Have an account?
Skip to Content
Build your own quiz
Suggestions for you
48 questions
Show Answers
See Preview
- 1. Open EndedLithium oxide can be produced by the reaction shown below. If a manufacturing company wants to make 25.0 g of Li2O, what mass of Li is necessary? [Molar masses: Li, 6.94 g/mol; O, 16.00 g/mol] 4Li(s) + O2(g) → 2Li2O(s)
- 2. Open EndedDinitrogen monoxide, or laughing gas (N2O), is used as a dental anesthetic and as an aerosol propellant. How many molecules of N2O are present in a 12.6 g sample of the compound?
- 3. Open EndedConsider the two beakers labeled A and B. Beaker A contains 1 mole of iron atoms, and Beaker B contains 1 mole of lead atoms. Which statement concerning these samples is known with certainty?
- 4. Open EndedDiamond is a pure form of the element carbon. If a 2 carat diamond has a mass of 0.396 g, how many carbon atoms are contained in this diamond?
- 5. Open EndedTo convert a given number of moles into the number of atoms, one would multiply by which of the following factors?
- 6. Open EndedHow is the reaction shown below best classified? 2HgO(s) → 2Hg(l) + O2(g)
- 7. Open EndedChoose the best classification of the reaction represented by the following equation: 2KClO3(s) → 2KCl(s) + 3O2(g)
- 8. Open EndedThe chemical equation below is not balanced. Balance the equation, then determine which statement concerning the balanced equation is TRUE. KClO3(s) → KCl(s) + O2(g)
- 9. Open EndedWhat is the mass of 3.5 × 1022 molecules of CO2?
- 10. Open EndedWhat is the mass of 4.00 moles of helium, the gas commonly used to fill party balloons and lighter-than-air ships?
- 11. Open EndedAluminum metal and oxygen gas are produced when aluminum oxide is heated at high temperature. Which statement concerning this chemical change is true?
- 12. Open EndedChoose the best classification of the reaction represented by the following equation: 2Fe3+(aq) + Fe(s) → 3Fe2+(aq)
- 13. Open EndedMagnesium hydroxide, Mg(OH)2, as "Milk of Magnesia" can be used to neutralize excess stomach acid, represented by HCl(aq) according to the chemical equation below. Mg(OH)2(s) + 2HCl(aq) → MgCl2(aq) + 2H2O(l) When 5.00 g of HCl are combined with an excess of Mg(OH)2, what mass of MgCl2 can be produced? [Molar masses: H, 1.01 g/mol; O, 16.00 g/mol; Mg, 24.31 g/mol; Cl, 35.45 g/mol]
- 14. Open EndedWhen the equation below is balanced with the lowest possible whole number coefficients, what is the sum of the coefficients? Ca(s) + HCl(g) → CaCl2(s) + H2(g)
- 15. Open EndedWhich statement correctly describes what is happening in the reaction shown below? 2Mg(s) + S2(g) → MgS(s)
- 16. Open EndedMethanol (CH3OH) is the fuel used by racecars in the Indianapolis 500. It burns in the engine according to the equation below. How many moles of oxygen gas are necessary to react completely with 12.5 L of methanol? [Density: CH3OH, 0.7910g/mL; Molar mass: CH3OH, 32.05 g/mol] 2CH3OH(l) + 3O2(g) → 2CO2(g) + 4H2O(g)
- 17. Open EndedCis-platin is a chlorine-containing chemotherapy agent with the formula Pt(NH3)2Cl2. What is the mass of one mole of cis-platin?
- 18. Open EndedWhich of the following statements concerning gases is FALSE?
- 19. Open EndedWho discovered the gas law where volume (L) and Temperature (K) are directly proportional?
- 20. Open EndedA barometer measures
- 21. Open EndedA helium-filled weather balloon is launched from the ground where the pressure is 752 mmHg and the temperature is 21°C. Under these conditions its volume is 75.0 L. When it has climbed to an altitude where the pressure is 89 mmHg and the temperature is 0°C, what is its volume?
