Chem101 Practice Problems

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Arizona State University *

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101

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Chemistry

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Jun 9, 2024

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Chapter 1 - Mostly Units Stuff Question 1: Convert 1.21 km to mm. Question 2: Convert 2.1 * 10 4 mL to L. Question 3 Convert 0.55 m 3 to L (1 cm 3 = 1mL, 1 m 3 = (1000 cm) 3 , not 1000 cm 3 ) Question 4 Convert 1.21 kg to g. Chapter 2 - Atoms, Ions, and the Periodic Table Question 7 : What changes between isotopes of an element? a. Electrons b. Protons c. Neutrons d. None of the above Question 8: What changes between ions of an element? a. Electrons b. Protons c. Neutrons d. None of the above Question 9: A sample of 0.1 mol of dichloromethane (CH 2 Cl 2 ) has a relative abundance of 58% 35 Cl and 42% 37 Cl. What is the average atomic mass of Chlorine in the sample? Question 10: In the universe overall, the average atomic mass of Chlorine is 35.446 AMUs. Relatively speaking, which of the following is true of the Chlorine in Question 3 compared to the universe as a whole? a. It has more 35 Cl and less 37 Cl b. It has more 37 Cl and less 35 Cl c. It has more of both 35 Cl and 37 Cl d. It has less of both 35 Cl and 37 Cl
e. None of the above Chapter 3 - Chemical Compounds For questions about naming ionic compounds, see the practice worksheet I sent out on Friday. Question 11: Name P 4 O 10 . a. Phosphoric Oxide b. Phosphous Oxide c. Tetraphosphorous Decaoxide d. None of the above Question 12: Name FeO. a. Iron Oxide b. Iron (II) Oxide c. Iron (II) Monoxide d. Iron (I) Oxide Question 13: Name NI 3 . a. Nitrogen Triiodide b. Nitrogen Iodide c. Nitrogen (III) Iodide d. None of the above Question 14: Name H 2 O (The chemical name - I know it’s water). a. Hydrogen oxide b. Dihydrogen oxide c. Dihydrogen monoxide d. Hydrogen (II) Oxide e. None of the above Question 15: Name FeP. a. Monoiron Monophosphide b. Iron (I) Phosphate c. Iron (I) Phosphide d. Iron (III) Phosphate e. Iron (III) Phosphide
f. None of the above Question 16: What is the formula of Copper (II) Oxide? a. CoO b. CoO 2 c. CuO d. CuO 2 e. Cu 2 O Question 17: Name Be 3 N 2 . a. Beryllium Nitrate b. Beryllium Nitride c. Beryllium (III) Nitride d. Beryllium (II) Nitrate e. None of the above Question 18: What is the formula for Copper (I) Sulfate? a. CuS b. CuSO 4 c. Cu 2 SO 4 d. CuS 2 Chapter 4 - Chemical Composition Question 19: A mole is most closely analogous to: a. A kilogram b. A dozen c. A liter d. A mouse Question 20: How many molecules are in 1.4 * 10 -5 mols of CO 2 ? Question 21: How many mols are in a 345.2 g sample of SiO 2 ? Question 22: How many mols are in a 71 g sample of FeO?
Question 23: How many mols of Copper ions are in a 1.34 kg sample of Copper (II) Phosphate? Question 24: How many mols ions are in 0.043 kg of sodium chloride? Chapter 5 - Chemical Reactions and Equations Question 25: What kind of reaction is 3H 2 (g) + 2N 2 (g) -> 2NH 3 (l)? a. Combination b. Decomposition c. Single-replacement d. Double-replacement Question 26: What kind of reaction is BaCl 2 (aq) + Na 2 SO 4 (aq)→BaSO 4 (s) + 2NaCl (aq)? a. Combination b. Decomposition c. Single replacement d. Double-replacement Question 27: What kind of reaction is 2H 2 O 2 (l) -> O 2 (g)+ 2H 2 O (l)? a. Combination b. Decomposition c. Single replacement d. Double-replacement Question 28: What kind of reaction is 2AgNO 3 (aq) + Cu (s) -> Cu(NO 3 ) 2 (aq) + 2Ag(s)? a. Combination b. Decomposition c. Single replacement d. Double-replacement Question 29: What kind of reaction is HCl(aq) + Li(s) -> LiCl 2 (aq) + H 2 (g)? a. Combination b. Decomposition
c. Single replacement d. Double-replacement Question 30: a. Combination b. Decomposition c. Single replacement d. Double-replacement Question 31: Which of the following reactions will take place? Assume all reagents are aqueous unless otherwise specified. a. Sodium Chloride and Hydrochloric Acid b. Potassium Nitrate and Sulfuric Acid c. Silver Nitrate and Carbonic Acid d. Iron metal and Barium oxide e. All of the above f. a, b, and c g. a and d h. a, c, and d i. None of the above Question 32: Which of the following reactions will form a precipitate? a. Reaction of Sodium Hydroxide with Sulfuric Acid b. Reaction of Sodium Hydroxide with Iron (II) Sulfate c. Reaction of Nitric Acid with Beryllium metal d. All of the above e. None of the above Chapter 6 (Part 1) - Quantities in Chemical Reactions There will be more questions involving quantities in chemical reactions in later sections and in the Putting It All Together section. Question 33: Balance the following reaction: H 2 O (l) + AlCl 3 (s)-> Al(OH) 3 (s) + HCl (aq) Question 34: Balance the following reaction: AgNO 3 (aq) + H 2 SO 4 (aq) -> Ag 2 SO 4 (aq) + HNO 3
Question 35: In the reaction of Hydrobromic Acid and Iron metal to form Iron (II) Bromide, what is the Mole Ratio between Hydrobromic Acid and Iron (II) Bromide? Question 36: a. The reaction of Isopropyl Alcohol (C 3 H 7 OH) and Oxygen gas produces water and CO 2 . Write the balanced equation for the reaction. b. I react 22.1 grams of Isopropyl Alcohol (C 3 H 7 OH) with 2.00 mols of Oxygen gas. What is the limiting reagent? c. In this reaction, H 2 O is released as a gas. I condensed the H 2 O produced by the reaction into liquid form. How many milliliters of H 2 O should I expect to get? (remember: the density of water is 1 g / mL) d. If, after the reaction in Question 36 and the condensation in Question 37, I got XXX mL of H 2 O, what was the percent yield of the reaction? Question 37: a. Ammonia (NH 3 ) reacts with Hydrochloric Acid to form Ammonium Chloride (NH 4 Cl). How many grams of Ammonia do I need to fully react with 1.0 mols of Hydrochloric Acid? b. How many grams of Ammonium Chloride do I produce? Question 38: How many grams of Sodium hydroxide would I need to neutralize (fully react with) 10.0 grams of Phosphoric Acid? Chapter 6 (Part 2) - Energy and Energy Changes Question 39: A reaction that produces heat is: a. Exothermic b. Endothermic c. Homeopathic d. Depends on the situation e. None of the above
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