Fe2O3(s) + CO(g) Fe(l) + CO2(g) How many grams of Fe2O3(s) will be required to produce 1.90 moles of Fe(l)?

1) which of the following is the best example of a physical change? a) sugar dissolving in tea b) firefly glowing 2) in the combustion of ethane, what is/are the reactants? c2h6 + o2 ==> co2 + h2o a) c2h6 and o2 b) co2 and c2h6