- 22. Open EndedWhich of the following is(are) NOT a type of crystalline solid?
- 23. Open EndedWhich of the following is a statement of Dalton's law of partial pressure?
- 24. Open EndedWhat is the volume occupied by one mole of helium at 0°C and 1 atm pressure?
- 25. Open EndedA gas with pressure of 5.0 atm is compressed at constant temperature from 10.0 L to 2.0 L. What is the pressure of the gas after it is compressed?
- 26. Open EndedA sample of oxygen occupies 1.00 L. If the temperature remains constant, and the pressure on the oxygen is decreased to one third the original pressure, what is the new volume?
- 27. Open EndedWho formulated the relationship between the volume and the pressure of a gas?
- 28. Open EndedA balloon at 25oC has 1.00 L of air. The balloon is heated to 40oC at constant pressure. What is the new volume?
- 29. Open EndedWhat law predicts the expansion of a balloon when helium is added?
- 30. Open EndedTo which elements must hydrogen be bonded in order to display hydrogen bonding?
- 31. Open EndedWhich statement concerning the three states of matter is FALSE?
- 32. Open EndedSarin is a nerve gas that was previously used as a chemical weapon. Considering the physical properties of sarin shown in the table, which statement about sarin is FALSE? Melting point −56°C Boiling point 158°C
- 33. Open EndedCalculate the concentration (% m/V) of NaCl solution that was made by dissolving 15.0 g of sodium chloride in enough water to make 300.0 mL of solution.
- 34. Open EndedWhich of the following properly describes a colligative property of a solution?
- 35. Open EndedOne mole of sodium chloride is added to 100 mL of water in beaker A. One mole of glucose, C6H12O6, is added to 100 mL of water in beaker B. How much more will the freezing point of water be lowered in beaker A than in beaker B?
- 36. Open EndedWhat term is used to describe a solution of lower osmolarity compared to one with a higher osmolarity?
- 37. Open EndedEnough water is added to 50.0 mL of a 0.660 M NaOH solution in order to bring the total volume to 450.0 mL. What is the molarity of this diluted solution?
- 38. Open EndedIncreasing the pressure of a gas over a solution increases the solubility of the gas in the solution. This is an example corresponding to which law?
- 39. Open EndedWhich statement is FALSE?
- 40. Open EndedWhat is the law that states that vapor pressure of the solvent decreases in proportion to the concentration of the solute?
- 41. Open EndedWhat is the molarity of a solution that contains 4.50 mol of NaF dissolved in 750.0 mL of solution?
- 42. Open EndedHow many grams of KCl are present in 250.0 mL of a 0.125 M solution? [Molar mass: KCl, 74.55 g/mol]
- 43. Open EndedThe label on a jar of jam says it contains 13 g of sucrose per tablespoon (15 mL). What is the molarity of sucrose in the jam? [Molar mass: sucrose, 342.3 g/mol]
- 44. Open EndedIf 5.20 g of HCl is added to enough distilled water to form 3.00 L of solution, what is the molarity of the solution? [Molecular weight: HCl, 36.46 amu]
- 45. Open EndedWhat is the molarity of a solution prepared by diluting 10.0 mL of 18.0 M HCl with enough water to make 500.0 mL of solution?
- 46. Open EndedA solution contains 1.65 g of NaF in a total volume of 150.0 mL. What is its concentration expressed as % (m/V)?
- 47. Open EndedVitamin D is essential for the normal development of teeth and bones. A tablet of Vitamin D is tested for its solubility in water and benzene. The results are shown in the table below. What is the most appropriate interpretation of the solubility results? water benzene (C6H6) insoluble soluble
- 48. Open EndedAssuming that air is a solution containing four molecules of N2 for every one molecule O2, what is the concentration of O2 in this solution, expressed as % (m/m)? [Formula weights: N2, 28.02 amu; O2, 32.00 amu]
- Answer choicesTagsAnswer choicesTags