Which statement is true about water molecules?
The oxygen atom has a negative charge.
The hydrogen atoms do not share electrons.
Water molecules move randomly around each other.
Water molecules cannot dissolve many substances.
Question 2. How does water relate to the ability of a living thing to generate energy?
Water is responsible for the generation of energy in the cell.
The cell is an aqueous environment.
Without the proper balance of water, chemical reactions in cells could not take place.
Question 3. What is the most important role of hydrogen bonding between water molecules?
It enables water molecules to bond to each other.
It allows oxygen and hydrogen atoms to be charged.
It allows cells to keep water in balance.
what are the answers for Ph, Acids, and Bases Quick Check
Question 1: Water molecules move randomly around each other. This is true because water molecules are constantly in motion due to the kinetic energy they possess.
Question 2: Without the proper balance of water, chemical reactions in cells could not take place. This is true because water is essential for various biochemical reactions that occur within cells, including the generation of energy through processes like cellular respiration.
Question 3: It enables water molecules to bond to each other. Hydrogen bonding is the most important role in water molecules as it allows them to stick together, forming cohesive and adhesive properties. This is why water has a high surface tension and can form droplets.
To answer the first question, we can evaluate each statement individually.
Statement 1: The oxygen atom has a negative charge.
This statement is true. In a water molecule, the oxygen atom has a slightly negative charge due to its higher electronegativity compared to hydrogen.
Statement 2: The hydrogen atoms do not share electrons.
This statement is false. In a water molecule, the oxygen atom shares its electrons with the two hydrogen atoms, forming covalent bonds. This sharing of electrons allows the water molecule to exist.
Statement 3: Water molecules move randomly around each other.
This statement is true. Water molecules are in constant motion and move randomly around each other due to their kinetic energy.
Statement 4: Water molecules cannot dissolve many substances.
This statement is false. Water is known as the universal solvent and has the ability to dissolve a wide range of substances due to its polarity and ability to form hydrogen bonds.
To answer the second question, we can evaluate each statement individually.
Statement 1: Water is responsible for the generation of energy in the cell.
This statement is false. While water is involved in various cellular processes, it is not directly responsible for the generation of energy. Energy generation in cells primarily occurs through processes like cellular respiration or photosynthesis.
Statement 2: The cell is an aqueous environment.
This statement is true. Cells are composed mostly of water, and cellular processes occur within a watery environment. Water plays a crucial role in maintaining the structural integrity and function of cells.
Statement 3: Without the proper balance of water, chemical reactions in cells could not take place.
This statement is true. Water is essential for many chemical reactions that occur within cells. It acts as a solvent, facilitating the transport of molecules, and provides a medium for metabolic reactions to occur.
To answer the third question, we can evaluate each statement individually.
Statement 1: It enables water molecules to bond to each other.
This statement is true. Hydrogen bonding is responsible for the cohesive forces between water molecules. These hydrogen bonds give water unique properties like high heat capacity and surface tension.
Statement 2: It allows oxygen and hydrogen atoms to be charged.
This statement is false. Oxygen and hydrogen atoms in water do not gain or lose charges due to hydrogen bonding. Hydrogen bonding is a result of the attraction between the partially positive hydrogen atom of one water molecule and the partially negative oxygen atom of another water molecule.
Statement 3: It allows cells to keep water in balance.
This statement is false. While water balance is important for cells, hydrogen bonding does not directly play a role in regulating this balance. Cellular mechanisms, such as osmosis and ion transport, regulate water balance in cells.
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Water molecules move randomly around each other.
Without the proper balance of water, chemical reactions in cells could not take place.
It enables water molecules to bond to each other.