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Resonance of a Pentadienyl Radical
The pentadienyl radical, CH2=CH-CH=CH-CH2, has its unpaired electrons delocalized over three carbon atoms. Use resonance structures to show which three carbon atoms bear the unpaired electron.
The vapor pressure of br2(l) at 25C is 228 mm hg. if 2.00g of br2 is usedm what is the final pressure in the flask? will there be liquid in the flask.
A solution is prepared by dissolving 270 g of sucrose (C12H22O11) in 624 g of water. What is the vapor pressure of this solution at 30°C? (The vapor pressure of water is 31.8 mmHg at 30°C.)
Calcium carbide, CaC2, reacts with water to form acetylene. CaC2(s) + 2 H2O(l) C2H2(g) + Ca(OH)2(s) How many grams of water are needed to react with 473 g of calcium carbide?
A sample of gas confined in a 2.0L container at 930 Torr and 25oC was heated to 45oC. What was the final pressure?
What would the change in temperature be in each change if 1 mole of an ideal gas is subjected to numerous changes in state, C= 12.47 J/Kmol.?
Derive the expression for the energy of a molecule, Consider the system of a gas adsorbed onto a surface. The gas can be treated as a two-dimensional ideal gas
Europium crystallizes in a body-centered cubic lattice (the Eu atoms occupy only the lattice points).The density of Eu is 5.26 g/cm3. Calculate the unit cell edge length in pm.
calculate the difference in mass that is hold by a 500.0mL flask at a temperature of 0.0°C from that at temperature of 20.0 °C? (you can assume the volume of the sample at 0.0 °C temperature =volume of the sample at 20.0°C)
Determine the second order rate constant from the initial concentration and half life and what is the second order rate constant?
Calculate the pH of a solution made by adding 77 g of sodium acetate, NaCH3COO, to 24 g of acetic acid, CH3COOH, and dissolving in water to make 700. mL of solution.
Compute the enthalpy change for this reaction per mole of this substance and dissolves via the reaction and the temperature of the solution rises to twenty eight degree celsius.
the preparation of the esters given in this reaction, the reaction product is extracted with 5% sodium bicarbonate solution (NaHCO3) in the isolation step
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