What does the Law of Conservation of Mass state?
Conservation of Mass

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Science
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6th - 8th Grade
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Hard
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1.
FLASHCARD QUESTION
Front
Back
The Law of Conservation of Mass states that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.
2.
FLASHCARD QUESTION
Front
How does heating a gas in a balloon affect its mass?
Back
Heating a gas in a balloon causes the gas to expand, but the mass of the gas remains the same.
3.
FLASHCARD QUESTION
Front
If you start with 50g of reactants, what is the expected mass of the products?
Back
The expected mass of the products will also be 50g, according to the Law of Conservation of Mass.
4.
FLASHCARD QUESTION
Front
What happens to the mass of an object when it undergoes a physical change, such as melting?
Back
The mass of the object remains the same during a physical change, such as melting.
5.
FLASHCARD QUESTION
Front
In a chemical reaction, if 30g of reactants produce 25g of products, how much mass is lost?
Back
5g of mass is lost, which is the mass of the reactants that did not convert into products.
6.
FLASHCARD QUESTION
Front
What is an example of a physical change that does not affect mass?
Back
Melting ice is an example of a physical change that does not affect mass; the mass remains the same before and after melting.
7.
FLASHCARD QUESTION
Front
How can you determine the mass of gas produced in a reaction?
Back
You can determine the mass of gas produced by subtracting the mass of the products from the mass of the reactants.
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