CHE 1 Practice Final PDF

CHE 1 Final F24 1 CHE 1 Final Name: ___________________________________________ First Last Please write legibly Student ID: __________________________________________...

CHE 1 Final F24 1 CHE 1 Final Name: ___________________________________________ First Last Please write legibly Student ID: _____________________________________________ Sec0on: A____ TA: ____________________________________ 1. This exam has 28 ques0ons. Each ques0on worths 1 point. 2. This is a close book exam. Notes, papers, and electronic devices are forbidden. 3. Do not turn the pages before instructed. Do not con0nue wri0ng aDer required to stop. 4. Please answer clearly in the designated area. Answers outside the area may not be graded. 5. For mul0ple choice ques0ons, use a pencil to fully darken the bubble. To change your answer, erase the mark completely. Please bubble only one answer for each problem. Ques0ons not bubbled correctly may not be credited. CHE 1 Final F24 2 1. Determine the correct answer to the following opera0on with correct significant figures: 16 + 33.35 5.2 A. 9.4 B. 9.5 C. 9.49 D. 9.42 2. Which of the following is not correct regarding periodic table and periodicity? A. Nonmetals are found only in Groups 1 and 2 of the periodic table. B. Elements in the same group have similar chemical proper0es. C. Noble gases in Group 18 are mostly inert under standard condi0ons. D. Transi0on metals are located in the center of the periodic table (Groups 3-12). 3. Which of the following is not correct regarding electrolytes? A. Strong electrolytes completely dissociate into ions in water. B. Weak electrolytes par0ally dissociate into ions in water. C. A higher concentra0on of non-electrolytes increases conduc0vity. D. Electrolyte strength depends on the extent of ioniza0on or dissocia0on in water. 4. A plane is descending at a rate of 2200 feet per minute. How many meters does the plane descend in a second? A. 1.2 B. 3.1 C. 11 D. 72 5. According to the trends in the periodic table, predict the charge of the stable ion(s) of manganese: A. Mn! B. Mn"! C. Mn#! D. There are mul0ple possible stable ions. CHE 1 Final F24 3 6. Name the following compound: Fe" O# A. Iron (II) oxide B. Iron (III) oxide C. Diiron oxide D. Diiron trioxide 7. Name the following compound: PCl$ A. Phosphorus chloride B. Phosphorus (V) chlrode C. Phosphorus pentachloride D. Monophosphorus (V) chloride 8. Calculate the moles of oxygen atom in 1.00 × 10"% O" molecules A. 1.03 × 10" B. 1.66 × 10# C. 3.32 × 10# D. 6.64 × 10# 9. A compound contains 82.66% C and 17.34% H by mass. Which of the following is the empirical formula of the compound? A. C" H" B. C" H# C. C" H& D. C" H$ 10. Balance the equa0on for following photosynthesis reac0on. What is the correct coefficient for C (𝑠)? Fe# O& (𝑠) + C (𝑠) → Fe (𝑠) + CO" (𝑔) A. 1 B. 2 C. 4 D. 8 CHE 1 Final F24 4 11. In the unbalanced reac0on below: H" (𝑔) + O" (𝑔) → H" O (𝑔) What is the mass of water generated when 15.0 g O" is consumed? A. 8.45 g B. 16.9 g C. 133 g D. 267 g 12. In an acid-base reac0on, 15.0 g sulfuric acid is mixed with 20.0 g potassium hydroxide. In this reac0on, A. Sulfuric acid is the limi0ng reactant. B. Potassium hydroxide is the limi0ng reactant. C. There is no limi0ng reactant. D. There is not enough informa0on to determine the limi0ng reactant. 