4. Hydrogen bonding occurs between: O Water and water. O Water and polar molecule. O Between two hydrogen-containing polar molecules. O Between a polar hydrogen and a polar oxygen. O All of the above.
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- 1. A single covalent bond is made up by a shared pair of atoms T or F If not, then 2. Double covalent bonds consist of 4 electron pairs that are shared T or F If not, then 3. Water molecules are held together by non-polar covalent bonds T or F If not, then 4. A water molecule is held together by polar covalent bonds T or F If not, then 5. Methane molecules are held together by non-polar covalent bonds T or F If not, then 6. A methane molecule is made up of non-polar hydrophobic interactions T or F If not, then Amino acid 1 Amino acid 2 R Identify non-polar covalent bonds below. NH, NH HQ Identify polar covalent bonds (H HC Dipeptide (H C HQ Dontide hand (H NH, NH Betore bonding Cevalent bonds fermed Oygen stem The above reverse reaction is a reaction; the forward reaction is a Hydregen atom Hydrogen lem WatermeleculeO11. The atoms of a certain element each contain 11 protons and 1 valence electron. Which statement correctly identifies this element and describes its chemical reactivity? The element is fluorine, and it is not very reactive. The element is fluorine, and it is highly reactive. The element is sodium, and it is highly reactive. The element is sodium, and it is not very reactive. CLEAR ALL1. The partial negative charge at one end of a water molecule is attracted to the partial positive charge of another water molecule. This attraction is called: a. a covalent bond b. a hydration shellhydrogen bond d. a hydrophobic bond e. an ionic bond 2. True or False. A hydrogen bond that is linear is more stable than one that is bent.
- 15. Some molecules that are covalently bonded do not have a difference in charge across the mol- ecule. These molecules are referred to as nonpolar. What arrangement of electrons would result in a nonpolar molecule? 16. Some examples of nonpolar molecules include fats, oils, and waxes. How do these substances interact with water? 17. What prediction would you make about why oil and water interact in the way described above?2. Explain why one molecule of water has polar covalent bonds.2.List four characteristics of water that are emergent properties resulting from hydrogen bonding
- 20.Bonds: a Complete the bond table below. Bond Type Short Description Types of Atoms involved Example POLAR Covalent Bond NON POLAR Covalent Bond Ionic Bond Hydrogen Bond 21. Which type of bond from the table above is the weakest? 22. What type of ion is formed when an atom loses an electron? 23. What if an atom gains an electron?When atoms with the same or similar electronegativities are bonded together, they pull on electrons O equally and form an ionic bond O unequally and form an ionic bond O equally and form a polar covalent bond O unequally and form a polar covalent bond O equally and form a nonpolar covalent bond O unequally and form a nonpolar covalent bond13. Which of the following bonds share electrons? Ionic bonds B C. All of the above D. None of the above Covalent bonds 14. Which of the following is true? A. A pH of 4 has 10x more the amount of hydrogens than a pH of 3 B. A pH of 3 has 10x more the amount of hydrogens than a pH of 4 C. A pH of 4 has 100x more the amount of hydrogens than a pH of 3 D. A pH of 3 has 100x more the amount of hydrogens than a pH of 4
- 38 5 4. peed video have shown that cats use an interesting technique to drink aqueous substances like water and milk. Four times which then shuts before gravity can pull the water back down. w cats to drink in this fashion, including how water's molecular structure contributes to the process. e appropriate blanks in the sentences on the right. Terms can be used once, more than once, or not at all. Reset Help Water molecules stay close to each other as a result of existence of hydrogen bonds. Collectively, hydrogen bonds hold the substance together, this phenomenon is called cohesion The clinging of one substance to another, which is called adhesion also plays a role. In this way, adhesion of water tırough hydrogen bonds to the molecules, which comprise the villi on the cat's tongue, helps counter the downward pull of gravity. As a result, such a phenomenon as adhesion helps drops of water stay whole and attached to each other. At the same time, cohesion allows drops to be transported…Figure 2.24 Which of the following statements is false? Molecules with the formulas CH3CH2COOH and C3H6O2 could be structural isomers. Molecules must have a double bond to be cis-trans isomers. To be enantiomers, a molecule must have at least three different atoms or groups connected to a central carbon. To be enantiomers, a molecule must have at least four different atoms or groups connected to a central carbon.Organic molecules consist mainly of ______ atoms. a. carbon b. carbon and oxygen c. carbon and hydrogen d. carbon and nitrogen