Which isotope consists of the least total number of subatomic particles? A.    B.    C.    D.        

The plot below shows best-fit lines for the average kinetic energy of electrons ejected from the surface of two metal samples as a function of the frequency of the incident light.  The slope values of these best-fit lines provide an estimate of:   A. Planck’s constant, h B. The work function, W, of the metal C. The Wavelength of the ejected electron D. The speed of light, c     

Which reaction will most likely have appreciable concentrations of all species present in the equilibrium mixture? A.                                      

Which processes have a positive entropy change? I.   Mg (s)  +  Cl2 (g)  

What mass of Fe will be produced from the reaction of 20.0 g Fe2O3 with excess CO?                                 Fe2O3 (s)  +  3 CO (g)  

Which charge distribution is not accurate? A.    B.    C.    D.   

Which pure substance will have hydrogen bonding as one of its intermolecular forces? A.     B.     C.   D. All compounds are able to form Hydrogen bonds

What is the molecular shape of Boron Trifluoride, BF3, and the hybridization of its central atom respectively? A. Trigonal bipyramidal, sp3d B. Trigonal pyramidal, sp3 C. Tetrahedral, sp3 D. Trigonal planar, sp2     

What is the molecular geometry around the indicated nitrogen atom?      A. Trigonal pyramidal B. Tetrahedral C. Linear D. Bent

What mass of NO is produced when 0.500 moles of NH3 reacts with 0.500 moles of O2?                                                   4 NH3  + 5 O2  →  4 NO  +  6 H2O Molar Masses:NO: 30.01 g/molNH3: 17.04 g/molO2: 32.00 g/mol   A. 15.01 g NO B. 12.00 g NO C. 60.02 g NO D. 3.00 g NO