Sharpening a pencil leaves behind pencil shavings. is sharpening a physical or chemical change

Chemistry

2 answers:

marta [7]2 years ago

7 0

Physical

because the pencil is not changing to a new substance, just changing form :)

IgorLugansk [536]2 years ago

6 0

Physical damage.

If you burned the pencil, it would be considered chemical.

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tate whether the following changes are physical or chemical for rancidipication fixation of water 2 tearing of paper 3 rusting o

damaskus [11]

Answer: Physical change : tearing of paper, fixing of wtaer

Chemical change: rusting of iron , electrolysis of water, Rancidification

Explanation:

Physical change is a change in which there is no rearrangement of atoms and thus no new substance is formed. There is only change in physical state of the substance.

Example: tearing of paper, fixing of wtaer

Chemical change is a change in which there is rearrangement of atoms and thus new substance is formed. There may or may not be a change in physical state.

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Linking monomers together to form a polymer .This chemical reaction also forms water molecules.

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This is a type of reaction which involves the linking of two or more monomers to form a polymer.

Dehydration reaction forms water molecules as part of the product thereby making it the most appropriate choice.

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1 year ago

What substances is a liquid at room temperature

Vesnalui [34]

Answer:

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Explanation:

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2 years ago

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How does freezing affect the volume of water?

MrRissso [65]

Increases the volume of water

Explanation:

Freezing of water causes the volume of water to increase by a whooping 4%. This is why the density of water is slightly different that of ice.

When ice freezes it expands and takes up more volume of space for the same mass given.

This is why bottles break when water in them is frozen.

This increase in volume is why ice floats on water. It makes it less dense.