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The predominant intermolecular forces in hydrocarbons are dispersion forces. There are two factors that increase the dispersion forces between molecules:
Molecule size: The larger the electron cloud around the molecule, the greater the dispersion forces. The length of the carbon chain among similarly branched hydrocarbons can be used to assess this factor.
Molecule shape: Molecules that can align easily will have stronger dispersion forces. The linearity of the molecule among similarly branched hydrocarbons can be used to assess this factor.
Note that the size of the molecule has a much greater affect on the dispersion forces than the shape of a molecule.
Arrange the following hydrocarbons in order of decreasing melting point.ethanebutanetrans-2-butene2-butynecis-2-butene
How do you know if there should be a precipitate or not. What is the chemical formula for the possible precipitate. Look in your textbook for any necessary equilibrium constants.
If the barometeric pressure was 0.98 atm when the mercury level in an open-end manometer connected to a flask of gas was 177 mmHg higher on the side open to the atmosphere than on the flask side
Oleum or fuming sulfuric acid availble commerically in concentrations ranging from 20 to 99% sulfur trioxide. 1. What is the percentage by mass of sulfer trioxide (SO3)
four ice cubes at exactly 0 degrees c having a total mass of 55.0 g are combined with 120 g of water at 76 degrees c in
Consider the titration of 30.0 ml of 0.025 M NH3 with 0.020 M HCl. Calculate the pH after the following volumes of titrant have been added.
In an atom, how many electrons can have the quantum number designations n=3, ml=0, ms=1/2
The overall formation constant for Cu(NH3)42+ is 1.1x1013 at 25oC. What is [Cu2+], in moles per litre, at equilibrium when 8.3 g Cu(NO3)2 is dissolved in 0.500 L of 1.00 mol/L NH3(aq)? Assume that there is no volume change when the Cu(NO3)2 is add..
Heat is now added until the water reaches a saturated vapor state. Find the initial volume, final pressure, work, and heat transfer. Any help would be appreciated, thanks in advance.
A student constructs a coffee cup colrimeter and places 50 ml of water into it. After a brief period of stabilization, the temp of the water in the calorimeter is 23.5 celsius
The vapor pressure of ethanol at 34.7 degrees Celsius is 100mmgh, and the heat of vaporization of ehanol is 38.6 kj/ mol. What is the vapor pressure of ethanol in mm Hg at 65.0 degree celcius
Dissolving NH4Cl(s) in water is endothermic with a heat of the solution of 15.2 kJ/mol. If a 6.134 g sample of NH4Cl is added to 65.0 mL of water in a calorimeter at 24.5°C, what is the minimum temperature reached by the solution
Solution is prepared by mixing 0.025 l of 3e-3 m BaCl2 and 0.025l of 2e-3 m of na2co3. Ksp= 2.6e-9 for baco3. Write balanced equation with correct state
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