13. Sodium hydroxide solu0on can absorb carbon dioxide by the reac0on below. When 35.0 g CO" (g) is bubbled into a solu0on containing 95.0 g NaOH, how many grams of sodium carbonate will be obtained? 2 NaOH (aq) + CO" (g) → Na" CO# (aq) + H" O (l) A. 84.3 g B. 126 g C. 169 g D. 252 g 14. When performing scuba diving, it is dangerous for a diver if they ascend quickly without breathing mul0ple 0mes. When a diver is at a depth of 25 meters, the air pressure in lung is approximately 2.50 atm, and the volume of air in lung is 5.00 L. If the diver surface immediately without breathing (without changing the amount of air in lung) where the air pressure is 1.00 atm, how will the volume of air change in lung? A. It does not change. The danger is caused by other factors. B. It shrinks to 2.00 L, causing compression to muscles and 0ssues around. C. It expands to 10.0 L, causing rupture to lung 0ssues and muscles. D. It expands to 12.5 L, causing rupture to lung 0ssues and muscles. CHE 1 Final F24 5 15. A chemistry reactor with a constant volume of 1.0 L is sealed with an internal pressure of 350.0 psi at 27.0 °C. When the reactor is heated to 120 °C, what will the pressure become? A. 78.8 psi B. 267 psi C. 458 psi D. 1560 psi 16. A chemistry reactor with a constant volume of 3.35 L is sealed. The reactor is filled with 6.00 mol oxygen gas at 27.0 °C. What is the pressure of this reactor? A. 3.97 atm B. 44.1 atm C. 4470 atm D. 33500 atm 17. Hydrazine (N" H& ) is used as a rocket propellent in certain cases. The combus0on reac0on is: N" H& (l) + O" (l) → N" (g) + 2 H" O (g) A small test rocket is filled with 32.00 kg hydrazine and 36.00 kg oxygen. The combus0on of the propellent releases massive amount of heat, with a temperature of 2500 °C and a pressure of 40.0 atm for the gas produced. ADer the complete combus0on of the propellent, what is the total volume of nitrogen produced under this condi0on? A. 5.68 × 10# L B. 5.77 × 10# L C. 3.89 × 10' L D. 4.86 × 10' L 18. A pa0ent is prescribed for 150 mg of a drug to be administered by IV injec0on. The drug manufacturer advised the drug to be delivered at a concentra0on of 0.50 g/L. What volume of IV pack should be used for the drug? A. 0.030 L B. 0.30 L C. 0.33 L D. 3.3 L CHE 1 Final F24 6 19. Which of the following combina0on of ions in a solu0on will result in a reac0on? A. Ag ! , NO( ! # , K , Cl ( B. NH&! , Br ( , Li! , NO( # C. Ba"! , OH( , Na! , Cl( D. K ! , PO"( ! "( # , Cs , CO# 20. A food processing facility was being inves0gated for the inappropriate emission of phosphoric acid to the drainage system. A government agency collected 100.0 mL of water sample from the facility and determined that it only contains phosphoric acid. The scien0sts decided to determine the phosphoric acid concentra0on by 0tra0ng it with 0.1538 M NaOH solu0on. 17.8 mL of such NaOH solu0on was needed to 0trate phosphoric acid. What is the concentra0on of phosphoric acid in the water sample? A. 0.00913 mol/L B. 0.0274 mol/L C. 0.0822 mol/L D. 2.59 mol/L CHE 1 Final F24 7 21. Which is the correct expression of the equilibrium constant for the reac0on below? CaO (s) + CO" (g) ⇌ CaCO# (s) A. 𝐾)* = [CO" ] + B. 𝐾)* = [-. !] [-0.][-.! ] C. 𝐾)* = [-0-." ] [-0-. ] " D. 𝐾)* = [-0.][-. !] 