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Use MO diagrams to place B2+, B2, and B2- in order of decreasing bond energy and decreasing bond length. A) Greatest bond energy Least bond energy B) Greatest Bond Length Least bond length
a light woman and a heavy man jump from an airplance at the same time and open their same-size parachutes at the same time. which person will get to a state of zero accerlation first?
The heat of vaporization of a liquid is the energy required to vaporize 1.00 mol of a liquid at its boiling point. In one experiment, 60.0 g of liquid nitrogen (boiling pt = -196C) is poured into a Styrofoam cup containing 200.0 g of water at 55.3..
A mass of 1.50 g H2O is sealed in an evacuated 3.0-L flask and heated to 55 °C. What mass of liquid water remains in the flask when equilibrium is established? The equilibrium vapor pressure of water at 55 °C is 118 mm Hg.
Propose a structure for a C6H15O2N compound that is unstable in aqueous acid and has the following NMR spectra:1H NMR:
Acetone, the solvent in some nail polish removers, has a density of 0.791 g/mL. What is the volume of 20.4 g of acetone?
What is the molar mass of adrenaline in a solution of 0.64 g of adrenaline in 36.0 g of CCl4 elevates the boiling point by 0.49?
What is the pH of the sodium phosphate buffer described in problem if 1 ml of 10M NaOH is added? What is the pH of 1 liter of water if 1ml of NaOH is added?
For each of the following pairs of compounds, explain the difference in melting point in terms of the intermolecular forces involved. a) hexane (C6H14) m.p. = -96 0C vs. octadecane (C18H38) m.p. = 28 - 30 0C
(One amp-hour is the charge that passes through a circuit when 1 Amp flows for 1 Hour). What mass of Zn is consumed when 35 amp-hours are drawn from the cell?
When they are heated, the final temperature of A is 55 degree C higher than the temperature of B. What does this tell you of the specific heats of A and B
An unknown compound contains only carbon, hydrogen, and oxygen (C x H y O z). Combustion of 5.50g of this compound produced 8.07g of carbon dioxide and 3.30g of water.
Determine if the sample has non-volatile impurities (dissolved in it) b. If found to contain such impurities, determine a suitable method for its purification
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