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). 7.1x10 b) 9.5x10 c) 5.0x10 d) 6.6x102 e) 8.2x102 2. The correct name for POs 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"). a) 122 b) 158 c) 192 d) 146 e) 134 4. Which of the following pairs of aqueous solutions would not produce a reaction when mixed? a) NaNO, and CuCl2 d) CuCl, and Na,PO4 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/VM, The molar mass (in g/mol) of gas is: a) 25 b) 35 c) 18 d) 31 e) 44 6. Consider the reaction: C;H,OH() + 30,(g) - 3H;O(g) + 2C0;(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. b) - 38.6 c) 38.6 d) -0.139 e) 55.8 9-55.8 8. All the following statements about the quantum numbers are(true excent: a) m has 21A1 possible values. c) mi may take values of +/ to -1, including zero, d) I may take integral values from 1 to n- 1. m, may take only the values of +1/2 and -1/2 b) n may take values from to o. unpaired electrons and is 9. The ground state electron configuration of manganese atom (35MN) has c) 2, paramagnatic d) 3, paramagnatic b) 0, diamagnetic a) 5, paramagnatic O 5, diamagnetic 10. Which of the following elements has the largest second ionization energy? a) Si d) S e) Mg 6) CI c) Na -1-