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A lithium salt used in lubricating grease has the formula LiCnH2n+1O2. The salt is solublein water to the extent of 0.036g per 100.0g of water at 25C. The osmotic pressure of the solution is found t
Copper is sometimes coated on the bottom surface of cooking pans. Copper has a specific heat of 0.385 J/g 0C. A25.0-g sample of copper heated to 85.0 0C is dropped into water at an initial temperatu
A 150.0-g sample of metal at 80.0°C is added to 150.0 g of H2O at 20.0°C. The temperature rises to23.3°C. Assuming that the calorimeter is a perfect insulator,what is the specific heat o
Determine the density of an unknown liquid if the exact mass of 10.00 ml of this unknown at 25 0C is equal to 8.2148 g. (Report theanswer with the appropriate number of significant figures)
Consider two separate 1 litre vessels connected via a small tap which is initially closed. The first vessel contains 0.2 mole ofNH3 and the second vessel contains 0.4 mole ofCH4.
You are given a cube of silver metal that measures1.012 cm on each edge. The density of silver is 10.5 g/cm3. The cube is composed of6.08x1022 silver atoms. Because atoms arespherical, they cannot
Assuming that a cube has a volume of3.7x10-19cm3, calculate the length of each edge of the cube. Enter a number with the correct number of significant figures.
To recrystallize a solid, the solvent used must dissolve very little solid when cold and a lot of solid when hot. Explain why thesolid should dissolve very little when the solvent is cold.
When 35.6 L of ammonia and40.5 L of oxygen gas at STP burn nitrogen monoxide and water is produced. After the reaction return to STP how many grams of nitrogen monoxide is present.
A ground state H-atom absorbs a photon of wavelength 84.10 nm, andits electron attains a higher energy level. The atom then emits two photons: one of wavelength 3221 nm to reach an intermediate leve
The precipitate was separated from the supernatant liquidin (1) and was found to be insoluble in hot water. The precipitateturned grey-black upon addition of 6M NH3.
When Hg2+2 ion disproportionates, why does it becomeHg(s) and Hg2+ ion rather than form species with some other oxidation number?
In a calorimeter, 50.0 mL of 60 deg Celcius water is added to50 mL of 14.0 deg Celcius water. If the maximum temperature,Tm was determined tobe 36.0 deg Celcius, calculate the heat capaicty of the c
What are some good resources/links for a thorough yet decently quick review of chemistry (midterm 25th, final 30th). Any help would be greatly appreciated.
A sample of gas in a21.5-L container at 45.0 °C is cooled at constant pressure to a temperature of-37.0 °C at constant pressure. Determine the volume of the cooled gas. (convert temperature
Find the mass percentage ofNH4Cl, NaCl andSiO2 in an unknown mixture, if 5.0655 gm of this mixture when heated at 340 0C and cooled down to room temperature, it gives a mass of 4.9755 g.
If 50.0 mL of 10 degrees Celcius water is added to 40.0 mL of 65.0 degree Celcius, calculate the final temperature of the mixture assuming no heat is lost to the surroundings including the container
How much heat is required to raise the temperature of 50.0 grams of water from 55 degrees Celcius? Be sure to include units?
Pure benzene C6H6 freezes at 5.533 celsius. If a solution containing 10.86 g of C2H2Cl4 in 172.5 g of benzene freezes at 3.609 Celsius, then what is the Kfp of benzene?
In an experiment, 3.00 moles of N2 (g) and 4.00 moles of O2 (g) areadded initially to a 2.00 L reaction vessel. After equlibrium isreached, the concentration of NO(g) is determined to be 1.5 molespe
The enthalpy change for melting ice at 0°C and constant atmospheric pressure is 6.01 kJ/mol. Calculate the quantity of energy required to melt a moderately large iceberg with a mass of1.27 mill
The mass of an empty container is 76.35g. The mass of thecontainer when filled with an unknown liquid (d=1.25g/ml) is195.50g. What is the mass of the container when filled with mercury? The density
A gas expands and does P-V work on thesurroundings equal to 287 J. At the same time, it absorbs 216 J of heat from the surroundings. What is the change in energy of the system?
Solutions of sodium carbonate and silver nitrate react to form solid silver carbonate and a solution of sodium nitrate. A solution containing 8.25 g of sodium carbonateis mixed with one containing 6
A quantity of1.526g ofphenol(C6H6O) was burned in a constant-volume bomb calorimeter.Consequently, the temperature of the water rose by4.76C.