CHEM 1201 Chapter : 2 5 17 Exam 1 Review
Document Summary
Session times: sundays 6:00 p. m. 7:30 p. m. in 141- c middleton library. Thursdays 6:00 p. m. 7:30 p. m. in 141-c middleton library. Office hours: wednesdays 1:30 p. m. 3:30 p. m. in allen 39 (basement) Make sure you have a large scantron for your exam! You can pick some up for free in the student government office inside the student union. #1 calculate the percentage by mass of oxygen in sulfurous acid to 4 significant figures. #2 the acceleration of a car is 13. 4 km/s2. #3 an unknown object has a density of 15,000. 0 kg/m3. #5 a hypothetical element q has 3 naturally occurring isotopes. The mass (in amu) and % abundance are given in the table below. Calculate the mass of the q 45 isotope if the average mass is 46. 38 amu. #6 determine the molecular formula of a compound with a molar mass of 74. 08 g/mol that contains 48. 64% carbon, 8. 16% hydrogen, and 43. 19% oxygen.
