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These reactions are coupled so that the overall process is energetically favorable. What is Delta G for the overall process?
A 31.0-g sample of water at 260. K is mixed with 48.0 g water at 320. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
An aerosol spray can of deodorant with a volume of 350 mL contains 3.2 g of propane gas C3H8 as propellant. What is the pressure at 20 degrees Celsius?
An aqueous solution is 22.0% by mass silver nitrate, AgNO3, and has a density of 1.22 g/mL. What is the molarity of silver nitrate in the solution?
The heat of combustion of naphthalene is -5.15* 10^3 kJ/mol the heat capacity of the calorimeter is 802 J/K. the specific heat capacity of water is 4.184 J/gk How much will the temperature rise?
What mass of melamine will be obtained from 168 kg of urea if the yield of the overall reaction is 79.0%
How much 100 proof whiskey (50% ethanol by volume) must be imbibed to reduce the activity of his LADH towards methanol to 5% of its original value?
The solubility of N2 in water is 2.2 x 0.0001 g in 100 g of H2O at 20 celcius when the pressure of nitrogen over the solution is 1.2 atm. calculate the solubility at that temperature when the nitrog
When steam condenses to liquid water, 2.26kJ of heat is released per gram. The heat from 168g of steam is used to heat a room containing 6.44 X 10power of 4 of air. The specific heat of air at norma
Using the values for the resonance energies of benzene and naphthalene given above, explain why Diels-Alder reactions of anthracene take place at the center ring, not one of the end rings.
A 255- flask contains pure helium at a pressure of 754 . A second flask with a volume of 470 contains pure argon at a pressure of 726 torr. If the two flasks are connected through a stopcock and the
A 0.100L sample of a solution containing an unknown concentration of sodium hydroxide requires 22.7 ml of 1.00 M sulfuric acid to completely neutralize. What is the concentration of the sodium hydr
The solubility of Zn(OH)2 is 2.0 x 10-6 M at a certain temperature. Determine the value of the Ksp at this same temperature.
Bone was dissolved in hydrochloric acid, giving 45.0 mL of solution containing calcium chloride, CaCl2. To precipitate the calcium ion from the resulting solution, an excess of potassium oxalate was
Starting with 50.0 g of CaCO3(s) and 100 mL of 1 M HF, how many moles of CO2 can be produced?
A 25.0 mL sample of river water was titrated with 0.00100 M Na2Cr2O7 and required11.5 mL to reach the end point. What is the COD, in mg O2 per litre of the sample?
particular sample of pure iron requires 0.595 kJ of energy to raise its temperature from 25oC to 45oC. The specific heat of iron is 0.45 J/g oC. What must be the mass of the sample?
When separated from a water solution, CuSO4 forms a hydrate with 5 water molecules per formula unit. If 38 g of anhydrous CuSO4 are dissolved in water, what mass of the hydrate could be recovered f
A sample of gas is collected over water at a temperature of 35.0?C when the barometric pressure reading is 625 torr. What is the partial pressure of the dry gas, given PH2O = 42.2 torr?
A solution is made by dissolving 31.0 g of NaOH in approximately 450 mL of water in a volumetric flask. The solution becomes quite warm, but after it is allowed to return to room temperature, water
Calculate the quantity of heat in calories release when 241.62 g of water is cooled from 80.6°C to 28.0°C.
If a 100.0 g sample of water at 60.0 degreesC is added to a 100.0 g sample of water at 10.0 degrees C, determine the final temperature of the water.
A gas is placed in a storage tank at a pressure of 20.0 atm at 20.3 DEGREES CELSIUS. As a safety device, there is a small metal plug in the tank made of a metal alloy that melts at 125 DEGREES CELS
A 62g piece of ice at 0 degree celsius is added to a sample of water at 9 degree celsius. All of the ice melts and the temperature of the water decreases to 0degree celsius. How many grams of water