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The activation energy for the reaction O + O3 ? 2O2 is 25 kJ/mol, and the enthalpy change is ?H = -388 kJ/mol. What is the activation energy for the decomposition of O2 by the reverse reaction
The pressure of 9.0 L of an ideal gas in a flexible container is decreased to one-eighth of its original pressure, and its absolute temperature is decreased to one-forth of the original. What is the final volume of the gas?
A portion of soup containing 235 g water is heated in a microwave oven from 23°C to 85°C, with radiation of wavelength 1.55 multiplied by 10-2 m. How many photons are absorbed by the water in the soup
Draw the Lewis structure for each including formal charges and describe in paragraph format how you went about solving the problem and making sure the answer was correct.
you have an unknown which may or may not be a hydrocarbon. it gives a negative test with br2chcl3 but decolorizes
a fluorinated organic gas in a cylinder is compressed from an initial volume of 960 ml at 158 pa to 478 ml at the same
What dansylated amino acids would be isolated after reaction of S-F-H-Y-W-C-T-L-C-K-L-I-N-D-S with dansyl chloride an the complete with hydrolysis
To prepare a fertilizer, an engineer dilutes a stock solution of sulfuric acid by adding 23.0 L of 4.75 M acid to enough water to make 500. L. What is the mass of sulfuric acid per milliliter of the diluted solution
Draw all products of the reactions of 4-Chloro-2-methylpentane with NaCN and AgCN. Identify the reaction mechanisms and draw resonance structures
A prominent state hospital, a 45-year-old woman is receiving a 'combined modality' treatment for the initial stage of breast cancer. State the two aspects included in this treatment. State the methods by which a radiation oncologist can admisniste..
Explain how to prepare 500.0 mL of an 8.00% v/v methyl alcohol solution. * measure out 40.0 mL of methyl alcohol * measure out 4.0 mL of methyl alcohol
A particular balloon can be stretched to a maximum surface area of 1257 cm2. The balloon is filled with 3.2L of helium gas at a pressure of 763 torr and a temperature of 291K. The balloon is then allowed to rise in the atmosphere
A compound found in coal dust has a percent composition by mass of 94.08 % C and 5.92 % H and a molar mass of 153.203 g/mol. What is the compound
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