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 unless 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)