9. a change in color when two solutions are mixed together is a clue that a
__has taken place.
a. chemical change
b. physical change
c. temperature change
d. change in state

What volume of a 2.00 m stock solution of naoh is needed to prepare 150. ml of 0.40 m solution?

Calculate the h3o+ concentration in a solution of acetic acid if the concentration of molecular acetic acid present at equilibrium is 9.97x10^-3 m and k for the dissociation is 1.86x10^-5. ch3cooh(aq)+h2o(> h3o^+(aq)+ch3coo^-(aq)

Why is soap used to remove grease? a. its nonpolar end dissolves the grease. b. it makes the water bond with the grease. c. it chemically bonds with the grease. d. its polar end dissolves the grease.correct answer for apex - a, its nonpolar end dissolves the grease.