Calculate Mn & Mw, and the polydispersity index (PI) for the molecular weight data provided below and graph. Repeat your calculations if the molecular weight data were changed by increasing the frequency (# of chains) of the following molecular weights by 500: 600, 700, 800, 900, 1000, and 1100 and graph.

Explain what happens to the PI and what this means in terms of molecular weight distribution. Input data and graph in Excel or similar graphing program and dropbox your Excel file (both graphs along with the Mw, Mn, and PI for each each data set). Don't forget to put your name in the Excel filename.

Mi (g/mol) Ni                        Mi (g/mol) Ni

50  1000                                900        6000

100 1200                            1000         5000

200 1500                            1100        4000

300 1900                             1200        3200

400 2500                            1300      2500

500 3200                            1400      2000

600 4000                             1500    1700

700 5000                             1600    1400

800 6500                             1700    1200