Be sure to answer all parts. In a first-order decomposition reaction, 50.0% of a compound decomposes in 17.5 min. (a) What is the rate constant of the reaction? (round to four decimal places) k = 0.0396 min−1 (b) How long does it take for 66.0% of the compound to decompose? (round to one decimal place) t = min

Part b: study of equilibrium on solubility: mg(oh)2(s) ⇌ mg2+(aq) + 2 oh–(aq) cloudy clear (pink) 7. a. b. 8. a. b. 9. 10. 11. 12. when adding concentrated hydrochloric acid, how did the appearance of the equilibrium mixture change? the change in appearance indicated a shift in the point of equilibrium. in which direction did the equilibrium shift? (l) left (r) right explain your answer to question 7a. you should indicate which ion was added to or removed from the equilibrium mixture. when adding edta, how did the appearance of the equilibrium mixture change? the change in appearance indicated a shift in the point of equilibrium. in which direction did the equilibrium shift? (l) left (r) right explain your answer to question 8a. you should indicate which ion was added to or removed from the equilibrium mixture. upon heating in which direction is the equilibrium shifting? upon cooling in which direction is the equilibrium shifting? is the forward reaction a. endothermic explain your answers to questions 9, 10, and 11. (l) left (r) right (l) left (r) right b. exothermic

According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons

What produces wave a)sound b) heats c)transfer of energy d)vibrations