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
mihalych1998 [28]
3 years ago
9

Name two types of substances that do not contain molecules with covalent bonds

Biology
2 answers:
nataly862011 [7]3 years ago
8 0

<span>The answers are the substances found in the simple compounds of Hydrogen</span><span>, ammonia, methane and water and when they will undergo melting or boiling, there are weak 'intermolecular forces' that break them which is the reason why it is not a strong covalent bond.</span>

lukranit [14]3 years ago
7 0
<h3><u>Answer;</u></h3>

Ionic substances

Single atoms

<h3><u>Explanation;</u></h3>
  • <em><u>The two substances that do not contain molecules with covalent bonds are ionic substances and single atoms.</u></em>
  • <em><u>Ionic substances are those substances that are formed as a result of transfer of electrons from one atom to another, resulting to formation of ions or stable ions. </u></em>Examples of such ions are sodium chloride, potassium iodide, etc. These compounds do not have molecules with covalent bonds.
  • <em><u>Single atoms on the other hand do not have molecules with covalent bond since they exist as an atom and not as a molecule.</u></em> They include elements such as magnesium, sodium,potassium, etc.
You might be interested in
Which of the following is a system of organs that collects oxygen from the external environment and transports it to the bloodst
ehidna [41]

Answer:D

Explanation:

Respiration is the process of taking in oxygen and release of Carbondioxide in the lungs(breathing),the absorption of the oxygen in the alveolar, into the blood stream for distribution to tissues , the combustion of the metabolites(glucose,amino acids, and fatty acids and glycerol)with the inhaled oxygen to give energy as ATPS and water vapour.

4 0
4 years ago
Which of the following coordinate and control immune response?
qwelly [4]
I think it’s T lymphocytes?
It says: T lymphocytes attack antigens directly and help control the immune response. They also release chemicals, which control the entire immune system....
5 0
3 years ago
Read 2 more answers
How did the milk in the baby bottles disappear?
laiz [17]

There is a place in the lid where the fluid rushes to when you tip it, leaving the air bubbles in the cylinder of the bottle. In some companies it's a chemical inside the fluid that can evaporate over time and looses it's " magic" effect.

3 0
3 years ago
Match the following: A) Smooth muscle B) Skin epidermis C) Tendon D) Cardiac muscle 17) Derived from mesenchyme. ___________ 18)
Stolb23 [73]

1.  

17) Derived from mesenchyme. C) Tendon  

Tendon is fibrous connective tissue (made of collagen) that connects muscle to bone.

18) Has a surface to which nothing is attached B) Skin epidermis.  

Epidermis is one of the three skin layers (other two are dermis and hypodermis) of skin that provides a barrier to infection from environmental pathogens.

9) Moves blood through the body. D) Cardiac muscle  

Cardiac muscle is found in heart which pumps blood through the whole body.

20) Moves food through the GI tract. A) Smooth muscle  

Motility through the GI tract is achieved by the contractions of ring smooth muscles (peristalsis).

2.  

21) Smooth muscle. B) Moderate regenerative ability.  

Cells called pericytes are cells that can regenerate smooth muscle cells. Also, smooth muscle cells themselves retain the ability to divide and thus regenerate (increase their own number).

22) Skeletal muscle C) Weak regenerative ability

Skeletal muscle contain  'satellite cells'-stem cells that have the ability to regenerate and repair the damaged fibres.  

23) Cardiac muscle A) Virtually no functional regenerative ability.  

When the cell of cardiac muscle-cardiac muscle cells die, they are not replaced.

24) Areolar connective tissue. D) Regenerates extremely well

Areolar connective tissue is loose connective tissue that hold organs in place. Fibroblasts are cells widely dispersed in this tissue

25) Tendons and ligaments. B) Moderate regenerative ability  

Healing or regeneration of ligaments and tendons can come from the surrounding soft tissues ("extrinsic healing"), or from the ligament /tendon itself ("intrinsic healing").

6 0
4 years ago
The cell walls of bacteria are responsible for the shape of the bacteria and the difference in the gram stain reaction.
geniusboy [140]
The answer is true
hope this helps:)
3 0
3 years ago
Other questions:
  • Paraphrase four safety practices you should always use when you begin scientific inquiry
    5·1 answer
  • The earth is estimated to be how much years old
    5·2 answers
  • The study of a the human brain and behavior
    7·2 answers
  • One possible reason why polar bears might not be able to survive if the environment they live in changes is because
    7·1 answer
  • Which of the following best describes how most scientists think humans evolved?
    11·2 answers
  • What is the main force that drives the part of the water cycle that that the student observed?
    5·1 answer
  • True or False and Archimedes screw was initially used to move people. Pls hurry
    6·2 answers
  • Explain how these competitors are benefiting from the SAA strike​
    9·1 answer
  • As the temperature of a liquid goes up, the average speed of its particles blank
    9·1 answer
  • • In your own words, discuss the role of each of the following structures in the whole process: cell membrane, vesicles (at two
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!