B) permanent dipoles of molecules containing covalent bonds between atoms of very different electronegativities. C) the hydrophobic effect. D) ion pairing between oppositely charged functional groups. Answer: A Page Ref: Section 5 28) The aggregation of nonpolar molecules or groups in water is thermodynamically due to the A) increased entropy of the nonpolar molecules when they associate. B) decreased enthalpy of the system.
I would then untwist the wires and put them in the correct color order that I need. Then I would flatten out the wires and in one hand hold my RJ-45 connector and then with the other hand feed the wires into the connector. This is usually pretty simple with the way the connectors are made, and they are also usually clear. After I’m sure that the wires are in the connector all the way, and in the right order, I would use a wire crimper to clamp[ the wires securely in to the connector. Coaxial cable- For the COAXIAL CABLE I would do the same first few steps by getting the correct length of cable that I would need.
The change in enthalpy relies on the concentration of the salt solution, because different concentrations will produce different enthalpies. There is an equation to determine how much of this heat energy is lost or gained when a reaction is performed. Q = c m (T1-T2) Where: q is the energy in Joules C is the heat capacity, measured in joules per gram per degree Celsius M is the mass of the solution, measured in grams J is the joules G is the grams of water T is the temperature ΔH=ΔE + PΔV = (q p +w) – w = q p Procedure: 1. Follow instructions 1-9 in Appendix A-1 to initialize the MeasureNet workstation. a.
Create a data table similar to the one below named Data Table: Oxidation-Reduction Experiment. 2. Take a 24-well plate: a. In well A1: Place 10 drops of Sodium Sulfate, Na2SO4 b. In well A2: Place 10 drops of Magnesium Sulfate, MgSO4 c. In well A3: Place 10 drops of Zinc Nitrate, Zn(NO3)2 d. In well A4: Place 10 drops of Iron (III) Chloride, FeCl3 e. In well A5: Place 10 drops of Copper (II) Sulfate, CuSO4 3.
5. Potassium hydroxide solution: Use 0.01 M potassium hydroxide, 0.56 g/L. 6. Ammonium hydroxide solution: Add water to 10 mL of concentrated ammonium hydroxide solution to make 82 mL of a stock solution. Use 10 mL of the stock and dilute to 1 L with distilled water.
If they don't line up, pull them out and line up. Do this carefully, as it's the last step before crimping on the connector. Step 8: Carefully insert the connector and cable into the crimping tool, which has two dies that will press into the connector, and push the pins in the connector into the conductors inside the connector. Now the installation is done. After the whole installation, you should check to ensure all conductors are making contact and that all pins have been crimped into their respective conductors.
Pb (NO3) 2 10. A compound is 42.3 % C, 5.94 % H, 32.9 % N, and 18.8 % O and has a molecular mass of 425.25 g/mol. Calculate the empirical and molecular formula. C15H25N10O5 11. How many moles of Al2O3 are produced by the reaction 200. g Al?
Part C: Density of an Irregular Shaped Solid 1) Obtain a sample of metal and determine the mass. 2) Fill a 100 mL or 50 mL graduated cylinder with water, recording its volume. 3) Using the water displacement method, determine the volume of the object. 4) Determine the density and percent error. Part D: Density of Methanol 1) Find the mass of an empty 10 mL graduated cylinder, and then fill approximately 9 mL of methanol and record volume.
The cap of a centrifuge tube was used to collect approximately one (1) gram of soil from the sample. This was then added to a bottle containing 99ml of sterile water for a 10-2 dilution, 1ml of 10-2 dilution was then added to a bottle containing 99ml of water for a 10-4 dilution. 1ml from the 10-4 dilution was then added to 99ml of water for a final dilution of 10-6. 1ul of each was plated on different starch agar plates with the aid of a micropipette and a plate spreader. The plates were then incubated for a week.
Equipment: - Ray box - Power supply - Wires - Perspex prism - Paper - Ruler and protractor - Single slit slide - Quadruplet slits slide - 2 colored slides Method: 1. Place the 2 color slides together on the correct side of the box e 2. Place the quadruplet slits slide on the other side 3. Connect the light box to the power supply with the wires 4. Place the box on a paper 5.