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How much energy is released during the complete combustion of 433 grams of cyclopropane
calculate the freezing point of a nonionizing antifreeze solution containing 388 g ethylene glycol, C2H6O2 and 409 g of water.
A 0.264-gram sample of an amino acid was dissolved in 95.0mL of water and titrated with 0.105M NaOH. The first equivalence point was found at V(OH)=16.3mL.
A study of the system 4NH3(g)+7O2(g)--2N2O4(g)+6H2O(g), was carried out. A system was prepared with [NH3]=[O2]=3.60 M as the only components initially.
Calculate the concentration of a red dye solution with an absorbance of 0.617. If you have 5.78ml of the solution how many mg of red dye are found in the solution.
If 3.93 g of sodium borohydride contains 2.5 × 10e23 H atoms, how many moles of H are present in 33 cm3 of sodium borohydride (of density 1.074 g/cm3)?
A 15.00 mL sample of unknown concentration of sulfuric acid is precititated with excess lead(II) nitrate and a precipitate of lead(II) sulfate is collected.
Compute the mass of salt required to bring the freezing point of 200 mL of H 2 O from 0 degrees C to -5 degrees C.
A 4.70 g nugget of pure gold absorbed 285 J of heat. The initial temperature was 24.0°C. What was the final temperature.
Are the following statements about a 1.0 M solution of a strong acid, HA, true or false? [A-] › [H+]: True/False
2.0 moles of a nonelectrolyte solute are added to 1.0 kg of an unknown solvent. The freezing point is depressed by 7.9 K. Calculate the molal freezing point constant (Kf?) for this solvent.
A gaseous mixture of O2 and Kr has a density of 1.111 g/L at 420. torr and 300. K. What is the mole percent O2 in the mixture?
What is the Volume of 0.8 mol of Benzene (C6H6) at 20.7 degrees C. The density of Benzene is 0.879 g/mL
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