Celina has a water sample that's contaminated with salt and microorganisms. which method should she use to purify the water ?

What type of reaction is zn + cucl2 → cu + zncl2?

Which of the following true? a_volcanoes and earthquakes often near the plate boundaries. b_volcanoes occur whereve there are tall mountains. c_earthquakes cause volcanoes in the same location to erupt violently d_volcanoes and earthquakes occur only where plates are colliding with each other

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