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Lactose, C12H22O11, is a naturally occurring sugar found in mammalian milk. A 0.335 M solution of lactose in water has a density of 1.0432 g/mL at 20 degrees Celsius. What is the concentration of this solution in the following units?
a) mole fraction
b) mass percent
c) molality
calculate the molar concentration and the molarity of a sulfuric acid solution of density 1.198 g/mol,
the term vapor pressure almost always means the equilibrium vapor pressure. what pysical arrangement is needed to
describe how sp3 hybridization occurs in each atom. a) carbon b) nitrogen c) oxygen. If these elements use sp3 hybrid orbitals to form bonds, how many lone pairs of electrons would be found on each?
identify the functional group; and 3) and discuss general key chemical properties of the chemical that a fire, environmental, health or safety personnel should know.
has a standard free-energy change of -4.00 kJ/mol at 25 °C. What are the concentrations of A, B, and C at equilibrium if, at the beginning of the reaction, their concentrations are 0.30 M, 0.40 M, and 0 M, respectively
How much work is done in kilojoules when the volume of a cylinder goes from 2L to 3L and stays at 2.5 atm? Are the surroundings doing work on the system or system doing work
2-chloro-butane is obtained when 1-butene and 2-butene react with HCl. Which has the greater free energy of activation and why
A low melting metallic element has a vapor pressure of 28.2 torr at 458. oC. and a vapor pressure of 420. torr at 710. oC. What is the enthalpy of vaporization of this metal in kJ/mol?
How much PV work is done in kilojoules for the reaction of 0.48 of with 0.24 of at atmospheric pressure if the volume change is -9.2
The following data were recorded in the analysis of erythropoietin in a plasma sample, as mg/dL. Which of the results, if any, could be statistically rejected with 95% confidence?
Calculate the maximum mass in grams of H2S that can form when 155 g aluminum sulfide reacts with excess water according to: Al2S3 + H2O => Al(OH)3 + H2S [unbalanced]
If some air remained in your syringe along with the natural gas sample, would that make your result greater or less than the actual molar mass of natural gas? is the same true for your sample of unknown gas?
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