Friday
December 6, 2013

# Posts by GK

Total # Posts: 644

chemistry

Chemistry
Freq. = 2.40 GHz = 2.40x10^9 waves/second velocity of light = (wavelength)(frequency) Wavelength = (velocity of light) / (frequency) Wavelength = (3.00x10^8 m/s) / (2.40x10^9waves/sec) = ______________ m/wave ---------------- NOTE: "Light" is used in the sense of rad...

Chemistry
Convert frequency from MHz to Hz. wavelength = (3.00x10^8m/s) / (frequency in Hz)

Chemistry
Intermolecular forces in a solid (lard) are stronger than intermolecular forces in a liquid (oil). The intermolecular forces in saturated fatty acids which are the main components of solid fats are stronger than those in unsaturated fatty acids which are more common in oils. S...

Chemistry
Esterification = Reaction of an organic acid with an alcohol to form an ester and water. Saponification = Reaction of a basic (NaOH) solution with an ester to form a salt of the organic acid and the alcohol in the ester. The acid in the ester is pulled out as a salt (soap) alo...

chemistry
Yes, if the the molecule is symmetrical enough for the bond dipoles to cancel out. Example: O=C=O has polar bonds but their dipoles cancel out because of molecular symmetry.

organic chemistry
The ideal solvent for recrystallization is one in which the solute has high solubility at high temperature and low solubility at low temperature. You could try to look up solubilities in chemistry handbooks or experiment with different solvents. If you have to do that you migh...

Chemistry 130
pH = -log[H+] The above relationship can also be expressed as: [H+] = 10^(-pH) or [H+] = 1 / 10^(pH) That shows the hydrogen ion concentration is inversely proportional to the pH.

Chemistry
The correct answer is (a) based on the first chemical equation below. The mole ratio of NaOH to H3PO4 determines which salt is produced. Only the first one produces Na3PO4: H3PO4 + 3NaOH ---> Na3PO4 + 3H2O H3PO4 + 2NaOH ---> Na2HPO4 + 2H2O H3PO4 + NaOH ---> NaH2PO4 + ...

CHEMISTRY
It could be an alkene as DrBob indicated or an ether depending on experimental conditions such as temperature.

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