Temperature, °C 100 80 60 40 20 0 -20 -40 Volume, liters 2.98 2.87 2.68 2.53 2.33 2.21 2.07 1.88 Using graphing software, set up your graph with volume ranging from 0 to 3 liters on the vertical axis, and temperature ranging from -350 to +100°C on the horizontal axis. Plot the experimental data given above and draw the best straight line. Extend the line to the point where the volume is zero. This is the experimental value for absolute zero in degrees Celsius. Remember to label your axes and to give your graph a title. Attach your graph to this question sheet. Experimental value for absolute zero = °C

2. Estimate the absolute deviation and the coefficient of variation for the results of the following calculations. Round each result so that it contains only significant digits. The numbers in parentheses are absolute standard deviations. 2 (1.203 (+0.004) x 103 + 18.25 (10.005) x 102 – 34.012(±0.001)) 3.9201 (+0.0006) x 10-3 y =

8.0 cm 5.8 cm 3.9 cm 1.5 cm A B C D Figure 2. Developed TLC plate of commercial analgesic and standards Use the data presented in Figure 2 as basis for your answer. The TLC plate used is 5 cm by 10 cm. Note that dot A is for the commercial analgesic, dot B is for the aspirin standard, dot C is for the acetaminophen standard, and dot D is for the caffeine standard. What component/s islare present in the commercial analgesic as confirmed on the developed chromatograph?

esc Part A Using the relationship between mass and volume in density, determine which conversion factor is needed to solve for the missing value where X indicates a numerical value equivalent to the density in the units given. Drag the appropriate labels to their respective targets. ► View Avallable Hint(s) X kg 1L 1 mL Xg 1L X kg Xg 1 mL F1 2 30 F2 Given Value # 3 5.0 g 55 mL 15 L 7.0 kg 20 F3 S4 $ 9. F4 Need mL of sample g of sample kg of sample L of sample % 5 F5 Conversion Factor 6 #tv MacBook Air F6 & ✓ lº AG A F7 Reset (a) F8 Help W F9 F10 ! (<) F11 112