All organisms need glucose or a source of_ to carry out basic life functions

Which of the following shapes would represent a molecule with two bonded atoms and 3 lone pairs on only one of them , trigonal planar , bent , trigonal pyramidal , linear

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?

Which is the solubility product expression for caf2(s)?  [ca2+]/[f–]2  [ca2+][f2–]  [ca]+[f]2  [ca2+][f–]2