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18 Cards in this Set
- Front
- Back
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According to the law of conservation of mass why is the addition of calcium considered a mistake in a particular chemical equation? |
Because whatever you put in you, have to get out |
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Count atoms of hydrogen in a chemical equation example: H2O |
Two hydrogen one oxygen |
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Count atoms of oxygen in a chemical formula Example H2O2 |
Two hydrogens and two oxygen |
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Give an example of chemical reactions |
Burning, digesting, milk souring, baking, and rusting are chemical reactions |
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Give an example of a physical reaction |
Sharpening a pencil |
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What are the numbers in front of the symbols and formulas called ? |
Coefficients |
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What are the starting materials in a chemical reaction? |
Reactants |
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What are the substances formed from a chemical reaction? |
Products |
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What is a shorthand description of a chemical reaction using chemical formulas and symbols called? |
Chemical equations |
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What separates the formulas of the reactants from the formulas of the products? |
Yield sign |
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What type of reaction occurs when the baking powder is mixed with water and carbon dioxide gas is produced? |
A chemical reaction |
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Where do the reactants and products appear in a chemical equation |
In the beginning and in the end |
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In which type of reaction do ions in 2 compounds switch places? |
Double replacement |
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Water being broken down (decomposed) into the elements hydrogen and oxygen is an example of what type of reaction? |
Decomposition reaction |
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What is a decomposition reaction? |
A decomposition reaction is when a single compound is broken down into simpler substances |
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What kind of reaction occurs when a single compound breaks down to form two or more simpler substances? |
Decomposition reaction |
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What kind of reaction occurs when an element takes the place of another element that is part of a compound? |
Single replacement |
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What kind of reaction occurs when two or more substances combine to form a single compound? |
Synthesis |
