Law of Conservation of Matter and Balancing Equations – Flashcards
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| What is the Law of Conservation of matter? |
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| During an ordinary chemical change, there is no detectable increase or decrease in the quantity of matter. |
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| What is the left side of a chemical equation called? |
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| Reactant |
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| What is the left side of a chemical equation called? |
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| Product |
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| How is the arrow in a chemical equation read? |
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| "Yields" |
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| What are the three types of chemical reactions? |
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| synthesis, decomposition, replacement |
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| If the total mass of the products is 10g, what was the total mass of the reactants? |
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| 10g |
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| True or False: A coefficient is a number placed in front of a chemical formula in an equation. |
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| True |
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| True or False: In an open system matter can enter from or escape to the surroundings. |
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| True |
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| What is a closed system? |
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| In a closed system, matter is not allowed to enter or leave. |
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| What is the smallest possible number of products in a decomposition reaction? |
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| two |
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| True or False: When one element replaces another in a compound, or when two elements in different compounds trade places, the reaction is classified as synthesis. |
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| False |
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| The substance produced in a chemical reaction is called the ________. |
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| Product |
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| What is the first step in balancing any equation? |
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| Write the equation |
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| True or False: A pear decaying in a glass dome is a closed system. |
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| True |
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| True or False: Matter is not conserved in chemical reactions. |
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| False |
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| True or False: When they are two or more reactants, they are separated by minus signs. |
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| False |
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| True or False: The number of reactants and products are always the same. |
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| False |
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| True or False: The formula of a compound identifies the elements in the compound and the ratios in which their atoms are present. |
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| True |
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| What is the basic structure of a chemical equation? |
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| Reactant + Reactant ---> Product + Product |
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| True or False:The subscript is at the end of an equation. |
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| True |
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| What is the formula that states that the ratio of carbon to oxygen is 1 to 2? |
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| CO2 |
