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6. Consider the reaction: CH,OH(/) + 30:(g) If the reaction mixture expands under constant pressure and does work on the surroundings equal to 5.0 kJ, then AU (internal energy change) for the reaction (in kJ/mol) is: 3H,0) + 200,(g), AH=-1236 kJ. - 1231 b) -1237 c) -1251 d) -1241 e) -1246 7. When 0.0500 mol of HCI(ag) reacted with 0.0500 mol of NaOH(ag) in a coffee cup calorimeter, the temperature of the solution increases by 5.99°C. What is the enthalpy change for the following reaction (in kJ)? HCI(aq) + NAOH(aq) NaCI(ag) + H,O() Assume that the heat capacity of the calorimeter and its contents is 465.4 J/°C. 9-55.8 b) - 38.6 c) 38.6 d) -0.139 e) 55.8 um numbers areftriuclexcent

6. Consider the reaction: CH,OH(/) + 30:(g) If the reaction mixture expands under constant pressure and does work on the surroundings equal to 5.0 kJ, then AU (internal energy change) for the reaction (in kJ/mol) is: 3H,0) + 200,(g), AH=-1236 kJ. - 1231 b) -1237 c) -1251 d) -1241 e) -1246 7. When 0.0500 mol of HCI(ag) reacted with 0.0500 mol of NaOH(ag) in a coffee cup calorimeter, the temperature of the solution increases by 5.99°C. What is the enthalpy change for the following reaction (in kJ)? HCI(aq) + NAOH(aq) NaCI(ag) + H,O() Assume that the heat capacity of the calorimeter and its contents is 465.4 J/°C. 9-55.8 b) - 38.6 c) 38.6 d) -0.139 e) 55.8 um numbers areftriuclexcent

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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please solve question 6 and 7
Name (in Arabic): Form 3 Student ID: 1. The density of a liquid is 2.65 g/cm'. Calculate the mass of 0.25 m' of this liquid (in kg). a) 7.1x10? b) 9.5x10 c) 5.0x102 d) 6.6x102 e) 8.2x102 2. The correct name for P2Os is: O Phosphorous(V) oxide d) Phosphorous oxide b) Phosphorous pentoxide e) Phosphoric oxide c) Diphosphorous pentoxide. 3. The mass of one molecule of a compound is 2.03x10g. Calculate the molar mass of the compound (in g/mol), (Avogadro's Number 6.02x10"). 8) 122 b) 158 c) 192 4. Which of the following pairs of aqueous solutions would not produce a reaction when mixed? d) 146 e) 134 a) NANO, and CuCl2 d) CuCl, and Na,PO, b) Na,SO, and Ba(OH)2 e) AgNO, and HCI c) Ba(OH)2 and HCI 5. The molar mass of an unknown gas was measured by an effusion experiment. It was found that it took 60 s for a given volume of the gas to effuse, whereas the same volume of nitrogen gas required 48 s to effuse under the same conditions (rate of effusion a 1//M). The molar mass (in g/mol) of the gas is: a) 25 b) 35 c) 18 d) 31 e) 44 6. Consider the reaction: CH,OH(/) + 30:(g) 3H;0(g) + 200;(g), AH=-1236 kJ. If the reaction mixture expands under constant pressure and does work on the surroundings equal to 5.0 kJ, then AU (internal energy change) for the reaction (in kJ/mol) is: 9- 1231 b) -1237 c) -1251 d) -1241 e) -1246 7. When 0.0500 mol of HCI(ag) reacted with 0.0500 mol of NaOH(ag) in a coffee cup calorimeter, the temperature of the solution increases by 5.99°C. What is the enthalpy change for the following reaction (in kJ)? HCI(aq) + NaOH(aq) NaCI(ag) + H;O() Assume that the heat capacity of the calorimeter and its contents is 465.4 J/°C. 9-55.8 b) – 38.6 c) 38.6 d) -0.139 e) 55.8 8. All the following statements about the quantum numbers are(true exeept: a) m has 21AI possible values. c) mi may take values of +/ to -4, including zero, d) I may take integral values from 1 to n-1. O m, may take b) n may take values from I to o. only the values of +1/2 and -1/2 9. The ground state electron configuration of manganese atom (15MN) has unpaired electrons and is c) 2, paramagnatic d) 3, paramagnatic a) 5, paramagnatic O5, diamagnetic b) 0, diamagnetic 10. Which of the following elements has the largest second ionization energy? a) Si CI c) Na d) S e) Mg -1 -
Transcribed Image Text:Name (in Arabic): Form 3 Student ID: 1. The density of a liquid is 2.65 g/cm'. Calculate the mass of 0.25 m' of this liquid (in kg). a) 7.1x10? b) 9.5x10 c) 5.0x102 d) 6.6x102 e) 8.2x102 2. The correct name for P2Os is: O Phosphorous(V) oxide d) Phosphorous oxide b) Phosphorous pentoxide e) Phosphoric oxide c) Diphosphorous pentoxide. 3. The mass of one molecule of a compound is 2.03x10g. Calculate the molar mass of the compound (in g/mol), (Avogadro's Number 6.02x10"). 8) 122 b) 158 c) 192 4. Which of the following pairs of aqueous solutions would not produce a reaction when mixed? d) 146 e) 134 a) NANO, and CuCl2 d) CuCl, and Na,PO, b) Na,SO, and Ba(OH)2 e) AgNO, and HCI c) Ba(OH)2 and HCI 5. The molar mass of an unknown gas was measured by an effusion experiment. It was found that it took 60 s for a given volume of the gas to effuse, whereas the same volume of nitrogen gas required 48 s to effuse under the same conditions (rate of effusion a 1//M). The molar mass (in g/mol) of the gas is: a) 25 b) 35 c) 18 d) 31 e) 44 6. Consider the reaction: CH,OH(/) + 30:(g) 3H;0(g) + 200;(g), AH=-1236 kJ. If the reaction mixture expands under constant pressure and does work on the surroundings equal to 5.0 kJ, then AU (internal energy change) for the reaction (in kJ/mol) is: 9- 1231 b) -1237 c) -1251 d) -1241 e) -1246 7. When 0.0500 mol of HCI(ag) reacted with 0.0500 mol of NaOH(ag) in a coffee cup calorimeter, the temperature of the solution increases by 5.99°C. What is the enthalpy change for the following reaction (in kJ)? HCI(aq) + NaOH(aq) NaCI(ag) + H;O() Assume that the heat capacity of the calorimeter and its contents is 465.4 J/°C. 9-55.8 b) – 38.6 c) 38.6 d) -0.139 e) 55.8 8. All the following statements about the quantum numbers are(true exeept: a) m has 21AI possible values. c) mi may take values of +/ to -4, including zero, d) I may take integral values from 1 to n-1. O m, may take b) n may take values from I to o. only the values of +1/2 and -1/2 9. The ground state electron configuration of manganese atom (15MN) has unpaired electrons and is c) 2, paramagnatic d) 3, paramagnatic a) 5, paramagnatic O5, diamagnetic b) 0, diamagnetic 10. Which of the following elements has the largest second ionization energy? a) Si CI c) Na d) S e) Mg -1 -
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