1) How many grams of CO are needed to react with an excess of Fe2O3 to produce 225.5 gFe? Numbers after symbols are subscripts u
nless there is a ^ to show it is an exponent. ........... Fe2O3(s) +3CO(g) -- > 3 CO2(g) + 2 Fe(s) ........... 2) Solid sodium reacts violently with water producing heat, hydrogen gas and sodium hydroxide. How many molecules of hydrogen gas are produced when 65.4 g of sodium are added to water? Numbers after symbols are subscripts unless there is a ^ to show it is an exponent. ............ 2 Na(s) +2 H2O(l) -- > 2 NaOH(aq) + H2(g) ...........
Noble gases are nonreactive, nonmetallic elements in group 18 of the periodic table. Noble gases are the least reactive of all elements. That's because they have eight valence electrons, which fill their outer energy level.
Condensation releases energy when water vapor condenses to form water droplets. Evaporation absorbs energy whenever it changes from liquid to gas, the heat from the sun heats the water up and absorbs energy.
