Determine the hydroxide ion concentration in a solution that is 0.00034 M Ca(OH)2.
Answer in units of M.

Who is better, messi or cristiano, i need this for a chemistry class. asap

How does changing the surface area increase the reaction rate of a chemical change

Which best explains the relationship between evaporation and temperature? a. a liquid evaporates slower at lower temperatures because the molecules are more spread apart and are not pushed as easily from the liquid’s surface. b. a liquid evaporates faster at lower temperatures because the attractions are decreased and more particles can escape the surface of the liquid. c. a liquid evaporates slower at higher temperatures because the vapor pressure of the liquid is higher, so fewer molecules can escape the surface. d. a liquid evaporates faster at higher temperatures because more particles have a higher speed and can overcome attractions in the liquid.