butyl ether and 2-propanol solvent. how would retention times be affected if eluent were changed from 40 vol% to 60 vol% 2-propanol? (hint: see la..12.l. g-2.i.: a.)

Imagine that a new planet is discovered with two moons of equal mass: moon a and moon b. the mass of the new planet is greater than the combined mass of its moons. moon a is farther away from the new planet than moon b. what is the planet's gravitational pull on moon a compared to the planet's gravitational pull on moon b? the planet's gravity repels moon a with a greater force than it repels moon b, which is why moon a is farther away. the gravitational pull on moon b is greater than on moon a because moon b is closer to the new planet than moon a. the gravitational pull on moon b is greater than on moon a because moon b is farther away from the new planet than moon a. the gravitational pull on moon a is the same as the gravitational pull on moon b because distance does not affect the planet's gravity.