IL the most polar? a) N-O b)o-F ) B-O d) s-o e) all are equally polar 7. At what temperature (in °C) will 25.0 g of earbon dioxide (at 1.00 atm) occupy 21.5 L? 8oc b) 461°C c) -263°C d)-270°C e) 113°C How many times more rapidly will hydrogen (H2) gas effuse through a pinhole than wi Deuterium is an isotope of hydrogen with a molecular mass of 4.0 g/mole. ll leuterium (D) sa? (A) V2 (B)2 (C)22 (D)4 9. Which of the followi ing arrangements from lowest to highest in first ionization energies is correct ? 10. In which of the following compounds obeys the octet rule? a) XeFs b) BF, c) CIO d) so2 e) none of the preceding choicees I I. The bright spectral lines observed in the emission spectrum of a flame or gas discharge tube are due to a) the absorption of light at specific wavelengths b) the formation of an excited state of atoms c) the transition of an atom from an excited state to a lower energy state d) the change from anti-parallel to parallel electron spins in an atom 12 A one-liter container is filled with one mole of hydrogen a 25 °C. A second one-liter container is filled with one mole f oxygen at 25 °C. Comparing the pressure of the hydrogen to the exygen, the ratio molH AlD (CLF) = 255 kJ/mol 13. From Bond Dissociation Enthalpies: ÎHD (CI-CI) = 243 kJ/mol; ì¨ã(F-F )-159 kJ/mol; F2 (g)-CIF(g) /calculate the enthalpy, aH, for the chemical reaction: (d) +912 kJ Ch (g) (c) +171 kJ (a) -147 kJ (b)-108 kJ
