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A set of bookshelves rests on a hard floor surface on four legs, each having a cross-sectional dimension of 3.0 X 4.1 cm in contact with the floor. The total mass of the shelves plus the books stacked on them is 262 kg. Calculate the pressure in pascals exerted by the shelf footings on the surface.
If you'd measure the conduction of NaCl(s) og NaCl (l), how would their conduction be in comparison to the conduction of 0,9% NaCl (aq) solution. And why
Use the Nernst equation to calculate the Cd2+ concentration when given cell potential of +0.768V and Mn2+ concentration of .500M
Determine the final temperature of the system if a 325 g block of Al (Cs=0.903 J/g degree C) initially at 85 degree C is dropped into 325 g of water initially at 15.0 degree C.
Based on a kc value of 0.210 and the given data table, what are the equilibrium concentrations of xy,x and ,y respectively
The kidneys filter blood plasma across a specialized structure, called the glomerulus, that is permeable to small molecules (water, salts, glucose, etc.) but not to proteins.
A student creates a coffee cup calorimeter for lab. The coffee cup contains 30 mL of water at a temperature of 55.5 °F. He then adds 65.4mL of water, at 165.5 °F, into the coffee cup. The final temperature of the coffee cup is 120.3 °F.
Draw the product of the following reaction between propanoyl chloride and p-methoxynitrobenzene. Include all formal charges.
A rigid cylinder with a movable piston contains a 2.0-liter sample of neon gas at STP. What is the volume of this sample when its temperature is increased to 30.°C while its pressure is decreased to 90. kilopascals.
Suppose that the atomic mass unit (amu) had been defined as one-sixth of the average mass of an atom of sodium instead of one-twelfth of the mass of an atom of carbon-12. What would the average atomic mass of magnesium be on this new scale
Calculate the Standard Enthalpies & Standard Entropies for each reactant & product at the temperature given first, then determine the ?H°rxn and ?S°rxn at 1600 K Zr(beta) + O2 = ZrO2(beta) Other information:
Compare the energy of a photon of wavelength 3.4 um with that of wavelength 0.155 nm. answer is in E1/E2
A nurse requires to prepare 125.0mL of normal saline to dissolve drugs that are to be administered IV. Normal saline is 0.92% (m/v) NaCl. Explain how many grams of NaCl will the nurse need
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