The lab started off by measuring critical materials for the lab: the mass of an an empty 100 mL beaker, mass of beaker and copper chloride together(52.30 g), and the mass of three iron nails(2.73 g). The goal of this experiment is to determine the number of moles of copper and iron that would be produced in the reaction of iron and copper(II) chloride, the ratio of moles of iron to moles of copper, and the percent yield of copper produced. 2.00 grams of copper(II) chloride was added in the beaker to mix with 15 mL of distilled water. Then, three dry nails are placed in the copper(II) chloride solution for approximately 25 minutes. The three nails have to be scraped clean by sandpaper to make the surface of the nail shiny; if the nails are not clean, then some unknown substances might accidentally mix into the reaction and cause variations of the result.
Kaydyn Dillbeck IDLA Physical Science 10/26/14 Questions for U4A1 Section 1: 1. Kinetic molecular theory- used to explain the behavior of gases and is based upon the following postulates: • Gases are composed of a many particles that behave like hard spherical objects in a state of constant, random motion. • These particles move in a straight line until they collide with another particle or the walls of the container.
Doriana Spurrell What different frequencies and types of light would prompt the Spinach leaves to go through the process of photosynthesis effectively? Purpose: The purpose of this experiment was to see which of the four lights that range across the light spectrum would properly and most efficiently help the spinach leaf perform photosynthesis. Background Information: Photosynthesis is the process in which plants use light energy to transform into chemical energy.
In the above hypotheses, the research done previous to the lab supported the alternate hypotheses for the colored lights in relation to the dim lights, and the null hypothesis for the experiment in which both sides of the chamber had dim light. The dim light on Side B of the chamber would be favored because, in a previous study, D. Melanogaster were exposed to different illuminations, and “their favorite resting, grooming, and feeding places were determined with an infrared-sensitive camera.” Additionally, the study used infrared beams to collect data on the activity levels of the flies during their most active period of the day under different light intensities. Each of these methods demonstrated D. Melanogaster’s preference for dim light occurring “between 5 and 10 Lux” (Rieger et al.).
Practice Final Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) What is the longest wavelength in the Lyman Series? A) 91.20 nm B) 365 nm C) 45.60
The colors that were brightly emitted in the spectroscope were the colors violet, blue, yellow, and green. Then, the spectroscope readings from part one were taken and plugged into the equation to get wavelengths of: violet-436, blue-485, green-534, and yellow-583. Compared to the actual accepted wavelengths, the percent errors were relatively high: violet-6.34%, blue-11.98%, green-10.08%, and yellow-11.13%. These wavelengths were used to calculate the energy emitted and the thus the initial energy levels could be determined. When a photon is absorbed by a hydrogen atom, the energy from the photon causes the electron to move from one energy level to another, whereas if a photon is emitted, the electron transitions from a high energy level to a low one.
Everyone tries to escape reality in their own way. Some choose to read books. Others choose to listen to music. Escape can be different for everyone, but we can live through experiences that are not our own. In Hanif Abdurraqib’s essay “Under Half-Lit Fluorescents: The Wonder Years and the Great Suburban Narrative” he discusses the world we live in and the escape people seek everyday.
These samples were then compared to the spectra of the unknown sample, or Figure A. The sample spectra are all included in the Figure A. The IR spectra of the unknown sample. This can also be referred to as Spectra H. appendix section of this lab report and
Glow This tool adds glow auras on the picture. The effect finds the brightest are on the image and adds it bright halos. So it turns out that the brightest area shines. This effect is used to mitigate the general form of picture as well as to give it a "romantic" view or create a fog effect.
Contrarily to bottle C, Bottle A had the longest wavelength and smallest frequency because there was a seventeen-centimeter air column for the waves to reflect back and forth. Secondly, the
From the spectroscope, we could the see different clearer clusters of spectra from various sources of light and elements. These instruments allow you to look at forms of visible light. Describe an experience that told you there were other forms of radiation that affect us which we are not able to observe directly. From the infrared selfie, we could see other forms
They are similar in that they only express certain wavelengths of color, and that color must be within the visible spectrum. ● How would you use the idea of quantization of energy to explain the nature of these spectra? When energy in quantized, there are specific lines that occur at specific energy levels as electrons move up and down specific quanta. Energy is not continuous, like a slope, but rather more
Dual Wave-Particle Nature Light Describe what is meant by the dual wave-particle nature of light The dual nature of light refers to the fact that light can act as both a wave and a particle In his experiment, Young shone light between two parallel slits, causing the light waves to interfere with each other and form a patter of dark and light bands. If light was primarily a particle, it would have formed two parallel lines.
Index 1. Introduction Spectroscopy is a term which refers to the interactions of various types of electromagnetic radiation with matter. It is also a study of the absorption and emission of light and other radiation by matter. Dependence of this process related to the wavelength of the radiation. Spectrometers are used to measure the properties of light over a specific portion of the electromagnetic spectrum.
The resultant spectrum is usually a graph of intensity of emitted or absorbed radiation versus wavelength or frequency. The spectra used in spectroscopy varies from ultra-violet, visible, infra red ranges. The wavelength range for the three spectra are 0-400, 400-700 and above. In short, spectroscopy use to gain insight into the structure of molecules or the concentration of atoms or molecules in a sample. The chemists use infrared radiation to determine the structure of a new molecule, geologists uses ultraviolet radiation to determine the concentration of particular element in rock or
