Calculate the molar mass of the nonvolatile solute
A solution is made from 96 g of a nonvolatile solute in 80.0 grams of water. The solution has a vapor pressure of .312 atm at 75°C. Calculate the molar mass of the nonvolatile solute. The vapor pressure of pure water at 75°C is 0.380 atm
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Benzoic acid is a white crystalline powder used as a foodpreservative. The compound contains 5.0% hydrogen, 26.2% oxygen andthe rest is carbon. It has a molar mass of approximately 122g/mol.
How does nuclear magnetic resonance imaging allow us to see inside human bodies? In what other ways do you think this technology could be used?
Propane (C3 H8) reacts with oxygen (O2) to produce a carbon dioxide and water. The reaction is exothermic, with ΔH= -2220 kJ/mol. What is the heat of formation of propane?
A certain second-order reaction (B---products) has a rate constant of 1.00×10-3 M-1*s-1 at 27 C and an initial half-life of 294 s. What is the concentration of the reactant B after one half-life?
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A spherodial bacterium with diameter of 1 um contains two molecules of a particular protein. What is the molar concentration of the protein? How many gluclose molecules does the cell contain when its internal gluclose concentration is 1.0 mM?
Predict the distance between Si atoms in solid silicon. How does this compare to the distance between C atoms in diamond, Which has the same structure as solid silicon?
A 17.5 g mass of ice at 273K is added to 125g of H2O(l) at 325K at constant pressure. Is the final state of the system liquid or ice? calculate ?S for the process. Is the process spontaneous ?
An unknown compound has a formula XF3. If the mass spectra of the molecular ion has only 2 peaks, one of which has a mass of 68 amu and a relative intensity of 100% and a second that has a mass of 67 amu and a relative abundance of 24.2%.
The product gas from a solid fuel combustion reaction has the following dry-basis molar composition: 72.0% CO2, 2.57% CO, .0592% SO2, and 25.4% O2
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