Which is a way that the model of the atom became stronger through new experiments? a. new technology allowed scientists to show that the atom is indivisible. b. it took new data to show that positive charge is not spread throughout an atom. c. by deflecting alpha particles, rutherford first observed the neutron. d. the neutron could not be detected until cathode-ray tubes were invented.

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

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

Find the mass, in grams, of 5.00*10^23 molecules of f2