Zinc Component

2. The primary coil in the design uses 22-gauge enamel-coated magnet-wire, with 24 turns around an object with a diameter of 1.25 inches.

In a chemistry stockroom, a vial of an Unknown White Compound was found. In order to properly dispose of the substance, the substance has to be identified .The possible compounds has been limited to one of 15 different compounds. Also, approximately 5 grams of the Unknown White Compound (UWC) were available for testing. In order to determine the properties of the compound, a series of tests was conducted. These tests included a ph test, a conductivity test, a flame test, a sulfate test, a halide test, an ammonium test, a solubility test, and a carbonate test. Using the results of these experiments, it was hypothesized that the UWC is potassium chloride. To further confirm the hypothesis, a synthesis of potassium chloride was conducted.

Unknown white compound (823U) was discovered in the lab. In order to dispose of it correctly, the substance and its physical and chemical properties had to be identified. The unknown white compound was one of a list of 15 compounds. 5g of the unknown compound were given in order to correctly identify and discover its physical and chemical properties. In order to do so, a solubility test, a flame test, and ion tests were conducted. From the results of these initial tests and the given list of compounds, the unknown white compound was thought to be composed of sodium and a halide (I-, Br-, or Cl-). Of the list, NaCl was the appropriate compound, however NaC2H3O3 was also tested out of skepticism. To verify the identity of the substance, the solubility and flame tests were performed again along with a pH test. The pH tests of NaCl and NaC2H3O2 did not match that of the unknown white compound. The list of compounds had been entirely ruled out. The identity of the unknown white compound was revealed to be calcium chloride. To synthesize at least a gram (calculated to produce 1.2g) of CaCl2, the following reaction was completed.

In the lab Which Is Your Metal, we attempted to identify an unknown metal by determining its specific heat capacity. We began by choosing a sample of metal, finding its mass, and describing it. We found the temperature of our boiling water. Then, we calculated the volume and temperature of the water in our calorimeter before and after the experiment. Through these calculations, we determined that the heat transferred to the calorimeter water from the hot metal was 595.65J (6.0x10²J with proper significant figures). After finding the heat transferred, we were able to calculate the specific heat capacity and match it to the correct metal. Our specific heat capacity came to 0.26J/g°C, which was closest to the

When all quantitative data has been collected and recorded, use the equation below to calculate the average electrical potential difference, or Average E_Cell of each variation of Copper Chloride.

The Monkey King character in Wu Ch'eng-en’s “Journey to West” displays excellent examples of characterization through both direct and indirect methods. The author directly references some of the Monkey King’s character traits directly in the story; however, the progression of his character is seen more completely through the character’s actions, thoughts, and his effect on other characters. While direct characterization sets the stage for the reader’s view of the Monkey King, the character’s personality is best seen through the various methods of indirect characterization.

It is necessary to identify the identity of two unknown metals. This is important because a metal scrap yard must know the identities of the metals before they can be recycled. It is also necessary to know what each metal is if a building is to be made using one or more of these metals. Identifying the metals will be done using intensive properties. Intensive properties do not depend on the amount of material present. Density is an intensive property found with the formula D=m/v. Which is defined as mass divided by volume to find the density.

The main purpose in doing this experiment was to figure out how much of the percentage of Copper’s mass is in a brass alloy using a spectrophotometer that is hooked up to the laptop. Another purpose in doing this experiment is to learn how to use the Beer’s Law plots to learn how to use the equation and get the correct concentrations. This is important in everyday context because it is important for people who work doing many different types of jobs. Safety Information: In this lab, we used nitric acid to reactant with copper.

Abstract The purpose of this experiment was to determine the effect of exciting electrons of certain elements in order to conclude the identities of three unknown elements. In order to do so, a sample of the each element was placed into a flame changing the flame’s color. The colors were a result of the electrons falling back to their ground state and releasing energy in the form of light. The results of this experiment proved that each element burned at a different wavelength, therefore, burning at a different color.

It is unfortunate that racism and sexism continues to exist in today’s generation. I really do not understand the differences between skin color or gender. I am not sure if the misunderstanding is because I grew up in a diverse community or my eyes and heart are blind. I am proud that I have raised my son to also have eyes and heart that are blind to color and gender. As a single parent I have had to change my tire and oil and with that same perspective, I will have my son wash his own clothes. I have shared with my son, if a woman can do the job, so can a man and vice-versa. In the video, A Class Divided, Jane Elliott, the third grade teacher shared a new perspective that was creative and perceptible and ethical. We are all humans with the same color of blood

A metal scrap yard was confronted with the issue of being unable to distinguish and identify the unknown metals that lay at waste in the yard. It is necessary to know which type of metal the scraps belong to in order to know where to send it for recycling. The problem at hand is how does an individual identify an unknown metal. As a scientist, the most functional and effective way of understanding which metal is which, is by acquiring its intensive properties. Examples of intensive properties are: temperature, color, hardness, density, melting point, boiling point, molecular weight, and pressure. These properties are key characteristics to look for when attempting to classify unknown metals. The intensive properties of the metal will allow

Synthesis and the determination of empirical formulas are two extremely important parts of chemistry. In this experiment, you will synthesize zinc iodide and determine its empirical formula. The molecular formula gives the actual number of atoms of each element in the molecule and the empirical formula gives the lowest whole number ratio of the atoms in the molecule. For instance, the molecular formula of glucose is C6H12O6 and its empirical formula is CH2O. For some

The purpose of these calculations was to determine the composition of the azeotrope made during the experiment. Following distillation, 2 ml of the azeotrope mixture were collected. As Table 2 shows, 1ml at a time was weighted and the density of each was evaluated. Then, in order to obtain the experimental density, the average of the two densities was calculated. The theoretical density was given in the lab book, and the value shown on Table 2 corresponded to 95 % ethanol at 25 C (122). Following the density calculations, standard deviation and percent error were determined. The standard deviation is the margin of difference between the experimental and theoretical values of an experiment. In this case, the standard deviation was 55g/L. The

Jasmine is 18 years old and has decided to become vegan. Because she is removing foods like meat, poultry, eggs, dairy products and fish, from her diet, she will need to eat a variety of plant based foods to get the nutrients she needs. Jasmine may miss out on nutrients such as zinc, iron, vitamin B12, calcium and omega 3 and omega 6 fatty acids.

China, a big country in terms of economy and total population, has been experiencing a dramatic demographic transition since 1979 when one child policy was implemented. Due to the concern that population growth can pose a threat to China’s economic development not only in the short-term but over the long term as well, the Chinese government adopted the strict birth control program, which is the one child policy. Under the policy, every Chinese family can only have one child, though some exceptions were made. Regulations for ethnic minority families are more flexible that they were allowed to have their second child. Furthermore, the policy was unevenly enforced. The birth control program was implemented more effectively in urban areas, where supervision systems were more complete and people were more willing to limit their family sizes, than in rural areas, which were characterized by strong traditional agrarian needs. In general, the one child policy really hit the goal in that China’s fertility rate and birth rate were found decreasing year by year. However, alongside the declining fertility, new problems emerge, especially the increase of aging populations.