Law of Conservation of Matter and Balancing Equations

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

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