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Terephthalic acid is a significant chemical used in the manufacture of polyesters and plasticizers. It contains only C, H, and O. Combustion of 15.85 mg terephthalic acid produces 33.58 mg CO2and 5.16 mg H2O. If 0.250mol of terephthalic acid has a mass of 41.5 g, determine the molecular formula of terephthalic acid.
Nitrogen (80 kPa), oxygen (21.0 kPa), carbon dioxide (0.03 kPa), and water vapor (2.0 kPa) are the usual atmospheric components. What is the total atmospheric pressure in kPa.
How many cubic centimeters of an ore containing only 0.22% gold (by mass) must be processed to obtain $100 worth of gold.
the reaction a->b=c is found to be a zero order. If it takes 4.3 x 10^2 secounds for an initial conventration of A to go from .50 M to .25 M, what is the rate constant for the reaction
Express the concentration of a .0560 M aqueous solution of flouride, F-, in mass percentage and in parts per million. Assume the density of the solution is 1.00g/mL.
While did the mammoth live. Presume that living organisms have a carbon-14 decay rate of 15.3 dis/min gC as well as that carbon-14 has a half-life of 5730 yr
How many grams of Na2SO4 are there in 15 mL of 0.50 M Na2SO4? (b) How many milliliters of 0.50 M Na2SO4 solution are needed to provide 0.038 mol of this salt?
What is the net charge at neutral pH of a tripeptide containing only alanine? How does the total number of negative and positive charges change following hydrolysis of the tripeptide
When 0.490 kJ of heat is added to the gas, it expands and does 211 J of work on the surroundings. What is the value of delta H and delta E for this process?
the density of plutonium metal is 19.84 g/cm3 , and the density of plutonium (IV) oxide is 11.46 g/cm3. over a period of 7-10 years, a 2.5-kg sample of plutonium metal stored at Los Alamos National Laboratory in New Mexico was converted to plutoni..
The half-life of Sr-90 is 29 years. What fraction of the atoms in a sample would remain after 100 years. How would you compute this
Determine the pressure in Standard atmospheres,Torr and mm Hg units when A gauge on compressed gas cylinder reads 1500 psi ( pounds per square inch; 1 atm =14.7 psi).
Which alkyl bromide reacts fastest with silver nitrate in ethanol- butyl bromide, sec-butyl bromide, or tert-butyl bromide? Which reacts slowest? Explain how structure affects the rate in the SN1 reaction.
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