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The temperature rose by .910K. In a separate experiment in the camecalorimeter, the combustion of .825g/mol of benzoic acid, for which the internal energy of the combustion is -3251kj/mol, gave atem
In Joule's experiments, the slow lowering of a weight (through a pulley and cable arrangement) turned a stirrer in an insulated container of water. As a result of viscosity, the kinetic energy trans
How much heat is released as the temperature of 12.7 grams of copper tubing is decreased from 94.7°C to 43.2°C? The specific heat of copper is 0.385 J/g-°C.
A metal cube having a mass of 19.51 grams is dropped into a graduated cylinder containing 9.50 mL of water. This causes the water level to rise to 10.59 mL. What is the density of the cube in grams
When 0.270 g of the compound was dissolved in 50.0 g of camphor, the resulting solution had a freezing point of 177.9*C. (Pure camphor freezes at 179.8*C and has Kf = 37.7*C/m)
Combustion of a sample of this mixture of ethanol and octane (in the presence of excess oxygen) produced 208.09 g of water and 439.34 g of carbon dioxide.
A compound of iodine and cesium contains 63.05 g of metal and 67.75 g of nonmetal. How many grams of cesium are in 32.56 g of compound? How many grams of iodine?
What mass in grams of nitric acid is required to react with 454g of C7H8 and what mass in grams TNT can be made from 829g of C7H8?
How much a 6M Na2CO3 stock solution do you need to make 100 ml of a 10% Na2CO3 working solution? Describe how you would make the same solution given a bottle of anhydrous soduim carbonate (MW=105.9
The solution is weakly conducting compared with a solution of of the same concentration.Which of the following substances could the unknown be: KOH,NH3,HNO3,KClO2,H3PO3,CH3COCH3 (acetone)?
A 0.15g sample of pure ZnCl2*xH2O was placed on an ion exchange column in the H+ form. The H+ released in the eluate required 16.98mL of 0.1024M NaOH to reach a phenolphtalein end point.
Lead-206 has a relative abundance of 23.6%. What sized block of lead (in cubic centimeters) will contain 8.34x10^21 atoms of lead-206? The density of lead is 11.35 is g/cm3.
One mole of an ideal gas at 298K first doubles its volume during isothermal expansion and then returns to its original volume through isothermal compression. What is the entropy change of the syste
A 11.7 kg piece of metal at 94.9 C is placed in 481 g of water at 26.1 C in an insulated container. The metal and water come to the same temperature at 36.1 C.
Weigh out about 10 g of NaOH pellets and transfer them to 1 L bottle (preferably plastic as NaOH etches glass). Add about 600 mL of deionized water and mix until the NaOH dissolves. Add another 350
What weight of pure H2SO4 is present in each liter of concentrated sulfuric acid whose density is 1.86 g/ml and whichcontains 98% by weight H2SO4?
How many grams of concentrated hydrochloric acid, containing 37.9% HCl by weight, will give 5.0 grams of pure HCl?
The complete reaction of chromium metal with H2SO4 in then absence of air gave a blue solution of chromium(II) ions bounded to six water molecules and Hydrogen gas.
Nitrogen fixation in the root modules of peas and other leguminous plants is carried out by the molybdenum-containing enzyme nitrogenase.
Derive an equation for the probability that a particle characterized by the quantum number n is in the first 40.% (0 is less than or equal to x which is less than or equal to 0.40a) of an infinite d
The atmospheric pressure on Clouds Rest in Yosemite is only 523mmHg. Given that the Hvap of water is 40.67 kj/mol, calculate the temperature at which water will boil on Clouds Rest.
There are two compounds of titantium and chlorine. one compound contains 31.04% titanium by mass, and the other contains 74.76% chlorine by mass.
What is the maximum height achieved if a 0.500 kg mass is thrown straight upward with an initial speed of 55 m*s^-1? Ignore the effect of air resistance.
A 37.60 g sample of liquid aluminum at 955.0 oC is poured into a mold and allowed to cool to 23.0 oC. How many kJ of energy are released in this process?
A mixture of calcium oxide, CaO, and calcium carbonate, CaCO3 that had a mass of 3.454 g was heated until all the calcium carbonate was decomposed according to the following equation.