Chemistry, 25.10.2019 19:43 niceguy1997
You are performing a simple distillation of roughly 50: 50 liquid solution containing two components, hexane and nonane you place 15 ml of the mixture in a round bottom flask, and then collect the distillate sequentially as four three ml samples labeled s1, s2, s3, and s4. pure hexane has a refractive index of 1.375 and pure nonane has a refractive index of 1.407. you measure a refractive index of 1.3948 for one of the four samples. assuming the refractive index varies linearly with mole fraction, estimate the mole fraction of hexane in this sample.
Answers: 1
Chemistry, 22.06.2019 08:30
The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.
Answers: 1
Chemistry, 22.06.2019 15:00
Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.
Answers: 2
Chemistry, 22.06.2019 20:40
What effect would average population growth have on land usage? a. urban use of land would rise to more than 30 percent of available land. b. industrial use of land would rise to more than 30 percent of available land. c. the percentage of available land used as cropland would stay the same. d. cropland would fall to about 10 percent of available land.
Answers: 1
You are performing a simple distillation of roughly 50: 50 liquid solution containing two components...
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