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Intro To Chemical Reactions Slide Show
By Joe Acquarelli
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Last updated about 4 years ago
20 questions
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Question 20
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What happens during a chemical reaction?
Atoms are not rearranged to from a new substance
New substances are formed with the rearrangement of atoms
No new substance is formed
What 2 elements are shown in the slide to your right?
Hydrogen and oxygen
Hydrogen and osmium
Helium and osmium
Helium and oxygen
What side of the yield arrow do you find the reactants?
left
D
right
C
Substances that are destroyed by the chemical change are the reactants.
True
False
Substances created by the chemical change are called products
True
False
What side of the yield arrow do you find the products?
Right
Left
What does the + sign mean
separates just 2 reactants products
separates 2 or more reactants or products
separates zero reactants or products
What does the arrow/yield sign mean?
separates reactants from products
separates elements form compounds
separates products from reactants
Glow sticks are an example of a chemical change
True
False
Hand warmers are an example of chemical changes
True
False
Vinegar and baking soda is an example of a chemical change.
True
False
Rust is not an example of a chemical change.
True
False
Slime is not an example of a precipitate.
True
False
What is the subscript in a chemical equation?
is the large-sized number on the bottom right of the symbol
is the small-sized number located on the bottom right of the symbol
is the small-sized number located next to the element
is the large-sized number located next to the element
What is the subscript in a chemical equation?
is the large-sized number on the bottom right of the symbol
is the small-sized number located next to the element
is the large-sized number located next to the element
is the small-sized number located on the bottom right of the symbol
What elements are present in the chemical equation?
osmium and hydrogen
oxygen and helium
osmium and helium
oxygen and hydrogen
Exothermic energy aborbs heat energy from its surroundings.
True
False
Endothermic energy releases heat energy to its surroundings.
True
False
Check all boxes that are examples of exothermic energy
ice cream melting
crayons melting in the sun
lighting a match
hand warmers
combustion car engine
frozen lake
Check all boxes that are examples of endothermic energy
crayons melting in the sun
hand warmers
lighting a match
frozen lake
combustion car engine
ice cream melting
