2.2 Chemical Bonds - Anatomy & Physiology ~ Amazing News

Which statement explains why hydrogen gas, H2, ammonia, NH3, and ethylene, H2CCH2, are similar? Water, because strong hydrogen bonds form between its molecules. In the liquid state, water molecules are held together by weak hydrogen bonds. It takes more heat energy to vaporize water than it would if the bonds did not exist.Water has many properties that are critical to maintaining life. It is polar, allowing for the formation of hydrogen bonds, which allow ions and other polar molecules to dissolve in water. Therefore, water is an excellent solvent. The hydrogen bonds between water molecules give water the ability to hold heat better than many other substances.The hydrogen and oxygen atoms within water molecules form polar covalent bonds. The shared electrons spend more time associated with the oxygen atom than they do with hydrogen atoms. There is no overall charge to a water molecule, but there is a slight positive charge on each hydrogen atom and a slight negative charge on the oxygen atom.which statements best helps explain the formation of the hydrogen bond represented in the figure? The nitrogen has a partial negative charge, and the hydrogen attached to the oxygen has a partial positive charge. hydrogen bonds form between water molecules because a positive charge and a negative charge is attracted to each other.The hydrogen bonds that form between water molecules account for some of the essential — and unique — properties of water. The attraction created by hydrogen bonds keeps water liquid over a wider range of temperature than is found for any other molecule its size.

2.2 Water - Concepts of Biology - 1st Canadian Edition

4) In a hydrogen bond between a water molecule and another biomolecule, _____. A) a hydrogen ion on the water molecule forms an ionic bond with a hydride ion on the other molecule B) the hydrogen bond will typically form between a hydrogen atom and either a nitrogen, sulfur, or oxygen atom35) The hydrogen bond between two water molecules forms because water is A) polar. B) nonpolar. C) a liquid. D) a small molecule. E) hydrophobic. Answer: A 36) What type of bond would most likely form between two polar molecules? A) ionic bond B) hydrogen bond C) peptide bond D) covalent bond E) No bond would form; the molecules would repel each other. Answer: B 37) Which statement is anB.) Water molecules form covalent bonds. C.) Water molecules contain negatively charged oxygen atoms. D.) Most materials do not dissolve in water. Which statement best explains why a carbon atom can bond easily with other atoms? A.) It has four valence electrons. B.) It is an ion. C.) It forms hydrogen bonds. D.) It is an organic element.How does the pattern of hydrogen bonding explain the lattice that makes up ice crystals? Applications for Hydrogen Bonds. Hydrogen bonds occur in inorganic molecules, such as water, and organic molecules, such as DNA and proteins. The two complementary strands of DNA are held together by hydrogen bonds between complementary nucleotides (A&T, C&G).

Water | Biology I

Start studying (a) how hydrogen bonding occurs between water molecules; properties of water and roles of water for living organisms. Learn vocabulary, terms, and more with flashcards, games, and other study tools.Correct answers: 1 question: Which statement explains why hydrogen bonds are able to form between water molecules? Water molecules are polar. Water molecule atoms have weak atomic bonds.. Water molecules show adhesion. Water molecules are large.The hydrogen bonds between water molecules give water the ability to hold heat better than many other substances. As the temperature rises, the hydrogen bonds between water continually break and reform, allowing for the overall temperature to remain stable, although increased energy is added to the system.Third, water has a higher boiling point than HF, yet fluorine is more electronegative than oxygen, it is also smaller, and so you would expect the HF hydrogen bond to be stronger than the OH hydrogen bond. In fact, this is all try, and what this argument does not take into account is the number of hydrogen bonds.Ø Hydrogen bond formed between two molecules is called intramolecular hydrogen bond.. Ø The bond dissociation energy of hydrogen bond in liquid water is about 23 kJ/mol.. Ø The bond dissociation energy of covalent bond between O and H in water molecule is 470 kJ/mol.. Ø Hydrogen bonds in water are very unstable and they frequently break and reform in liquid water.

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