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Define electrolysis
Using electricity to break a molecule down into its constituent elements
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Define polar molecule
A molecule that has slight positive and negative charges
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Define solvent
A liquid substance capable of dissolving other substances
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Define solute
A substance that is dissolved in a solvant
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Define cohesion
The phenomenon that occurs when molecules are strongly attracted to each other
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Define hard water
Water that has certain dissolved in it
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Suppose you did an electrolysis experiment like experiment 4.1 on hydrogen peroxide, whose chemical formula is h202. Which of the following results would you expect:a )same as with water ;B) equal amounts of hydrogen and oxygen or C )twice as much oxygen as hydrogen?
The results would be (b) equal amounts of oxygen and hydrogen. The chemical formula says there are two hydrogen's and two oxygens in each molecule of hydrogen peroxide. Thus there are equal amounts of each atom, resulting in equal amounts of each gas.
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Supposed to perform the experiment 4.1 with a test tube which had a crack in it. Gas could slowly be count that crack, but not as quickly as it was being made an experiment. Suppose further that the crack was in the test tube which held hydrogen gas. Which chemical formula might result from such a botched experiment :HO or H4O?
The chemical formula HO would be more likely the erroneous result. If the test tube which held hydrogen had a slow leak, then it would look like less hydrogen was collected then what should have been collected. Thus the experiment would indicate a chemical formula with less hydrogen atoms in it. H40 is an erroneous results that indicates there more hydrogen's HO is the one that indicates the last hydrogen
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Epsom salts, which you used in experiment 4.1, have the chemical formula of MgSO4. If MG is the symbol for magnesium, S stands for sulfur, and O represents oxygen, how much of each atom are in the molecule of Epsom salt?
There are no subscripts after the MG or the S, indicating one magnesium atom and one sulfur atom. There is a subscript of 4 after the O, indicating four oxygen atoms.
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Calcium carbonate is an ionic substance is commonly called chalk if this molecule has one calcium atom (Ca), one carbon atom (C) and three oxygen atoms(O) what is its chemical formula
You put the subscripts after each symbol to indicate the number of atoms. If the number is one, there is no subscript. This leads to an answer of CaCO3.
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One of the most common household cleaners is ammonia, whose chemical formula for NH3. How many atoms are in a molecule of ammonia?
There is no subscript after the N, indicating one atom there. The next letter is capital, so it must represent another atom. There is a subscript of three after it, indicating three of those. Thus there are a total of 4 atoms.
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A molecule is comprised of atoms that all pull on electrons with the same strength. Will this molecule be polar?
The molecule will be nonpolar. If the atoms all pull on electrons with the same strength, none will be able to get more than its fair share.
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Baking soda dissolves in water. Will it dissolve in vegetable oil, which is a non-polar substance?
Baking soda will not dissolve in vegetable oil. Since baking soda dissolve in water, it is either ionic or polar. Either way, it will not dissolve in a non-polar substance because only other nonpolar substances will dissolve in nonpolar substances
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Carbon tetrachloride will not dissolve in water. Is it made of ionic molecules, polar molecules, or non-polar molecules?
Carbon tetrachloride must be non-polar, otherwise it would have dissolved in water.
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Suppose you were able to count the molecules in a substance. Which would have more molecules, one liter of liquid water or 1 liter of ice?
The liquid would have more molecules because the molecules in solid water are farther apart than they are in liquid water. For the same volume, then, there will be more molecules in the liquid.
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If the substance in question number 15 were virtually any other substance, what would the answer be?
For any other substance, the answer would be that the solid would have more molecules. For virtually any other substance, molecules are closer together in the solid state, so there would be more molecules in an equal volume as compared to a liquid.
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What is responsible for water being a liquid at room temperature as well as Waters cohesion?
Hydrogen bonding is responsible. Hydrogen bonding brings the molecules close together and makes them want to stay close together.
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What causes surface tension?
Cohesion causes surface tension. You probably could say hydrogen bonding here if you were talking about water. However, other substances exhibit surface tension, even if they do not hydrogen bond. Hydrogen bonding just makes the water surface tension larger than many other substances.
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Why is water harder in certain regions of the world than in others?
Water is harder in some regions of the world because there is a higher amount of calcium-containing substances in some regions and others. It is these dissolve calcium-containing substances that cause hard water.
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