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
san4es73 [151]
3 years ago
12

What term refers to the coldest and densest zone, deep below the surface of a lake?

Chemistry
2 answers:
uranmaximum [27]3 years ago
5 0
Profundal 

profundal zone is the coldest and deepest zone 
goblinko [34]3 years ago
3 0

Answer: Hypolimnion

Explanation:

The hypolimnion layer is found in the dense region of lake. It is bottom layer of water in a thermally stratified lake.

This region has lowest oxygen concentration,and it lies below the thermocline.

It is the deepest and coldest layer found in lake. It has very less oxygen and maximum amount of sediments is also found there.

There reaches no light so photosynthesis id not possible there. The temperature there is almost 4 °C throughout the year.

You might be interested in
Explain why seeing a gas doesn not always indicate that there was a chemical change. ​
Orlov [11]
A change of state (which is a physical change) can cause gas.
7 0
3 years ago
Carbon-12 contains 6 protons and 6 neutrons. The radius of the nucleus is approximately 2.7 fm (femtometers) and the radius of t
Slav-nsk [51]

Explanation:

Let us assume that volumes is equal to spheres  volume of nucleus.

fm = femto meter = 10^{-15}

pm = pico meter = 10^{-12}

Hence, calculate the volume as follows.

          V = \frac{4}{3} \times \pi \times r^{3}

              = \frac{4}{3} \times 3.14 \times (2.7)^{3}

              = 82.4481 fm^{3} (cubic femtometers)

or,          = 82 fm^{3}

Now, we will calculate the volume of the atom as follows.

          V = \frac{4}{3} \times \pi \times r^{3}

             = \frac{4}{3} \times 3.14 \times (70)^{3}

             = 1436758.4 pm^{3} (cubic picometers)

thus, we can conclude that volume of the nucleus is 82 fm^{3}  and volume of the atom is 1436758.4 pm^{3}.

7 0
3 years ago
The explosions that take place during a fireworks show are an example of which of the following?Image of fireworks exploding in
babymother [125]
Chemical change
:)
hope this helps
4 0
3 years ago
Read 2 more answers
What dose the saying Stars must die for others to be born mean
Orlov [11]

Answer:

-> there isnt an exact answer

Explanation:

stars have a cycle of life, like humans and other organisms. when they are dying they may get hotter or bigger. they will become red giants, and may explode.. kinds like the big bang theory. it will leave a small white dwarf star behind, about the size of earth, and it is super hot. the stars contain dark matter which will be spewed into the galaxy planting a path for future stars

I reccomend searching google for an exact answer

3 0
3 years ago
What are valence electrons ?
Arada [10]

Answer:In chemistry, a valence electron is an outer shell electron that is associated with an atom, and that can participate in the formation of a chemical bond if the outer shell is not closed; in a single covalent bond, both atoms in the bond contribute one valence electron in order to form a shared pair.

Explanation: hope this helped

8 0
3 years ago
Other questions:
  • 5 mL of ethanol has a mass of 3.9 grams and 5.0 mL of benzene has a mass of 4.4 grams,
    11·1 answer
  • The voltage generated by the zinc concentration cell described by the line notation Zn ( s ) ∣ ∣ Zn 2 + ( aq , 0.100 M ) ∥ ∥ Zn
    5·1 answer
  • Calculate the mass (in g) of 2.1×1024 atoms of w. Calculate the mass (in ) of atoms of . 1.5 ×102g 3.9×102g 2.4 ×102g 6.4 ×102g
    15·1 answer
  • During the time period than an El Nino is occurring, there is a buildup of cold water of the west coast of South America there i
    15·1 answer
  • Hey everyone I’m new here so so can you give me some tips about Brainly?
    12·2 answers
  • If you decreased the volume of a sample of gas by a factor of three while maintaining a constant
    11·2 answers
  • Determine the atomic number, atomic mass and element name of the following:
    13·1 answer
  • Find the mass in kilograms of the liquid air that is required to produce 600L of oxygen. In normal condition, 1L of liquid air h
    6·2 answers
  • Based on this information, do you think that the mole should be considered a base unit in the Sl system? Explain why or why not.
    5·1 answer
  • Explain why molten sodium chloride conducts electricity,but solid sodium chloride does not​
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!