8. calculate the enthalpy change, ah, for the reaction:
h2o(s) → h2(g) + % o2(g)
use the following elementary reactions:
h2(g) + % o2(g) → h2o(l) ah = -285.9 kj
h2o(s) → h2o(1)
ah = 6.0kj

What two factors can affect the properties of a hydrocarbon? a. the number of its carbon atoms and the number of single bonds b. the number of its carbon atoms and the arrangement of its atoms c. the arrangement of its atoms and the number of its double bonds

Anitrogen atom and an oxygen atom combine chemically to form nitric oxide. what is nitric oxide?

Identify the limiting reactant when 9.65-g h2so4 reacts with 6.10-g of naoh.the equation is h2s04 + 2naoh = 2h2o + na2so4• what is the theoretical yield of na2so4, in grams? • how much of the excess reagent will remain after the reaction has been completed? • if 10.5-g of na2so4 are actually recovered experimentally, what is the percent yield?