In this lab,
In this lab,
4-6: Why did lung function in the deflated (left) lung return to normal after you clicked Reset?…
Avogadro’s number was obtained using information based on the thickness of the stearic acid monolayer. Once mass was found, volume of the acid was obtained in both trials, .000076 cm^3 and .000068cm^3 respectively. Then area was calculated 214cm^2 and 230cm^2 respectively. Thickness could be calculated with that data and it came out to .00000036cm and .00000030cm respectively. By dividing the thickness by 18, the height of one carbon atom was calculated to be .000000020cm and .000000017cm. Volume of one carbon atom was calculated by cubing that number to get 8.0x10^24 and 4.9x10^24. Then 3.42mol was used (volume of one mol of carbon) to calculate the number of atoms per mole (by dividing Vmol/Vatom) and the final results were 4.3x10^23 and 7.0x10^23. This same process was used in part II and 5.8x10^23 was calculated as the answer.…
In mini-lab 1, water was dropped onto the flat surface of a penny until the surface tension of the water was broken. 50 drops were able to be put onto the penny surface, with 51 drops of water being the point at which the hydrogen bonds of the water droplets that had created surface tension prior to drop number 51 failed to keep the surface tension, and the water spilt over the edges of the penny. This number of drops on the penny, 50, was possible because of cohesion. Cohesion created surface tension so the water molecules form hydrogen bonds of a greater strength with the water molecules around them. Cohesion is when a water molecule’s positive hydrogen end bonds with the negative oxygen end of another water…
A. Create a solubility curve for NH4Cl by plotting g NH4Cl/100 mL H20 on the y-axis, and crystallization temperature on the x-axis. Make sure to label each axis. On the same graph as the solubility curve for NH4Cl, add the solubility curve for NaCl using the data provided in Data Table 3.…
of oleic acid monolayer 1x10^-4 mL Estimated height of oleic acid monolayer 1.05x10 ^-4 cm Area of circle of oleic acid monolayer 0.95 cm² Surface area of top of one molecule 2.1…
50mL of 0.1 M HCL was obtained in a beaker. A second buret was rinsed with water and then a small amount of HCL, and then filled with HCL. It was then labeled ACID. The initial volume was recorded and then approximately…
Hypothesis: If certain species are missing from the ecosystem except humans (blue), then all other species will feel the effects.…
First, I would take a sample from different areas of the water to test the amount of dissolved oxygen in the water. Then after completing this test, I would check to see if there is” of course “an increase in the fish present in the water. This observation would help keep track of the fish present in different areas of the water and furthermore, I would be able to compare results.…
Lichens are a sybiotic association of fungus (mycobiont) and algae (Pediastrum boryanum . The fungus engulfs the algae, then supplies carbs, nitrogen, and vitamins while the algae photosynthesizes. This unusual relationship enables the lichen to grow in environments where neither fungus nor algae would normally be able to solely survive. They are found on every continent, ranging all the way from the freezing Arctic to the sweltering grasslands of Africa. Even though they can live in such extreme conditions, they do require clean air. This is why they are excellent environmental indicator. An indicator species is an organism whose presence or absence reflects the overall health of an environment. Lichens flourish where there is good air quality; however, they cannot survive where the air is polluted and toxins loom. This is because they have no stomata, or pores, to shut to keep the toxins out; therefore, absorbing all of the pollutants in the air. Because they are such unique organisms, they accumulate different metal anions in the air than other organisms, like plants do, for example. Lichens attract toxic metal ions. An ion is a charged atom. If the ion has a positive charge, it is a cation. An ion with a negative charge is an anion. During the ion exchange process, Hydrogen, an anion, is released and metal cations move in. This process occurs when lichens are exposed to polluted air. When the lichens are dropped into any of the metal solutions, their cell wall releases the methylene blue ions, which are replaced by metal cations. Upon their detachment, the ions integrate into the solution, which in turn, colors it blue. The darker the solution, the more metal cations taken in by the lichen. Valence is a measure of how much an atom wants to combine with something else. If the valence of a metal ion affects lichen uptake, then the higher the cation, the…
The objective of the lab is to separate the caffeine samples we are using, using thin layer chromatography. The solvent we are using for the separation is 3:1 mixture of Chloroform and Acetone.…
Hypotheses: if the enzyme concentration is increased then the rate of reaction will increase. If the enzyme concentration is decreased then the rate of reaction will decrease.…
The number of electrons forming a charge cloud around the nucleus is (pick one of the following) greater than; equal to; smaller than the number of protons in the nucleus of the atom.…
Cited: 2"Experiment 1B: Analysis of Sulfuric Acid Solution." Marin.edu. N.p., n.d. Web. 24 Sept. 2012. <http://www.marin.edu/homepages/ErikDunmire/CHEM131/Experiment1B.pdf>.…
3 Watch each part of the experimental demonstration and make preditions about wht will happen in each scenario . Record your preditions and observations in the Data an Observations section of your labatory report format.…
INTRODUCTION There are many reasons for knowing the identity of microorganisms. The reasons range from the knowing the causative agent of a disease to knowing the correct microorganism in order to make antibiotics. This study was done by applying the following methods; OF Glucose, Indole Production, and Malonate Utilization test for the identification of an unknown bacterium. The methods will assist in determining the unknown bacterium found in a 55 year old male that was passing blood and mucous in his stool. The patient had no pain but mild discomfort during bowel movements. The doctor noted inflammation of the lining of the rectum. The doctor removed a tissue sample for examination and referred the patient to a gastroenterologist for a barium xray and colonoscopy. While utilizing the methods stated above, the bacterium found was a facultative anaerobe due to the Gram Negative Rods, fermentation, and the production of indole. The specific Gram Negative Enteric Bacilli was Shigella dysenteriae. There are many reasons for knowing how to control bacterial growth as well as such as antimicrobial drugs, which assist the body’s defenses against pathogens. Microorganisms are capable of causing infection or spoilage. Controlling bacterial growth is important in poultry farm businesses that use equipment to decontaminate processing plant fluids before disposal. During quality control and safety evaluations, bacteria growth that needs to be controlled can be found. While controlling bacterial growth, clusters of Gram Positive Cocci were found. It was found some ways to control bacterial growth were disinfection, sterilization, antisepsis, sanitization, moist and dry heat, filtration, and radiation; just to name a few. The specific method used for control depends on various circumstances.…