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A 1.0 kg bar of copper is heated at atmospheric pressure and its temperature increases from 20 degree celsius to 50 degree celsius. What is the work done by the copper bar on the surrounding atmosphere? The density of copper at 20 degree celsius is equal to 8920 kg/m3.
What is the pH of a buffer that results when 0.50 mole of Na3PO4 is mixed with 0.75 mole of HCl and diluted with water to 1.00 L? The acid dissociation constants for phosphoric acid
A reaction in which A,B ,C and react to form products is first order in A, second order in B, and zero order in C. What is the overall order of the reaction?
The density of liquid octane, C8H18, is 0.7025 g/ml. If 1.00 mL of liquid octane is vaporized at 100 degrees Celsius and 725 torr, what volume does the vapor occupy?
Calculate the Î"S for a gas in a closed system that is an ideal monatomic gas initially at P= 5 atm, V=5L, and T = 310 K which expands to V= 10 L and its temperature is increased to 390 K
Use net ion equations to show how ammonium chloride (NH4Cl) is acidic and sodium acetate
How many moles of each of the following were in the original sample?
At 1 atm, how much energy (kJ) is required to heat 65.0 g of H2O(s) at -20.0 degrees C to H2O(g) at 135.0 degrees C?
If the propanoate ion comes from strontium propionate, Sr(C3H5O2)2 then how many grams of strontium propanoate are needed? Assume it is completely soluble.
At 25°C, 1.0 g of caffeine is dissolve into 47 ml of water, 18 ml of dichloromethane, into 86 ml of benzene, or into 270 ml of diethyl ether. Which solvent would provide the largest extraction coefficient (KD). Briefly explain.
The mass of calcium fluoride that results from the reaction of 3.00 grams of calcium and 2.00 grams of fluorine is 4.02 grams. What is the percent yield?
Calculate the standard free energy change for silver sulfate dissolution at 25 degrees Celsius.
If the initial pressure of iodoethane is 894 torr at 245°C, what is the pressure of iodoethane after three half-lives?
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