Worth 30 pts.
liquid vinegar and solid baking soda chemically react to form solid sodium acetate, liquid water, and carbon dioxide gas.
if 30 g of vinegar were combined with 40 g of baking soda in an unsealed plastic quart bag, why would the mass of the products in the unsealed plastic quart bag total approximately 49 grams?
a. approximately 30 g of the products remained as vinegar
b. approximately 21 g of carbon dioxide escaped into the air
c. approximately 49 g of sodium acetate was created in the reaction
d. approximately 21 g of the reactants were destroyed in the reaction

Compare and contrast physical changes with chemical changes.

Salicylic acid is a very important acid. it is used to synthesize the aspirin by treating with acetic anhydride. a 0.2015-g sample of salicylic acid was dissolved in a 100.00-ml volumetric flask, and the solution was diluted to the mark. a 10-ml aliquot of this solution was titrated with standard naoh (0.01130 + 0.2% n) to a phenolphthalein faint pink color end point at 19.81 ml. (a) (calculate the normality of the salicylic acid solution used in the titration. (b) assuming the salicylic acid is pure, what is the equivalent weight of the salicylic acid? practice problems for the final exam (continued) (c) (calculate the inherent error in the determination of the equivalent weight you calculated in part (b). use the following absolute errors in the equipment /glassware when calculating the inherent error. 5.00-ml pipet: + 0.02 ml 100-ml volumetric flask: + 0.08 ml analytical balance: + 0.2 mg 25-ml buret: + 0.03 ml

Which statement best describes the function of enzymes?