GIZMOS STUDENT EXPLORATION : Balancing Chemical Equations latest update 2024
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Course
GIZMOS STUDENT EXPLORATION
Institution
GIZMOS STUDENT EXPLORATION
Vocabulary: coefficient, combustion, compound, decomposition, double replacement, element,
molecule, product, reactant, single replacement, subscript, synthesis
Prior Knowledge Questions (Do these BEFORE using the Gizmo.)
The scouts are making s’mores out of toasted marshmallows, chocolate, an...
Prior Knowledge Questions (Do these BEFORE using the Gizmo.)
The scouts are making s’mores out of toasted marshmallows, chocolate, and graham crackers.
4 full s'mores cannot be made from 5 cookies and 3 pieces of chocolate.
1. What is wrong with the image below? ___________________________________________
2. Assuming a s’more requires two graham crackers, one marshmallow, and one piece of
2
chocolate, how many s’mores could you make with the ingredients shown? _____________
Gizmo Warm-up
In a chemical reaction, reactants interact to form products.
This process is summarized by a chemical equation. In the
Balancing Chemical Equations Gizmo, look at the floating
molecules below the initial reaction: H2 + O2 H2O.
2
1. How many atoms are in a hydrogen molecule (H2)? ___
2
2. How many atoms are in an oxygen molecule (O2)? ____
1 H and 1 O
3. How many hydrogen and oxygen atoms are in a water molecule (H2O)? ________________
4. In general, what does a subscript (such as the “2” in H2) tell you about the molecule?
A subscript tells you how many atoms of that element are present in the molecule.
_________________________________________________________________________
5. A chemical equation is balanced if the number of each type of atom on the left side is equal
No
to the number of each type on the right side. Is this reaction balanced? ________________
2018
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