What is the definition of carbohydrates
2 answers:
Answer and Explanation:
Carbohydrates are a type of biomolecule that the body uses primarily for energy and/or structure. They usually consist of the elements carbon (C), hydrogen (H), and oxygen (O) in a 1 : 2 : 1 ratio. For example, glucose, a carbohydrate, is .
Monomers of carbohydrates are called monosaccharides, and polymers are called disaccharides if two monosaccharides are combined and polysaccharides if more than two monosaccharides are put together.
Examples of carbohydrates are sugars, starches, cellulose, lactose, sucrose, etc.
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6.52 × 10⁴ L. (3 sig. fig.)
<h3>Explanation</h3>Helium is a noble gas. The interaction between two helium molecules is rather weak, which makes the gas rather "ideal."
Consider the ideal gas law:
,
where
is the pressure of the gas,
is the volume of the gas,
is the number of gas particles in the gas,
is the ideal gas constant, and
is the absolute temperature of the gas in degrees Kelvins.
The question is asking for the final volume of the gas. Rearrange the ideal gas equation for volume:
.
Both the temperature of the gas, , and the pressure on the gas changed in this process. To find the new volume of the gas, change one variable at a time.
Start with the absolute temperature of the gas:
,
.
The volume of the gas is proportional to its temperature if both and
stay constant.
- consider
.
Now, keep the temperature at and change the pressure on the gas:
,
.
The volume of the gas is proportional to the reciprocal of its absolute temperature if both
and
stays constant. In other words,
(3 sig. fig. as in the question.).
See if you get the same result if you hold constant, change
, and then move on to change
.