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Compare the bond enthalpies of the nitrogen-nitrogen single as well as triple bonds. Based on this information Explain what is the average pi-bond contribution to bond enthalpy in N=N?
Brass is a substitutional alloy consisting of a solution of copper and zinc. A particular sample of red brass consisting of 80.0%Cu and 20.0% Zn by mass has a density of 8780 k/m3. a)What is the molality of in the solid solution
What is the minimium wavelength of light necessary to ionize an atom of sodium? what is the minimum wavelength of light necessary to ionize a mole of sodium atoms?
Enter the symbol of a sodium ion, Na+, followed by the formula of a sulfate ion, SO42-
at 500 degrees celsius cyclopropane rearranges to propene. the reaction if first order and the rate constant is 6.7 x
in a gas mixture the partial pressures are argon 455 neon 80 and nitrogen 175 .what is the total pressure exerted by
What is the concentration of KMnO4 when you mix 2 mL of .160 M KMnO4 with 10 mL of .250 M oxalic acid. Assuming that it took 120 s to observe the color change in the reaction, what is the rate of the reaction
At a certain temperature, a volume of 100 mL of saturated barium carbonate solution contains 0.00216 g of BaCO3 (MW=197.3 g/mol).
Write a balanced thermochemical equation for the reaction with an energy term in kJ as part of the equation.
For the reaction 2CH2O(g) + O2(g) ? 2HCOOH(l), if 4.19 × 1022 molecules of formaldehyde (CH2O) react with excess oxygen, what is the theoretical yield of formic acid (HCOOH)
The piece of iron with a mass 102.9g was submerged in a graduated cylinder filled with water. The initial level of water was 20.0 ml. The density of iron is 7.86 g/ml.
Write lewis structures for each of the following species. Use expanded octects as necessary.
Three solutions 61.0 mL of 0.2 M KNO3; 63.0 mL of 0.3 M Ca(NO3)2; and 69.0 mL of 0.385 M KCl were poured together to make one new solution.
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