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Dahasolnce [82]

3 years ago

11

give an example of a model used in science that is larger then the real object and an example of a model that is smaller than th

e real object

1 answer:

Alekssandra [29.7K]3 years ago

8 0

A model of an atom is much bigger than a real atom, but the model of the solar system is obviously much smaller.

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Explain, in your own words, why different elements produce different colors of light when heated.

fgiga [73]

Different elements produce different colors of light when heated because the electrons in these elements have different permissible energy levels. When an element is heated, the electrons inside it become excited and move to an higher energy level from the ground state. When the electrons drop from this higher energy level, they typically emit energy quantum, the color of the light that is observed at this stage depends on difference that exist in the two energy levels.<span />

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3 years ago

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You have an aqueous solution of chromium(III) nitrate that you titrate with an aqueous solution of sodium hydroxide. After a cer

barxatty [35]

Answer:

The precipitate was chromium hydroxide, which then reacted with more hydroxide to produce a soluble complex, Cr(OH)4

Explanation:

The following reaction takes place when chromium(III) nitrate reacts with NaOH:

$Cr(NO)_{3}$ +3 NaOH → $Cr(OH)_{3}$ (s)+ $NaNO_{3}$

The precipitate that is formed is chromium hydroxide, $Cr(OH)_{3}$

When more NaOH is added, the precipitate reacts with it which then results in the formation of a soluble complex ion:

$Cr(OH)_{3}$ (s) + $OH^{-}$ (aq) → $Cr(OH)_{4} ^{-}$ (aq)

$Cr(OH)_{4} ^{-}$ is soluble complex ion

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A bond exists between A and B in the compound AB. A and B are sharing electrons. The type of bond is

Jlenok [28]

Answer: Covalent Bond.

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Which is the study of the processes within living organisms?

rewona [7]

Biology, I believe xx

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Organisms that breakdown waste and dead organisms and return the raw materials to the environment is called

just olya [345]

Decomposer, decomposers include fungous, bacteria, worms. They break down trash and bad things and concert it to soil.

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