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What is the difference between DH and DE, and why are standard heats of formation for elements in their most stable form assigned a value of " 0 " ?
Silver metal crystallizes in a cubic closest packed structure. The face centered cubic unit cell edge is 409 pm. Calculate the density of the silver metal.
Draw a six carbon alkyne that can exist as diastereomers. The molecule should only contain only carbon
Ethylene, C2H4, and water react under appropriate conditions to give ethanol. The reaction is C2H4(g) + H2O(g) C2H5OH(g) An equilibrium mixture of these gases at a certain temperature
ethanol c2h5oh melts at -114degc. the enthalpy of fusion is 5.02 kjmol. the specific heats of solid and liquid ethanol
What is the total linear interaction coefficient (macroscopic cross section) for a thermal neutron in the natural uranium? What is the total macroscopic fission cross section for thermal neutrons
Determine the flow rate of water, in kg/s, that can be cooled if the cooled water is not recycled. The water enters the tower at 40 C and leaves the tower at 25 C.
It is given given that pure acetic acid, known as glacial acetic acid, is a liquid with a density of 1.049 g/mL at 25 degrees C. Calculate the molarity of a solution of acetic acid made by dissolving 29.00 mL of glacial acetic acid
Question- Calculate E cell at 25 degrees C when (Cr2O7^2-) = 2.5*10^-4, H+ = 1.2 M, Cr3+ = 5.2*10^-4 M and I- = 1.0 M
A mixture of ammonium chloride and sand is placed in an evaporating dish and massed at 56.246g. The mixture is heated, driving off the ammonium chloride and massed again
Determine the molar mass of carbon dioxide by measuring the mass of an Erlenmeyer flask full of the gas. The following calculations are intended to familiarize you with the general procedure:
A solution is made by mixing 45.0mL of ethanol, C2H6O, and 55.0mL of water. Presuming ideal behavior what is the vapor pressure of the solution at 20 °C
al3 is reduced to als at an electrode. if a current of 2.00 ampere is passed for 48 hours what mass of aluminum is
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