Chemistry, 26.06.2020 17:01 muravyevaarina
When separating a mixture by normal phase chromatography (column or thin-layer), why is better to change from less polar solvent to a more polar solvent rather than the opposite
Answers: 3
Chemistry, 22.06.2019 03:30
What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )
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Chemistry, 22.06.2019 04:50
Acompound contains c, h, and o atoms. when 1.130 g of the compound is burned in oxygen, 1.064 g co2 and 0.3631 g h2o are produced. what is the empirical formula of this compound?
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Chemistry, 22.06.2019 15:00
Describe what happens to the molecules as water goes from ice to liquid to vapor. be sure to explain what happens to the temperature during the phase changes.
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Chemistry, 22.06.2019 17:10
)benzene and toluene form nearly ideal solutions. consider an equimolar solution of benzene and toluene. at 20 Β°c the vapour pressures of pure benzene and toluene are 9.9 kpa and 2.9 kpa, respectively. the solution is boiled by reducing the external pressure below the vapour pressure. calculate (i) the pressure when boiling begins, (ii) the composition of each component in the vapour, and (iii) the vapour pressure when only a few drops of liquid remain. assume that the rate of vaporization is low enough for the temperature to remain constant at 20 Β°c.
Answers: 1
When separating a mixture by normal phase chromatography (column or thin-layer), why is better to ch...
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