(Solved): 1.Calculate the mass percent for each element in the following: C5H13O4N2 2. Calculat ...

1.Calculate the mass percent for each element in the following: ${\mathrm{C}}_5{\mathrm{H}}_{13}{\mathrm{O}}_4{\mathrm{N}}_2$ 2. Calculate the amount of excess reactant that was used during the reaction and how much was left unreacted. ${\mathrm{Fe}}_2{\mathrm{O}}_{3(\mathrm{s})}+{\mathrm{CO}}_{(\mathrm{g})}\dots \dots {\mathrm{Fe}}_{(\mathrm{s})}+{\mathrm{CO}}_{2(\mathrm{g})}$ 3. A student performed the following reaction in the lab. Her professor told her she should be able to achieve a minimum of $80.0\%$ yield for her product, $\mathrm{ZnO}$. The student starts with 25.0 grams of zinc sulfide in excess oxygen gas. What is the minimum mass of zinc oxide the reaction needs to produce to achieve an $80.0\%$ yield? $\mathrm{ZnS}(\mathrm{s})+{\mathrm{O}}_{2(\mathrm{g})}\dots {\mathrm{ZnO}}_{(\mathrm{s})}+{\mathrm{SO}}_{2(\mathrm{g})}$