Two scientists are investigating the properties of water. In one experiment, they notice that water breaks down to hydrogen and oxygen gas during a chemical reaction. Which of the following does this experiment demonstrate A. it demonstrates that a water molecule consists of two hydrogen atoms and one oxygen atom.

B. it demonstrates that water consists of atoms

C. it demonstrates that water is a compound

D. it demonstrates that water is an element

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

The chemical formula for emerald is be3al2(sio3)6.an emerald can be decided as

How many more valence electrons does sodium need to have a full outer valence shell