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A piece of metal with a mass of 4.2 g is heated to 100 degrees celesius and then placed in a coffee cup calorimeter that is initially 22.8 degrees celsius. Calculate the specific heat of the metal in J/g if the final temp is 24.2 degrees celscius. The heat capacity of the calorimeter is 651 j/c
Explain why a solution of one mole of potassiium carbonate in one litter of water has higher boiling point than a solution of one mole of sodium bicarbonate
Solid benzoic acid, C6H5COOH(s), is often used to determine the heat capacity of a bomb calorimeter, because the constant volume heat of combustion of this compound is known with high precision: qV = 26.434 kJ/g. When a 2.088 g sample of C6H5COOH(..
At the freezing point of ethanol, C2H5OH, -115 degree C, the Enthalpy of fusion is 4.60 kJ/mol. What is the the enthalpy change when 23.0 grams of ethanol melts?
The tank is first evacuated, and then it is connected to a 50.0 L cylinder of compressed nitrogen gas. The gas pressure in the cylinder, originally at 21.5 atm, falls to 1.55 atm without a change in temperature. What is the volume of the tank?
If the gas composition is 65% methane (CH4) by volume and 35% carbon dioxide (CO2) by volume, what mass, in kg, of each compound would be held within the container just at the release pressure
how many moles of nitrogen are in 5.3 L container at 1.25 atm and a temp of 85 degrees C.
The relative electrophoretic mobilities of a 30-kd protein and a 92-kd protein used as standars on an SDS polyacrylamide gel are 0.80 and 0.41, respectively.
Draw the structure of the organic product formed in the reaction of m - cresol with sodium hydroxide
Calculate the sample of concentration. Is this an appropriate concentration for 1H NMR, 13C NMR or both?
This equation means that no matter how much carbon monoxide and oxygen gas is added to the flask, only 2 moles of CO and 1 mole of O2 will react to make two moles of Co2.
What volume of Cl2 gas, measured at 682 torr and 40 degrees celcius, is required to form 26 g of NaCl ?
Anhydrous, primary standard sodium thiosulfate can be prepared from the pentahydrate, Na2S2O3 5H2O. How many grams of primary standard should be dissolved in 500.0 mL of water to make a 0.040 M solution
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