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Physical Chemistry
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Questions (634)
The freezing-point depression is -0.930 Celsius degree. Determine the molality of the solution of an unknown nonelectrolyte in
3 answers
asked by
vivian
795 views
the vapor pressure of ethanol at 20c is 44 mmHg and the vapor pressure of methanol at the same temperature is 94mmHg. A mixture
4 answers
asked by
cassidy
2,217 views
At 20. °C, the vapor pressure of toluene is 22 millimeters of mercury and that of benzene is 75 millimeters of mercury. An
4 answers
asked by
Unsure
3,035 views
Which action(s) will decrease the equilibrium concentration of a non-reacting gas in water?
1. decreasing the temp. of the water
4 answers
asked by
Joe
2,419 views
The freezing point of benzene is 5.5°C. What is the freezing point of a solution of 8.50 g of naphthalene (C10H8) in 425 g of
5 answers
asked by
Swim4eva
1,819 views
The solubility of a gas is 0.54 g/L at 1.5 atm. what is its solubility at pressure of 0.80 atm and the same temperature?
4 answers
asked by
mk
410 views
The specific volume of solid ammonium sulfate is 0.565 ml/g. The solubility of ammonium sulfate at 0 oC is 706 g/1000 g water.
4 answers
asked by
AYTUE
1,009 views
At 25 degrees Celsius the vapour pressure of pure benzene is 93.9 torr. When nonvolatile solvent is dissolved in benzene, the
3 answers
asked by
jarmiah
1,734 views
The ion-product of pure water, Kw, is
2.51 * 10(-14) at the body temp of 37 degrees Celcius. What are the molar H2O and OH
5 answers
asked by
Leroy
1,183 views
At –11.0 °C (a common temperature for household freezers), what is the maximum mass of aspartame (C14H18N2O5) you can add to
3 answers
asked by
Anon
1,272 views
A mixture of toluene and water boils at 90 C, calculate the vapor pressure of toluene at this temperature. Assume the
7 answers
asked by
Help please
1,590 views
The vapor pressure of an organic solvent is 50 mm Hg at 25°C and 200 mm Hg at 45°C. The solvent is
the only species in a closed
3 answers
asked by
Anonymous
2,208 views
b. What is the freezing point depression when 153 g of bromine is added to 100 g of benzene? Kf of benzene is 5.12 C/m
3 answers
asked by
Valerian
341 views
Enthalpy questions?
Given this enthalpy change MgCl₂(s)---->Mg²⁺(g) +2Cl⁻(g) ΔH∅ =+2490KJ/mol Mg2+(g)----> Mg²⁻ (aq)
4 answers
asked by
Arvind Vijayanand Dubey
1,243 views
The normal boiling point of methanol is 64.7°C. A solution containing a nonvolatile solute dissolved in methanol has a vapor
3 answers
asked by
Anonymous
3,579 views
A solution prepared by dissolving 3.00 grams of ascorbic acid (vitamin C, C6H8O6), in
50.0 grams of acetic acid has a freezing
4 answers
asked by
Ace
891 views
which pair of substances are most likely to obey Raoult's Law?
C5H12 and C6H14 H3PO4 and H20 C4H9COOH and C5H12 C5H12 and H20
3 answers
asked by
Anonymous
1,389 views
The water in a beaker has a mass of 18g. Electricity is passed through the water for two hours. Afterward the water has a mass
3 answers
asked by
AJ
1,859 views
The vapor pressure of water at 45.0 °C is 71.93 mmHg. What is the vapor pressure of water over a solution prepared from 75.0 g
6 answers
asked by
Saad Alharbi
1,513 views
What is the density of KCl at 25.00 °C if the edge length of its fcc unit cell is 628 pm?
4 answers
asked by
Mia
2,233 views
The vapour pressure of pure water at 760 mm at 25 degree celcius. The vapour of solution containing 1m solution of glucose will
4 answers
asked by
munaf
1,061 views
Vapour pressure of ideal solutions at 25c the vapour pressure of chloroform and carbon tetrachloride are 26.54 and 15.27 kpa
3 answers
asked by
Munavvar
670 views
The vapor pressure of liquid chloroform, CHCl3, is 100. mm Hg at 283 K. A 0.198 g sample of liquid CHCl3 is placed in a closed,
3 answers
asked by
ryan
3,142 views
What is the molecular mass of a gas that diffuses through a porous membrane 1.86 times faster than Xe?
