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Suppose .050 moles of a substance reacts in 25.0 grams of water. If the water temperature goes from 22 degrees C to 26 degrees C, how much heat was given off? How much heat would be given off if one mole of the substance reacted?
The substitution reaction of H2S-BH3 with NH3, which generates 2 product molecules, assuming that no species exceeds the octet rule. Given the following information:
Calculate the volume of 1.00 M nitric acid needed to react completely with 25.0mL of 1.84 M calcium hydroxide
for the reaction 2a b --gt 2c if b is initially 4.0m and 2min later is 3.0m what is the rate of appearance of
Spica has a surface temperture of 23kK (2.3 x 10^4 K). At what wavelength does Spica emit the maximum intensity of light?
The accepted toxic dose of mercury is 300ug/day (micrograms per day). Dental offices sometimes contain as much as 180ug of mercury per cubic meter of air. If a nurse working in the office ingests
What is the hybridization or what atomic orbitals are used by nitrogen in ammonia?
Why is ethylene glycol used as the solvent for the dehydrohalogenation of of 1,2-dibromo-1,2-diphenylethane
The dissociation constant (Kd) for the complex is 4.00E-7. Find the absorbance at 550 nm of a solution prepared by mixing 50.0 ml of 2.00 mM A and 50.0 ml of 5.00 mM B. assume the absorbance is measured with a 1.00 cm cuvette.
Write both an equation using Lewis structures and a balanced chemical equation for the following reactions. Silicon atoms and chlorine molecules.
What is the equilibrium constant Kc for the reaction below. Assume temperature is 25oC. (Hint, Represent the reaction below as a sum of reactions and then combine the corresponding K values to obtain Kc for the reaction below.) HF(aq) +NH3(aq) N..
What is the molarity of an unknown acid if 40.5 ml of the acid can be titrated
You mix 1.0 mL of 0.50 M Cu(NO3)2 with 6.0 mL of 0.05 M KI, and collect the dry CuI precipitate. What mass of CuI do you expect to obtain from this reaction
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