Recall the terms "specific enthalpy" and "enthalpy density" from the module on thermochemistry. how are they different and why must they be considered when choosing a fuel source? 2 engine "knock" is the sound an engine makes when gasoline ignites too soon in the engine cylinder (possibly due to low octane fuel). knocking may cause loss of power, overheating and engine damage knocking may be due to low octane fuel. why? what is meant by octane rating? (research! ) a. how could the composition of gasoline be altered to increase the ease of starting a car in cold weather? (research! ) b.
catalytic converter in your car's engine research what happens to pollutants in a 3. what are some specific environmental concerns that occur along the pathway of underground reserve to refined petroleum product? 4.

Bohr's model could only explain the spectra of which type of atoms? single atoms with one electron single atoms with more than one electron bonded atoms with one electron bonded atoms with more than one electron

Which best describes why nh4+ can form an ionic bond with ci-?

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