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Tungsten has a BCC structure, an atomic radius of 0.137 nm and an atomic weight of 183.84 g/mol. Compute its theoretical density.
Treating 1-butanol with sulfuric acid establishes an equilibrium with 1-butyl bisulfate and water as shown.
What substance is in excess? D) How many grams of the excess reactant is leftover (remaining) after the reaction stops
It takes 49.0 to raise the temperature of an 11.8 piece of unknown metal from 13.0 to 24.5. What is the specific heat for the metal?
A 50.0 mL solution of NH3 was titrated with 0.100 M HNO3. The volume of titrant required to reach the equivalence point was determined to equal 38.25 mL (Kb = 1.8 x 10^-5). what is the pH of the solution after 20.0 mL of HNO3 were added
Methane and oxygen react in presence of a catalyst to form formaldehyde (desired product). In a parallel reaction, methane is oxidized to form carbon dioxide and water
Calculate the bond order in the following species. Predict which of the two species in the following pairs has the higher vibrational frequency:
Calculate the concentration of solution containing one mole of phophate per litre
Calculate the pKa of the second ionizable group of Z.
A low melting metallic element has a vapor pressure of 28.2 torr at 458. oC. and a vapor pressure of 420. torr at 710. oC. What is the enthalpy of vaporization of this metal in kJ/mol?
A reaction has an activation energy of 32 kj/mol. If the temperature of the reaction doubles from 45 to 90 degrees by what factor will the ratio of the rate constants, k2/k1,change
At 200 K, the rate constant for the reaction of NO with ozone to give NO2 and O2 was found to be 1.3 x 106 L/mol•s. At 300 K, the rate constant increased to 9.9 x 106. Calculate the activation energy for the reaction in kJ/mol
What is the relationship between myelin sheath and dopmaine? What does myelin sheath do, how does it porvide insultion. What disease are caused when myelin sheath stops working and how does this effect elderly people?
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