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inessss [21]
2 years ago
14

Why is it important to inhale through your nose?

Chemistry
1 answer:
Ksju [112]2 years ago
7 0
Hi there! Your mouth can take in oxygen, so A is out. Your nose cleans the air you breathe, and gets rid of foreign particles (dust, pollen, etc), which is why you sneeze to get those things out. Breaking down oxygen doesn’t make any sense. The answer is B.
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A)Completaţi ecuaţiile chimice următoare cu formulele chimice şi coeficienţii adecvaţi:
Scilla [17]

Answer:co2

Explanation:because of the oxygen levels

6 0
3 years ago
Below is the Lewis structure of the hydrogen cyanide molecule.
lianna [129]

Answer :

The number of bonding pairs of electrons around the hydrogen atom = 2

The number of lone pairs of electrons around the hydrogen atom = 0

Explanation :

Lewis-dot structure : It shows the bonding between the atoms of a molecule and it also shows the unpaired electrons present in the molecule.

In the Lewis-dot structure the valance electrons are shown by 'dot'.

The given molecule is, HCN

As we know that carbon has '4' valence electrons, hydrogen has '1' valence electrons and nitrogen has '5' valence electrons.

Therefore, the total number of valence electrons in HCN = 1 + 4 + 5 = 10

According to Lewis-dot structure we conclude that, there are 8 number of bonding electrons and 2 number of non-bonding electrons.

The number of bonding pairs of electrons around the hydrogen atom = 2

The number of lone pairs of electrons around the hydrogen atom = 0

8 0
3 years ago
How long is a red blood cell
Lera25 [3.4K]
I suspect this question should read "How long does a red blood cell live." A red blood cell lives for between 100 and 120 days. It takes 7 days for a new red blood cell to develop from stem cells. Stem cells are similar to base cells. They can also be seen as a general template from which specialized cells are made. Stem cells can be taken from a newborn baby's umbilical chord or extracted from an adult blood donor's blood.This 
7 0
3 years ago
Rank the types of visible light in order from longest to shortest wavelength?
inysia [295]
Red
Orange
Yellow
Green
Blue
Indigo
Violet

Red being the longest
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7 0
2 years ago
Explain why it is not a good idea to throw an aerosol can into a fire. Which gas law applies?
Helga [31]
The gas inside the can and the can’s volume are both constant.
The gas pressure increases with increasing temperature.
The can will burst if the pressure becomes great enough.
The gas law that applies is Gay-Lussac’s law.
5 0
3 years ago
Read 2 more answers
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