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Law of Conservation of Matter and Balancing Equations
Law of Conservation of Matter and Balancing Equations
21
Chemistry
8th Grade
11/26/2010

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Cards

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