Chemistry, 07.08.2021 02:40 jesusmojica25
Which of the following units is most commonly used to measure concentration in chemistry?
a) Grams of solute per milliliter of solvent
b) Moles of solvent per milliliter of solution
c) Moles of solute per liter of solution
d) Grams of solvent per liter of solution
Answers: 3
Chemistry, 21.06.2019 20:10
Which statement is true about the part of the electromagnetic spectrum that human eyes can detect? it contains only the colors of the rainbow and television waves. o it is divided into seven ranges of wavelengths. it contains ultraviolet, visible, and infrared light. it is divided into nine ranges of wavelengths.
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Chemistry, 22.06.2019 05:40
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
Answers: 2
Chemistry, 22.06.2019 18:00
Heat is the total potential energy of a substance that can be transferred. true false
Answers: 1
Chemistry, 22.06.2019 19:40
What type of electromagnetic waves does the human eye see as the colors red blue or green a visible light waves b radio waves c infrared waves d microwaves
Answers: 1
Which of the following units is most commonly used to measure concentration in chemistry?
a) Grams...
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