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
Pachacha [2.7K]
3 years ago
13

2. The best way to determine if you are using a halogenated solvent is to:

Biology
1 answer:
goldfiish [28.3K]3 years ago
8 0
The best way to determine the presence of halogens is by adding a silver nitrate solution to the solvent. This is because all halogens, except for fluorine, produce a precipitate with silver nitrate solution.Chlorine produces a white precipitate, bromine produces a pale cream colored precipitate and iodine produces a yellow colored precipitate.
If further testing is required, concentrated sulfuric acid may be added. The sulfuric acid will produce misty fumes with fluorine and chlorine, brown fumes with bromine and purple fumes with iodine.

hope this helped :)
alisa202
You might be interested in
A elephant cell has 20 chromosomes. how many chromosomes will the cell have just before mitosis begins in the elephant cell?
lora16 [44]

The elephant cell will have 20 chromosomes.

Cells undergo interphase before getting to the mitotic phase. At the S phase of the interphase, the amount of DNA in the cell is double by replication. However, the number of chromosomes remains intact.

Thus, the cell gets to the mitotic phase with the same number of chromosomes that is usually present in normal vegetative cells of the animal.

More about mitosis can be found here: brainly.com/question/13536882?referrer=searchResults

8 0
2 years ago
In diabetic patients, what molecule is missing in the transport system
Oksanka [162]
The answer to this question would be: insulin

Insulin is a hormone that produced by the pancreas. Insulin makes sugar go inside cells. Sugar is the food for cells. Without insulin, the sugar can't enter the cell and the cell food is depleted. This will cause the body feel that the sugar is not enough and trying to increase the sugar concentration. This will result in the increases of blood sugar level.
7 0
3 years ago
Hey y'all I need help with this bio question: what are the pros and cons of different skin tones in different parts of the world
d1i1m1o1n [39]
Oh this one is so cool!

It basically all boils down to Vitamin D! We need this essential vitamin to help our body build hormones and regulate calcium. Our bodies make Vitamin D when we are exposed to the UV rays found in sunlight. But as we all know, too much sunlight isn’t good because these UV rays can harm us. Melanin (the chemical that our bodies produce to darken skin tone and hair color) provides protection from UV rays by absorbing them. However, this means that the more melanin that is produced by someone’s body results in less absorption of UV rays and a decrease in Vitamin D production. But for someone living around the equator or in the tropics that doesn’t matter because there’s lots of sun all the time. So for humans living in these areas where there’s lots of sunlight year round, it’s beneficial to have darker skin to protect from the harm of UV rays. People living in these areas still get plenty of Vitamin D though because of that year round sunshine.

Now what about those who’s skin has less melanin, such as those found in the higher latitudes? Well with less sunlight year round, their bodies had to adapt to be able to get enough Vitamin D. So less melanin is produced by the body in order to absorb the lesser amounts of UV rays to make Vitamin D. Lighter skin is, therefore, more beneficial the farther away you go from the tropics.

So essentially:
Pro of Darker Skin tones
-Protection from harmful UV rays

Con of Darker Skin tones
-Less absorption of UV rays and less production of Vitamin D

Pro of Lighter Skin tones
-Greater absorption of UV rays and more Vitamin D production

Con of Lighter Skin tones
-Less protection from harmful UV rays (resulting in sunburns and, in extreme cases, skin cancer)

This is of course the biology answer. The social impacts of different skin tones is a whole different story that you can ask in the history section.
6 0
2 years ago
Your Hot Wheels car travels 120 cm in 1.34 seconds. What is its SPEED?
vladimir2022 [97]

Answer:

c) 89.55 cm/s

Explanation:

in this situation you have to divide to find the speed-

120/1.34 = 89.55223880...

closest answer is c

or rounded

89.55

hope this helps.

7 0
3 years ago
Pls help me with all these questions pls i will heart u and give u brainliest ​
Lady_Fox [76]

Answer: right bottom is kidney

Left bottom is liver

Q. 4 part a, The excretory system.

B, kidney: The kidneys make urine by filtering wastes and extra water from blood. Urine travels from the kidneys through two thin tubes called ureters and fills the bladder.

And Q. 5 order, 3, 2, 1, 4.

Explanation:

6 0
3 years ago
Read 2 more answers
Other questions:
  • Please help!!What most likely happens when water loses heat?
    13·2 answers
  • The interstitial endocrine cells that produce testosterone are located ________.
    14·1 answer
  • An injury to the olecranon would most likely cause pain and disuse of which joint?
    13·2 answers
  • How much energy is stored per energy level
    9·2 answers
  •  This is the simplest type of joint, found in your elbows, knees, fingers, and toes. It allows movement in only one direction. I
    8·2 answers
  • What do you think is the difference between poison and venom? Explain
    11·1 answer
  • The children in a middle school classroom are all exposed to chicken pox one week. Among these students are John, who had chicke
    13·2 answers
  • Please help its 6th grade science
    7·1 answer
  • In a tube filled with water, the pressure is ____ at the top and at the bottom
    6·1 answer
  • When we ran the serum of a patient who seems to be severely ill with arthritis at the lowest dilution suggested by the latex agg
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!