- 1a A 3 255 Gram Sample Of Cocl X H O Was Heated Carefully After Heating 1 776 Grams Of The Anhydrous Salt Cocl Re 1 (61.86 KiB) Viewed 54 times
1A. A 3.255 gram sample of CoCl₂ x H₂O was heated carefully. After heating, 1.776 grams of the anhydrous salt, CoCl₂, remained. 1) How many molecules of water were lost from the 3.255 g sample? II) If the original sample is CoCl₂ 6 H₂O, what is the proper name of this compound? III-a) Using noble gas/shorthand electron configuration, give the proper electron configuration for the Co ion as it is present in CoCl₂ 6 H₂O. Ill-b) in your electron configuration, circle the valence electrons. 18. A photon of electromagnetic radiation has a wavelength of 120.0 nm. I) In which region of the EMR spectrum would this radiation be found? II) What is the frequency of this radiation? III) Which of the following bonds could be broken by 1 mol of these photons, if any? (may be 1, or more than 1, or none of the choices listed) a) C=C (615 kJ/mol) b) H-CI (430 kj/mol) c) F-F (155 kj/mol) d) None of the choices Ans 1C. In each of the following sets, select the species that best fits the description given: 1) Which would have the largest radius? Cs, F, K, or Cl Ans, ii) the largest/highest first ionization energy? Na, Mg, Al, or Si Ans. iii) the most negative electron affinity? K, Br, Cs, Cl Ans. iv) the largest ionic radius? Al3, Br¹, Te 2, Ca 2 Ans. v) the greatest number of unpaired electrons? Cl, N, Cr, Ca Ans. I 1D. In a mixture of 2 gases, the partial pressure of Ar (g) was 1.12 atm and the partial pressure of N₂ (g) was 0.650 atm. What is the mole fraction (X) of N₂ (g) in the mixture?