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Find the frequency in Hz of the photon emitted by an atom (not hydrogen) that undergoes an electronic transition from an excited state at energy -4.711x10-19 J to the ground state at energy -8.71x10-18 J.
Identify the largest heat of combustion, small heat of combustion and highest boiling point for: heptane(i), 3-methylhexane(ii), nonane(iii)
Describe the 3 dimensional shape of the central atoms of sugar using VSEPR. Include the bond angles.
pure benzene c6h6 freezes at 5.533 celsius. if a solution containing 10.86 g of c2h2cl4 in 172.5 g of benzene freezes
Write the net ionic equation to show the formation of a precipitate (insoluble salt) when the following solutions are mixed. write none if there is not a precipitate. a)Ca(NO3)2(aq) and Na2S(aq). b)Na3PO(aq) and Pb(NO3)2(aq). c)FeCl3(aq) and NH4NO..
Givens: mass NaCl = 4.01689, mass water = 99.7g, boiling point of pure water = 99.70 C, boiling temp. of solution = 100.4 C. Calculate the predicted change in boiling point in C
A calorimeter contains 27.0 g of water at 11.0 C. When 2.10 g of X (a substance with a molar mass of 80.0 g) is added, it dissolves via the reaction
Predict the physical state of ammonia at -95 degrees C (mp =-77degrees C, Bp =-33 degrees C) and normal atmospheric pressure.
Do the pH values for the more dilute solutions approach the pH of the distilled water. What would we expect to happen if we continued to dilute these samples even further
A 1- L flask is filled with 1.40 g of argon at 25?. A sample of ethane vapor is added to the same flask until the total pressure is 1.05 atm.
Established in a container of 1.0 Litre at a temperature of 1,000 K, where K c = 4.0 ⋅ 10NH 3 (g) are present. Calculate What is the equilibrium concentration of H 2 (g).?
Question- Draw the structures of the acid form of naproxen and its sodium salt as well. Draw the structures of the acid form of ibuprofen and its deprotonated form as well.
When the activation energy is 25.2 kJ mol-1, what is the rate constant (in s-1) at a temperature of 52.4 °C?
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