What is a Chemical Equation?
Presentation
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Science
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7th Grade
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Practice Problem
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Medium
Standards-aligned
Heather Hinshaw-Chalker
Used 5+ times
FREE Resource
12 Slides • 11 Questions
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Multiple Choice
Which of the following best describes the role of a chemical equation?
It describes a chemical change by showing reactants and products.
It lists all the elements in the periodic table.
It measures the temperature of a reaction.
It shows the physical state of substances only.
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5
Multiple Choice
What is the difference between a reactant and a product in a chemical reaction?
Reactants are the chemicals you end with, products are what you start with
Reactants are always gases, products are always solids
Reactants are the chemicals you start with, products are the new chemicals formed
Reactants and products are always the same
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Open Ended
Explain how subscripts and coefficients are used in chemical equations to represent the number of atoms and molecules.
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Multiple Choice
In the chemical equation 2H₂ + O₂ → 2H₂O, identify the reactants and the product.
Reactants: H₂O, Product: H₂ and O₂
Reactants: H₂ and O₂, Product: H₂O
Reactants: O₂ and H₂O, Product: H₂
Reactants: H₂, Product: O₂ and H₂O
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Fill in the Blanks
Type answer...
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Multiple Choice
Which of the following statements best explains why the equation CH₄ + O₂ → CO₂ + H₂O is unbalanced?
There are more carbon atoms on the product side than the reactant side.
The number of hydrogen and oxygen atoms are not the same on both sides.
There are more molecules on the reactant side than the product side.
The equation has the same number of each type of atom on both sides.
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Multiple Select
Based on the diagrams of the unbalanced and balanced equations, what must be true for a chemical equation to be considered balanced? Select all that apply.
The number of each type of atom must be the same on both sides of the equation.
The total number of molecules must be the same on both sides.
The types of atoms must be the same on both sides of the equation.
The equation must follow the Law of Conservation of Mass.
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Multiple Choice
Which of the following is NOT a rule for balancing chemical equations according to the 'Rules of the Game'?
You can change subscripts to balance the equation.
Matter cannot be created or destroyed.
You can ONLY CHANGE coefficients.
Coefficients can only go in front of chemical formulas.
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Fill in the Blanks
Type answer...
20
Multiple Select
Based on the examples shown, which steps are helpful when balancing chemical equations?
Treating polyatomic ions as one unit if they appear on both sides of the equation
Changing subscripts to balance atoms
Balancing big formulas first and saving free elements for last
Placing coefficients in the middle of formulas
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Multiple Choice
What are the main parts of a chemical equation?
Reactant and Product
Element and Compound
Acid and Base
Metal and Nonmetal
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