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Determine the mass of this substance should evaporate in order to freeze 190 grams of water at 25 degree Celsius initially? It is given that the heat of fusion H2O= 334 specific heat of H2O= 4.18
For the following reaction KClO3---->KCl+1/2 O2 assign oxidation states to each element on each side of the equation. reactants and products. Which element is oxidized? Which element is reduced
A 1.50L sample of neon gas at 1.10 atm and 25 degrees celsius is heated to 45 degrees celsius. The neon gas is then subjected to a pressure of 1.50 atm. Determine the new volume of the neon gas.
A sample of H½O with a mass of 46.0 grams has a temperature of -58.0 C. How many joules of energy are necessary to melt 46.0 grams of ice? (Use 2.1 J/g.C for the specific heat of ice, and 334.4 J/g for the heat of fusion of water.)
The Goodyear blimps, which frequently fly over sporting events, hold approximately 1.60×105 ft^3 of helium. If the gas is at 25deg C and 1.0 atm, what mass of helium is in the blimp
As a solid, Fe adopts a body-centered cubic unit cell. How many unit cells are present per cubic centimeter of Fe. What is the volume of a unit cell of this metal
Assume that you have 1.65g of nitroglycerin in a 614.0 mL steel container at 20.0 C and 1.00 atm pressure. An explosion occurs, raising the temperature of the container and its contents to 425 C
The temperature of a 12.58 g sample of calcium carbonate increases from 23.6 c to 38.2 C. if the specific heat of calcuim carbonate is 0.82 J/g-K, how many joules of heat are absorb
1.00 mol HF and 0.500 mol NaOH are both dissolved in water making 1.00L solution. Calculate the pH of the solution
Erythromycin is a weak base that has a pkb of 5.20. Twenty-five ml of 0.30 M solution of erythromycin is titrated with 0.35 M nitirc acid . Calculate the pH in each of the following additions of acid.
In the combustion of propane for energy, how many kilojoules of heat are produced when 2 kilograms of propane are completely combusted in the presence of excess oxygen
Analysis with an elaborate instrument indicates that substance A contains two elements. Substance B and substance C react to give a new substance D
Assuming no energy is transferred to or from the surroundings, calculate the final temperature of the water after all the ice melts. Heat capacity of H2O(s) 37.7 J/(mol X K) Heat capacity of H2O(l) 75.3 J/(mol X K) Enthalpy of fusion H2O 6.01 KJ/m..
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