Lab 7 REPORT FORM_ CHEKERDJIAN

4. Draw the Lewis-dot structure for the organic molecule, CH3-O-CH3, below. A. State all the attractive forces acting on this molecule. (Note: attractive force = secondary force = intermolecular force; they all mean the same thing). B. What is the main intermolecular force for this molecule? C. Is this molecule polar or nonpolar? Provide a brief explanation (2-3 sentences) for your answer.

Answer all of the question above and dont left even one question behind.

In a post-lab question, a student was asked to explain heat curves. This is what they wrote:   "A heating curve shows how the temperature of a molecule changes as it is heated. First, it starts as a solid below its melting point. Then, as heat is put in, the bonds start to break at the phase change, and the molecule becomes a liquid. The temperature of the molecule cools slightly at this point. Then, the temperature rises again because the heat going in makes the molecules have greater potential energy (motion). At its boiling point, more bonds break and it turns into a gas. The phase changes are the flat regions of the heating curves because all the heat going in is used to break the bonds."   While they have a lot right, there are a number of mistakes. Highlight or copy-and-paste 2 errors, and explain what is wrong/how to fix the errors.

Part A) Consider the structural changes that occur in the following molecules. Begin by drawing the best Lewis Structure for each of the following molecules. BH3 CH4 NH3 H2O HF Part B)What are the ideal bond angles for each structure, and which are expected to be distorted? For the ones that are distorted look up on the internet and record their experimental values here:    Part C)According to Lewis and VSEPR theory, why do these changes occur?

Do not give handwriting solution.

Have each member of your group select one of the molecules and complete steps a–d. Have members present their results to the rest of the group, explaining the reasoning they used to determine their answers. CS2 NCl3 CF4 CH2F2 a. Draw the Lewis structure.b. Determine the molecular geometry and draw it accurately.c. Indicate the polarity of any polar bonds within the structure.d. Classify the molecule as polar or nonpolar.

Please answer the following questions in your own words.   Define the following terms:   Ion –    Valence electrons –   Atomic number –   Electronegativity –   Octet rule –   Explain the difference between a covalent, ionic, and hydrogen bond.     Compare and contrast polar and nonpolar covalent bonding. Identify 1 similarity and 1 difference.     Answer the following questions about water (H20):   Which type of chemical bond holds the hydrogen and oxygen atoms together in a single water molecule?   Which type of chemical bond holds different water molecules together in a water droplet?   Is water an example of a polar or nonpolar molecule? Explain.   Which atom in a water molecule has a greater electronegativity?   Will water dissolve nonpolar molecules? Explain.     Explain how the following properties of water are important to living organisms:   Water has a high heat of vaporization   Water is a good solvent   Ice is less dense than liquid water

Please help

Just making sure I'm answering correctly. Thanks

What is the chemical formula for ethane? Observe your ethane molecule. Are there any polar covalent bonds present? Based on your answer would you predict that ethane would or would not dissolve easily in water? Now imagine taking off one hydrogen from ethane and adding a hydroxyl group in its place. Draw your completed ethanol molecule below. ouy? Ethanol is an alcohol found in drinks such as beer and wine. Examine this molecule. Are there any polar cov bonds present? Based on your answer, would you predict that ethanol would or would not dissolve easily in water?

Rank the elements or compounds in the table below in decreasing order of their boiling points. That is, choose 1 next to the substance with the highest boiling point, choose 2 next to the substance with the next highest boiling point, and so on. substance A B с D chemical symbol, chemical formula or Lewis structure HgCl₂ H₂ HC1 .. H-0-0-H boiling point (Choose one) (Choose one) (Choose one) v (Choose one) X S

Given the organic molecule, determine whether it is polar or nonpolar. Explain your answer.

6,7,8,9,10 Letters ONLY

We don't see the answer written with a photo or pen, give the answer using the tool

Chemistry: Bonding 4a. Draw the Lewis structure for CH4, (methane), NH3, (ammonia), and H20 (water). b. Calculate the bond polarity for the C-H bond, N-H bond, and O-H bond. c. Classify these molecules as either polar or nonpolar. If the molecule is polar, label the partial negative and partial positive sides of the molecules you drew above.

7,8,9,10

I need help with this.

11. Complete the chart. **You should not have the same answer for all the IMF in the last column** Polarity of Molecular Formula Lewis Structure(1) Polarity of Molecule Justify your answer. What type of Intermolecular Forces exist in the molecule. Justify your Bond. Justify your answer. answer. 02 N2 H2O Between the H and the O NH3 Between the H and the N

Explain, in molecular terms, why oil and water do not mix.

