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A CHEMICAL REACTION is a process in which substances undergo chemical changes |
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| A PRECIPITATE is a solid that forms from a solution(liquid) during a chemical reaction. | | |
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| | An ENDOTHERMIC REACTION is a chemical reaction that absorbs energy in the form of heat. |
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| An EXOTHERMIC REACTION is a chemical reaction that releases energy in the form of heat. | | |
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| | A MOLECULE combination of two or more atoms that are bonded together. Example: O2 or CO2 |
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| A COMPOUND is a substance made of two or more elements chemically combined in a set ratio. Example: Table Salt (NaCl) |
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| | A CHEMICAL EQUATION is a short, easy way to show a chemical reaction, using symbols instead of words. | | |
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| A FORMULA is a combination of symbols that shows the ratio of the elements in a compound. |
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| | A SUBSCRIPT is a number in a chemical formula that tells the number of atoms in a molecule or the ratio of elements in a compound |
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| | A substance that enters into a chemical reaction. |
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| | A PRODUCT is a substance formed as a result of a chemical reaction. |
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| | The LAW OF CONSERVATION OF MASS is the principle stating that matter is neither created nor destroyed during a chemical reaction. |
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| A COEFICIENT is a number placed in front of a chemical formula in an equation, that indicates how many atoms or molecules of each reactant and product take part in the reaction. |
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| SYNTHESIS is a chemical reaction in which two or more simple substances combine to form a new, more complex substance. |
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| DECOMPOSITION is a chemical reaction that breaks down a compound into simpler products. |
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| REPLACEMENT is a reaction in which one element replaces another in a compound, or in which two elements in different compounds trade places. |
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NaCl is an example of a ______________________ |
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Definition
NaCl is an example of a CHEMICAL FORMULA |
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CO2 is an example of a _______________. |
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CO2 is an example of a FORMULA |
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In the equation 2 Fe2O3 + 3C à 4 Fe + 3 CO2 what are the PRODUCTS? |
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In the equation 2Fe2O3 + 3C à 4 Fe + 3 CO2 the PRODUCTS are: 4 Fe + 3 CO2 |
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In the equation 2 Fe2O3 + 3C à 4 Fe + 3 CO2 what are the REACTANTS? |
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In the equation 2 Fe2O3 + 3C à 4 Fe + 3 CO2 the REACTANTS are: 2 Fe2O3 + 3C |
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In the equation 2 Fe2O3 + 3C → 4 Fe + 3 CO2 the numbers in red are examples of __________. |
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In the equation 2 Fe2O3 + 3C → 4 Fe + 3 CO2 the numbers in red are examples of COEFFICIENTS. |
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In the equation 2 Fe2O3 + 3C → 4 Fe + 3 CO2 the numbers in BLUE are examples of __________. |
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In the equation 2 Fe2O3 + 3C → 4 Fe + 3 CO2 the numbers in BLUE are examples of SUBSCRIPTS |
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The equation 2 Fe2O3 + 3C → 4 Fe + 3 CO2 shows you that _______ molecules of the compound Fe2O3 take part in the chemical reaction. |
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The equation 2 Fe2O3 + 3C → 4 Fe + 3 CO2 shows you that 2 molecules of the compound Fe2O3 take part in the chemical reaction. |
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The equation 2 Fe2O3 + 3C → 4 Fe + 3 CO2 shows you that _______ molecules of the compound CO2 are produced in the chemical reaction. |
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The equation 2 Fe2O3 + 3C → 4 Fe + 3 CO2 shows you that 3 molecules of the compound CO2 are produced in the chemical reaction. |
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3 Mg + N2 → Mg3N2 is an example of __________________________. |
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Definition
3 Mg + N2 → Mg3N2 is an example of A BALANCED CHEMICAL EQUATION |
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K + Br2 → KBr is an example of ________________________. |
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K + Br2 → KBr is an example of AN UNBALANCED CHEMICAL EQUATION. |
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Which is an example of a SYNTHESIS REACTION EQUATION? a) 2HgO → 2Hg + O2 b) C3H8 + 5O2 → 3CO2 + 4H2O c) 4Al + 3O2 → Al2O3 |
