1. Calculate the enthalpy change for the reaction C2H4 (g) + H2(g) - C2H6 (g) delta H = ?
given the following delta H values. Water formed in all reactions is in the liquid phase:
a. delta H = -1410.9 kJ mol•C2H4 (g) for the combustion of C2H4 (g)

b. delta H = -1559.7 kJ mol1 C2H6 (g) for the combustion of CzH6 (g)

C. delta H+ = -285.3 kJ mol-1 H2O for the formation of water (1)

Which of the following best describes the formation of plasma?

Calculate the ratio of h+ ions to oh– ions at a ph = 7. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 7. are they the same? why or why not? record your comparison in table a. what is the concentration of h+ ions at a ph = 7? mol/l what is the concentration of oh– ions at a ph = 7? mol/l what is the ratio of h+ ions to oh– ions at a ph = 7? : 1

Isopropyl alcohol, (ch3)2choh, is a common solvent. determine the percent by mass of hydrogen in isopropyl alcohol. a) 6.71% h b) 13.4% h c) 25.0% h d) 53.3% h