Calculate the surface area of the circle formed (πd2/4): Surface area = .785 cm2 2. Calculate the number of molecules on the top layer. We must convert the surface area in centimeters squared to nanometers squared and then multiple that by the surface area of a sodium stearate molecule. Convert the surface area of the circle formed (#1) to molecules per layer using the matrix below: Answer = 4.76*10^14 molecules/top layer 3. Calculate the concentration of grams of sodium stearate per milliliter of diluted solution.
Now it’s time to do the mixing!! Gather all of your ingredients for the crust and a large mixing bowl. The first step is to add 2 cups of sifted flour into the large mixing bowl along with 1 cup butter flavored shortening. Then use a pastry cutter or dough hooks to mix well, once all the ingredients are combined and resemble crumbs add the 1/3 cup of ice water use the folding method to combine, and lastly form a ball. Warp the dough ball with plastic wrap or whatever you may have set in the refrigerator for no less than 40 minutes.
DNA Extraction Aim: To extract DNA from a carrot using house hold products. Method: * Step 1 – Pour 60 ml (¼ cup) of clear alcohol into a glass. Place the glass into the bowl of iced water to chill, then set aside. * Step 2 – Pour 120 ml (½ cup) of tap/distilled water into the measuring cup with the salt. Add 30 ml (2 tablespoons) of clear detergent and mix carefully until the salt is dissolved.
Now that everything is set up, one is ready to begin the process of making oreo balls. First, one’s hands should be washed thoroughly. Then take the whole package of oreo cookies and place them in a food processor. Mix the oreo cookies until they are just crumbs. Add the softened cream cheese to the food processor and make sure that the oreo cookies and cream cheese are mixed well together.
Tap them gently with sterile forceps to stick them to the agar. 4. Repeat step 5 using the plates of , E coli, S. aurens and B.
Most animals need to stay at roughly the same temperature so heat is also exchanged. The larger the surface area to volume ratio is the easier it will be for the animals to perform these exchanges. Gas exchange surfaces have to main adaptations, large surface area and they are thin, they will both increase the rate of diffusion. Single celled organisms don’t require gas exchange systems because they can absorb and release gases by diffusion through there outer surface because they have a relatively large surface area. Large organisms require gas exchange systems to acquire all the oxygen they need, fish for example have special adaptations because there is less oxygen in the water than in the air.
About 3mL of the wash water is collected in a small test tube. A few drops of 0.1M silver nitrate solution is added to the water to test for the presences of Cl- ions. Lastly the filter paper was placed in the dry oven to dry completely and then weighted. Calculations and observations were made and recorded. Observations The
Density Lab Report Objective: To measure the density of different materials. Materials: 400 mL Beaker Ruler Water Triple Beam Balance Box of Density Cubes Goggles Tongs Procedure: 1. Put on all safety equipment and gather all materials. 2. Create a chart (A) in your data section with three columns.
Determine what your group’s hypothesis will be and write it as an “if, then” statement on your lab report. 2. Label each petri dish with the 4 different amounts of salt using the grease pencil: (control (0%), 1%, 2% and 3%) 3. To make salt concentrations of 1%, 2% and 3%: -Place 100 mL of water in beaker -To make a concentration of 1%, add 1 gram of salt (for
b) Open the cover of the petri dish halfway and pour in the agar to just cover the bottom of the dish. Try to minimize the introduction of bubbles. c) Repeat for all the dishes. d) Immediately rinse the flask with warm water to facilitate washing the flask. 5.