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15 questions
How many oxygen atoms are in the products for the chemical reaction below?
4Fe + 3O2 → 2Fe2O3
2
3
5
6
What do we call the chemicals that result from a chemical reaction?
reactants
products
subscripts
coefficients
The Law of Conservation of Mass says that matter can neither be __________ or __________.
created; destroyed
recycled; renewed
subtracted; added
joined; separated
How many atoms are in the products below?
4Fe +3O2 → 2Fe2O3
7
10
17
20
According to the Law of Conservation of Mass, what happens to the wood and oxygen when it is burned?
The wood disappears.
It stays the same chemically.
The atoms in the wood and oxygen rearrange and form smoke and ash.
Nothing.
When sodium and chlorine combine to form sodium chloride, sodium chloride is the:
Originator
Reactant
Product
Produce
How many Hydrogen atoms are in 4H2O?
6
8
2
4
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