6. Why does CO2 have a much lower boiling point than NO2? CO2 is a linear molecule, and is not polar, and therefore experiences only dispersion forces with other CO2 molecules. NO2 is bent and polar, and therefore interacts with other NO2 molecules via a relatively strong dipole-dipole force. This means that it will require more thermal energy to break free from these intermolecular forces, i.e.
Southside Seaweed Seaport Iodine: Atomic Number: 53 Atomic Mass: 126.90447 Boiling Point: 457.4 K (184.3 °C, 363.7 °F) Focus: Did we indeed make a “tincture of iodine”? Answer: Yes, our lab experiment did indeed prove that we make a “tincture of iodine”. Test Standard (+/-) Comments Lab-Made Tincture (+/-) Comments Test for Iodine (I2) + purple layer formed + turned purple shade Test for Iodide (I-) + yellow precipitate + white-yellow precipitate Test for Triiodide (I3-) + orange/red coloration + orange/red coloration table 1.0 Confidence Report: 1. Matching the Standard Ran three tests against our home-made “tincture of iodine” versus the standard “tincture of iodine”. Each test (for Iodine (I2), for Iodide (I-), and for Triiodide (I3-)) match the standard for each reactant (I2, I-, I3-).
The bulbs create less heat during use, which can lead to lower cooling costs and its green friendly, decreases amount of energy used by 5%. Laser Transmitter Laser transmitter have a much smaller and tighter light input and can be easily coupled to single mode fibers, this makes the laser transmitter perfect for longer distances and high speed links. Laser has a high bandwidth capability some are used up to 10GHz or 10Gbps this makes Laser transmitters more expensive. Laser Transmitters have a narrow spectral output that suffers very little chromatic dispersion. Laser Transmitters avoid interference because the frequencies between the lasers have narrow beams that are less likely to have significant side lobes that could introduce interference.
The indicator Phenolphthalein was the substance used to signal when the titration reached the point at which the reactants are stoichiometrically equal as defined by the balance reaction equation. Phenolphthalein is a chemical compound with the formula C₂₀H₁₄O₄ and is often written as "HIn" or "phph" in shorthand notation. Often used in titrations, it turns colorless in acidic solutions and pink in basic solutions. Sodium hydroxide or Hydrochloric acid would not have been as effective or accurate because they would have reacted with the water vapor from the air. In this lab setup, graduated cylinders or beakers were not used.
The polar absorbent material in the column separated the different pigments by allowing the least polar molecules to travel through the column faster than the more polar molecules. The different pigment layers were collected, dried, and their weights were recorded. ß-carotene was the least polar molecule, and it traveled through the column faster than the chlorophylls. Chlorophyll-A was next to travel through the column followed by chlorophyll-B. Because chlorophyll-A is more polar than ß-carotene and less polar than chlorophyll-B, this observation is reasonable.
The more hydrogen bonds there is, the more stable the nucleotides are. Greater bond stability requires more heat energy to separate the bonds, and since G=C have more hydrogen bonds than A=T, they are consequently more stable under increasing heat. 3. Which of the following is not an organic molecule; Methane (CH4), Fructose (C6H12O6), Ethanol (C6H12O), or Ammonia (NH3)? How do you know?
As the solvent moves up the paper, it carries along any substances dissolved in it, which are the pigments. The heavier the pigments the slower they move and they do not travel as far. Going in order from the heaviest to the lightest: Chlorophyll b, Chlorophyll a, Xanthophylls, and Carotene, which means that the lighter the pigment the better the substance is in dissolving in solvents. Photosynthesis
Rachel Cranny February 24, 2012 Partner: Megan Jones Separating Mixtures Lab Purpose: The purpose of this lab report was to separate the mixture of sand, salt, and iron filings. Introduction: Matter is made up of pure substances and mixtures. The way to determine if something is a mixture or pure substance is by looking at the particles in the substance. If all of the particles present are identical, it is a pure substance, but if all of the particles are different, it is a mixture. A pure substance can either be an element or a compound, and they are made of the same type of atoms or molecules.