DISCUSSION QUESTIONS AND PROBLEMS A variety of physical methods, includi compoun
ID: 1088350 • Letter: D
Question
DISCUSSION QUESTIONS AND PROBLEMS A variety of physical methods, includi compounds, suggest that the carbon atom in a hydrocarbon chain has a diameter of about 1.5 × 10-8 cm. How do your calculated values compare with this, in view of your assessment of the accuracy expected for this experiment? 1. ing X-ray diffraction of crystalline organic Use the value of 1.5×10 hydrocarbon chain in Figure 2. Use this value to calculate Avogadro's number from your data. Physical methods indicate that the effective cross-sectional area of a hydro- carbon chain is about 2.1 × 10-15 cm2. How does the value you determined compare with this, in view of your assessment of the accuracy expected for this experiment? Use this value to calculate Avogadro's number from your data. 2. cm to calculate the cross-sectional area (a)2 of the 3. Use your data to calculate the uncertainty in (a) your value of Avogadro's number and (b) the diameter of the carbon atom. Report both the % uncer- tainty as well as the absolute uncertainty in the quantity calculated (that is, Avogadro's number and the size of the C atom). Identify the largest single source of experimental uncertainty and report its contribution to the total experimental uncertainty in 96. 4. 5.Explanation / Answer
1)
The accuracy of the experiment was affected by the size of the dropper, therefore making the drops smaller/larger. In our case, our droplets were smaller than average. The hydrocarbon chain is smaller than the value of 1.5X10 -8 cm
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