What is the energy of a photon with a wavelength of 594 nm? 

Based on the successive ionization energies of an unknown element in the table provided, how many valence electrons does the element have?  Successive Ionization energies Number of Electrons Removed Ionization Energies (kJ/mol)  1 600 2 1200 3 3000 4 12,000 5 13,000 6 14,500 7 15,600

Complete the following statements about the Lewis structure of KrF3-. The central atom is [CA]. There are [1] single bonds. There are [2] double bonds.  There are [3] lone pairs around the central atom. 

Which of the following molecules is non-polar? 

What is the volume of ammonia (NH3) produced when 0.214 g of nitrogen gas reacts with excess hydrogen gas at STP? 

At constant temperature a 139 mL sample of gas has a pressure of 1.10 atm. What is the volume if the pressure is increased to 3.19 atm? 

What is the pH of a solution with a 0.0067 M concentration of H3O+?

What is the coefficient of carbon dioxide gas when the following equation is balanced correctly to the lowest whole number ratio? 

What is the energy of a photon with a wavelength of 452 nm? 

Complete the following statements about the Lewis structure of XeCl3-. The central atom is [CA]. There are [1] single bonds. There are [2] double bonds.  There are [3] lone pairs around the central atom.