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Chemical Engineering Practice Test: The Chemical Reaction Equation & Stoichiometry, Material Balances for Processes Involving Reaction and Multiple Units
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Avg score: 75% • Most missed: “A reactor supplied with CO2 and H2O, the product contains H2O and H2CO3, if the …”
A chemical reaction equation is a symbolic representation of a chemical reaction using chemical formulas and symbols.  A chemical reaction equation shows the reactants on the left and the products on the right, separated by an arrow. The reactants are the starting compounds, and the products are the final compounds.  A chemical equation must be balanced to ensure the law of conservation of mass. This means that the number of atoms on both sides of the equation must be equal.  A balanced chemical reaction equation shows the mole relationships of reactants and products. It often also... Show more
Chemical Engineering Practice Test: The Chemical Reaction Equation & Stoichiometry, Material Balances for Processes Involving Reaction and Multiple Units
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25 Questions

1. Ethane is supplied with chlorine in a reactor, how many independent element balances can you write?
2. Methane is at the rate 50 moles is supplied to a reactor with air at the rate 1000 moles, the reactor leaves O2, N2, CO2 and H2O, what is the percentage of CO2 in products?
3. A reactor is supplied with 5 moles of KNO3 and some H2SO4, if the extent of reaction is 2, how many moles of H2SO4 were supplied?
4. 10 moles of ethane is supplied with 49 moles of oxygen, what is the percentage of excess oxygen?
5. A reactor is supplied with 10 moles glucose and excess oxygen to produce CO2 and H2O, if the rate of products is 25 moles, what is the percentage of CO2 in the products?
6. xKMnO4 + yFeS + zH2SO4 -> xMnSO4 + wFe2(SO4)3 + uK2SO4 + zH2O, what is the value of x + y + z + w + u?
7. A reactor is supplied with a feed of composition 46% C3H7O4, 44% O2 and 10% N2, if 50% of the limiting reagent is converted into product, what is the percentage of C3H7O4 in the product?
8. wC3H7O4 + xO2 -> yCO2 + zH2O, what is the value of w + x + y + z?
9. 4 moles of CH4 and 4 moles of O2 are reacted, then what type of reactant CH4 is?
10. A reactor is supplied with 2 streams both at same rates, one has pure Cl2, and another has pure C2H6, if the product has 20% C2H5Cl and 80% HCl, what is the ratio of rate of feed and rate of product?
11. If 28 grams of N2 and 10 grams of H2 are reacted, how much NH3 will produce?
12. What is the percentage of excess air if 50 grams of air is in excess and 150 grams of air enters the process?
13. C2H4 + xO2 -> 2CO2 + yH2O, what is the value of x + y?
14. A reactor is supplied with 10 moles of O2 and 10 moles of H2, if the extent of reaction is 5, how many moles of water is produced?
15. A reactor is supplied with glucose and oxygen to produce 40% CO2, 60% H2O, what is the ratio of glucose reacted and products?
16. A reactor is supplied with 5 moles each of CH3OH and O2, and the following reactions occur, CH3OH + 1/2O2 -> CH2O + H2O and then CH2O + 1/2O2 -> CO + H2O, the conversion of methanol is 80% in first reaction, and conversion of CH2O is 50% in second reaction. How many moles of CO are produced?
17. The extent of a reaction is 10, and the stoichiometric coefficient of O2 is 2.5, if the moles of O2 entering the process is 45, what is the percentage of excess air?
18. A reactor is supplied with 25 moles of C, and it undergoes following reactions C + 0.5O2 -> CO and C + O2 -> CO2, if 13 moles of CO2 was produced and 5 moles of C remains unreacted, what are the number of moles of CO produced?
19. A reactor is supplied with 10 moles glucose and excess oxygen to produce 40% CO2, 60% H2O, what is the rate of products?
20. CH4 + 2O2 -> CO2 + 2H2O, what is the extent of reaction if only 50% of 96 grams of CH4 is consumed?
21. What is the percentage of excess air, if 10 moles of air entered the process and only 5 moles of that are required?
22. A reactor is supplied with 2 streams both at the rate 5 mole, one has 40% Cl2 and 60% N2, and another has pure C2H6, if the product has C2H5Cl, HCl and N2 at the rate 20 mole, what is the percentage of HCl in products?
23. 20 grams of NaOH is reacted with excess HCl, how much NaCl will it produce?
24. 20 grams of CaCO3 is heated, how much calcium oxide will produce?
25. A reactor is supplied with 10 mole of Hexane and some hydrogen to produce 20% methane, 30% propane and 50% butane, what is the rate of products?

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