Term
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Definition
| substance that enters into a chemical reaction |
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Term
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Definition
| substance produced by a chemical reaction |
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Term
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Definition
| substance that increases the rate of a chemical reaction without being changed by the reaction |
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Term
| What is the number that describes how many molecules of a substance are involved in a chemical reaction? |
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Definition
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Term
| Define synthesis reaction. |
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Definition
| Two or more substancese combine to form a new more complex substance |
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Term
| What is the letter formula for a synthesis reaction? |
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Definition
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Term
| Define decomposition reaction. |
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Definition
| a complex substance breaks down into two or more simpler substances |
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Term
| What is the letter formula for a decompostion reaction? |
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Definition
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Term
| Define single replacement reaction. |
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Definition
| An uncombined element replaces an element that is part of a compound |
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Term
| What is the letter formula for a single replacement reaction? |
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Definition
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Term
| Define double replacement reaction. |
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Definition
| Different atoms in two different compounds replace each other. |
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Term
| What is the letter formula for a doubler replacement reaction? |
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Definition
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Term
| What does increasing the temperature do to the rate of a chemical reaction? |
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Definition
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Term
In the formula 5C H O
6 12 6,
how many atoms of hydrogen are there? |
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Definition
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Term
| What is the name for an expression in which symbols and formulas are used to represent a chemical reaction? |
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Definition
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Term
| Compare and contrast endothermic and exothermic reactions. |
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Definition
Endothermic= chemical reaction in which energy is absorbed.
Exothermic= chemical reaction in which energy is released. |
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Term
| What is collision theory? |
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Definition
| The rate of a reaction is affected by four factors: concentration, surface area, temperature and catalyst. |
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Term
| What is activation energy? |
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Definition
| energy required for a chemical reaction to take place. |
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Term
| What does decreasing surface area do to reaction rate? |
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Definition
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Term
| How does concentration of reactants effect reaction rate? |
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Definition
| a high concentration rate means there are many particles per unit volume so more collisions may occur. |
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Term
| Compare and contrast physical and chemical changes. |
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Definition
physical= just a change of form where it could go back to the original form
chemical= changes into a new form and cannot be reversed. |
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Term
| How are the law of conservation of mass and the balancing of chemical equations related? |
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Definition
| because the number of atoms of each element remains the same (like in a chemical equation the atoms have to ballance out at the same time) |
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Term
| Give a step by step description of how to balance an equation. At least 4 steps. |
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Definition
1. Write a chemical equation with correct symbols and formulas.
2. Count the number of atoms of each element on each side of the arrow.
3. Balance atoms by using coefficients
4. Check your work by counting atoms of each element. |
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Term
| List all of the information a balanced chemical equation provides. At least 4 things. |
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Definition
| The element, the type of reaction , the number of molecules, the number of atoms, the products, the reactants. |
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