Chemistry Exam 2: Lewis Structures, Formulas, and Empirical Formulas, Exams of Chemistry

Download Chemistry Exam 2: Lewis Structures, Formulas, and Empirical Formulas and more Exams Chemistry in PDF only on Docsity! 1 Chem. 110 Name _______________________________ Fall 05 Practice EXAM 2 (Last) (First) Part 1 1. Draw the Lewis Dot Structure for each of the following (12 points) a. nitrate _________________________ b. chlorite _________________________ c. carbonic acid _________________________ d. carbon tetra fluoride __________________________ /12 2 2. Write the formula for each of the following (12 points) a. calcium phosphate _________________________ b. aluminum sulfate _________________________ c. copper (I) carbonate _________________________ d. ferrous hydroxide _________________________ e. nitric acid _________________________ f. zinc bicarbonate _________________________ 3. Write the Name for each of the following (12 points) a. K2S2O3 _________________________ b. H 2SO3(aq) _________________________ c. NiI3 _________________________ d. ICl3 _________________________ e. CdC2O4 _________________________ f. (NH4)2HPO4 _________________________ /24 /24pts. 5 8. (12 points) A 3.750 g sample of the compound responsible for the odor of cloves contains only C, H, and O. It is burned in a combustion chamber. The mass of CO2 produced is 10.05 g, and the mass of water produced is 2.470 g. What is the empirical formula of phenol? Answer: ________________________ 9.The percent of aluminum in the compound Al2X3 is 18.56%. What is the molar mass of the element represented by X?? (10 points) Answer: ________________________ /22pts. 6 10. Assume all atoms are neutral unless specified Element (Name-Mass#) Element nuclear symbol Number of Neutrons Electron configuration Number of electrons in 3rd shell Lewis dot structure Number of valence electrons Calcium-42 18 7 11. Write the nuclear symbol for the an Iron atom that has 86 subatomic particles (3 points) _________________________ Which of the following has the largest atomic radius: Na or Cl ? __________ F or I ? __________ Which of the following has the highest ionization energy? Mg or S ? __________ N or As ? ___________ Which of the following has the highest electronegativity? Al or Cl ? _________ F or I ? __________ Draw the Lewis dot structure for Se __________ Si ___________ Draw the electron configuration notation for Ge ________________________________________ Dras the orbital notation for bromine Is the following compound ionic or covalent AlBr3 _________________ BrCl2 _________________ /26 points