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Furkat [3]
2 years ago
9

What are some ways you can determine a chemical change has occured

Chemistry
1 answer:
FromTheMoon [43]2 years ago
4 0

1. Color changes.

The Statue of Liberty, though known for its green color, was originally covered in a layer of copper. After a redox (reduction-oxidation reaction) the color changed due to a chemical change.

2. Gas Production

3. Light Produced

Light sticks work as the result of a chemical reaction between hydrogen peroxide and phenol oxalate ester.

4. Temperature Changes

5. Volume Change

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Archy [21]

Salt and water is formed as product, when Arrhenius acid and Arrhenius base reacts and the reaction is known as neutralization reaction.

<h3>What is Arrhenius acid-base reaction?</h3>
  • The concept of acid and base based on the theory of ionization which was first proposed in 1884 by Svante Arrhenius
  • According to Arrhenius, on dissociation in water the hydrogen-containing compounds which give H+ ions or protons are the acids and  the hydroxide compounds which give OH− ions on dissociation in water are bases.
  • This theory is applicable only to compounds which are dissolved in aqueous solution.

To learn more about Arrhenius acid-base reaction: brainly.com/question/15196401

#SPJ4                                                                                    

4 0
1 year ago
Please help! How many grams is 4.5 x 10^27
Eva8 [605]

Answer: The answer is 4.5e+27 grams, I hope I helped!

Explanation: N/A (I threw away my paper ^^")

4 0
3 years ago
How many moles of NaOH are required to prepare 2.90 L of 1.8 M NaOH?
marusya05 [52]
V=2.90 L
c=1.8 mol/L

n(NaOH)=vc

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3 0
2 years ago
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In a body of water, the surface tension caused by the attraction between water molecules is strong. Which of the following is a
Marina86 [1]
<span>Answer: Objects with a higher density than water can be observed floating on water

Water spider is one of the animals that can walk above the water. The legs of the spyder float because the force that it gives to the water surface is not higher than the surface tension, thus the water didn't break. Even though the spider density is higher than water, it could look like floating above the water.</span>
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umka2103 [35]

Answer:

B

Explanation:

because its says mesozoic era

4 0
3 years ago
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