Environmental chemistry

The results found in the collated table supports the hypothesis, however, it was not as accurate as expected. From observation of the collated results, it can be seen that the greatest froth volume is found at 30oC, rather than the predicted optimum temperature of 39oC. Errors within the individual group results, concluded that the both 10oC and 20oC were wrong due to the vast froth volumes. For a smaller amount of catalase, this would result in a smaller froth volume, conversely, with a greater…

The objective of this investigation was to separate a dry mixture based on its physical properties. The iron was separated using a magnet and the salt was removed because it was soluble in water, while the remaining sand was not. The mixture in its tray weighed 51.61 grams. The container weighed 2.51 grams, so the mixture alone weighed 49.10 grams. Running a magnet over the mixture successfully removed the iron. It was determined that the more surface area a mixture was spread over, the more…

ETHICS APPLICATION FORM - Ultrasound imaging of trained and untrained muscles 1. DESCRIBE THE BASIC PURPOSES OF THE PROPOSED RESEARCH. If a person gets paralyzed and cannot move certain muscles, those muscles tend to change structure and get weaker. It would be useful to have a method of seeing what condition the muscle is in order to rehabilitate the person effectively as well as using that method to help clinical diagnosis of ailments known to cause muscle degradation. The basic purpose of…

unique history are three phrases that describe many things. However, all three combined only seem to describe Birthstones. Birthstones are amazing objects that affect our economy in many ways. More importantly, birthstones have a deep connection to chemistry and science. Due to their chemical properties, birthstones can also be used for medicinal purposes and healing techniques that have helped humans throughout time. Overall, birthstones contain many disciplines and the concept is one of the…

A different type of Japanese bamboo had been studied by Phong et al. (2012). Moso bamboo was harvested and processed using several methods to obtain the fiber. In alkali extraction method, the bamboo was cut into thin slabs with length and thickness of 25 cm and 3 mm, respectively. The slabs were immersed in different concentration NaOH solution (1%, 2%, 3%) at 70 ⁰C for 10 h. This study showed that only 1% NaOH resulted in higher mechanical properties. The roller looser was then used to produce…

I’m contacting you about the concentrations of the two copper (II) sulfate solutions that you were unable to correctly identify. The good news is that, for both samples, we were able to accurately determine their concentrations using Beer’s Law, a well-established law that governs the relationship between a solution’s concentration and the amount of wavelength the solution can absorb under standard conditions. Before going any further, though, let me fill you in on some of procedures and…

Discussion of Results and Scientific Explanation To achieve the goal of determining an unknown acid or base, anion and cation test were performed. These tests allowed for the components of the solutions to be identified, therefore, achieve the second goal. The pH was also used in to help find the identity of the unknown solutions and it was used to draw conclusions about the solutions. Dilutions were used to help understand the different behaviors of different concentrations. Household items…

The NASA Antares Rocket exploded out of the air, after it was clearly safe to launch. 5,000 pounds of supplies and more than 200 million dollars were wasted. Heading to the space station on the rocket were several experiments given by the Chinese, Russians, Americans, and Australians. They were supposed to be tested in space to examine their effects in space however, after the explosion, the experiments need to be returned back to each country accordingly. The Chinese will get LB (mineral oil),…

by which various chemical substances combined with each other could be explained nicely if one assumed that chemical combination was the group together of atoms possessed of definite weights” (Chang 135). Thomas Thomson wrote in his history of chemistry “the atomic theory first occurred to Dalton during investigations of olefiant gas and carbureted hydrogen gas…Dalton found that if the amount of carbon was the same in each compound, then carburetted hydrogen gas contains exactly twice as much…

down to his office to discuss the idea that my high school was going to cut the AP chemistry class for the following year and I had to pick a new science class for my junior year. When I asked why he told me that there were only eleven people signed up for the class and that they wanted fifteen to keep it open. To be fair it was understandable that most people would not want to sign up. Many found honors chemistry to be incredibly difficult and would be happy to be rid of it once they finished…