Chemical Reactions Retake Test

Chemical Reactions Retake Test

Assessment

Flashcard

Science

8th Grade

Hard

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15 questions

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1.

FLASHCARD QUESTION

Front

How many atoms of nitrogen (N) are in the equation: 2Co(NO₃)₂?

Back

4

2.

FLASHCARD QUESTION

Front

What is the definition of an independent variable?

Back

The variable that we change on purpose.

3.

FLASHCARD QUESTION

Front

Balance the chemical equation: ___ Al + ___ O₂ -> ___ Al₂O₃

Back

4,3,2

4.

FLASHCARD QUESTION

Front

What is NOT an example of a physical change?

Back

A piece of paper catching fire and turning into ash.

5.

FLASHCARD QUESTION

Front

How many oxygen atoms are in the chemical formula: 3Fe₂O₄?

Back

12

6.

FLASHCARD QUESTION

Front

What is a chemical reaction?

Back

A process where substances (reactants) transform into new substances (products).

7.

FLASHCARD QUESTION

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

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