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2 years ago

Which of the following is an example of a physical change?

Chemistry

2 answers:

o-na [289]2 years ago

7 0

Answer:

I think b is the correct answer

just olya [345]2 years ago

4 0

Answer:evaporation in a swamp cooler

Explanation:

Evaporation in a swamp cooler simply involves the conversion of water in the liquid state to water in the gaseous state. It is an easily reversible process if the vapour can be collected and condensed. A chemical change involves the formation of a new substance and is not easily reversible. It is a chemical reaction. A dry cell operates by a chemical change which produces voltage in the cell. Digestion involves a series of irreversible chemical reactions catalysed by enzymes. Hence the answer.

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Use the table to answer the question.

Alex17521 [72]

Answer:

High levels of moisture are contained within an air mass.

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Explanation:

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2 years ago

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Should we only write condensed formula in chemical equations (for lessons like carbon and compounds). What did your teachers say

Firlakuza [10]

Answer:

Here's what I get.

Explanation:

If your teachers don't ask for a specific type of formula, a condensed structural formula should be OK.
If they ask specifically for a structural formula or a bond-line formula, that is what you must give.

Bottom line: ask your teachers in advance what they expect.

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3 years ago

Two or more assistance

Goryan [66]

I believe it would be a compound.

4 0

3 years ago

HELPP!!

ikadub [295]

Answer: C. CO₂ and H₂O

Explanation:

Combustion reactions produce carbon dioxide and water.

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2 years ago

True or False: Water is a liquid at – 5 °C.

Lilit [14]

Answer:

False

Explanation:

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2 years ago

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