Lab Report On Chemistry Lab

6-3: This process is used by cells to manufacture _biochemical energy from nutrients into adenosine triphosphate (ATP), and then release waste products__

The main objective of this experiment is to differentiate between a physical change and a chemical change.

When calcium chloride, sodium bicarbonate, and phenol red are put into a bag and mixed up the type of reaction that occurs is a chemical reaction for the following reasons. Things that indicate that a chemical reaction has occurred are color change, formation of precipitate, formation of gas, and energy transfer in which three of them took place in the reaction of calcium chloride, sodium bicarbonate, and phenol red. The three indicators in this experiment were: a color change, formation of gas, and an energy transfer

The mole is a convenient unit for analyzing chemical reactions. Avogadro’s number is equal to the mole. The mass of a mole of any compound or element is the mass in grams that corresponds to the molecular formula, also known as the atomic mass. In this experiment, you will observe the reaction of iron nails with a solution of copper (II) chloride and determine the number of moles involved in the reaction. You will determine the number of moles of copper produced in the reaction of iron and copper (II) chloride, determine the number of moles of iron used up in the reaction of iron and copper (II) chloride, determine the ratio of moles of iron to moles of copper, and determine the number of atoms and formula units involved in

In this project, C. Elegans are hermaphrodite worms that will be used since they are easy to maintain in lab, as well as have short life cycles. The gene that the project attempted to knockdown in C. Elegans with RNAi treatment is the unc-22 gene. RNAi disrupts gene expression in the presence of double stranded RNA (dsRNA) that is complementary to target gene sequence. The unc-22 gene codes for a muscle protein called twitchin in wild-type worms. The Unc-22 is required for muscle regulation and maintenance in C.Elegans. To verify that the RNAi treatment worked, would check the unc-22 mRNA levels in the worms, in addition to phenotype observation.

The purpose of this lab was to experimentally and scientifically ascertain the percentage of oxygen in Chem B at Woonsocket High School. It was hypothesized that if the percentage of oxygen is measured experimentally in Chem B at Woonsocket High School, then it would be higher than the percentage of oxygen in dry air, which is 20.95%, because the air is not dry due to moisture in the air from people breathing and the altitude of where the experiment takes place may affect it as well.

At station A when zinc and hydrochloric acid react with each other it is a chemical change because it creates gas bubbles and temperature change. At station B where NaOH solution and phenolphthalein react with each other it is a chemical change because it changed to the colour purple and the change looked difficult to reverse. Station C in which sulfuric acid and magnesium were to react with each other is a chemical change because it formed gas bubbles and changed colour. Station D where hydrochloric acid and Bromothymol blue were the materials is a chemical change because it changed to the colour yellow and looked difficult to reverse. In Station E where NaCl solution and AgNO3 solution were the materials is a chemical change because the reaction

to compare the results, and neither solution was expected to produce an observable chemical reaction. The procedure was the same as used for the test with 6M HNO3 and 0.1M AgNO3 solution and the test with 6M HCl and 0.1M BaCl2 solution. A third experiment used was the flame test. First, a scoopula was used to place 0.1 grams of the unknown compound in a test tube, and a wash bottle was used to add approximately 2 mL of deionized water to create a solution.

In a test tube, 0.5mL of the sample will be added with 0.5 mL of water and shaken vigorously. Take note for its solubility by parts (0.5mL is one part). Keep adding parts of the solvent until the sample is soluble. If not, add until ten parts of the solvent and determine its solubility. To separate test tubes, water will be replaced with ethanol, chloroform, ether, and acetone as solvents. Same procedures were

In the chemical and physical change lab, we figured out what a chemical change is. A chemical change is a change in which one or more substances are converted into a different substances. That means if a chemical change occurred the substances will be turned into a different substance. In order to know if a chemical change happened you will see bubbles, a color change, energy released as heat and light or a solid participate. The first example, of a chemical change in this lab is bubbles. In stations 6 and 8 each had bubbles in them. In station 6 the zinc was put into the HCI acid and once they touched they got bubbly and cloudy. Also in station 8 when a spoonful of baking soda and HCI acid touches the solution, it started to bubble and fizz.

Discussion: The main scientific concept explored in this laboratory was the ability to observe the chemical reaction between Fe and Cu and to determine the ratio of moles of iron used to moles of copper produced in the reaction. A chemical reaction occurred when we used 4.06 grams of copper (II) chloride and mixed it with 9.43 grams of iron nails. The copper (II) chloride used 1.24 grams of iron from the nails to produce 1.99 grams of copper solid.

I am Kristal Lopez in your Chemistry 120B– lab section 8 on Tuesdays and Thursdays from 11am to 1:50pm. I am writing to you because yesterday, Thursday September 22, in lab I forgot to get my lab notebook sheet signed and turn in the carbon copy. I was wondering if there was anything I could do about it? Thank you for your time and I hope you have a nice day.

Dispense .5 mL water into the already weighed conical vial, replace cap and face insert on its down side.

Molar Mass of NaHCO3 = 84.098 g/mol Moles in 0.10g = 0.10/84.098 = 0.00119 mol Moles in 0.20g = 0.20/84.098 = 0.00238 mol Moles in 0.30g = 0.30/84.098 = 0.00357 mol Moles in 0.40g = 0.40/84.098 = 0.00476 mol Moles in 0.50g = 0.50/84.098 = 0.00595 mol Moles in 0.90g = 0.90/84.098 = 0.0107 mol Molar mass of CH3COOH = 60.052 g/mol Moles in 5g = 5/60.052 = 0.0833 mol Amount of grams in 5mL of CH3COOH = 5mL* 1g/1mL = 5g CH3COOH

In order to investigate the expression of miR-365b-3p in normal cells and lung cancer cells, we used real-time PCR to measure the expression of miR-365b-3p in various cells. Results showed that the expression of miR-365b-3p was significantly lower in lung cancer cells compared with that in normal cells (Figure 1). After transfection, the expression of miR-365b-3p in COLO 668 cell line was successfully upregulated by miR-365b-3p mimic and inhibited by miR-365b-3p inhibitor (Figure 2A). Cell viability assay showed that miR-365b-3p suppressed cell viability while miR-365b-3p inhibitor promoted cell proliferation (Figure 2B). Furtherly,