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nadezda [96]
3 years ago
8

In a laboratory experiment, John uses a mesh to separate soil particles from water. Which technique of separation is he using? c

hromatography distillation filtration fragmentation condensation
Chemistry
2 answers:
Tom [10]3 years ago
4 0
Filtration, he used a mesh to filter out the stuff
anyanavicka [17]3 years ago
4 0

Answer: Option (c) is the correct answer.

Explanation:

A mesh is a kind of net like structure generally used for the purpose of filtration.

Distillation is defined as the method used to separate two liquids with a difference of less than or around 25^{o}C in their boiling point.  

So, a liquid with low boiling point will evaporate and its vapors can be collected in a separate container.

Chromatography is defined as a method for separating a mixture by passing it in a solution with the help of a medium where the components of the mixture travel at different rates.

And, filtration is a method used to separate a solid from a liquid by passing through a porous barrier. The solid remain stick to the barrier and liquid passes through the barrier.

A method in which a solid substance is broken down into different parts or fragments is known as fragmentation.

Condensation is a process is in which vapor phase of a substance changes into liquid phase.

Thus, we can conclude that in the given situation John is using the technique of filtration.

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What is the different things that we have and animals?
Katen [24]

Answer:

the different things that we have and animals are.:

  1. to gain emotional support.
  2. it acts as a real friend.
  3. for meat,flesh,milk and milk products, wool,etc.
  4. for transportation like horse
  5. to enjoy and play like with dolphins
4 0
3 years ago
Draw and label the structure of a sodium atom showing the distribution of electrons​
Korolek [52]

Answer:

  • Please, find the drawing in the picture attached.

Explanation:

A simple model or drawing of the structure of an atom may be performed showing the electrons on the different energy levels (shells), plus the nucleons (protons and neutrons).

Then, you need the information on:

  • number of protons (atomic number)
  • electron configuration
  • number of neutrons

The first step is  to find the atomic number of the atom. You find that information in the periodic table, where the elements are show with their chemical symbol.

The chemical symbol of sodium is Na. It is located in the group (colum) 1 and period (raw) 3. There you find that the atomic number is 11. Hence your drawing must show 11 protons.

Since the atom is neutral, the number of electrons is also 11. So, you must place the electrons in the following energy levels or shells:

Main energy level      shell   number of electrons

n = 1                              K         2 (this is the maximum in this level)

n= 2                              L          8 (this is the maximun in this level)

n= 3                              M         1 (the maximum in this level is 18)

Now that you have the number of protons and the location of the electrons, you must determine the number of neutrons.

In the periodict table you will also find the atomic mass of the elements. The atomic mass of sodium is 22.990 amu. That means that most sodium atoms have mass number (number of protons plus neutrons) 23. Some isotopes will have less neutrons, but you can draw your model using the most typical isotope with 23 nucleons. This means, that the number of neutrons is 23 nucleons - 11 protons = 12 neutrons.

8 0
3 years ago
At a high concentration do you have more or less particles per unit volume
Whitepunk [10]

Answer:

More particles per unit volume

Explanation:

Concentration means the amount of solute in a solution. Now, the amount of solute also means the number of particles of solute present in a solution.

Hence, when we use the term "high concentration", we imply that the amount of solute present or the number of particles present in a solution is high.

Thus, at high concentration, there are more solute particles than solvent particles in a solution.

3 0
2 years ago
True or False: The closer the particles pack together, the less permeable<br> the soil is *
MArishka [77]

Answer:

True

Explanation:

Tighter particle compaction means less movement between particles for other substances to move through

permeable

(of a material or membrane) allowing liquids or gases to pass through it.

7 0
3 years ago
Which of the following elements can only form single covalent bonds when forming molecular compounds?
Anna007 [38]
B. Since Hydrogen only has one electron, it can only form a single bond.
3 0
3 years ago
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