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I1. What is the hybridization of the central atom in a molecule with a tetrahedral molecular goometry? a) p b) sp d) sp e) none 12. Which of the following statements are postulates of the kinetic-molecular theon 1. Gas particles are in constant, random motion 2. The distance between gas particles is large in compari 3. The average kinetie energy of gas pertir a)I only b) 2 only

I1. What is the hybridization of the central atom in a molecule with a tetrahedral molecular goometry? a) p b) sp d) sp e) none 12. Which of the following statements are postulates of the kinetic-molecular theon 1. Gas particles are in constant, random motion 2. The distance between gas particles is large in compari 3. The average kinetie energy of gas pertir a)I only b) 2 only

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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
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11. What is the hybridization of the central atom in a molecule with a tetrahedral molecular geometry? a) sp b) sp ) sp d) sp e) none 12. Which of the following statements are postulates of the kinetic-molecular theory of gases? 1. Gas particles are in constant, radom motion 2. The distance between gas particles is large in comparison to their size. 3. The average kinetie energy of gas particles is proportional to the kelvin temperature. a) I only b) 2 only c) 3 only d) i and 2 only e) 1,2, and 3 13, A molecular orbital that increases the electron density between two nuclei is said to be e) hybridized a) antibonding b) bonding d) pi-bonding e) nonpolar 14. What is the bond order for a molecule with 4 electrons in bonding molecular orbitals and 2 electrons in antibonding molecular orbitals? e) 2 a) 0 b) 0.5 c) I d) 1.5 15. Which of the following elements is capable of forming hypervalent compounds in which octet is exceeded? a) C b) N b) O d) P e) F 16.Sodium azide decomposes rapidly to produce nitrogen gas. 2 NaN3(s) 2 Na(s) + 3N:(g) What mass of sodium azide will inflate a 60.0 L airbag for a car to a pressure of 1.50 atm at 320 °C? (R= 0.08206VL.atm/mol.K). a) 80.1 g b) 67.2 g c) 156 g d) 234 g e) 351 g 17.How many atoms of neon occupy a volume of 14.3 L at STP? (Imole = 22.4 L; 1 mole - 6.02 x 10" atoms) a) 7.68 x 10" atoms e) 9.45 x 10 atoms b) 1.29 x 10 atoms c) 2.21 x 10 atoms d) 3.84 x 10 atoms 18. An unknown gaseous hydrocarbon contains 85.63% C. Its density is 1.524 g/L at 0.665 atm and 373 K. What is the molecular formula of the gas? (R = 0.08206 L-atm/mol-K) at STP? a) C: He b) C; Hs c) C Hs d) Cs H1o e) Co H12 19.A tightly sealed flask contains 884 mmHg of N2 at 94.0 °C. The flask is cooled until the pressure is reduced to 442 mmHg. a) -47.0 °C What is the temperature of the gas? b) 47.0 °C c) -89.5 °C d) 184 °C e) 188 °C 20. What is the volume occupied by a mixture of 0.848 mol of N2 and 0.848 mol of O2 gases at 1.17 atm and 42.5°C a) 37.6 L b) 44.0 L c) 51.5 L d) 25.7 L e) 1.70 L Spring 2022 G. Duker-Eshun
Transcribed Image Text:11. What is the hybridization of the central atom in a molecule with a tetrahedral molecular geometry? a) sp b) sp ) sp d) sp e) none 12. Which of the following statements are postulates of the kinetic-molecular theory of gases? 1. Gas particles are in constant, radom motion 2. The distance between gas particles is large in comparison to their size. 3. The average kinetie energy of gas particles is proportional to the kelvin temperature. a) I only b) 2 only c) 3 only d) i and 2 only e) 1,2, and 3 13, A molecular orbital that increases the electron density between two nuclei is said to be e) hybridized a) antibonding b) bonding d) pi-bonding e) nonpolar 14. What is the bond order for a molecule with 4 electrons in bonding molecular orbitals and 2 electrons in antibonding molecular orbitals? e) 2 a) 0 b) 0.5 c) I d) 1.5 15. Which of the following elements is capable of forming hypervalent compounds in which octet is exceeded? a) C b) N b) O d) P e) F 16.Sodium azide decomposes rapidly to produce nitrogen gas. 2 NaN3(s) 2 Na(s) + 3N:(g) What mass of sodium azide will inflate a 60.0 L airbag for a car to a pressure of 1.50 atm at 320 °C? (R= 0.08206VL.atm/mol.K). a) 80.1 g b) 67.2 g c) 156 g d) 234 g e) 351 g 17.How many atoms of neon occupy a volume of 14.3 L at STP? (Imole = 22.4 L; 1 mole - 6.02 x 10" atoms) a) 7.68 x 10" atoms e) 9.45 x 10 atoms b) 1.29 x 10 atoms c) 2.21 x 10 atoms d) 3.84 x 10 atoms 18. An unknown gaseous hydrocarbon contains 85.63% C. Its density is 1.524 g/L at 0.665 atm and 373 K. What is the molecular formula of the gas? (R = 0.08206 L-atm/mol-K) at STP? a) C: He b) C; Hs c) C Hs d) Cs H1o e) Co H12 19.A tightly sealed flask contains 884 mmHg of N2 at 94.0 °C. The flask is cooled until the pressure is reduced to 442 mmHg. a) -47.0 °C What is the temperature of the gas? b) 47.0 °C c) -89.5 °C d) 184 °C e) 188 °C 20. What is the volume occupied by a mixture of 0.848 mol of N2 and 0.848 mol of O2 gases at 1.17 atm and 42.5°C a) 37.6 L b) 44.0 L c) 51.5 L d) 25.7 L e) 1.70 L Spring 2022 G. Duker-Eshun
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