CHEM 101 Midterm: Chemistry 101 Exam 2 Study Guide
Document Summary
Question 1: which element is diatomic: nitrogen, barium, phosphorus, xenon. Question 2: which one of the following polyatomic ions carries a -2 charge: sulfite, chlorite, nitrite, ammonium. Question 3: which of these compounds is molecular: nai, sri2, nacn, p4o10. Question 4: which of these compounds is ionic: co2, nacl, i2f7, h2o2. Question 5: which atom does not accommodate an octet (has incomplete octet): b, as, o, c. Question 7: fill in the chart with the missing information for the following compounds. Note: the first row is completed as an example. Question 8: determine the oxidation number for each element: crn, so2- Question 11: a solution is 34. 6% nacl by mass. How many grams of nacl are in 5000. 0 cm3 of this solution if the solution density is 1. 22 g/cm3. Question 13: a 127. 0 g sample of eighteen-karat gold contains 75. 0 g of gold.
