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A simple cubic unit cell is composed of identical spherical particles with a diameter of 75 pm. What is the volume of the unit cell?
If 4.00 ml of 0.0250 M CuSO4 is diluted to 10.0 ml with pure water what is the molar concentration of the copper (II) sulfate in the diluted solution ?
If 1.0 volumes of 1.0 M solutions of sodium hydroxide and lead (II) nitrate are mized how many moles of product are produced?
Identify the compound(s) that act as acid(s) in the following equilibrium: NH4+ (aq) + CN- (aq) NH3 (aq) + HCN (aq)
When the object is pulled down and released, the band vibrates at a frequency of 2.08 s-1. Calculate the spring constant of this silicone band including units.
What will be the osmotic pressure of a solution when 4.5 x 10-5 mol of a solute is dissolved in 152.0 mL of solution at 300.0 K? R = 0.08206 Latm/molK
Question: You have a prepared buffer solution from benzoic acid, and its conjugate sodium benzoate. Ka = 6.3 x 10^-5 for B.A. If you have 750 mL of a .125M benzoic acid solution and add 19.5 G of so
A student removes the thermometer and stirring wire in part b of the experiment to add the naphthalene, and wipes them off, losing .50 mL of cyclohexane. What percent error will this introduce if th
Calculate the work w when 0.7 litre of an ideal gas at an initial pressure of 4.2 atm is expanded or compressed isothermally to a final volume of 4.2 litres into a vacuum. Give your answers in J.
At equilibrium, [A] = 0.420 M and [C] = 0.580 M. Calculate the value of the equilibrium constant, Kc.
Limestone, CaCo3, when subjected to a temperature of 900 degrees Celsius in a kiln, decomposes to calcium oxide and carbon dioxide.
The molar heat of fusion of benzene is 9.92 kJ/mol. Its molar heat of vaporization is 30.7 kJ/mol. Calculate the heat required to vaporize 7.71 g of benzene at its normal boiling point
The enthalpy change for the reaction of hydrogen gas with fluorine gas to produce hydrogen fluoride is -542 kJ for the equation as written:
A stone is thrown downward with a velocity of 66 feet per secound (45MPH) from a bridge that is 120 feet above the river.
Consider a glass of299 mL of water at30°C. Calculate the mass of ice at -15°C that must be added to cool the water to 10°C after thermal equilibrium is achieved. To find the mass of w
If a temperature increase from 11.0 degrees C to 22.0 degrees C doubles the rate constant for a reaction, what is the value of the activation barrier for the reaction?
When one mole of solid NaOH is dissolved in 1L of solution, 44.5kj of heat are released. How much heat is released when 1.00g of NaOH is dissovled in 100.0mL of water?
Draw the structure of the product of each of these organic reactions: Reaction of Methanol and aqueous Potassium permanganate.
How many grams of water can be cooled from 43'C to 22'C by the evaporation of 60 g of water? The heat of vaporization of water in this temperature range is 2.4 kJ/g.
Are the methyl groups enantiotopic or diastereotopic in the ketone? How about the alcohol?
Consider the location of the amino acid side chains and types of repeating interactions in both an alpha helices and beta sheet. Explain why some amino acids are found more often in one structure t
Denaturation of a protein takes place over a small range of temperature as shown by the heat denaturation curve of ribonuclease A shown in your textbook on p.107. Explain what this tells you about
Determine the osmotic pressure of an aqueous solution containing 250 g of glucose (C6H12O6) in a total volume of 1.0 L solution at 0.0 C.
If 50.0ml of a solution containing 0.01370g of the stretomycin has an osmotic pressure of 8.72mmHg at 23.6 degrees C, what is the molecular weight of the antibiotic?
Calculate the number of grams of urea that must be added to 150 g water to give solution whose vapor pressure is 2.5 mmHg less than that of pure water at 40 degrees C.