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In metallic magnesium explain what fraction of the 'molecular orbits' contained in the valence band plus the conduction band is occupied by electrons? Explain
How many grams of sucralose would you need for a solution that has the same sweetness as one made with 2.00g of sugar? Please show how to solve problem
A single pulse of a laser yields an average of 5.00 multiplied by 1018 photons with = 633 nm. If melting ice to water at 0°C requires 6.01 kJ/mol, what is the fewest number of laser pulses need to melt 10.0 g of ice?
The air in an inflated balloon (defined as the system) is warmed over a toaster and absorbs 130J of heat. As it expands, it does 76kJ of work. What is the change in internal energy for the system?
If the heat of fusion os X is 80.0 J/g, the heat of vaporization is 190.J/g, and if 3.5 J are required to warm 1 g of X each degree, how much energy will be needed to accomplish the change in a
A cylindrical glass tube 15.0 cm in liength is filled with ethanol. The mass of ethanol needed to fill the tube is found to be 9.64g.
a quantity of electricity equal to 9.263 x 104 c passes through a galvanic cell that has an nis anode. compute the
Why is anhydrous sodium sulfate added to the organic solution remaining after the extractions with 6M NaOH
The equilibrium contant Kc for the reaction HF(aq)+H20(l)-->H30+(aq)+F-(aq) is 3.5x10^-4. What is the equilibrium concentraction of H30+ if the initial concentration of HF is 1.0M
a piece of sodium metal reacts completely with water as follows.2 nas 2 h2ol -gt 2 naohaq h2gthe hydrogen gas
if 0.00484 mol N2O effuses through an orifice in a certain period of time, how much NO2 would effuse in the same time under the same conditions ?
The aqueous electrolytic solution (d= 1.230 g/cm^3) in a typical automotive battery contains approximately 368 g of hydrogen sulfate (H2SO4, sulfuric acid, MM= 98.07948 g/mol) per liter. Calculate the following concentrations
Calculate the change in internal energy of the following system: a balloon is cooled by removing 0.657 kJ of heat. It shrinks on cooling, and the atmosphere does 384J work on the balloon.
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