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What must be balanced on both sides of a chemical equation?
Reactants
the release of heat energy
4
The digestion of food
The number of atoms of each element used in the equation
Subscripts
True
temperature, color, smell, precipitate, bubbling, light, new substance
What is a byproduct of most chemical reactions?
Reactants
the release of heat energy
4
The digestion of food
The number of atoms of each element used in the equation
Subscripts
True
temperature, color, smell, precipitate, bubbling, light, new substance
How may atoms of Oxygen are in this formula? (assume that the numbers after each atomic symbol is the subscript for that element) - C2H4O4
Reactants
the release of heat energy
4
The digestion of food
The number of atoms of each element used in the equation
Subscripts
True
temperature, color, smell, precipitate, bubbling, light, new substance
Which is the BEST set of indicators that a chemical reaction has happened?
Reactants
the release of heat energy
4
The digestion of food
The number of atoms of each element used in the equation
Subscripts
True
temperature, color, smell, precipitate, bubbling, light, new substance
How do humans use chemical reactions every day?
Reactants
the release of heat energy
4
The digestion of food
The number of atoms of each element used in the equation
Subscripts
True
temperature, color, smell, precipitate, bubbling, light, new substance
What are the chemical formulas on the LEFT side of a chemical equation called?
Reactants
the release of heat energy
4
The digestion of food
The number of atoms of each element used in the equation
Subscripts
True
temperature, color, smell, precipitate, bubbling, light, new substance
What are the small numbers to the bottom-left of an atomic symbol called?
Reactants
the release of heat energy
4
The digestion of food
The number of atoms of each element used in the equation
Subscripts
True
temperature, color, smell, precipitate, bubbling, light, new substance
Two clear liquid solutions are combined together, then a white solid precipitate begin falling to the bottom of the solution. This is evidence of a chemical reaction having occurred.
Reactants
the release of heat energy
4
The digestion of food
The number of atoms of each element used in the equation
Subscripts
True
temperature, color, smell, precipitate, bubbling, light, new substance
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