Answer:
A = water is an excellent solvent.
Explanation:
What is solvent:
Solvent is the that part of solution which is present in large proportion and have ability to dissolve the solute.
Explanation:
In simplest form solvent is something in which other substance get dissolve. The most widely used solvent is water, other examples are toluene, acetone, ethanol, chloroform etc.
Water is called universal solvent because of high polarity all polar substance are dissolve in it. Hydrogen is less electronegative while oxygen is more electronegative and because of difference in electronegativity hydrogen carry the partial positive charge while oxygen carry partial negative charge.
Water create electrostatic interaction with other polar molecules. The negative end of water attract the positive end of polar molecules and positive end of water attract negative end of polar substance and in this way polar substance get dissolve in it.
Example:
The minerals and nutrients in our body dissolved in water and transported through out the body.
<span>1. It creates a pressure gradient when it contracts by increasing the volume of the lungs, which decreases the pressure in the lungs.
Looking at the ideal gas equation, you can conclude that volume is inversely related to the pressure. Increasing volume of lungs will result in a decrease in the pressure of the lungs.
2. When the pressure in the lungs, or the intrapulmonary pressure, falls below atmospheric pressure, air enters the lungs via inspiration.
If the lungs pressure keeps decreasing, eventually it will fall below the atmospheric pressure. Air moves from higher pressure into the lower pressure area. This will cause the air outside come inside the lungs. The event is called inspiration.
3. During forced inspiration, other muscles called external intercostals assist in the process.
Other than </span>the diaphragm,<span> the external intercostals could also assist in the inspiration. External intercostals will expand the chest outward, while the diaphragm pulls the lung. Both of them will cause decreased pressure in the lungs.
4. The process of expiration is largely passive due to the lungs’ elastic recoil.
Unlike the inspiration, expiration is mostly passive. The chest wall is made of ribs that connected with elastic connective tissue. The tissue is stretched at inspiration and when then muscle that causes inspiration relax, the connective tissue elastic force will press the chest wall.
5. This causes the volume of the lungs to decrease, which increases intrapulmonary pressure.
The pressure from the elastic tissue causing the lungs shrink. As the volume is inversely related to the pressure, the decreased volume will result in increased pressure.
6. When intrapulmonary pressure is higher than atmospheric pressure, expiration occurs.
The pressure of the lungs keep increases and eventually, it reaches a point where the pressure is higher than the atmospheric pressure.
</span>Air moves from higher pressure into the lower pressure area so the air inside the lungs will be forced to flow outside. The event is called expiration.<span>
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Answer:
Write a lab report that summarizes his experiment