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A 30.4-g sample of an alloy at 93.00°C is placed into 50.0 g of water at 22.00°C in an insulated coffee-cup calorimeter with a heat capacity of 9.20 J/K. If the final temperature of the system is 31.10°C, what is the specific heat capacity of the alloy?
1. If 1.9 moles of a gas are held in a container at 5.00 atm and 4.8x103 mL, what is the temperature of the gas? 2. What is the mass of 72.6 L of hydrogen gas held at a temperature of -48.0oC and a pressure of 680.4 mm Hg?
At an altitude of 45.00 km, the average atmospheric temperature is essentially 0 degrees C. What is the average number of air molecules per cubic centimeter of air at this altitude?
The Vapor pressure of pure water at 25 Celcius is 23.8 torr. What is the vapor pressure (torr) of water above a solution prepared by disolving 18.0 g of glucose (a nonelectrolyte, MW = 180.og/mol) in 95.0g of water
Question- A lot of digestive enzymes use the same catalytic mechanism but break the peptide bond at different places. Why is that the case
What is the value of the reaction quotient, Q, for the cell that is constructed from the two half-reactions when the Zn2+ concentration is 0.0100 M and the Ag+ concentration is 1.25 M
A precipitate again formed and was filtered off. Finally, the solution was treated with a sodium carbonate solution, which resulted in no precipitation. Which metal ions were definitely present, which were definitely absent, and which may or may n..
what is the ground state electron configuration of atomic al? what electronic states are possible with this electron
Question- 1) A 2.00 g sample of a particular compound was dissolved in 15.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85ºC.
What is the buffer solution? What characteristics make this solution a buffer solution?
The molar heat of vaporization of benzene at 1atm is 30.8kJ/mol. The boiling point of benzene at 1atm is 78.3C. Calculate the entropy change when 11.5g if benzene boils at this temperature
what is the voltage after the addition of the following volume of NaI solution? The reduction potential for the saturated calomel electrode is E = 0.241 V. The standard reduction potential for the reaction is E0 = 0.79993 V.
Question- A particular reactant decomposes with a half-life of 173 s when its initial concentration is 0.308 M. The same reactant decomposes with a half-life of 225 s when its initial concentration is 0.237 M. Determine the reaction order: 0,1,2
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