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Which is an example of a SYNTHESIS REACTION EQUATION? c) 4Al + 3O2 → Al2O3 |
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Which is an example of a REPLACEMENT REACTION EQUATION? a) C3H8 + 5O2 → 3CO2 + 4H2O b) P4 + 5O2 → 2P2O5 c) Mg3N2 → 3Mg + N2 |
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Which is an example of a REPLACEMENT REACTION EQUATION? a) C3H8 + 5O2 → 3CO2 + 4H2O |
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Which of the following is an example of a DECOMPOSITION REACTION EQUATION? a) C + H2O → CO +H2 b) 2H2O2 → 2H2O + O2 c) 4Sb + 3O2 → Sb4O6 |
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Which of the following is an example of a DECOMPOSITION REACTION EQUATION? b) 2H2O2 → 2H2O + O2 |
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In an EXOTHERMIC chemical reaction, ___________ is released in the form of heat. |
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In an EXOTHERMIC chemical reaction, ENERGY is released in the form of heat. |
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The numbers that appear in front of a chemical formula tell you ___________________________. |
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The numbers that appear in front of a chemical formula tell you THE NUMBER OF ATOMS OR MOLECULES OF EACH SUBSTANCE IN THE CHEMICAL REACTION. |
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In an ENDOTHERMIC chemical reaction, energy is _______________ in the form of heat. |
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In an ENDOTHERMIC chemical reaction, energy is ABSORBED in the form of heat. |
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The principle or LAW of CONSERVATION OF MASS states that . . . during a chemical reaction _________________________________________. |
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The principle or LAW of CONSERVATION OF MASS states that . . . during a chemical reaction matter cannot be created and cannot be destroyed. |
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A SUBSCRIPT is a number that tells _________________________________________. |
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A SUBSCRIPT is a number that tells THE NUMBER OF ATOMS IN A MOLECULE OR THE RATIO OF THE ELEMENTS IN A COMPOUND |
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All of the substances to the RIGHT of the → in a chemical equation are called the _______________. |
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All of the substances to the RIGHT of the → in a chemical equation are called the PRODUCTS. |
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All of the substances to the LEFT of the → in a chemical equation are called the _______________. |
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All of the substances to the LEFT of the → in a chemical equation are called the REACTANTS. |
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The → in a chemical equation means _________. |
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The → in a chemical equation means "yields". |
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A product is substance formed as a result of a ____________________________.
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A product is substance formed as a result of a CHEMICAL REACTION. |
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A formula is a combination of symbols that shows ________________________________________.
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A formula is a combination of symbols that shows the ratio of the elements in a compound. |
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A precipitate is a _______________________ that forms from a ________________in a chemical reaction. |
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A precipitate is a SOLID that forms from a SOLUTION (LIQUID) in a chemical reaction. |
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A CHEMICAL EQUATION is a short, easy way to show ___________, using symbols instead of words. |
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Definition
A CHEMICAL EQUATION is a short, easy way to show a chemical reaction, using symbols instead of words. |
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A FORMULA is a combination of symbols that shows the __________________ in a compound. |
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Definition
A FORMULA is a combination of symbols that shows the ratio of the elements in a compound. |
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CHEMICAL REACTIONS are characterized by a CHANGE IN ENERGY and are classified as either ___________________ or _________________. |
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CHEMICAL REACTIONS are characterized by a CHANGE IN ENERGY and are classified as either ENDOTHERMIC or EXOTHERMIC. |
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CHEMICAL REACTIONS can be classified by what happens to the REACTANTS and the PRODUCTS and thus be categorized as __________________ or ________________ or ______________. |
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CHEMICAL REACTIONS can be classified by what happens to the REACTANTS and the PRODUCTS and thus be categorized as REPLACEMENT REACTIONS or DECOMPOSITION REACTIONS or SYNTHESIS REACTIONS. |
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