Practice: Chemical Reaction?

Practice: Chemical Reaction?

27 Qs

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Practice: Chemical Reaction?

Practice: Chemical Reaction?

Assessment

Quiz

others

Medium

Created by

Damanjit Puri

Used 7+ times

FREE Resource

27 questions

Show all answers

1.

OPEN ENDED QUESTION

30 sec • Ungraded

Name:

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2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

1. What two substances react with each other when a candle burns?
the wick and oxygen
the wax and oxygen
the wick and carbon dioxide
the wax and water

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

2. When a candle burns, the reaction produces:
oxygen and water
carbon dioxide and wax
wax and oxygen
carbon dioxide and water vapor

4.

OPEN ENDED QUESTION

30 sec • Ungraded

3. If a burning candle is a chemical reaction, why does the flame go out when a jar is placed over the candle?

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5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

4. In the chemical equation above, what does the little “2” mean in CO₂?
there are two CO₂ molecules
there are two carbon atoms in a CO₂ molecule
there are two oxygen atoms in a CO₂ molecule
there are two CO molecules

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

5. In the chemical equation above, what does "2" in front of "2H₂O" stand for?
two water molecules are produced for every one methane that reacts
four hydrogen atoms are produced for every one methane that racts
two hydrogen molecules are produced for every one methane that reacts

7.

OPEN ENDED QUESTION

30 sec • Ungraded

6. In the animation, where do the atoms come from that make the carbon dioxide and the water on the right side of the equation?

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