Which statement helps to explain why ice is less dense than liquid water?O(a) Water molecules make hydrogen bonds at definite angles.(b) Cold molecules move less than warm molecules.O (c) Hydrogen bonds lengthen in the cold.All of the above.O Both (a) and (b).

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Answered: Which statement helps to explain why…

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter2: Life's Chemical Basis

Section: Chapter Questions

Problem 7SA: The mutual attraction of opposite charges holds atoms together as molecules in an _______ bond. a....

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The “octet rule” in chemistry helps predict the types of bonds thatatoms will form. In general, an atom will be most stable if it fills itsouter shell of 8 electrons. Atoms with fewer than 4 valence electronstend to donate electrons and those with more than 4 valence electronstend to accept additional electrons; those with exactly 4 can do both.Using this rule, determine what category each of the followingelements falls into: N, S, C, P, O, H, Ca, Fe, and Mg. (You will needto work out the valence of the atoms.)
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72. Use Figure 2 to answer the following questions. (1.4) KU HOCH, OH C3 H C H С — H ОН ОН ribose Figure 2 (a) Which type of molecule does this diagram represent? (b) What is the chemical formula for this molecule? of macromolecules does this (c) What group molecule belong to? エーO エ-O
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нннн ннннН с-С-с-с-с-С-С-С-С-с-н HHHH HHHH H H. Ising the graphic above, answer the following question. orrectly identify the above molecule. s this molecule solid or liquid at room temperature? Name a major source of this macromolecule.
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Which statement helps to explain why ice is less dense than liquid water? O(a) Water molecules make hydrogen bonds at definite angles. (b) Cold molecules move less than warm molecules. O (c) Hydrogen bonds lengthen in the cold. All of the above. O Both (a) and (b).