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a 2.81 g lead weight, initially at 10.3 degrees C, is submerged in 7.81g of water at 52.5 degrees C in an insulated container. what is the final temperature of both substances at thermal equilibrium.
what the oxidation state P in PO4^-2? what the oxidation state O in PO4^-2?
The sudden opening of the epiglottis and vocal cords releases this air explosively. Just prior to this release, what is the approximate pressure of the gas inside the lungs?
Based on the Hume-Rothery Rules, speculate on the possible driving forces behind the tendency for ordering in this system.
Based upon your answer to Part a, do you think a significant amount of salt would form from mixing quimolar amounts of benzoic acid and 4-nitroaniline? Explain your reasoning.
The enthalpy change for the reaction of hydrogen gas with flourine gas to produce hydrogen flouride is -542kJ fo the equation as written H2+F2=2HF deltaH=-542kJ
draw structural formula for protien synthesis by the sugar arrangement using AATCGTATGG
A quantity of ice at 0°C is added to 66.4 g of water in a glass at 55°C. After the ice melted, the temperature of the water in the glass was 15°C. How much ice was added? The heat of fusion of water is 6.01 kJ/mol and the specific heat is 4.18 J/(..
One of the sodium oxoacid salts of chlorine (there are 4 salts, each containing Na, Cl, and O) was analyzed. A 17.00 g sample was found to contain 3.68 g Na and 5.67 g Cl.
if 50L of Argon and Helium are mixed at STP then What is the ratio of molecules of Argon to molecules of Helium in the gaseous mixture?
55.0 mL of a 1.70 M solution is diluted to a volume of 278 mL. A 139 mL portion of that solution is diluted using 175 mL of water. What is the final concentration.
What is the molarity of a solution produced by dissolving 31 g of Cu(NO3)2 in a 100 mL volumetric flask?(Enter unit as M.)
calculate the ph of buffer solution made from .20 M HC2H3O2 and .050 M C2H3O2 that has an acid dissociation constant for HC2H3O2 of 1.8*10-5.
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