Chemistry 11:  After a short review of measuring protocol we did Unit 2 # 48. 49. amd 50.  We took notes on Significant Figures, then completed Unit 2 # 55 b-j, 56, and 57.  In the second half we did the Density Lab, which is due on Friday (a brief report with the following sections:  Title, Purpose, Materials, Procedure, Data & Observations, Calculations, Results)