3 answers
asked by
Tyler
1,336 views
Suppose that a student calculated Kf of biphenyl to be 81.2C kg/mol. calculate the mass of an unknown if a solution containing
6 answers
asked by
Artem
1,254 views
The molal boiling-point constant for water is 0.51 degrees C/molal. The boiling point of a 1.00 molal solution of Ca(NO3)2
3 answers
asked by
Marcus
2,385 views
The normal freezing point of cyclohexane is 6.55 C. When 0.458 g of benzophenone is dissolved in 15.0 g of cyclohexane, the
3 answers
asked by
Ania
1,984 views
Determine the Molecular weight of a compound that weighs 34g, is vaporized at 50 degrees C, at 1.05 atm, in a flask with a
1 answer
asked by
Anonymous
371 views
Calculate the vapor pressure of a solution of 0.39 mol of cholesterol in 5.4 mol of toluene at 32oC. Pure toluene has a vapor
4 answers
asked by
Molly
2,055 views
The freezing point of an aqueous solution that contains a non-electrolyte is -9.0 degrees celcious.
A. What is the freezing-point
3 answers
asked by
Taylor
1,296 views
the solubility of a gas is 0.34g/L at STP. What is it's solubility at a pressure of 0.80 atm and the same temperature?
2 answers
asked by
David
962 views
The vapor pressure of CCl3F at 300 K is 856 torr. If 11.5 g of CCl3F is enclosed in a 1.0 L container, will any liquid be
4 answers
asked by
Elizabeth
1,586 views
How is colloid distinguished from a solution or a suspension?
6 answers
asked by
bobby
1,731 views
Calculate the % empty space in 1 mole of water at 25 degree C (d=0.9971g/ml). The volume of a water molecule can be taken as the
3 answers
asked by
christy
1,340 views
Which of the following statements about the dissolving process is accurate?
A) For a substance to dissolve, solute-solvent
3 answers
asked by
Rachel
1,297 views
Is cl2 or F2 less volatile?
Cl2 is less volatile because it has more intermolecular forces and therefore has a higher boiling
4 answers
asked by
Sarah
1,232 views
Calculate the freezing point of 0.5 g of biphenyl in 20.0 mL of cyclohexane. Cyclohexane Fp = 6.5 degrees C Kf 20.01
2 answers
asked by
Brit
1,006 views
The solubility of air in water is approximately 2.1x10^-3 M at 20 C and 1 atm. What is the constant for air.?
3 answers
asked by
Anonymous
1,074 views
What is the freezing point of a solution that contains 21.1g of urea, CO(NH2)2, in 305mL water, H2O? Assume a density of water
3 answers
asked by
Jenn
1,186 views
1) Calculate the partition coefficient of caffeine in water/methylene
chloride from the following data: 10.3 g/100 mL for
4 answers
asked by
Jaimie
2,148 views
what is the freezing point of 0.05 M glucose(C6H12O6), 0.05 M NaCl, and 0.05 M MgCl2?
3 answers
asked by
rakesh kumar
1,720 views
the vapor pressure of pure water at 60 c is 157 mmHg. what is the vapor pressure of this solution at the same temperature, in mm
2 answers
asked by
angel
1,277 views
Calculate the magnitude of the cohesive energy of potassium iodide (KI). The ionic radii of K+ and I−, are 152 pm and 206 pm,
1 answer
asked by
simone
420 views
If the freezing point of pure toluene is -95.15 oC and its freezing point depression constant is -8.38 oC/molal, what is the
2 answers
asked by
Jaden
1,051 views
Can someone please explain/interpret the gaseous and solid PCl5 in Raman and IR spectra.The details of spectrums are as follows:
3 answers
asked by
Anonymous
417 views
A Gouy balance is used to determine the magnetic susceptibility of a substance. A strong electromagnet is placed next to the
6 answers
asked by
Anonymous
1,592 views
Melting Point Determinations
1. Melting range of impure vanillin 2. Melting range of recrystalized vanillin 3. Melting range of
4 answers
asked by
teetee
2,164 views
The vapor pressure of the liquid HF is measured at different temperatures. The following vapor pressure data are obtained.
Temper
5 answers
asked by
Hannah
818 views
Calculate the freezing point of a solution of 3.46 g of a compound,X,in 160 g of benzene. When separate sample of X was
10 answers
asked by
Ethio
2,759 views
The vapour pressure of pure water at 110 c is 1070 torr.A soln of ethyleneglycol in water has vapour pressure of 1 atm. Assuming
4 answers
asked by
Ethio
2,437 views
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Parent Categories (3)
Chemistry
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Science/Chemistry