22. Under 75 °C, the equilibrium constant for the following reac0on is measured to be 𝐾)* = 107 2 CO (g) + O" (g) ⇌ 2 CO" (g) Which of the following statement is incorrect regarding the system? A. The equilibrium constant has a constant value under any temperature. + B. If the equa0on is balanced as CO (g) + " O" (g) ⇌ CO" (g), the equilibrium constant will change. C. The addi0on of a catalyst does not change the equilibrium constant. D. The addi0on of extra reactant does not change the equilibrium constant. 23. Methanol, a useful solvent for synthesis, can be synthesized by the reac0on below: CO (g) + 2 H" (g) ⇌ CH# OH (g) The reac0on is exothermic. Which of the following will result in a shiD of the equilibrium toward the product? A. Add CO B. Add CH# OH C. Increase temperature D. Expand reactor volume 24. In the reac0on below, HPO( ( ( & (aq) + H" O (l) ⇌ H" PO& (aq) + OH (aq) H" PO( & is A. The Brønsted-Lowry acid B. The Brønsted-Lowry base C. The conjugated acid of the Brønsted-Lowry base D. The conjugated base of the Brønsted-Lowry acid CHE 1 Final F24 8 25. Which of the statements below is not correct regarding acid ioniza0on constant 𝐾1 ? A. Different acids have different 𝐾1 values. B. An acid with greater 𝐾1 value is stronger. C. For polypro0c acids such as carbonic acid, 𝐾1+ ≪ 𝐾1". D. To write the expression of 𝐾1 , water should not be included. 26. A solu0on has a pH value of 4.53 at 25 °C. What is the concentra0on of hydroxide in this solu0on? A. 3.0 × 10(& 𝑀 B. 3.0 × 10($ 𝑀 C. 3.4 × 10(+2 𝑀 D. 3.4 × 10(3 𝑀 CHE 1 Final F24 9 Constants Conversions (* = exact) Formulas > 𝑒 = 1.6021765 × 10(+3 C Mass 𝑑= N 𝑚4 = 9.109383 × 10(#+ kg 1 lb = 453.59237 g > 𝑛=O 𝑚5 = 1.6749273 × 10("% kg 1 lb = 16 oz.∗ 3℉ 𝑚6 = 1.6726217 × 10("% kg 1 metric ton = 1000 kg ∗ 𝑇P = $ ℃ 𝑇T + 32 ℉ 𝑁7 = 6.022142 × 10"# mol(+ 1 amu = 1.660538 × 10("& g += 𝑇B = + ℃ 𝑇T + 273.15 K 8 𝑅 = 8.314 9:;∙= >" ∙?1 Volume = 8.314 >@A∙B 1 US gal = 3.7854 L = 4 US qt ∗ P C∙0D9 𝑃=7 = 0.08206 1 US qt = 32 US al oz ∗ 9:;∙= 𝑃𝑉 = 𝑛𝑅𝑇 C∙D:EE 1 US al oz = 29.5735 mL = 62.36 9:;∙= 𝑃+ 𝑉+ = 𝑃" 𝑉" 1 cm# = 0.001 L ∗ ?# ? 1 in# = 16.4 cm# U# = U! ! pH scale N# N! =U pH = − log+2 [H! ] Pressure U# ! [H! ] = 10(FG 1 atm = 760 torr ∗ pOH = − log+2 [OH( ] = 101325 Pa ∗ % composition of element = 90MM :V );)9)JD [OH( ] = 10(F.G = 406.783 in H" O × 100% 90MM :V W:9F:XJY pH + pOH = 14 = 14.6959 psi [H! ][OH( ] = 1 × 10(+& ;H 1 = 1 psi ∗ 0WDX0; ZI);Y % yield = D[):E)DIW0; ZI);Y × 100% IJ! 1 torr = 1 mmHg ∗ Prefixes 1 Pa = 1 kg ∙ m(+ ∙ s(" ∗ 9:;)M :V M:;XD) tera- T trillion 1012 Molarity = ;ID)EM :V M:;XDI:J 1 bar = 100,000 Pa ∗ giga- G billion 109 mega- M million 106 Percent by mass = Force kilo- k thousand 103 90MM M:;XD) 1 N = 1 kg ∙ m ∙ s(" ∗ × 100% deci- d tenth 10-1 90MM M:;XDI:J cen0- c hundredth 10-2 Energy 90MM M:;XD) milli- m thousandth 10-3 ppm = 90MM M:;XDI:J × 10' KL∙9! micro- μ millionth 10-6 1J=1 M! ∗ nano- n billionth 10-9 1 J = 0.2390 cal 𝑀= 5 N pico- p trillionth 10-12 1 J = 0.009869 L ∙ atm 𝑀+ 𝑉+ = 𝑀" 𝑉" 1 L ∙ atm = 101.3 J Conversions (* = exact) Length 1 in = 2.54 cm 1 ft = 12 inches ∗ 1 yd = 3 ft ∗ 1 m = 39.37 inches 1 mile = 5280 ft ∗ 1 mile = 1.609 km CHE 1 Final F24 10 Ions and nomenclature H# O! Hydronium HCO( # hydrogen carbonate or ClO(& perchlorate 1 mono- ! NH& ammonium bicarbonate ClO(# chlorate 2 di- OH( hydroxide CO"( # carbonate ClO(" chlorite 3 tri- C" H# O( " acetate "( SO& sulfate ClO( hypochlorite 4 tetra- CN( cyanide PO#( & phosphate MnO( & permanganate 5 penta- ( "( NO# nitrate HPO"( & hydrogen phosphate CrO& chromate 6 hexa- NO(" nitrite H" PO(& dihydrogen phosphate Cr" O"( % dichromate 7 hepta- 8 octa- 9 nona- 10 deca-