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535 g piece of copper tubing is heated to 91.5°C and placed in an insulated vessel containing 58.5 g of water at 29.5°C. Assuming no loss of water and heat capacity for the vessel of 10.0 J/K, what is the final temperature of the system (c of copper = 0.387 J/g·K)?
Calculate the pH of a buffer solution that contains 0.25 M benzoic acid (C6H5CO2H) and 0.15 M sodium benzoate (C6H5COONa). [Ka = 6.5 ? 10-5 for benzoic acid]
the density of diamond is 3.51 gcmnbsp . thenbsp international but non-si unit for weighingnbsp diamonds is the carat 1
a galvanic cellnbsp is set up at the temperature od 298 k using the given reaction fe fe2 0.10 m cd2 0.95 m cd
Which of the following acids (listed with pKa values) and their conjugate base would form a buffer with a pH of 8.10
if the ethyl alcohol at 35 degree rise through 8.36 cm in a capillary tube of radius 0.20 mm what is surface
a container holds 2,0 of gas. the total average change in KE of gas molecules in the container is equal to the the sum of KE of an 8,0x10^-3 -Kg bullet with speed
calculate the molar solubility of calcium carbonate in 0.050 molar calcium chloride and ksp for calcium chloride is 3.8X10^-9.
How many grams of CaH2 (Molar Mass = 42.1 g/mol)are needed to generate 10.0 L of H2 gas if the pressure of H2 is 769 torr at 28.0°C?
a gas mixture contains helium and oxygen at respective partial pressures of 255 torr and 0.450 atm. what is the total
Write equations showing how each of the following weak bases ionizes water to form OH- a) HCO3- b) CH3NH2 Identify all of the phases
H2s and H20 have similar structures and their central atoms belong to the same group. Yet H2S is a gas at room temperature and H20 is a liquid. Use bonding principals to expalin why this is.
How many grams of CH3OH must be added to water to prepare 150mL of a solution that is 2.0 M CH3OH?
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