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A plane wall is constructed of a material having a thermal conductivity that varies with the square of the temperature according to the relation k=k0(1+βT2). Derive an expression for the heat transfer in such a wall.
Hydrogen atoms that are bonded to an sp3 hybridized carbon atom normally appear between 0.9 - 1.8 ppm and are said to be shielded. What would cause the hydrogen atoms bonded to an sp3 hybridized carbon atom to be deshielded and appear downfield
Based on the value obtained in the three heating above, do you think the student should have confidence in his results? why? what do you think he should do to be more confident in his result
A 255-mL sample of HCl solution reacts with excess Mg to produce 14.0 L H2 gas at STP. What is the molarity of the HCl solution?
Draw the Lewis structure of nitramide with a single bond between the two nitrogen atoms and include formal charges. Are there any resonance structures? If so, please draw these too. Describe the hybridization of the nitrogen atoms.
In a manometer the mercury level at the open end of the tube is 215 mm higher than at the closed end of the tube. If the atmospheric pressure is 1 atm.
A patient needs 2.80×10-2 of a sulfa drug. There are 8.00 tablets in stock. How many tablets should be given?
Calculate the molar solubility of Mn(OH)2 in moles/L and in g/L. What would happen to the solubility of Mn(OH)2 when 0.02 M NaOH is added to the solution. Calculate the new solubility after the addition of NaOH.
A child discovered that her coin is missing and there is a hole in her pocket. She turned back and walked 24m east along the sidewalk. Then, she stopped for 18s and decided to head back to school.
An aqueous solution has a vapor pressure of 82.6 at 50 . The vapor pressure of pure water at this temperature is 92.6. What is the concentration of in mass percent
What pH is required to start precipitation of Fe(OH)3 from a 0.110 M solution of FeCl3? Ksp of Fe(OH)3 = 4.0 10-29.
The oxalate in the compound was found by KMnO4 titration to constitute 54.81% of its mass. Molar mass of C2O4 is 88.0193 g/mol
calcuate the number of moles of HCI and of NaOH present when mixing 50.0mL
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