Answer 6-13 please

6) (a) How would you prepare a 50.0 mL portion of 2.50 M sodium hydroxide solution? (b) The stock room has 12.0 M HCl acid. How would you make a 150.0 mL portion diluted 2.00 M solution from the stock solution? 7) A 2.50 gm sample of liquid ether is placed in a 1.50-L flask and vaporized by heating to 75C at 1.20 atm. Calculate the molar mass (gm/mole) of ether. 8) The local radio broadcasts at a wavelength of 2.75 m. What is the frequency of the corresponding EM wave? What is the energy per photon (J/photon) of this EM wave? 9) Using Hund's rule and the Aufbau Principle to write the electron configuration and the orbital box diagram for sodium atom and the Ca ion. 10) Draw the Lewis dot diagram and predict the molecular geometry of the following species using the VSEPR model: a) CF4 b) NH3 c) H20 d) PCls e) nitrite ion. 11)a) Write and balance the molecular and the net ionic equation (no precipate): CuSO3(aq) + NaCl(aq) - ? + ? b) Complete and balance the following acid-base reaction: HNO3(aq) + Ca(OH)2(aq) - ? + ? 12) The vapor pressure of water at 20C is 25 mmHg and 525 mmHg at 90C. Calculate the heat of vaporization in kJ/mole. 13) A 40.0 gm piece of metal absorbs 1.50 kJ of heat when heated from 75C to 25C. Calculate the specific h of the metal (proper units)