Caffeine is 4.9 times more soluble in propanol than in a salt-water solution. Assume you extracted 200 mg of caffeine from tea leaves into 80.00 mL of a salt-water solution. You then extracted this aqueous phase three times with 50.00 mL of propanol each time.
How much caffeine will be in the organic phase?

The molar mass of iron(fe) is 55.8 g/mol. what is the mass in grams of 2.25 moles of iron?

The equation below shows a chemical reaction. a + b + heat —> c + d according to the law of conservation of energy, which statement is true? a. the reactants absorb heat because they have less energy than the products. b. the products release heat because they have more energy than the reactants. c. the reactants generate heat because they have more energy than the products. d. the products require heat to form because they have less energy than the reactants.

Which of the following are in a chemical family a. ca, sc, k b. cu, ag, au c. so, ge, sb