Predict the conditions (high temperature, low temperature, all temperatures, or no temperatures) under which each reaction is spontaneous.

a. H2O(g) ? H2O(l)

b. CO2(s) ? CO2(g)

c. H2(g) ? 2 H(g)

d. 2 NO2(g) ? 2 NO(g) + O2(g) (endothermic)

Which statement correctly describes metallic bonds? a. they form when certain atoms lose electrons and other atoms gain electrons. b. they involve an attraction between anions and cations. they always involvpoth a metal and a nonmetal. d. they can only form between atoms of the same element. e. they form because electrons can move freely between atoms.

Draw the structure for 5-isopropyl-2-methyl-3-nonene

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.