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A solution containing 29.95 mg of an unknown protein per 29.0 ml solution was found to have an osmotic pressure of 3.30 torr at 32 degrees C. What is the molar mass of the protein?
An unknown gas effuses through a porous barrier at a rate that is 0.752 times the rate of Ar (g) under the same conditions
The molar enthalpy of vaporization of water is 44.012 kJ mol-1. Under an applied pressure of 1 atm, water boils at 373.15 K. The safety value of a kitchen pressure cooker is set to release when the pressure reaches 2 atm
A piece of copper alloy with a mass of 60.0 g is heated from 21.0 ?C to 44.0?C. In the process, it absorbs 507 J of energy as heat. What is the speci?c heat of this copper alloy.
The sulfide content in a pulp plant effluent is determined with a sulfide ion-slective electrode using the method of standard additions for calibration.
a) H2 (g) + Br2 (g) â?" 2 HBr (g) + heat [0.513] [0.62] [0.346] b) N2O4 (g) + heat â?" 2 NO2 (g) [0.0325] [0.022] c) NH4SH (g) â?" NH3 (g) + H2S (g) + heat [0.027] [0.0234] [0.209] Calculate Ke for the following (equilibrium concentrations give..
an 8 g sample of a copper ore was dissolved in an acid solution and then reacted with NO3- from a KNO3 salt solution. it required 71.5 ml of a .155 M KNO3 solution to fully react the copper in the ore sample.
What is the pressure of the gas in this mercury manometer if h = 73 mm and atmospheric pressure
Then the gas is cooled at a constant volume of 25.0L back to its original temperature. Then it contracts back at a constant tempurature to its original volume. Find the total heat flow for the entire process.
In combustion studies of the use of H2 as an alternative fuel, HO is sometimes formed in flames by the reaction, H(g) + 1/2 O2(g) HO(g) Use the data below to calculate the value of Kc
which portion of the titration curve are you in to reach pH = 7? Show your calculations to prove that dilution of 10,000 gal aniline requires 0.58 gal of this acid.
Aqueous solutions of phosphoric acid and sodium nitrite are combined, and the following equilibrium is established. H3PO4 (aq) + NO2- (aq) = H2PO4-(aq) + HNO2 (aq). The equilibrium constant Kc for this reaction is greater than one. Based on this i..
Calcium nitrate solution is added to a solution of sodium phosphate
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