Chemistry Chegg Worksheet

ENGR 1540 Worksheet 11 Chapter 4

1. How many metric tons of carbon are required to reduce 7.83 metric tons of Fe2O3 according to the following reaction?

2Fe2O3+3C→3CO2+4Fe

How many metric tons of iron are produced?

2. Ammonium nitrate, NH4NO3, will decompose explosively to form N2, O2, and H2O, a fact that has been exploited in terrorist bombings. What mass of nitrogen is formed by the decomposition of 2.6 kg of ammonium nitrate?

3. If 3.4 mol Al and 6.2 mol Fe2O3 are mixed, what is the limiting reactant?

2Al+Fe2O3→Al2O3+2Fe

4. If 8.4 moles of disilane, Si2H6, is combined with 15.1 moles of O2, which is the limiting reactant?

2Si2H6+7O2→4SiO2+6H2O

5. Generally, an excess of O2 is needed for the reaction Sn+O2→SnO2. What is the minimum number if moles of oxygen required to oxidize 7.3 moles of tin?

6. In the reaction of arsenic with bromine, AsBr5 will form only when excess bromine is present. Write a balanced chemical equation for this reaction. Determine the minimum number of moles of bromine that are needed if 9.6 moles of arsenic is present.

7. Ammonia gas can be prepared by the reaction

CaO(s)+2NH4Cl(s)→2NH3(g)+H2O(g)+CaCl2(s)

If 112 g of CaO reacts with 224 g of NH4Cl, how many moles of reactants and products are there when the reaction is complete?

8. The equation for one of the reactions in the process of turning iron ore into the metal is

Fe2O3(s)+3CO(g)→2Fe(s)+3CO2(g)

If you start with 2.00 kg of each reactant, what is the maximum mass of iron you can produce?

9. Copper reacts with sulfuric acid according to the following equation:

2H2SO4+Cu→CuSO4+2H2O+SO2

How many grams of sulfur dioxide are created by this reaction if 14.2 g of copper reacts with 18.0 g of sulfuric acid?

10. One of the steps in the manufacture of nitric acid is the oxidation of ammonia shown in this equation:

4NH3(g)+5O2(g)→4NO(g)+6H2O(g)

If 43.0 kg of NH3 reacts with 35.4 kg of O2, what mass of NO forms?