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SVEN [57.7K]
3 years ago
9

Which of the following changes are chemical changes?

Chemistry
2 answers:
Rashid [163]3 years ago
4 0

Answer:

Gasoline is burning

Explanation:

examples of chemical changes are burning , cooking,rusting and rotting

Oliga [24]3 years ago
4 0

Answer: Option (c) is the correct answer.

Explanation:

A change that does not bring any difference in chemical composition of a substance are known as physical properties.

For example, shape, size, mass, volume, density, etc of a substance are all physical change.

And, a change in which there occurs a difference in chemical composition of a substance then it is known as chemical change.

For example, precipitation, reactivity, toxicity etc are chemical change.

When gasoline is burned then it is a chemical change.

Thus, we can conclude that out of the given options gasoline is burned change is a chemical change.

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Answer:

Using valence bond theory, HgCl2 is sp hybridized while PCl3 is sp3 hybridized.

Explanation:

sp hybridized molecules are largely covalent and cannot conduct electricity hence the nonconducting nature of HgCl2. PCl3 contains a lone pair and three unpaired electrons in sp3 hybridized orbitals.

5 0
3 years ago
Why Can alloys not be described using chemical formulas?
Reptile [31]
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6 0
4 years ago
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¿ que característica tiene el conocimiento científico ?
saw5 [17]

Answer: El conocimiento científico es un saber crítico (fundamentado), metódico, verificable, sistemático, unificado, ordenado, universal, objetivo, comunicable (por medio del lenguaje científico), racional, provisorio y que explica y predice hechos por medio de leyes.

Explanation: El conocimiento científico es un saber crítico (fundamentado), metódico, verificable, sistemático, unificado, ordenado, universal, objetivo, comunicable (por medio del lenguaje científico), racional, provisorio y que explica y predice hechos por medio de leyes.

7 0
3 years ago
Which of the following statements about the brain is true? a. The skull could support as much as 3 tons of weight. b. The brain
Thepotemich [5.8K]

Answer:

a. The skull could support as much as 3 tons of weight.

Explanation:

The true statement about brain is  

a. The skull could support as much as 3 tons of weight.

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rest all statements are wrong.

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3 years ago
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