Recent questions tagged molar-mass

The Henry's law constant for the solubility of $N_2$ gas in water is $1.0\times 10^5$ atm.The mole fraction of $N_2$ in air is 0.8.The amount of $N_2$ from air dissolved in 10mol of water at 298K and 5 atm pressure is

asked Jul 23, 2014 by sreemathi.v

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Twenty grams of hemoglobin in 1L solution at 300K is separated from pure water by a semipermeable.At equilibrium,the height of solution (density $1gcm^{-3}$) in a tube dipped in solution is found to be 83.1mm higher than in the tube dipped in water.If $g=10ms^{-2}$ ,the molar mass of hemoglobin is about

asked Jul 23, 2014 by sreemathi.v

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A solution containing $8.6gL^{-1}$ of urea (molar mass $60gmol^{-1}$) is isotonic with a 5% solution of unknown solute.The molar mass of the solute will be

asked Jul 23, 2014 by sreemathi.v

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The molar mass of sodium chloride determined by osmotic pressure would be

asked Jul 23, 2014 by sreemathi.v

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The freezing point of a solution containing 36g of a compound (empirical formula : $CH_2O$) in 1.20 kg of water is found to be $-0.93^{\large\circ}C$.The molecular formula of the solute is

asked Jul 23, 2014 by sreemathi.v

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A solution contains 10g of a solute and 116g of acetone at $30^{\large\circ}$C.Its vapour pressure is 290 Torr.If the vapour pressure of pure acetone is 300 Torr at $30^{\large\circ}$C,the molar mass of solute is

asked Jul 22, 2014 by sreemathi.v

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The vapour pressure of a pure liquid A is 10.0 Torr at $27^{\large\circ}C$,One gram of B is dissolved in 20g of A,the vapour pressure is lowered to 90 Torr.If the molar mass of A is $200gmol^{-1}$,the molar mass of B is

asked Jul 22, 2014 by sreemathi.v

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The vapour pressure of a solution of 5g of a nonelectrolyte in 100g water at a particular temperature is 2950 Pa and that of pure water at the same temperature is 3000 Pa.The molar mass of the solute is

asked Jul 22, 2014 by sreemathi.v

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The vapour pressure of a solution having 2.0g of a solute X(molar mass $32gmol^{-1}$) in 100g of $CS_2$ (vapour pressure 854 Torr) is 848.9 Torr.The molecular formula of the solute is

asked Jul 22, 2014 by sreemathi.v

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The molar mass of benzoic acid in benzene as determined by depression in freezing point method corresponds to

asked Jul 22, 2014 by sreemathi.v

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The molecular weight of benzoic acid in benzene as determined by depression in freezing point method corresponds to

asked Jul 18, 2014 by sreemathi.v

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Which of the following colligative properties can provide molar mass of proteins (or polymers or colloids) with greater precision?

asked Jul 18, 2014 by sreemathi.v

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For a dilute solution containing a nonvolatile solute,the molar mass of solute evaluated from the osmotic pressure measurement is given as

asked Jul 17, 2014 by sreemathi.v

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For a dilute solution containing a nonvolatile solute,the molar mass of solute evaluated from the elevation of boiling point is given by the expression

asked Jul 17, 2014 by sreemathi.v

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For a dilute solution containing a nonvolatile solute,which of the following expressions correctly represents the molar mass of solute ?

asked Jul 17, 2014 by sreemathi.v

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The element “M” forms the chloride $\text{MCl}_4$. If the chloride contains 75 % chlorine by mass, calculate the molar mass of element “M”.

asked Mar 15, 2014 by balaji.thirumalai

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The Van't Hoff factor of $Na_2SO_3$ is

asked Feb 17, 2014 by sreemathi.v

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