1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
yuradex [85]
3 years ago
11

Placing a suspect at the scene of a crime is an important element in criminal investigation. This can be achieved through the lo

cation of textile fibers similar to those from the victim's clothing or the crime scene on the clothing of the suspect, or through the discovery of fibers like those in the suspect's clothing at the crime scene. A fiber is the smallest unit of a textile material that has a length many times greater than its diameter. Fibers can occur naturally as plant and animal fibers, but they can also be man-made. A crime scene victim is wearing running shorts. There are some fibers on the victim's legs below the shorts. The fibers on the victim's legs dissolved in hydrochloric acid and so did the fibers that made up her running shorts. The fibers are A) cotton. B) nylon. C) silk. D) wool.
Chemistry
1 answer:
r-ruslan [8.4K]3 years ago
3 0

Answer:A) cotton

A fiber if available in trace or appropriate amount can link a suspect to a crime.Solubility is a preliminary test performed for identification of the type of fiber. In this method small amount of fiber evidence is dissolved in the suitable solvent to identify it's type. Some fibers completely get solublize in the solvent, some get partially soluble and other can only change their color or do not dissolve at all.

According to the given situation, the fiber dissolved in hydrochloric acid can be cotton. As the fibers of cotton are soft and slender and will get easily solubilize in hydrochloric acid.

You might be interested in
Describe how the introduction of a new Predator can cause a species
Alexus [3.1K]
When a female animal and a male see each other the male would show off and they woulf matr and make a baby then the babys will grow up and make more
5 0
3 years ago
Acetone (nail polish remover) has a density of 0.7857 g >cm3.
Stella [2.4K]

If acetone has a density of 0.7857 \frac{g}{cm^{3} }  the mass in grams of point A is 22.4 g and the volume at point B is 8.32 mL.

<h3>What is acetone?</h3>

Acetone is known as a chemical substance that is usually found in the environment but can also be produced artificially. Acetone is a polar organic product that interacts very well with water molecules, generating dipole-dipole relationships.It is colorless with a distinctive smell and taste, we find it in products known as <u>cleaning and personal care products</u>, but we can also use it as a solvent for substances.

Also in the environment in <u>plants, trees and in volcano emissions or in forest fires</u>, it does not become <em>toxic</em> in low doses but if it is exposed to an individual in high doses it can become <em>fatal</em>.

In the statement we can find that acetone has a density of 0.7857 \frac{g}{cm^{3} }.

Therefore, we can confirm that if acetone has a density of 0.7857 \frac{g}{cm^{3} }  the mass in grams of point A is 22.4 g and the volume at point B is 8.32 mL.

To learn more about acetone visit: brainly.com/question/13334667?referrer=searchResults

#SPJ1

7 0
2 years ago
Explain where you would find the three different types of muscles (cardiac, smooth and skeletal) and how these different types o
yawa3891 [41]

Explanation: Skeletal muscle, attached to bones, is responsible for skeletal movements. The peripheral portion of the central nervous system (CNS) controls the skeletal muscles. Thus, these muscles are under conscious, or voluntary, control. The basic unit is the muscle fiber with many nuclei. These muscle fibers are striated (having transverse streaks) and each acts independently of neighboring muscle fibers.

4 0
3 years ago
How did the first DNA formed
blsea [12.9K]
Experiments suggest that organic molecules could have been synthesized in the atmosphere of early Earth and rained down into the oceans. RNA and DNA molecules — the genetic material for all life — are just long chains of simple nucleotides. Replicating molecules evolved and began to undergo natural selection.
6 0
3 years ago
Read 2 more answers
What are the steps used to write ionic formulas for ionic compounds
lorasvet [3.4K]
Write the symbols for the cation and the anion: Mg and Cl. Determine the charge on the cation and anion. If the cation has a Roman numeral after it, that is the charge on that cation. Cations receive Roman numerals when they can take more than one ionicform.

periodical table and write caculatoin numbers
6 0
3 years ago
Other questions:
  • Compare and contrast the uses of the iron triad and the use of the coinage metals
    8·1 answer
  • A solution contains 50.0g of heptane (C7H16)and 50.0g of octane (C8H18) at 25 degrees C.The vapor pressures of pure heptane and
    10·1 answer
  • if 150g of aluminum react with 101g of sulfuric acid what is the maximum amount of hydrogen gas that can be produced
    6·1 answer
  • One success of Johann Döbereiner's law of triads was that it organized most of the known elements into three-element groups base
    12·2 answers
  • Why is it logical to assume that they hydrogen ion concentration in an aqueous solution of a strong monoproctic acid equals the
    10·1 answer
  • . A mixture of methane and air is capable of being ignited only if the mole percent of methane is between 5% and 15%. A mixture
    13·1 answer
  • How many atoms of S are there?
    5·2 answers
  • PLEASE HELP!!!!!!!!!!!!!!!!!!!!!! DUE TOMORROW 40 POINTS!!!!!!!!!!!!!!!!!!
    8·2 answers
  • Who arranged the elements according to atomic mass, and used the arrangement to predict the properties of missing elements.
    13·2 answers
  • How is phosphorylation of glyceraldehyde 3-phosphate in the payment phase of glycolysis different from phosphorylation of glucos
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!