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Each water molecule is joined to _____ other water molecules by ____ bonds. (Activity 3A)
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| two ... hydrogen |
| four ... hydrogen |
| three ... ionic |
| four ... polar covalent |
| two ... polar covalent |
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The unequal sharing of electrons within a water molecule makes the water molecule _____. (Activity 3A)
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| change easily from a liquid to gaseous form |
| ionic |
| hydrophobic |
| polar |
| have a low surface tension |
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The tendency of an atom to pull electrons toward itself is referred to as its _____. (Activity 3A)
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| electronegativity |
| covalency |
| ionic potential |
| polarity |
| tonicity |
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In this molecule, what type of bond is found between the oxygen and hydrogens? (Activity 3A) 
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| polar covalent |
| hydrophobic |
| ionic |
| hydrophilic |
| nonpolar covalent |
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Which of these bonds is weakest? (Activity 3A)
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|  |
|  |
|  |
|  |
|  |
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Why isn't this insect drowning? (Activity 3A) 
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| Surface tension. |
| The insect is very light. |
| It is difficult to change the temperature of water. |
| The insect is swimming. |
| The insect is flying just above the water surface. |
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Click on the diagram to start the animation. What process is illustrated by this animation? (Activity 3B)
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| push |
| antigravity |
| evaporation |
| precipitation |
| gravity |
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What name is given to this molecule? (Activity 3C) 
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| water |
| methane |
| hydronium ion |
| glucose |
| hydroxide ion |
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How did this molecule form? (Activity 3C) 
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| Two water molecules bonded. |
| A water molecule gained an hydrogen ion from another water molecule. |
| Evaporation. |
| A hydrogen molecule bonded with an OH- molecule. |
| A water molecule split in half. |
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What name is given to this molecule? (Activity 3C) 
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| water |
| DNA |
| hydronium ion |
| glucose |
| hydroxide ion |
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Click on the diagram to begin the animation. This animation illustrates the _____ of water. (Activity 3C)
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| surface tension |
| adhesion |
| cohesion |
| specific heat |
| dissociation |
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Which of these is the correct equation for the dissociation of water? (Activity 3C)
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| H2O + H2O <==> H3O+ + OH- |
| H+ <==> H2O + H2O+ |
| H2O + H2O+ <==> H2O + OH- |
| H2O <==> H+ + OH- |
| H2O + OH- <==> H2O+ |
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What is the charge on a hydronium ion? (Activity 3C)
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| +1 |
| +2 |
| 0 |
| -1 |
| -2 |
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What is the charge on a hydroxide ion? (Activity 3C)
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| +1 |
| +2 |
| 0 |
| -1 |
| -2 |
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About _____ molecules in a glass of water are dissociated. (Activity 3C)
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| 1 in 1,000,000,000 |
| 1 in 1,000,000 |
| 1 in 5,000,000 |
| 1 in 2 |
| 1in 500,000,000 |
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What is the arrow pointing to? (Activity 3D) 
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| water molecule |
| hydroxide ion |
| electron |
| hydrogen ion |
| hydronium ion |
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What is the arrow pointing to? (Activity 3D) 
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| hydrogen ion |
| proton |
| hydroxide ion |
| hydronium ion |
| water |
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In a neutral solution the concentration of _____. (Activity 3D)
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| hydrogen ions is equal to the concentration of hydroxide ions |
| water molecules is less than the concentration of hydrogen ions |
| hydrogen ions is less than the concentration of hydroxide ions |
| water molecules is less than the concentration of hydroxide ions |
| hydrogen ions is greater than the concentration of hydroxide ions |
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How does the pH of the solution on the right compare with that of the solution on the left? (Activity 3D) 
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| The solution on the right is neutral relative to the solution on the left. |
| Both of these solutions are equally acidic. |
| The solution on the right is basic relative to the solution on the left. |
| Both of these solutions are equally basic. |
| The solution on the right is acidic relative to the solution on the left. |