Part II. Predict and illustrate the molecular geometry of the following molecules and determine whether or not they have molecular dipole (polar or nonpolar) by placing arrows. 1. CH4 2. SF2 3. CH3CI Activity 5 Which is which? For each pair of molecules, identify the one with the higher boiling point (BP), melting point (MP), viscosity (V), surface tension (ST) and vapor pressure (VP). Compounds BP H2O; CO2 CH4; H2S SF2; CC14 МP V ST VP

Attempts ****** n Force Once started, this test must be completed in one sitting. Do not leave the test before clicking Save and Submit. Completion Your answers are saved automatically. Remaining Time: 1 hour, 57 minutes, 27 seconds. * Question Completion Status: Moving to another question will save this response. Question 12 For the molecule: NO3 What is the geometry of the molecule? Are resonance forms possible? What is the hybridization of the central atom? Is the molecule polar? A Moving to another question will save this response.

Question 7 and 8 please

Solve this

1. Which is an example of a non-polar molecule that contains polar covalent bonds? A. H2O B. NH3 C. N2 D. CBr4 2. Which of the following molecules dissolves in water? A. C6H6 B. CBr4 C. CH3OH D. CCl4 3. SO3 molecules are ____. A. nonpolar B. either C. polar D. None of them 4. A polar molecule is one in which there is a separation of charge caused by ___. A. an uneven number of electron pairs B. an average distribution of electrons C. a non-uniform electron distribution D. a complete loss of electrons 5. Which of the following molecule is not polar? A. HF B. water (H2O) C. ammonia (NH3) D. H2

1/1 The table shows the type of bonding in a number of elements and compounds. Element or compound Type of bonding Fe, Na metallic NaCl, MgCl, ionic Co, Br, covalent within the molecules CL. di Drawa dot-and-cross diagram for carbon dioxide. ii Describe the shape of the carbon dioxide molecule. iii Explain why a carbon dioxide molecule has this shape. e Bromine is a liquid at room temperature. Weak van der Waals' forces hold the bromine molecules together. Describe how van der Waals' forces arise.

Look at the structure of a soap molecule, and explain what happened when you added soap to your oily hands and put your hands under the water for the solubility lab. Why could you wash the oil off your hands with soap and water? You should use chemistry concepts including structure, polarity, and intermolecular forces to explain your answer. attached is the lewis structure of a basic soap molecule. There are covalent bonds between all carbons, hydrogens, and oxygens. However, there is an ionic bond between oxygen and sodium ions.

Chapter 2: ange over time? If setpoints can change over time, what is this called? IS water a polar or non-polar molecule? Are polar or non-polar molecules more likely to be soluble in water? How does the structure of a water molecule contribute to the properties of water as a solvent (e.g. it is polar, it takes a lot of heat to change the temperature, etc.)? Compare and contrast the composition, structure, and functions of the four major groups of biomolecules. Which monomers are used to make polymers in each group (except lipids)? Be able to identify molecules from each group based on chemical structure (e.g.carbohydrate, nucleotide, phospholipid, amino acid, etc.) List the important functions of soluble proteins in the body. What is the law of mass action? Consider the chemical reaction A + B → AB. If we add more of substance A, what will happen to the amount of substance B and AB? What is an equilibrium constant (Keg)? Describe how the binding of a ligand to a protein is regulated…

8

Consider the perchlorate (CIO). anion. What is the central atom? Enter its chemical symbol. How many lone pairs are around the central atom? What is the ideal angle between the chlorine-oxygen bonds? Compared to the ideal angle, you would expect the actual angle between the chlorine-oxygen bonds to be... 0 0 (choose one) X

3,4,5,6

Match each item with the correct statement ¡¡¡· · · · What are bonds between molecules called? What is a property of polar molecules? What is a property of nonpolar molecules? What is the collective name for intermolecular bonding? What is the only force of attraction between noble gases? What dipole-dipole force between H and N, O, or F? results either What makes water a highly polar molecule? What force is responsible for holding polar molecules to one another? 1. 2. 3. intermolecular 4. 5. 6. 7. London dispersion polar covalent bonds and symmetrical structure hydrophobic 9. van der Waals forces hydrogen bond polar covalent bonds and asymmetrical structure 8. intramolecular hydrophilic 10. dipole-dipole

Have each member of your group select one of the molecules shown below and complete steps a–d. Each member should then present his or her results to the rest of the group, explaining the reasoning used to determine the answers. CS2 NCl3 CF4 CH2F2a. Draw the Lewis dot structure.b. Determine the molecular geometry and draw it accurately.c. Indicate the polarity of any polar bonds within the structure.d. Classify the molecule as polar or nonpolar.

1. How are covalent bonds formed? What type(s) of elements form covalent bonds? 2. How do the names of molecular compounds differ from the names of ionic compounds? 3. Explain the VSEPR theory and how it is used to determine the shape of a molecule. 4. Why is it necessary to draw the Lewis structure before determining the polarity or attractive force of a molecule? 5. How does the type of attractive force affect the melting point of a molecule?

Consider a molecule I2CO, what would be the molecular geometry? Would you predict the molecule is polar or nonpolar?