What is the molecular geometry around a central atom that has four sigma bonds and one lone electron-pair ?

Calculate the concentration of all species in a 0.165 m solution of h2co3.

What is the solubility-product constant of barium sulfate, baso4, if a saturated solution is 1.03 ´ 10-5 m?

4. propanol and isopropanol are isomers. this means that they have a) the same molecular formula but different chemical properties. b) different molecular formulas but the same chemical properties. c) the same molecular formula and the same chemical properties. d) the same molecular formula but represent different states of the compound