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Butylated hydroxytoluene (BHT) is utilized as an antioxidant in processed foods. It prevents fats as well as oils from becoming rancid. A solution of 2.505 g of BHT in110.0 g of benzene had a freezing point of 4.600°C. Explain what is the molecular weight of BHT?
the reaction is first order in and under certain conditions has a rate constant of 0.00752 at 20.0 . a reaction vessel
make a model of propane. if you substitute one bromine atom for one hydrogen atom how many isomers are possible? show
Find the equilibrium partial pressures of ALL species if at the start of the reaction PCO = 2.69 atm and PCOBr2 = 2.05 atm. Round your answers to three significant figures. CO(g) + Br2(g) ? COBr2(g)
what starting material are needed to prepare the following compound using malonic ester synthesis
The choice of precipitating reagent is important. Briefly explain what the consequences would be if excess 6M NaOH solution instead of 6M NH3 solution were used to separate Fe3+ and Al3+ ions from Ca2+, Cu2+,
Calculate the total charge in coulombs supplied by the battery. How long in hours will it take to recharge the battery back to the original sulfuric acid concentration using a currtent of 22.4A
A sample of helium gas has a volume of 900. milliliters and a pressure of 2.50 atm at 298 K. What is the new pressure when the temperature is changed to 336 K and the volume is decreased to 450. milliliters?
suppose you chose phenolphthalein , which changes color at the end point from colorness(acidic) to pink at pH8.5 .Would you need the same , more or less volume of NaOH in the back-titration?
iron is converted to Fe^2+ ions only and no Fe^3+ ions are formed. 25.0cm3 of the solution were acidified and titrated against a 0.0185 mol/dm^3 solution of potassium dichromate (VI). The volume required was 31.0cm^3. Calculate the percentage of i..
What fraction of the total residues are branch points? B) How many reducing ends does this amylopectin have?
3.8 g of a hydrocarbon fuel is burned in a calorimeter that contains 234 grams of water initially at 25.00 ? C. After the combustion, the temperature is 26.55 ? C
heat capacity of the bomb calorimeter is known to be 10.6 kJ/C From previous measurements,. Now determine the mass percent of naphthalene(C10H8) in the sample?
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