1. which statements best describes the labelled D in the TGA graph?

a. D has a total mass decomposition of 3.10 grams of the polymer

b. D are the carbon residuals that will undergo combustion at temperatures greater than 700 degrees celsius

c. D are residuals of volatile gases such as oxygen, carboxylates, and nitrates.

2. which is the mass change of the volatile components?

a. no volatiles are present

b. 0.076 grams

c. 1.789 grams

3. what is the percentage mass of the volatiles that is present in the material?

a. 11.38%

b. no volatiles are present

c. 1.69%

A 4.5 grams polymer material was subjected to thermogravimetric analysis. The following data were obtained as shown in the TGA graph: TG 1% 100 Mass Change: - 11.28 % A 90 Mass Change: -18.06% 80 B 70 60 Mass Change.-29.22 % 50 D Residiyal Mass: 39.75% (9955 C) 40 100 200 300 600 700 800 900 400 500 Temperature