What mineral is this? fist-sized irregularly shaped piece. salmon-pink color with nonmetallic luster. two cleavage planes at 90 degrees to each other. has a hardness of 6. very abundant mineral.

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)

Which position represents spring in the southern hemisphere? a) b) c) d)

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer