Xylene is a derivative of benzene. One isomer is 1,4-dimethylbenzene. H3C CH3 (a) State the number of 1H NMR signals for this isomer of xylene and the ratio in which they appear.

6. what does the symbol ah stand for? o one calorie given off by a reaction the specific heat of a substance the heat capacity of a substance the heat of reaction for a chemical reaction

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5

How are evaporation and sublimation similar? a both involve the formation of a gas. b both release energy to the surroundings. c both take place throughout a solid. d both take place at the surface of a liquid.