Which of the following statements is not true?a. Water is polar.b. Water stabilizes temperature.c. Water is essential for life.d. Water is the most abundant atom in Earth’s atmosphere.
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Which of the following statements is not true?
a. Water is polar.
b. Water stabilizes temperature.
c. Water is essential for life.
d. Water is the most abundant atom in Earth’s atmosphere.
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- Which of the following statements is not true? a. Water is polar. b. Water stabilizes temperature. c. Water is essential for life. d. Water is the most abundant molecule in the Earth’s atmosphere.Which of the following elements is or are common to both lipids and proteins? A. Carbon only B. Both hydrogen and oxygen C. Sulphur only D. Sulphur and nitrogenWhich of the following statements is incorrect? a. Isotopes have the same atomic number and different mass numbers. b. Atoms have about the same number of electrons as protons. c. All molecules consist of atoms. d. Free radicals are dangerous because they emit energy
- Because water has high specific heat... A. Water can change temperature more quickly than other substances. B. Water can stick to other water molecules C. Water can dissolve many substances D. Water will not change temperature as easily as other substancesAs water is chilled, its molecules slow their movement, and H-bonds form and hold water molecules further apart. This explains why.... a. Water is most dense just above freezing b. Ice floats c. Water molecules dissociate only a small amount d. Why living near a lake moderates temperatures on landThe four most abundant elements needed by the human body are carbon, hydrogen, oxygen, and nitrogen. Because these are needed in large amounts to support our cells, these are referred to as a. isotopes. b. bulk elements. c. buffers. d. trace elements. e. essential elements.
- Water’s life-supporting properties such as cohesion and temperature stabilization are due to: A.Water molecules have oxygen. B.Water molecules have hydrogen. C.Water molecules form hydrogen bonds with each other. D.Water molecules are small. E.Water molecules are hydrophobic.Select the statements that are TRUE regarding Water. SELECT ALL THAT APPLY A. Water is amphoteric B. Water can be a base C. Water is partially charged D. Water can be an acidWhich of the following statements is true? a. Acids and bases cannot mix together. b. Acids and bases will neutralize each other. c. Acids, but not bases, can change the pH of a solution. d. Acids donate hydroxide ions (OH–); bases donate hydrogen ions (H+).
- What is the major consequence of the H- bonding interactions among water molecules? A. Polarity of water molecules B. Water can dissolve most cellular components except lipids. C. Water can exist in 3 phases over a broad range of temperatures. D. Only water can sustain life E. All of theseWhich of the following statements about chemicalbonds is true?a. Covalent bonds are stronger than ionic bonds.b. Hydrogen bonds occur between two atoms ofhydrogen.c. Bonding readily occurs between nonpolar andpolar molecules.d. A molecule of water is unlikely to bond with anion.This occurs when the cations and anions are attracted to the positive and negative ends of water molecules: A. ionic bonding B. dissociation C. covalent bonding D. hydrogen bonding