Which of the following electron configurations is/are correct? 1.  Mo: [Kr]5s14d5 2.  Cr:[Ar]4s23d4 3.  Fe:[Ar]4s23d6

Calculate the frequency associated with orange light (610 nm)? 

Calculate the energy of a photon emitted by a hydrogen atom when the electron falls from the n=12 energy level to the n=5 energy level.

Calculate the frequency associated with violet light (405 nm)? 

Which of the following when mixed with sodium sulfate (Na2SO4) will produce a precipitant?  Pb(NO3)2 Zn(ClO3)2 CaCl2

For the following reaction 8.52 g of lithium is reacted with 7.67 g of nitrogen gas.  What is the theoretical yield of lithium nitride?  6 Li(s) + N2(g) 

Calculate the frequency associated with yellow light (575 nm)? 

Which statement is/are correct regarding an aqueous mixture of AgNO3 and HCl? i.  The net ionic equation would be:  Ag+ + Cl- ––> AgCl (s) ii.  Silver would be a spectator ion iii.  H+ would be a spectator ion

What is the energy in joules of 4 moles of photons with a wavelength of 4.12 mm? 

What is the molarity of acetate ions, C2H3O2–, if 2.15 g of calcium acetate, Ca(C2H3O2)2, is in a 250.0 mL solution?