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Bogdan [553]
3 years ago
5

Define Physical and Chemical change

Chemistry
1 answer:
vlada-n [284]3 years ago
7 0

Answer:

Explanation:

Chemical is when there is a change of color odor or temperature rises

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So basically, the change in color effects the amount of cations in the solution making it a physical change rather than a chemical one, defying the law of conservation of mass! I hope this helped! (The only time the change in color affects the amount of cations is in the Alkaline Earth Metals)

source: college science teacher 
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The difference between a independent variable and a dependent variable
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4 years ago
Why is the C-H bond length and strength different for ethyne, ethene and ethane?
stepan [7]

Answer:

The length and strength of the C-H bond are different for ethine, ethylene and ethane due to the difference between the s characters (sp 3, sp 2, sp) in each chemical structure, which gives stronger bonds. For example, the length of the C-H bond in ethino is 1.06Å, which is also less than in ethane (1.09Å) or ethylene (1.08Å).

Explanation:

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4 years ago
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Which is a characteristic of a Lewis base? it behaves as the electron donor. It behaves as the electron acceptor. It donates a h
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<em>Answer:</em>

  • It behaves as the electron donar. Its is correct one

<em>Definition of lewis base:</em>

  • Lewis base is a such a substance which donate pair of electron to Lewis acid.

<em>Example:</em>

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<em>Condition</em>

  • There should be lone pair of electron
  • Negative charged substances or anions
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The force of the swing. 
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