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Now that the acid has been standardized and you know it is 0.2496 M H2SO4, you perform the actual experiment as follows: A 2.700g- sample of meat is subjected to Kjeldahl analysis. The liberated NH3(g) is absorbed by adding 50.00 mL of H2SO4(aq), which is more than enough. The excess acid requires 19.90 mL of 0.5510 M NaOH for its complete neutralization. What is the percentage of protein in the meat?
A second worker approaches to within 5 meters behind a shield that attenuates 60% and remains there for 20.0 minutes. What is the ration between the absorbed doses for the two workers
A 100 liter air tank housed in a gas station ruptured suddenly and air originally at 5atm escaped to the surroundings at 1atm and 25°C. Find ?S of air, had it been let out slowly in a reversible manner
A 455-g piece of copper tubing is heated to 89.5 Celcius and placed in an insulated vessel containing 159g of water at 22.8 degrees Celcius. Assuming no loss of water and a heat capacity of 10.0 J/K for the vessel, what is the final temerature? (c..
What is the largest alkane (number of carbons) that can be named not exceeding "decane" as a parent? Where is the primary How many What family. I.e. what Where and what carbons? Is the primary functional group?
A and B are stereoisomers. They are nonsuperimposable and are mirror images of one another. Which of the following best describes the relationship between A and B
If a 1000 kilogram sample of rock is 0.021% gold by mass, how much zinc is needed to react with the gold extracted from the rock? Assume that the reaction is 100% efficient.
The indicator propyl red has Ka = 3.3 × 10-6. What would be the approximate pH range over which it would change color?
An empty aerosol can at 25 degree celcius still contains gas at 1.00 atmosphere pressure. If an empty can is thrown into a 488.2 degree celcius fire, what is is the final pressur in the heated can.
what adjustment should be made to the mobile phase to bring the compound off sooner? why?
Explain how the calculated percent NaHCO3 and Na2CO3 by mass would be affected if the initial mixture were wet with water.
Is it possible for the activation energy of a reaction to be negative? Explain your conclusion and provide a molecular level explanation.
In photosynthesis, plants use energy from the sun in combination with carbon dioxide and water to form glucose (C6H12O6) and oxygen. If 4.50 moles of water react with carbon dioxide, what mass of glucose is produced?
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