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A chemistry student prepares acetone by decomposing 12.3 g of calcium acetate. If the student collected 2.50 g of acetone and the theoretical yield is 3.42 g, what is the percent yield?
What is the molarity of a sodium chloride solution if 2.45 grams of NaCl is dissolved in 250 mLs of water? C. How many grams of solute are in 1.75 Liters of 0.460 M sodium monohydrogen phosphate
write the equation showing the S-trans to S-cis equilibrium of the two conformations for a. (E)-1,3-pentadiene b. (Z)-1,3-pentadiene
A sample of air contains 78.08% nitrogen, 20.94% oxygen, 0.05% carbon dioxide, and 0.930% argon by volume. How many molecules of each gas are present in 1.00 L of the sample at 31 degrees C and 1.00 atm?
Calculate the wavelength of light that is produced when the excited electron relaxes back tro ground state. givien sodium is the excited element
A 129-mL portion of that solution is diluted by adding 121 mL of water. What is the final concentration? Assume the volumes are additive.
A pressure cooker can be used to cook foods quickly under high pressure. The temperature inside a pressure cooker is 116 degrees celsius. Calculate the vapor pressure of water inside the pressure cooker.
in discussing solar-thermal so far weve mostly focused on the large central-station power plants that generate
If a contemporary wooden chair were somehow preserved to for the next 3,900 years, what C-14 dacay rate should be expected from the wood used to make the chair? (t1/2 = 5730)
How should the two heats of reactions for the neutralization of NaOH and the two acids compare? Why?
Formation of SO3 from the air pollutant SO2 is a key step in the formation of acid rain, according to the following reaction. Use standard enthalpies of formation from Appendix L to calculate the enthalpy change for the reaction.
Oxalic acid is a diprotic acid that occurs naturally in some plants. Calculate the pH and the concentrations of all species present in a 0.72-M solution
explain the difference in boiling point between the isomers 1-chlorobutane and 2-methyl-2-chloropropane in terms of structure.
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