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Explain how many calories are required to heat 256g of water from 20C -99C? Explain how many calories are required to heat the same mass of iron through the same range temperature?
A compound contains only C, H, N and O . Combustion of a 1.48g sample in excess oxygen yields 2.60g of CO2 as well as 0.799g ofH2O. A separate experiment shows that a 2.43gsample contains 0.340g of N. Explain what is the empirical (simplest) formu..
The first ionization energy of bismuth is +703 kJ/mol. What is the longest possible wavelength of light that could ionize an atom of bismuth
The standard enthalpy of formation of n-octane is -249.95 kJ/mol. Compute the amount of heat liberated when 3.58 g of n-octane is burned completely with excess oxygen to form carbon dioxide and liquid water.
A certain first order reaction has a rate constant of 0.0215 s-1 at 24 degrees C. What is the value of rate constant at 70 degrees C if Ea=90.0 kJ/mol.
Use the balanced equation to calculate how many mL of 0.15M KOH solution will be needed to completely react with 15.0 mL of a 0.20M H2SO4 solution
What relationship exists between H+ ion concentration and OH- ion concentration? What is the OH- concentration in an aqueous solution where the H+
The Atomic Mass of carbon is found to be 12.011 amu. A Molecular Mass is the sum of the (averaged) Atomic Masses for all atoms in a molecule. What is the Molecular Mass of H2SeO3
Draw the structure of the two tertiary (3°) alcohols with the molecular formula C7H16O that contain a one-carbon branch
electrode composed of nickel in a 1.0 M nickel(II) ion solution and another electrode composed of silver in a 1.0 M silver ion solution, connected by a salt bridge. Calculate the standard potential for this cell at 25 °C.
what is the structure os glycylserine and
What is the difference between an Indicator electrode and a Reference electrode in a potentiometric titration
What volume of a 15.0% by mass NaOH solution, which has a density of 1.116 g/mL, should be used to make 5.40 L of an NaOH solution with a pH of 10.0
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