Moles Exam PDF

1. Which graph represents the relationship between 4. What is the amount of heat that must be absorbed pressure and volume for an ideal gas at constant to increase the temperature of a 130.-gram temperature? sample of water from 20.0...

1. Which graph represents the relationship between 4. What is the amount of heat that must be absorbed pressure and volume for an ideal gas at constant to increase the temperature of a 130.-gram temperature? sample of water from 20.0°C to 50.0°C? A) A) 1.63 × 104 J B) 3.90 × 10 3 J C) 2.94 × 10 5 J D) 4.34 × 10 4 J 5. What information about C 4H10 can be determined from its structural formula, but not determined from its molecular formula? A) ratio of different atoms B) molar mass B) C) arrangement of the atoms D) physical state 6. Compared to the number of electron shells and radius of an aluminum atom in the ground state, a boron atom in the ground state has A) fewer electron shells and a smaller radius B) more electron shells and a smaller radius C) more electron shells and a larger radius C) D) fewer electron shells and a larger radius 7. At STP, which property of tungsten remains the same for all samples of tungsten? A) surface area B) density C) thermal energy D) mass 8. Which sample of zinc has atoms with the highest average kinetic energy? D) A) 15 g of Zn at 20.°C B) 5.0 g of Zn at 40.°C C) 20. g of Zn at 10.°C D) 10. g of Zn at 30.°C 9. Which molecule is symmetrical in both shape and distribution of charge? A) HCl B) CH4 C) NH 3 D) H2O 2. A student calculates the density of a sample of Fe 10. Which numerical setup can be used to calculate to be 7.57 grams per cubic centimeter. Based on the formula mass of C 9H11NO 2? Table S, what is the percent error for the student's calculated density of Fe? A) 9 u + 11 u + 1 u + 2 u B) 12 u + 1 u + 14 u + 16 u A) –0.038% B) –4.0% C) 9(6 u) + 11(1 u) + 1(7 u) + 2(8 u) C) –3.8% D) –0.040% 3. Which formula represents a molecule with the D) 9(12 u) + 11(1 u) + 1(14 u) + 2(16 u) most polar bond? A) HCl B) HBr C) F2 D) H2 Last, First Name: Version 2 Period: 11. Given the equation representing a reaction: 14. Solid aluminum has a specific heat capacity of 0.90 J/g K. How many joules of heat are 3Mg(s) + N2(g) Mg3N2(s) absorbed to raise the temperature of 24.0 grams of aluminum from 300. K to 350. K? What is the mass of Mg3N2 that is produced A) 1100 J B) 45 J when 14.58 grams of magnesium completely C) 22 J D) 1200 J reacts with 5.60 grams of nitrogen? 15. An element that is a very reactive metal could A) 10.46 g B) 8.98 g have an atomic number of C) 49.34 g D) 20.18 g A) 19 B) 9 C) 2 D) 79 12. Given the incomplete equation for a 16. What is the vapor pressure of propanone at fermentation reaction: 45°C? X 2CH3CH2OH + 2CO2 A) 70. kPa B) 60. kPa C) 21 kPa D) 79 kPa Which formula represents the missing reactant, 17. One mole of bromine gas, Br2, has a mass of X, in this equation? A) 70.0 g B) 35.0 g A) C5H12O5 B) C5H6O5 C) 79.9 g D) 159.8 g C) C6H6O6 D) C6H 12O 6 18. Which statement explains the low boiling point 13. The graph below shows a compound being of hydrogen, H 2, at standard pressure? cooled, beginning in the liquid phase. A) Hydrogen has weak covalent bonds. B) Hydrogen has strong covalent bonds. C) Hydrogen has weak intermolecular forces. D) Hydrogen has strong intermolecular forces. 19. Given the equation representing a reaction: F2(g) + 2KCl(aq) 2KF(aq) + Cl2(g) Which type of chemical reaction is represented by the equation? A) single replacement B) decomposition C) double replacement Which statement describes the average kinetic D) synthesis energy and the potential energy between minute 20. Which formula is the empirical formula for 2 and minute 6? ethane, C 2H6? A) Average kinetic energy and potential A) CH3 B) CH energy both remain constant. C) C4H12 D) C2H6 B) Average kinetic energy and potential 21. What is the amount of heat required to melt 43 energy both decrease grams of solid magnesium oxide at its melting C) Average kinetic energy remains constant point? The heat of fusion is 1.9 x 10 3 J/g. and potential energy increases. A) 2.3 x 10 -2 J B) 8.2 x 104 J D) Average kinetic energy remains constant C) 4.4 x 10 1 J D) 