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a 200 gram sample of a large biomolecule was dissolved in 15 grams of carbon tetrachloride. the boiling point of this solution was determined to be 77.85 degees celcius. calculate the molar mass of the biomolecule.
A solution containing 50.0 g NaNO3 in 75.0 g of H20 at 50°C is cooled to 20°. How many grans of NaNO3 remain at 20°.
liquid NCl3 in a 2.50L closed container is heated until it decomposes completely to gaseous products. the resulting mixture exerts a pressure of 745mm Hg at 95 degrees celsius
Calculate the theoretical yield of C2H5Cl when 138 g of C2H6 reacts with 244 g of Cl2, assuming that C2H6 and Cl2 react only to form C2H5Cl and HCl.
A 0.456 gram sample of an unknown monoprotic acid (let's call it HZ) was dissolved in some water (you pick the amount). Then the acidic solution was titrated to the equivalence point with 32.5 mL of 0.174 M KOH.
The atomic weight of a newly discovered el- ement is 110.352 amu. It has two naturally occuring isotopes. One has a mass of 111.624 amu.
A 17.0-g sample of ice at -19.0°C is mixed with 101.0 g of water at 87.0°C. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
Write equations for the reaction of the glyceride written in question 1 above with each of the following: a. an aqueous solution of sodium hydroxide b. hydrogen in the presence of a catalyst and at elevated temperature and pressure c. a 5% solutio..
A chemist dissolves 0.099 g of CuSO4 · 5 H2O in water and dilutes the solution to the mark in a 500-mL volumetric flask. A 36.1-mL sample of this solution
The latent heat of vaporization of mercury is around 300,000 J/kg. What is the least amount of mercury (in kg) that can be vaporized when 3 million joules are introduced?
Capsaicin, the compound that gives the hot taste to chili peppers, has the formula C18H27NO3. (a) Calculate its molar mass.
What quantity of heat would be evolved if 75.00g of mercury (Hg=200.59), (O=16.00) was burned in oxygen?
Why Do I Require More CaCO3 to Raise pH than Predicted? If you can remember back to a discussion and inquiry we exchanged last week concerning the use of sodium carbonate vs. calcium carbonate
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