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Calculate the amount of heat required to completely sublime 99.0 g of solid dry ice CO2 at its sublimation temperature. The heat of sublimation for carbon dioxide is 32.3 KJ/Mol
How many molecules of would be formed from the reaction mixture that produces the greatest amount of products?
A piece of a newly synthesized material of mass 25.0g at 80 degrees C is placed in a calorimeter containing 100g of water at 20 degrees C. If the final temp of the system is 24 degrees C, what is t
The sum exerts a gravitational force of 4.0 * 10^28 N on the earth, and the earth travels 9.4 * 10^11 m in its yearly orbit around the sun. How much work is done by the sun on the earth each year?
How many liters of oxygen gas can be produced at STP from the decomposition of 0.125 L of 3.00 M H2O2 in the reaction according to the chemical equation shown below?
An aqueous CaCl2 solution has a vapor pressure of 82 mm Hg at 50C. The vapor pressure of pure water at this temperature is 92.6 mmHg. What is the concentration of CaCl2 in mass percent?
Assuming H and S do not vary with temperature, at what temperature will the reaction shown above become spontaneous?
Give an explanation for how calmagite works as an indicator for the titration of magnesium ion with EDTA. Explain why the water sample was buffered before it was titrated with EDTA.
A scuba diver with a lung capacity of 5.1 L inhales a lungful of air at a depth of 44 m and a pressure of 5.4 atm.If the diver were to ascend to the surface (where the pressure is 1.0 rm atm) while
35.5 grams of an unknown substance is heated to 103.0 degrees Celsius and then placed into a calorimeter containing 100.0 grams of water at 24.0 degrees Celsius. If the final temperature reached in
Assuming the solution has a heat capacity of 4.18 J/°C·g and assuming no heat loss to the calorimeter, calculate the enthalpy change for the dissolution of NH4NO3 in units of kJ/mol.
A sample of air contains 78.08 % nitrogen, 20.94 % oxygen, 0.05% carbon dioxide, and 0.930% argon by volume. How many molecules of each gas are present in 1.00 L of the sample at 39 C and 1.00 atm?
A 45-g piece of ice at 0 degrees C is added to a sample of water at 9 degrees C. All of the ice melts and the temperature of the water decreases to 0 degrees C. How many gram sof water were in the
Determine the percent yield for the reaction between 28.1g of Sb4O6 and excess c if 17.3 of Sb is recovered along with an unknown amount of CO.
If the three gases are mixed in a rigid container at 500 K so that the partial pressure of each gas is initially one atm, what will happen?
when carbon is burned in the presence of oxygen, the carbon and oxygen combine to produce carbon dioxide. if you start with 3 grams of carbon and 8 grams of oxygen and they react completely, how man
Estimate the mass of water that must evaporate from the skin to cool a body by 0.90 degrees Celcius, if the mass of the body is 94 kg and its heat capacity is 4.0.
Calculate the molar mass of the biomolecule. For carbon tetrachloride, the boiling point constant is 5.03°C · kg/mol, and the boiling point of pure carbon tetrachloride is 76.50°C.
A steel cylinder holds 1.60 g of ethanol, C2H5OH. What is the pressure of the ethanol vapor if the cylinder has a volume of 244 cm3 and the temperature is 250°C?
If you place 7>50 mg of Xe(CF3)2 into a flask, how long must you wait until only 0.25 mg of Xe(CF3)2 remains?
The concentration of cholesterol in the blood serum of a normal adult is approx 200mg/dL. How many grams of cholesterol does a person with a blood volume of 5.75L have circulating in his or her bloo
Calculate the final temperature of the mixture assuming no heat loss to the surroundings. The heat capacities of H2O(s) and H2O(l) are 2.08 and 4.18 J/g · °C, respectively
Calculate the molecular mass of the nonionic solutes: 8.02 g of solute in 861 g of water lower the freezing point to -0.430 degrees C.
What is the change in enthalpy when 18.4 g of steam at 100?C is converted to liquid waterat the same temperature and pressure? Theheat of vaporization of water is 40.7 kJ/mole. Answer in units of kJ
Assume that the heat required for the vaporization of the alcohol comes only from the aluminum block and that the alcohol vaporizes at 25.