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The bond dissociation energy of H2 and Cl2 are 436 and 242 kJ/mol, respectively. The Pauling electronegativity of H and Cl are 2.3 and 3.2. What is the HCl bond dissociation energy
Determine the final concentration if A 134 ml portion of that solution is diluted using 147 ml of H 2 O?
A portable photometer with a linear response top radiation registered 83.2 microamps with a blank solution in the light path. Replacement of the blank with an absorbing solution yielded a response of 451 microamps calculate
Who does the first ionizaiton energy of the alkali metal in a given period compare with the first ionization energy of the halogen in the same period. What is the result in terms of how these elements tend to react with each other
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
Calculated what is the pressure exerted by the tweezers on the floor at the moment of impact
what is the density of a block of marble that occupies 306 cm3 and has a mass of 804 g? answer in units of g/cm3.
which of the following is the correct chemical formula for a formula unit of aliminum
sulfuric acid h2so4 is produced from water vapor sulfur dioxide and oxygen gas. write a balanced equation then
A 15 gram piece of iron is heated to a temperature of 47.0 ?C and then placed in contact with a 275 g piece of copper at 20.0 ?C (Cp = 25.46 J/mol-?C). What was the final temperature of the two pieces of metal?
The pressure on a balloon holding 350 mL of an ideal gas is increased from 254 torr to 1.00 atm. What is the new volume of the balloon (in mL) at constant temperature?
In a combustion experiment, .73g of an unknown hydrocarbon was burned in the presence of excess oxygen. This reaction produced .452 g CO2 and .087 g H2O. How many moles of carbon were in the original hydrocarbon sample
A 530. g piece of copper tubing is heated to 89.5°C and placed in an insulated vessel containing 159 g of water at 22.8°C. Assuming no loss of water and heat capacity for the vessel of 10.0 J/K
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