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Determine the osmotic pressure of a solution that contains 0.042 g of a hydrocarbon solute (molar mass = 340 g/mol) dissolved in benzene to make a 350-mL solution. The temperature is 20.0°C.
2.00 moles of a gas occupies 62.2 L at a particular temperature and pressure. Its density is 0.900 g/L. The standard molar volume is 22.4 L/mole. What is the molar mass.
If 4.00 g of the unknown compound contained 0.133 mol of and 0.267 mol of H , how many moles of oxygen, O , were in the sample?
Calculate the volume in milliliters of a 0.30 M acetic acid solution that contains 0.0142 mol HC2H3O2.
Calculate the pH of a buffer solution obtained by dissolving 22.0 g of KH2PO4(s) and 36.0 g of Na2HPO4(s) in water and then diluting to 1.00 L.
A solution (S1) of yellow # 5 has an absorbance far outside the linear region of Beer's law. In order to determine the concentration of this solution
Pinacol (2,3-dimethyl 2,3-butanediol) gives a mixture of pinacolone (3,3-dimethyl-2-butanone) and 2,3-dimethyl 1,3-butadiene by treating with acid.
what mass of solid sodium formate (of mw 68.01) must be added to 105 ml of 0.55 mol/l formic acid(HCOOH) to make a buffer solution having a ph of 3.96? ka=0.00018 for HCOOH
A gas-filled balloon having a volume of 2.50 L at 1.2 bar and 25°C is allowed to rise to the stratosphere (about 30 km above the surface of Earth), where the temperature and pressure are -23°C and 3.00 10-3 atm, respectively. Calculate the final v..
Assume that the kinetic energy of a 1250 kg car moving at 115 km/h could be converted entirely into heat. What amount of water could be heated from 19 C to 48 C by the car's energy.
A 10.0 L vessel at 20*C contains butane, C4H10(g), at a pressure of 2.00 atm. What is the maximum amount of work that can be obtained by the combustion of this butane if the gas is first brought to a pressure of 1 atm and the temperature is brough..
Consider the following reactions and select the false statement below. CO2(g) + OH?(aq) ? HCO3?(aq) Cr3+(aq) + 6H2O(l) ? Cr(H2O)63+(aq) A. in Cr(H2O)63+ the Cr3+ is attracted to the H2O molecules via ion-dipole intermolecular forces
What mass of water, in grams, produces 729 J when cooled from 58.0 degrees Celsius to 28.0 degrees Celsius? The specific heat capacity of water is 4.184 J/g.°C.
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