For which of the following reactions would the AHfº for the reaction be labelled AHO? (a) Al(s) + 3/2 H2(g) + 3/2 O2(g) → Al(OH)3(s)
(b) 2Al(s) + 3H2(g) + 302(g) → 2Al(OH)3(s)
(c) 1/2 N2O(g) + 1/4 O2(g) NO(g)
(d) CaO(s) + SO2(g)
CaSO3(s)

The diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

Compare and contrast solutions and suspensions

Steam reforming of methane ( ch4) produces "synthesis gas," a mixture of carbon monoxide gas and hydrogen gas, which is the starting point for many important industrial chemical syntheses. an industrial chemist studying this reaction fills a 1.5 l flask with 3.5 atm of methane gas and 1.3 atm of water vapor at 43.0°c. he then raises the temperature, and when the mixture has come to equilibrium measures the partial pressure of carbon monoxide gas to be 1 .0 atm. calculate the pressure equilibrium constant for the steam reforming of methane at the final temperature of the mixture. round your answer to 2 significant digits.