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The atomic radius of nickel is 124 pm, and the average mass of nickel is 58.6934 amu. How do I calculate the density of nickel assuming that it is simple cubic, then body-centered cubic, and then face-centered cubic cell structures.
.80g of hydrogen chloride () is dissolved in water to make 4.5L of solution. What is the pH of the resulting hydrochloric acid solution
At 25 degrees celcius a sample of NH3 effuses at a rate of .050 mole per minute. Under the same conditions, which gas effuses at approximately one-half that rate?
Draw a free body diagram of a container of water that you are holding, you walk with the container at a constant speed and then stop abruptly.
A 35.6 g sample of ethanol (C2H5OH) is burned in a bomb calorimeter, according to the following reaction. If the temperature rose from 35.0 to 76.0°C and the heat capacity of the calorimeter is 23.3 kJ/°C, what is the value of DH°rxn. The molar ma..
The heat of reaction for the combustion of cyclobutane, C4H8, is 650.3 kcal/mol. What is the heat of combustion for cyclobutane in kcal/gram?
Complete the reaction mechanism below for the first two steps of the dehydration of 2,3-dimethylpentan-2-ol.
A solution of hydroiodic acid is 0.057 M HI. What is the hydronium-ion concentraion at 25 degrees C?
using a nitrogen gas sample in a container with capacity 1.64 litres a pressure of 121 atm is exerted by this gas
Given that the standard free energy of formation of MCl2(s) and MO2(s) are, respectively, -311.5 and -286.5 kJ/mol at 25o C. What is the standard change in free energy (kJ) for the following reaction
What concentration of the salt NaC2H3O2 must be added to shift the equilibrium toward the reactants so that the [H3O+] concentration is reduced to pH = 5.5
Use Huckel molecular orbital theory to answer the following questions. Express energies as functions of the parameters α and β. Write down the secular determinant and calculate the π molecular orbital energy levels of ethene.
NO+ and NO- are also known. Compare the bond orders of these ions with the bond order of NO. Which of the three would you predict to have the shortest bond? Why?
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