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A solution is prepared by dissolving 267 g of sucrose (C12H22O11) in 624 g of water. What is the vapor pressure of this solution at 30°C? (The vapor pressure of water is 31.8 mmHg at 30°C.)
The solubility of CO2 in water at 25°C and 1 atm is 0.034 mol/L. What is its solubility under atmospheric conditions? (The partial pressure of CO2 in air is 0.0003 atm.) Assume that CO2 obeys Henry's law.
A 2.28-g sample of a salt dissolves in 9.10 g of water to give a saturated solution at 25°C. What is the solubility (in g salt/100 g of H2O) of the salt? 1 g salt/100 g of H2O
What concentration of glucose will be isotonic with 1.2% CaCl2 solution? Assume a van't Hoff factor of 2.8 for the CaCl2 solution. The molar masses of glucose and CaCl2 are 180.2 g/mol and 111.0 g/mol, respectively.
The introduction state that often the rate doubles for each temperature increase of 10degree celcius. What value of the activation energy would cause the rate to double between 25~35degree celcius? ((k value)
Are we concerned with the amount of sample that we use in this experiment and list at least three pros and cons for using a small sample under 0.05g and a large sample over 2.0g
What are the respective concentrations (M) of Na and SO4 ions formed by dissolving 0.600 mol Na2SO4 in 135 mL water?
Neon crystalizes in a face-centered cubic lattice. It's density is 1.45 g/cm3. What is the edge length of the unit cell? Note: The atomic weight of Ne is 20.2 g/mol, and Na is 6.02 x 10^23/mol
a miner working 260 m below sea level opened a carbonated soft drink during lunch break. to his surprise the soft drink
What is the density (in grams per liter) of a gas mixture that contains 20.5% F2 and 79.5% He by volume at 793mm Hg and 28.5C
What is the isotopic difference (in per mil) at 25degrees between gas, liquid, and solid phase for the elements carbon and sulfur. Show calculations
An incompletely resolved mixture of (-)-?-methylbenzylamine and (+)-?- methylbenzylamine contains 75% of the (-)-enantiomer. What is the optical purity of the sample
How would the calculated molar mass change(increase,decrease,no change) if the following experimental problems were encountered? explain the reason for your answer. (a)the unknown was impure and only part of the unknown dissolved in the lauric aci..
Calculate the de Broglie wavelength of a neutron moving at 1.17% of the speed of light. _____m
How much of the 37.0% HCl concentration stock do you need to prepare this solution?
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