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1) Determine the limiting reactant (LR) and the mass (in g) of nitrogen that can be formed from 50.0 g N2O4 and 45.0 g N2H4. Some possibly useful molar masses are as follows:N2O4 = 92.02 g/mol, N2H4 = 32.05 g/mol _N2O4(l) + _N2H4(l) → _N2(g) + _H2O(g) a) LR = N2H4, 59.0 g N2 formed b) LR = N2O4, 45.7 g N2 formed c) No LR, 45.0 g N2 formed d) LR = N2O4, 105 g N2 formed e) LR = N2H4, 13.3 g N2 formed 2) Which of the following elements is most likely to be diamagnetic? a) OXYGEN b) IRON c) COBALT d) NEON 3) Which of the following molecules has sp3 hybridization for the central atom? a) CO2 b) NH3 c) BF3 d) H20 4) Give the electron geometry (eg), molecular geometry (mg), and hybridization for AlBr3. a) eg=trigonal planar, mg=trigonal planar, sp2 b) eg = tetrahedral, mg = tetrahedral, sp3 c) eg = octahedral, mg = square planar, sp3d2 d) eg = trigonal pyramidal, mg = trigonal pyramidal, sp3 5) A molecule containing a central atom with sp hybridization has a(n) ________ electron geometry. a) octahedral b) trigonal pyramidal c) square planar d) linear 6) List the number of sigma bonds and pi bonds in a double bond. a) 1,1 b) 0,2 c) 1,2 d) 2,1 7) Give the electron geometry (eg), molecular geometry (mg), and hybridization for XeF4. a) eg=tetrahedral, mg= bent, sp3d b) eg=trigonal planar, mg= linear, sp2 c) eg=octahedral, mg=square planar, sp3d2 d) eg= trigonal bipyramid, mg=seesaw, sp3d2

cortney chem 1A

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