For each of the following reactions, 20.0g of each reactant is present initially. Determine the limiting reactant and calculate the grams of product in parenthesis that would produced.
a) 4Al(s) + 3O2(g) ----> 2Al2O3(s) (Al2O3)
b) 3NO2(g) + H2O(l) -------> 2HNO3(aq) + NO(g) (HNO3)
c) C2H6O(l) _3O2(g) -----> 2CO2(g) + 3H2O(g) (H2O)