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MariettaO [177]
2 years ago
6

1. What is an indicator and how does it work?​

Chemistry
1 answer:
Goryan [66]2 years ago
7 0

Answer:

Chemical indicator, any substance that gives a visible sign, usually by a color change, of the presence or absence of a threshold concentration of a chemical species, such as an acid or an alkali in a solution. An example is the substance called methyl yellow, which imparts a yellow color to an alkaline solution.

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Look at the diagram of the solar system.
arlik [135]

Answer:

Retrograde Motion

Explanation:

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NOTE: Ptolemy: an ancient astronomer, geographer, and mathematician who considered the Earth the center of the universe (the "Ptolemaic system").

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3 years ago
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1. Define the term public health.
Flura [38]

Answer:

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Explanation:

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Fluorine has the highest. Fluorine's electronegativity is 4.0
3 0
3 years ago
HELP PLEASE I WILL MARK YOU AS A BRAINLIEST
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Answer:

a food pyramid.

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the food pyramid shows how autotrophs are at the bottom and how the top predators are at the top, in this case the eagle.

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