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A system absorbs 159 kJ of heat, and performs 83 kJ of work on the surroundings. What is the change in E of teh system?
The specific heat of iron metal is 0.450 J/g-K. How many J of heat are necessary to raise the temperature of a 1.05-kg block of iron from 25.0 Celcius to 88.5 Celcius
a solution of 120 ml of 0.150 m koh is mixed with a solution of 260 ml of 0.200 m niso4. how many grams of the
The activation energy for a given reaction is kJ/mol. What is the ratio of the rate constants for this reaction when the temperature is decreased
Differentiate between alkenes and alkynes, cis isomers and trans isomers. Describe how cis- trans isomers are used for night vision.
if clean magnesium metal burned in air it would form magnesium oxide. suppose the magnesium had a this oxide coating.
The pressure was exerted with a piston on molten naphthalene at 95 degrees C. The vapor pressure of naphthalene under 1.0bar is 2.0kPa and its density is 0.962g/cm^3. What is its vapor pressure when the pressure on the liquid is 15MPa
What weight of A would be removed from a solution of 10g of A in 100mL of water by a single extraction with 100 mL of hexanes? What weight of A would be removed by four successive extraction with 25-mL portions of hexanes?
a compound with the empirical formula ch2o was found to have a molar mass between 89 and 91 g. what is the molecular
What are the most important kinds of INTERmolecular forces present in each of the following substances
how many liters of hydrogen gas is formed from the complete reaction of 18.9 g c? assume that the hydrogen gas is
At a certain temperature and pressure 2.8 L of N2 reacts with 4.2 L of O2. If all the N2 and O2 are consumed, what volume of N2O3, at the same temperature and pressure, will be produced
Antimony pentafluoride (SbF5) is a member of a class of molecules called super acids. What is the predicted structure of the molecule
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