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Pure Ag melts at 961.8 degC and boils at 2162 degC. The heat of fusion for Ag is 11.28kJ per mol and the heat of vaporization is250.6kJ per mol.Calculate the entropy change for Ag from 961.7 degC to 2162.1degC.
How much heat is needed to warm 250 g of water from 22 C to 98 C? The specific heat of water is 4.18 J/g . Be sure to include units but do not use scientific notation.
A rock is a mixture of Uranium-238 and Lead-206. The molar ratio of Lead to Uranium is .1956. If the half-life for Uranium-238 is 4.5e9 years, how old (in years) is the rock
What is the limiting reactant in this experiment. The density of methyl salicylate is 1.18g/mL at 20degree C
100.0 g of nickel at 150 °C was placed in 1.00 L of water at 25.0 °C. The final temperature of the nickel-water mixture was 26.3 °C.
How many grams of heavy water are required to produce 145.0 mg of ND3(g). The mass of deuterium, D, is 2.014 g/mol
How many grams of sodium formate, NaCHO2, must be added to 750.0mL of .250 M of formic acid, HCHO2, to obtain a buffer with pH of 5.5
What volumes of the 0.10 M HA and 0.10 M NaA solution should be mixed to prepare the buffer?
It is important to allow each spot added to the chromatography paper to dry completely before adding another spot.
Some people think that driving a car, cooking on an outdoor grill, and using electricity produced by coal-fired generators contribute to global warming. What is the reasoning behind their thinking?
If 870 gm of NaCl, 416 gm of KMnO4 and 1000 gm of H2SO4 are mixed. which reagent is the limiting reagent
A total of 0.155 of this subunit was dissolved in enough water to produce 2.00 of solution. At 28 the osmotic pressure produced by the solution was 0.138 . What is the molar mass of the protein?
A chemist burns a a saltine cracker in a calorimeter containing 2.0 kg of water. The water temperature increases from 25.0°C to 29.7°C. Calculate the heat content of the cracker in J per cracker.
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