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ISU CHEM 167 - Practice Exam

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1. Which of the following is a physical property? A. corrosion of aluminum metal B. melting of ice C. burning a match D. an acid and base reacting2. Which of the following solutions is the most acidic? A. 0.5 M NH3 B. 0.3 M HNO3 C. 0.4 M HI D. 0.7 M CH3OH3. How many grams are in 1.45 L of a substance if the density is 0.564 g/mL?4. You are given a bottle that contains 4.59 cm3 of a metallic solid. The total mass of the bottle and solid is 35.66 g. The empty bottle weighs 14.23 g. What is the density of the solid?5. ____________ are made up of many smaller parts called monomers. The element ___ forms the backbone of nearly all of these.6. What is the correct atomic symbol for potassium-40? A. 19K B. 19K C. 40K D. 40K7. Complete the following table.8. The element Mg has three naturally occurring isotopes. Theisotopic masses (amu) and % abundances are listed in the table below. Find the average atomic mass.9. Which of the following ions (denoted by their charge) have the strongest attraction? A. +1, +2, r=2 B. -2, +3, r=3 C. -1, -1, r=1 D. -2, +2, r=1Symbol56Fe3+Protons 76Neutrons 116 118Electrons 76Net charge2+ 3+Isotope AbundanceAtomicmass(amu)24Mg 78.99 % 23.9850425Mg 10.00 % 24.9858426Mg 11.01 % 25.9825910. CompoundNameCompoundFormulaionic ormolecular?LiNO3PF5silicontetrachloridemercury (II)bromidealuminumhydroxide11. Write the correct molecular formula for this compound.12. Which of the following is not a type of chemical bond? A. molecular B. ionic C. metallic D. covalent13. Which of the following is a halogen? A. bromine B. sodium C. potassium D. oxygen14. Complete and balance the following reaction. C3H6(g) + O2(g) 15. How many atoms of N are present in 3.1 mg N2O? 16. How many grams of solute are present in 37.2 mL of 0.471M HBr?17. What ion would you have to add to increase the acidity (decrease the pH) of a solution?18. Complete the following equation, then write the completeand net ionic equations. Are there any spectators? Is there aprecipitant? Ba(NO3)2 + Na2SO4 19. How many grams of aluminum sulfate are produced when2.64 g of aluminum hydroxide is reacted with excess sulfuricacid? 2Al(OH)3(s) + 3H2SO4(aq) Al2(SO4)3(aq) + 6H2O(l)20. A compound consists of 75.69% C, 8.80% H, and 15.51% Oby mass. Determine the empirical formula as well as the molecular formula if the molar mass is determined to be 412


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ISU CHEM 167 - Practice Exam

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