3.4 x 10 5 J and potential energy decreases. Last, First Name: Version 2 Period: 22. Given the balanced equation representing a reaction: C2H5OH( ) + 3O2(g) 2CO2(g) + 3H2O( ) + energy The mole ratio of oxygen molecules to carbon dioxide molecules is A) 3:2 B) 1:2 C) 3:3 D) 1:3 23. Given the equation representing a reaction: 2H2(g) + 2NO(g) N2(g) + 2H2O(g) What is the mass of N2(g) produced when 1.0 gram of H2(g) completely reacts with 15.0 grams of NO(g) to produce 9.0 grams of H2 O(g)? A) 25.0 g B) 28.0 g C) 14.0 g D) 7.0 g 24. What is the number of moles in a 78.8-gram sample of MgCO 3 (gram-formula mass = 84.3 g/mol)? A) 0.935 mol B) 0.949 mol C) 1.070 mol D) 0.843 mol 25. Given information about the naturally occurring isotopes of bromine: Which numerical setup can be used to determine the atomic mass of bromine? A) (78.92 u)(50.69) + (80.92 u)(49.31) B) (80.92 u)(50.69) + (78.92 u)(49.31) C) (80.92 u)(0.5069) + (78.92 u)(0.4931) D) (78.92 u)(0.5069) + (80.92 u)(0.4931) Last, First Name: Version 2 Period: Chemistry[Moles Exam[3/19/2025]]- Eduware Classification Total Questions: 25 5.PHYSICAL BEHAVIOR OF MATTER (9) 5.C.Properties of Gases (1) 5.C.i.Ideal Gas Model (KMT) (1) 5.C.i.a.Ideal Gas Theory (1) 5.B.Energy, Temperature & Entropy (3) 5.B.i.Heat (Thermal Energy) (1) 5.B.ii.Temperature (1) 5.B.ii.a.Average Kinetic Energy (1) 5.B.iii.Energy of Phase Changes (1) 5.D.Phase Changes (3) 5.D.i.Heating / Cooling Curves (1) 5.D.iii.Specific Heat (Joules) (1) 5.D.iv.Melting, Heat of Fusion / Solid (1) 5.E.Intermolecular Forces (2) 5.E.ii.Vapor Pressure and Evaporation (1) 5.E.i.Hydrogen Bonding (1) 11.LABS AND MEASUREMENTS (1) 11.A.Labs and Measurements (1) 11.A.ii.Measurement and Equipment (1) 11.A.ii.c.Percent Error (1) 3.STOICHIOMETRY (11) 3.A.Empirical, Molecular, and Structural Formulas (3) 3.A.ii.Molecular Formula (1) 3.A.iii.Structural Formula (1) 3.A.i.Empirical Formula (1) 3.B.Gram Formula Mass (2) 3.B.i.Gram Formula Mass (2) 3.B.i.a.Determining Gram Formula Mass (1) 3.B.i.b.Moles of Atoms in a Formula (1) 3.E.Math and Chemical Equations (5) 3.E.iii.Determine Missing Reactant or Product (2) 3.E.v. Mass / Mole / Numbers Combinations (1) 3.E.v.a. Mass - Moles Problems (1) 3.E.i.Conservation (1) 3.E.ii.Balancing Equations (1) 3.D.Types of Chemical Reactions (1) 3.D.i.Types of Chemical Reactions (1) 2.PERIODIC TABLE (4) 2.D.Trends within Groups and Periods (1) 2.D.i.Atomic Radius (1) 2.B.Properties of Elements (2) 2.B.viii.Density (1) 2.B.ii.Metals (1) 2.A.Periodic Law / Navigating the Table (1) 2.A.i.Periodic Law / Navigating the Table (1) 1.ATOMIC STRUCTURE (2) Chemistry[Moles Exam[3/19/2025]]- Eduware Classification Total Questions: 25 1.F.Wave-Mechanical Model (electron cloud) (1) 1.F.iii.Electron Configurations of Elements (1) 1.D.Isotopes (1) 1.D.iii.Determining Average Atomic Mass (1) 4.CHEMICAL BONDING (2) 4.C.Bond and Molecular Polarity (2) 4.C.i.Bond Polarity (1) 4.C.ii.Molecular Polarity (1) Exam Question Summary Moles Exam 3/19/2025 # QID# Ans Thinking Skills Standards 1 12270 C Ideal Gas Theory 2 12463 C Percent Error 3 12468 A Bond Polarity 4 12469 A Heat (Thermal Energy) 5 12320 C Molecular Formula; Structural Formula 6 11894 A Atomic Radius; Electron Configurations of Elements 7 12329 B Density 8 12449 B Average Kinetic Energy 9 12241 B Molecular Polarity 10 12348 D Determining Gram Formula Mass 11 12178 D Determine Missing Reactant or Product 12 12475 D Determine Missing Reactant or Product 13 12354 D Heating / Cooling Curves 14 11842 A Specific Heat (Joules) 15 12146 A Metals; Periodic Law / Navigating the Table 16 12013 A Vapor Pressure and Evaporation 17 12009 D Mass - Moles Problems 18 12074 C Hydrogen Bonding 19 12095 A Types of Chemical Reactions 20 12346 A Empirical Formula 21 11840 B Energy of Phase Changes; Melting, Heat of Fusion / Solid 22 12480 A Balancing Equations 23 11923 D Conservation 24 12094 A Moles of Atoms in a Formula 25 11921 D Determining Average Atomic Mass Last, First Name: Version 2 Period:  Answer Key Moles Exam 1. C 2. C 3. A 4. A 5. C 6. A 7. B 8. B 9. B 10. D 11. D 12. D 13. D 14. A 15. A 16. A 17. D 18. C 19. A 20. A 21. B 22. A 23. D 24. A 25. D Last, First Name: Version 2 Period: