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klio [65]
3 years ago
10

What organ is known as the windpipe and the tube takes in air ?

Chemistry
2 answers:
maks197457 [2]3 years ago
7 0

Answer:

The trachea, commonly known as the windpipe, is a tube about 4 inches long and less than an inch in diameter in most people. The trachea begins just under the larynx (voice box) and runs down behind the breastbone (sternum).

Explanation:

kirill [66]3 years ago
3 0
The Trachea. Hope it helps
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Mountain ranges are the result of many different
Effectus [21]

Answer:

Mountain ranges are formed by a variety of geological processes, but most of the significant ones on Earth are the result of plate tectonics. Mountain ranges are also found on many planetary mass objects in the Solar System and are likely a feature of most terrestrial planets.

7 0
3 years ago
Read 2 more answers
Which element has the greatest density at STP?
son4ous [18]

Answer: Option (4) is the correct answer.

Explanation:

It is known that density is mass divided by volume.

Mathematically,       Density = \frac{mass}{volume}

Since, density is directly proportional to mass. So, more is the mass of an element more will be its density.

Mass of magnesium is 24.305 g/mol.

Mass of barium is 137.327 g/mol.

Mass of beryllium is 9.012 g/mol

Mass of radium is  226 g/mol.

Hence, radium has more mass therefore it will have the greatest density at STP.

8 0
3 years ago
Is buoyancy a physical or chemical property?
gizmo_the_mogwai [7]
Buoyancy is considered a physical property. It is a type of physical property because it is related to the density and weight of the item, which are both physical.
7 0
3 years ago
How many moles of fe2o3 will be produced from 18.0 g of fe assuming o2 is available in excess
Advocard [28]

Answer:

0.161moles

Explanation:

Given parameters:

Mass of Fe  = 18g

Oxygen gas is in excess

Unknown:

Number of moles of Fe₂O₃ produced  = ?

Solution:

To start with, let us write a chemically balanced equation before proceeding to understand the nuances of this problem.

              4Fe       +    3O₂       →          2Fe₂O₃

In the equation above above, 4 mole of iron combined with 3 moles of oxygen gas to  2 moles of Fe₂O₃.

In solving this problem, we can identify that Fe is the limiting reactant since we have been told oxygen gas is in excess. The suggests that the extent to which the product is formed and the reaction proceeds hinges on the amount of Fe we have.

It is best to work from the given, or known reactant to the unknown

The known in this scenario is the mass of Fe. Let us find the number of moles of this specie;

        Number of moles of Fe  = \frac{mass}{molar mass}

              Molar mass of Fe  = 56g/mol

      Number of moles  = \frac{18}{56}   = 0.32mol

Using this known number of moles of Fe, we can relate it to that of the unknown amount of the product and obtain the number of moles.

           4 moles of Fe produced 2 moles of Fe₂O₃

         0.32 moles of Fe will produce \frac{0.32 x 2}{4}   =  0.161moles

8 0
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To which group of biochemicals do steroids belong?
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