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Determine the number of vacancies per cm3 in gold at 900?C, given a vacancy formation energy of 0.98 eV/atom and an Arrhenius pre-exponential factor of one
Describe in 75 words the structure of the carbon atom. What types of bonds does carbon form and why?
What is the nature of the substance(non polar, polar, ionic) and intermolecular force(ionic or van der waals if van der walls give type including h-bond)
How many grams of ethylene glycol C2H6O2 must be added to 1.15kg of water to produce a solution that freezes at -3.68 degrees celsius?
Borane forms complexes with sulfides and amines. Draw a suitable structure to represent the complex formed between BH3 and dimethyl sulfide
What mass of iron is needed to supply the energy required to warm 15ml of water from 23 C to 37 C.
How many grams of potassium nitrate are soluble in 100.0 g of water at 80degrees celcius?
The reaction of alicylic acid with a catalytic amount of sulfuric acid and excess methanol is an example of a fischer esterification. Why was the reaction heated to reflux instead of leaving it at room temp?
A solution of NaOH(aq) contains 7.4 g of NaOH(s) per 100.0 mL of solution. Calculate the pH and the pOH of the solution at 25 °C.
how many grams of ethylene glycol must be added to 700g of water to yield a solution that will freeze at -8.5 degrees Celsius?
A volume of 200mL of nitrogen is collected over water at a temperture of 24 degrees celcius and the atmospheric pressure of 100 kPa. What will be the volume of dry nitrogen at 24 degrees celcius and 125 kPa?
Which of the following statements regarding the possible effects of radiation on a cell is incorrect. Radiation can pass through a cell with no damage.
Calculate the current strength needed to vaporize 12 g of compound X (Mw = 180.16 g/mol and a molar enthalpy of vaporization of 106.4 kJ/mol) in 30 seconds using a 16 volt battery.
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