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4 years ago

Explain why the population of trout might increase if the population of frogs decreased

1 answer:

6 0

If the population of frogs decreased, an animal that eats frogs and trout will decrease because it's food source is declining. Then, since the predator population is declining, the trout population will increase. The trout will have less predators to worry about.

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2Al2O3 → 4Al + 302

Anuta_ua [19.1K]

540g

Explanation:

Given parameters:

Mass of the aluminium oxide = 1020g

Unknown:

Mass of aluminium = ?

Solution:

To find the mass of the aluminium formed from this reaction, we work from the known to the unknown. The known here is the mass of the aluminium oxide.

Using this mass, find the number of moles in the aluminium and relate it using the balanced equation to that of the unknown aluminium.

From the number of moles, we can easily find the mass of the aluminium.

Solving:

Balanced equation:

2Al₂O₃ → 4Al + 3O₂

Number of moles of Al₂O₃ = $\frac{mass}{molar mass}$

Molar mass of Al₂O₃ = 2(27) + 3(16) = 102g/mol

Number of moles = $\frac{1020}{102}$ = 10mol

From the balanced equation:

2 moles of Al₂O₃ produced 4 moles of Al

10 moles of Al will produce $\frac{4 x 10}{2}$ = 20moles of Al

Mass of Al = number of moles of Al x molar mass of Al = 20 x 27 = 540g

Learn more:

Number of moles brainly.com/question/13064292

#learnwithBrainly

8 0

3 years ago

Which of the following is the correct model of C6H14?

pav-90 [236]

Answer:

A. B. C.D.-allnswers 4 answers

3 0

3 years ago

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Why melting and boiling points can be used as a way to check purity?

jekas [21]

Answer: Let's see why

Pure solid and liquid compounds possess sharp melting and boiling points. Therefore, melting and boiling points of a compound can be used as a criteria of purity. ... Sometimes during cooling minute quantity of the substance (solid which is being purified) is added to the solution to facilitate the initial crystallisation.

Explanation:

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3 years ago

What type of element is Hydrogen? Where do you see hydrogen present?

PSYCHO15rus [73]

/~\ The correct answer is:

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Hydrogen is a chemical and is found in the sun and most of the stars, and the planet Jupiter is composed mostly of hydrogen. On Earth, hydrogen is found in the greatest quantities as water.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

I hope this helps! /~\

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3 years ago

Which star is most like the sun

Darina [25.2K]

Answer:

Tau ceti

Explanation:

it's the closest next to the sun

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3 years ago