1. Given the balanced equations representing two chemical reactions:

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1 Name: 1. Given the balanced equations representing two chemical reactions: Cl2 + 2NaBr 2NaCl + Br 2 2NaCl 2Na + Cl2 Which type of chemical reactions are represented by these equations? A) single replacement and decomposition B) synthesis and double replacement C) single replacement and double replacement D) synthesis and decomposition 2. Which balanced equation represents a single-replacement reaction? A) MgCl2 + 2AgNO3 2AgCl + Mg(NO3)2 B) Mg + 2AgNO3 Mg(NO3)2 + 2Ag C) MgCO 3 MgO + CO2 D) 2Mg + O 2 2MgO 3. In which type of reaction do two or more substances combine to produce a single substance? A) single replacement B) synthesis C) decomposition D) double replacement 4. Which equation represents a decomposition reaction? A) 2H 2(g) + O2(g) 2H 2O(l) B) Cu(s) + 2AgNO 3(aq) 2Ag(s) + Cu(NO3)2(aq) C) CaCO 3(s) CaO(s) + CO2(g) D) KOH(aq) + HCl(aq) KCl(aq) + H 2O(l) 5. Base your answer to the following question on Given the balanced equation representing a reaction: 4Al(s) + 3O 2(g) 2Al 2O3(s) Which type of chemical reaction is represented by this equation? A) single replacement B) synthesis C) substitution D) double replacement

2 6. Which balanced equation represents a redox reaction? A) 2KClO 3(s) 2KCl(s) + 3O2(g) B) H2SO 4(aq) + 2KOH(aq) K2SO 4(aq) + 2H 2O( ) C) CuCO 3(s) CuO(s) + CO2(g) D) AgNO 3(aq) + KCl(aq) AgCl(s) + KNO 3(aq) 7. Given the balanced equation: AgNO 3(aq) + NaCl(aq) NaNO 3 (aq) + AgCl(s) This reaction is classified as A) single replacement B) synthesis C) double replacement D) decomposition 8. Which equation represents a double replacement reaction? A) 2 Na + 2 H2O 2 NaOH + H 2 B) CaCO 3 CaO + CO 2 C) CH O 2 CO H 2O D) LiOH + HCl LiCl + H 2O 9. 2 SO2(g) + O2(g) «2 SO3(g) What type of reaction is shown above? A) synthesis B) double replacement C) decomposition D) single replacement 10. Which two solutions, when mixed together, will undergo a double replacement reaction and form a white, solid substance? A) KCl(aq) and AgNO3(aq) B) NaCl(aq) and LiNO3(aq) C) NaNO 3(aq) and AgNO3(aq) D) KCl(aq) and LiCl(aq)

3 11. Base your answer to the following question on Given the balanced equation representing a reaction: C3H8(g) +5O2(g) 3CO2(g) + 4H 2O(g) What is the total number of moles of O 2(g) required for the complete combustion of 1.5 moles of C3H8(g)? A).30 mol B) 1.5 mol C) 4.5 mol D) 7.5 mol 12. Given the balanced equation representing a reaction: 2CO(g) + O2(g) 2CO2(g) What is the mole ratio of CO(g) to CO 2(g) in this reaction? A) 1:1 B) 1:2 C) 2:1 D) 3:2 13. Given the balanced equation: CaCO3(s) + 2HCl(aq) CaCl2(aq) + H2O( ) + CO2(g) What is the total number of moles of CO2 formed when 20. moles of HCl is completely consumed? A) 20. mol B) 10. mol C) 40. mol D) 5.0 mol 14. Base your answer to the following question on Given the balanced equation: 2 C4H10(g) + 13 O2(g) 8 CO2(g) + 10 H2O(g) What is the total number of moles of O 2(g) that must react completely with 5.00 moles of C4H10(g)? A) 20.0 B) 26.5 C) 10.0 D) Given the reaction: 4 Al + 3 O2 2 Al2O3 What is the total number of moles of aluminum oxide that can be formed when 54 grams of aluminum reacts completely with oxygen? A) 1.0 mole B) 2.0 moles C) 3.0 moles D) 4.0 moles

4 16. Base your answer to the following question on Given the balanced equation: 2C + 3H 2 C2H6 What is the total number of moles of C that must completely react to produce 2.0 moles of C 2H6? A) 1.0 mol B) 2.0 mol C) 3.0 mol D) 4.0 mol 17. Given the equation: Zn + 2 HCl ZnCl2 + H2 How many moles of HCl would be required to produce a total of 2 moles of H2? A) 0.5 B) 2 C) 3 D) 4 Base your answers to questions 18 and 19 on the information below. The reaction between aluminum and an aqueous solution of copper(ii) sulfate is represented by the unbalanced equation below. Al (s) + CuSO4(aq) Al2(SO4)3(aq) + Cu(s) 18. Determine the total mass of Cu produced when 1.08 grams of Al reacts completely with 9.58 grams of CuSO 4 to produce 6.85 grams of Al 2(SO 4 ) Identify the type of chemical reaction represented by the equation. 20. Given the equation: 2 C4H O2 8 CO H2O How many moles of carbon dioxide are produced for each mole of butane consumed? A) 1 B) 2 C) 8 D) 4

5 21. Which equation shows conservation of mass and charge? A) H2SO 4 + LiOH Li2SO 4 + H2O B) 2Mg + Fe 3+ Mg Fe C) Cu + 2Ag + Cu Ag D) NH 4Br NH 3+ Br2 22. Base your answer to the following question on Given the unbalanced equation: Al + CuSO4 Al2(SO4)3 + Cu When the equation is balanced using the smallest whole-number coefficients, what is the coefficient of Al? A) 1 B) 2 C) 3 D) Which equation is correctly balanced? A) Ca + C1 2 Ca 2Cl B) Ca + Cl2 CaCl C) 2 H 2 + O2 2 H 2O D) H2 + O2 H2O 24. When the equation Al2(SO4)3 + ZnCl2 AlCl3 + ZnSO4 is correctly balanced using the smallest whole number coefficients, the sum of the coefficients is A) 9 B) 8 C) 5 D) When the equation SiO2 + C SiC + CO is correctly balanced using whole-number coefficients, the sum of all the coefficients is A) 9 B) 6 C) 8 D) Given the unbalanced equation: Ca(OH)2 + (NH4)2SO4 CaSO4 + NH3 + H2O What is the sum of the coefficients when the equation is completely balanced using the smallest whole number coefficients? A) 9 B) 11 C) 7 D) 5

6 27. Given the unbalanced equation: C3H8(g) + O2(g) H2O(g) + CO2(g) When the equation is completely balanced using smallest whole numbers, the coefficient of O2 is A) 5 B) 2 C) 3 D) Base your answer to the following question on the information below. A 1.0-gram strip of zinc is reacted with hydrochloric acid in a test tube. The unbalanced equation below represents the reaction. ZnCl2(aq) Zn(s) + HCl(aq) H2(g) + Balance the equation for the reaction of zinc and hydrochloric acid, using the smallest whole-number coefficients. Base your answers to questions 29 and 30 on the information below. In an experiment, 2.54 grams of copper completely reacts with sulfur, producing 3.18 grams of copper(i) sulfide. 29. Write the chemical formula of the compound produced. 30. Determine the total mass of sulfur consumed.

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