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3 years ago

Which of the following answers is NOT correct with regard to convection currents?

Biology

1 answer:

coldgirl [10]3 years ago

6 0

Answer: C....Convection currents play a role in the movement of Earth’s inner core

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what type of speciation occurs when a plant population becomes reproductively isolated while living with its parents population?

djverab [1.8K]

This type of speciation is called Peripatric Speciation. Peripatric speciation gives rise to daughter species that becomes reproductively isolated. Parent and daughter species are usually adjacent to each other but did not overlap. There are two requirements for this kind of speciation, geographic space and time.

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4 years ago

Help me please! I had forgotten what key terms mean please if anyone can shed me some light I would greatly appreciate it!

Alika [10]

Key terms- a word that serves as the meaning of another word

I hope this helped!

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3 years ago

Which layer of the alimentary canal is exposed to the food we eat and ingest?

ololo11 [35]

The correct answer is: mucosa

The alimentary canal or gastrointestinal tract consist of four layers: mucosa, submucosa, muscular layer and serosa.

Mucosa is the layer that surrounds the lumen, so it is exposed to the food . Mucosa is composed of epithelium (active in absorptive and secretory processes), lamina propria (connective tissue) and muscularis mucosa (peristaltic movement).

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3 years ago

Although plants and animals are different from one another, they also...?

madreJ [45]

Although plants and animals are different from one another, they also share some common characteristics.

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3 years ago

Balanced equation for Fe+O2 ->Fe2O3

NeX [460]

<h2>Hello!</h2>

The answer is:

The balanced equation is:

$4Fe+3O_2=2Fe_{2}O_{3}$

Finding a balanced equation of a reaction means making equal the number of atoms for both reactants and products sides, according to the conservation mass law, the mass is always conserved, so, we need to make both quantities of atoms/molecules match.

So, we are given the following reaction:

$Fe+O_2=Fe_{2}O_{3}$

For the reactants, we have 1 molecule of Fe and 2 of O

For the products, we have 2 molecules of Fe and 3 of O

So, balancing the Oxygen, we have:

$Fe+3*O_2=Fe_{2}O_{3}$

$Fe+3O_2=Fe_{2}O_{3}$

Now, there are 6 atoms of oxygen in the reactant, let's multiply the product by 2 in order to make both sides match, so:

$Fe+3O_2=2*(Fe_{2}O_{3})$

$Fe+3O_2=2(Fe_{2}O_{3})$

Now, we can see that there are 6 atoms of Oxygen in both sides, but there are 4 atoms of Fe in the products and just 1 atom in the reactants, so, we need to multiply the Fe by 4.

So, balancing the Iron (Fe) we have:

$4*Fe+3O_2=2(Fe_{2}O_{3})$

$4Fe+3O_2=2Fe_{2}O_{3}$

Hence, we can see that we now have the same number of atoms on both sides, we have:

$Fe_{reactants}=4\\O_{reactants}=6\\Fe_{products}=4\\O_{products}=6$

Therefore, the equation is balanced.

$4Fe+3O_2=2Fe_{2}O_{3}$

Have a nice day!

5 0

3 years ago