Consider the substances H2O, KI, H2S, CH4. Which answer has the substances arranged in order of decreasing boiling point?

The correct answer should be "electrons orbit the nucleus in circular motions exactly as shown on the classic bohr model."

B"hf and f-"  is the correct answer took the test on edgenuity and got it right     

Hbr dissociates to form h+ and br-ca(oh)2 dissociates to form ca2+ and 2oh-the h+ and oh- react to form waterassuming the reactants are dissolved in water, the net reaction is h+ + oh- —> h2oif you’re asked to show all components of the reaction, the complete reaction is 2hbr + ca(oh)2 —> cabr2 + 2h2o