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Questions and Answers
Which type of chemical reaction involves the combination of two or more reactants to produce a single product?
Which type of chemical reaction involves the combination of two or more reactants to produce a single product?
- Synthesis reaction (correct)
- Neutralization reaction
- Substitution reaction
- Decomposition reaction
In a decomposition reaction, what generally happens to the reactant(s)?
In a decomposition reaction, what generally happens to the reactant(s)?
- They break down into two or more products (correct)
- They remain unchanged
- They combine to form a single product
- They are replaced by other substances
What is the defining feature of a substitution reaction?
What is the defining feature of a substitution reaction?
- There is no change in the number or type of substances.
- Two or more reactants combine into a single product.
- A single reactant breaks down into multiple products.
- Two or more reactants transform into two or more products. (correct)
In the reaction where copper and silver nitrate react to form copper nitrate and silver, which type of reaction is this an example of?
In the reaction where copper and silver nitrate react to form copper nitrate and silver, which type of reaction is this an example of?
What is conserved during both physical and chemical changes?
What is conserved during both physical and chemical changes?
What happens to the mass of a substance when it undergoes a physical change?
What happens to the mass of a substance when it undergoes a physical change?
During a chemical change, if one or more substances are transformed into different substances, what happens to the mass of the reactants compared to the products?
During a chemical change, if one or more substances are transformed into different substances, what happens to the mass of the reactants compared to the products?
Iron combines with oxygen to produce iron oxide. Which of the following reaction types best describes this process?
Iron combines with oxygen to produce iron oxide. Which of the following reaction types best describes this process?
Water decomposes into oxygen and hydrogen gas. Which reaction type does this describe:
Water decomposes into oxygen and hydrogen gas. Which reaction type does this describe:
In a closed system, 10 grams of reactant A react with reactant B to produce products C and D. If the mass of product C is 6 grams, what is the most likely mass of product D, assuming complete conversion and the law of conservation of mass?
In a closed system, 10 grams of reactant A react with reactant B to produce products C and D. If the mass of product C is 6 grams, what is the most likely mass of product D, assuming complete conversion and the law of conservation of mass?
Flashcards
Synthesis Reactions
Synthesis Reactions
Reactions where two or more reactants combine to form a single product.
Decomposition Reactions
Decomposition Reactions
Reactions where a single reactant breaks down into two or more products.
Substitution Reactions
Substitution Reactions
Reactions where two or more reactants transform into two or more products.
Conservation of Mass
Conservation of Mass
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Physical Change
Physical Change
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Chemical Change
Chemical Change
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Study Notes
- Chemical reactions are represented by chemical equations.
- Reactants become products.
Types of Chemical Reactions
- Three types of chemical reactions can be identified based on the number of reactants and different products involved.
Synthesis Reactions
- Synthesis reactions involve the combination of two or more reactants to generate or synthesize a single product.
- Iron, when in contact with water, combines with oxygen from the atmosphere and generates iron oxide.
- Iron + Oxygen -> Iron oxide
- A + B -> C
Decomposition Reactions
- Decomposition reactions involve a single reactant that generates or decomposes into two or more products.
- Electric current from a battery causes water to decompose into oxygen and hydrogen, which are two gases at room temperature.
- Water -> Oxygen + Hydrogen
- A -> B + C
Substitution Reactions
- Substitution reactions involve two or more reactants that transform into two or more products.
- Copper and silver nitrate react chemically to form copper nitrate and silver crystals
- Copper + Silver nitrate -> Copper nitrate + Silver
- A + BC + D
Mass Conservation in Changes
- Changes in matter can affect both the physical properties and the very nature of substances.
- Changes do not make matter appear or disappear
- The quantity of matter is conserved in both chemical and physical changes.
- Physical changes: When a substance undergoes a physical change, its mass is conserved.
- The quantity of matter after the change is the same as before.
- Chemical changes: When one or more substances undergo a chemical change and transform into other substances, the mass of the reactants and the mass of the products is the same.
- Quantity of matter is conserved during the chemical change.
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