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The product of the final step in the synthesis below are acetone and acetaldehyde. What are the identities of compounds A and B?
A. C5H12O
(React with concentrated sulfuric acid)
B. C5H10
(React with ozone in the prescence of zinc)
CH3COCH3 + CH3CHO
A is allowed to come in contact with substance B. B has a mass of 46.28 grams and its initial temperature is 86.5oC. These two substances reach thermal equilibrium at a temperature of 64.2oC. If the specific heat capacity of substance B is 1.17 J/..
A buffer contains 0.30 M acetic acid and 0.20 M sodium acetate. What is the pH of the buffer as prepared and after 0.030 mol/L of a strong acid or 0.030 mol/L of a strong base are added (Ka = 1.8 x 10-5).
What is the ratio of the conjugate base concentration to the acid concentration, that is, [B-]/[HB] when the indicator switches to the acidic color?
A tank contains N2 at 1.0 atm and O2 at 2.0 atm. Helium is added to this tank until the total pressure is 6.0 atm. What is the partial pressure of the helium?
for the reaction N2O4 (g) 2 NO2 (g) a 0.750 L flask contains an equilibrium mixture of 0.971 mol N2O4 and 0.0580 mol NO2 at 25 C. The system is allowed to expand into a larger flask with a total volume of 3.0 L.
130 mL of an HCl solution with pH of 3.90 is added to 200 mL of an HNO3 solution. The resulting solution is 1.40 mL. What was the pH of the original HNO3 solution?
Which of the following is not true regarding social development?
A compound contains only nitrogen and hydrogen and is 87.4% nitrogen by mass. A gaseous sample of the compound has a density of 0.925 g/L at 690 torr and 110 C.
A sample of H½O with a mass of 46.0 grams has a temperature of -58.0 àC. How many joules of energy are necessary to heat the steam from 100.0 àC to 114.0 àC if the specific heat of steam is 2.01 J/g àC?
structures of all cycloalkenes that yield n-propyl cyclopentane when subjected to catalytic hydrogenation
Determine the end (final) value of n in a hydrogen atom transition, if the electron starts in n = 4 and the atom emits a photon of light with a wavelength of 486 nm.
discuss how the shielding by core electrons is analogous to putting a frosted-glass lampshade between the lightbulb and your eyes.
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