law of conservation of mass

law of conservation of mass

Assessment

Flashcard

Chemistry

7th Grade

Hard

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51 questions

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1.

FLASHCARD QUESTION

Front

A student mixes 125 grams of sugar, 250 grams of water and 5 grams of flavoring. The solution weighs...

Back

380 grams

2.

FLASHCARD QUESTION

Front

Which of these is not a chemical reaction? Options: Burning of wood, Milk going bad, Mixing vinegar and baking soda, Melting of ice

Back

Melting of ice

3.

FLASHCARD QUESTION

Front

If reaction starts with 20g of reactants, it should produce?

Back

a total of 20g of products

4.

FLASHCARD QUESTION

Front

What will weigh more when a chemical change is complete? The reactants before the chemical reaction, or the product after the reaction is complete?

Back

They both will weigh the same

5.

FLASHCARD QUESTION

Front

Jamie weighs a glass of water and observes its weight to be 12 ounces. Jamie then adds 6 ice cubes to the glass of water. Each ice cube weighs one ounce. After all of the ice cubes have melted, what will be the approximate weight of the glass of water?

Back

18 ounces

6.

FLASHCARD QUESTION

Front

According to the Law of Conservation of Mass, what happens to the wood and oxygen when it is burned?

Back

The atoms in the wood and oxygen rearrange and form smoke and ash.

7.

FLASHCARD QUESTION

Front

What are the starting substances in a chemical equation?

Back

Reactants

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