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When 23.0 mL of 0.600 M H2SO4 is added to 23.0 mL of 1.20 M KOH in a coffee-cup calorimeter at 23.50°C, the temperature rises to 30.17°C. Calculate ?H of this reaction. (Assume that the total volume is the sum of the individual volumes and that the density and specific heat capacity of the solution are the same as for pure water.)
H per mole of H2SO4 reacted: ? kJ/molH per mole of KOH reacted: ? kJ/mol
Concentrated HF, molar mass 20.01 g/mol, comes into the lab as a 49.0% solution with a density of 1.18 g/ml. What is it's molarity
The activation energy for the denaturation of a protein is 391.0 kJ/mole. At what temperature will the rate of denaturation be 19 percent greater than its rate at 25.00 degrees Celsius?
Suppose 108.3 g of hydrogen peroxide decomposes and all of the oxygen gas is collected in a balloon at 1.00 atm and 25oC. Determine the volume of the balloon.
A certain stock ammonium sulfate solution is 40.0% ammonium sulfate by mass and has a specific gravity of 1.228. What is the molarity of the solution
Molar mass has the units of grams/mole. Molar mass serves as a conversion factor between numbers of moles and mass. If you know how many moles you have, you can calculate their mass; if you know the mass of a sample, you can calculate the number o..
an unknown gas composed of a diatomic molecule effuses at a rate that is only 0.355 times as fast as that of oxygen gas
viniger is made by adding 33 g of acetic acid to 625 g of water what is the percent by mass of acetic acid in the solution of viniger?
How many grams of NaN3 are required to produce 20.0 ft3 of nitrogen gas if the gas has a density of 1.25 g/L?
A sample of argon has a volume of 205 cm3 when its temperature is -44.0 oC and its pressure is 712 mm of Hg. What would be the volume of the argon at STP?
What is the mass percent of sucrose (C12H22O11, Mm=342 g/mol) in a 0.350-m sucrose solution?
Calculate the molality of the solution and the 95% CL, and write the final result with correct format.
a 155 gram sample of copper was heated to 150 degrees Celsius then placed into 250 gram of water at 19.8 degrees Celsius. Calculate the final temperature of the mixture.
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