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Explain a compound has a molar mass of 598 g/mol. Define if 35.8 mg of the compound is dissolved in adequate water to make 175mL of solution at 25 0C, define what is the osmotic pressure of the resulting solution?
If the Km of carbonic anhydrase for the above reaction is 1.8 mM, what is the catalytic efficiency of this enzyme under these conditions? The units are s-1M-1.
A calibration curve for absorbance versus the concentration of the chemical indicator crystal violet is found to have a slope of 19. If a sample of unknown concentration has an absorbance of 1.32
A buffer is made by mixing 0.241 moles of acid with 0.217 moles of its conjugate base. 0.01 moles of NaOH is added to the buffer. Find the pH of the resulting solution
If the final solution has a chloride ion concentration of 1.80M which choice is closest to the concentration of the original SrCl2 solution?
What is the theoretical yield of aspirin if 175 kg of salicylic acid is allowed to react with 118 kg of acetic anhydride?
Use the information given to determine the ?Hof of NO(g) in the reaction below. 4NH3(g) + 5O2(g) ? 4NO(g) + 6H2O(g) ?Horxn = -902.0 kJ (NH3(g) ?Hof = -45.9 kJ/mol; H2O(g) ?Hof = -241.8 kJ/mol)
When 25.0ml of 0.500M H2SO4 is added to 25.0mL of 1.00M KOH in a coffee-cup calorimeter at 23.50 celcius, the temperature rises to 30.17 celsius. Calculate delta H of this reaction
If 50.00mL of propylene glycol has am ass of 51.80g, what is its density in SI units (kg/m^3).
A lab bench has 3 one L stoppered flasks. Flask A contains one mole of NH3 gas. Flask B contains one mole of N2 gas & Flask C contains one mole of SO2 gas. All are at the same temperature.
White phosphorus is a molecular solid made of molecules of P4. A 3.88 g sample of white phosphorus starts at 24oC. Calculate the amount of heat (in J) required to melt the sample.
Drawa a fat (oil) molecule representing corn oil. The fatty side chains that you need to include are two of the esters group derived from oleic acid and one from the linoleic acid
Predict what a plot of temperature versus the volume of distillate will look like for the simple distillation and the fractional distillation of (a) a cyclohexane-toluene mixture and (b) an ethanol-water mixture.
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