a) explain covalent bond and hydrogen bond with an example of each (4marks)
b)state three(s) importance of surface tension and example( 6marks)​

Answers

Answer 1

Answer:

Covalent bond is a primary chemical bond formed by the sharing of electron pairs. Covalent bonds are strong bonds with greater bond energy. Hydrogen bond is a weak electrostatic attraction between the hydrogen and an electronegative atom


Related Questions

what is adaptation give any four characters of aquatic plants​

Answers

Explanation:

Animals have special features that help them to live in a particular place. Therefore this features is called adaptation.

1] Aquatic plants have leaves that float on the surface of water.

2] Thier leaves are rarely have stomata.

3] Thier leaves can perform all the work without xylem.

4] They are usually lack cuticle layer in order to avoid excessive dryness.

Answer:

The most common adaptation is the presence of lightweight internal packing cells, aerenchyma, but floating leaves and finely dissected leaves are also common. Aquatic plants can only grow in water or in soil that is frequently saturated with water.

Four characters of aquatic plants are as given below:

1) most aquatic plants donot need culticles or have thin culticles as cuticles prevent loss of water.

2) aquatic plants keep their stomata always open for they do not need to retain water.

3) on each side of their leaves are a number of stomata.

4) aquatic plants have less rigid structure since water pressure supports them.

Explanation:

I hope this answer help you.

in some plants pink flowers are dominant over yellow flowers if Mario crosses two hybrids what happens

Answers

75% pink 25% yellow

Why did the White House experience water damage ?

1.
It is made of granite which is strong.

2. It is made of sandstone which is very porous and is easily penetrated by rainwater

3. It is made of non-porous sedimentary rock

Answers

The White House building is made of sandstone which is very porous as a result water is easily penetrated inside it which causes damage and make the walls of building weak.

The White House is made of gray-colored sandstone that is brought from quarry in Aquia, Virginia. The north and south porticos of white house building are constructed with red Seneca sandstone brought from Maryland. These sandstones are porous in which rainwater is easily penetrated in it that cause damage to the white house building so it is concluded that the building is made of porous sandstone.

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When neuroscientists employ the term "nucleus", they are usually referring to:_____.
​a. a cluster of glial cells in the dorsal-medial CNS.
​b. a neural unit composed of anatomically and functionally related neurons.
​c. a group of homologous ganglia located either in the cortex or in the cerebellum.
​d. cognitively synchronized clusters of apical dendrites anywhere in the PNS.

Answers

Answer:

B. A neural unit composed of anatomically and functionally related neurons.

Is the scorpion vertebrate ? ​

Answers

Answer:

scorpions are invertebrates but are insects

Answer:

A animal that is an vertebrate has a spine, and backbone. Some of these animals can be humans, dogs, cats, etc. But most 6 legged creatures, 8 legged creatures do not have a backbone.

To answer your question, no, scorpions are not vertebrates because they do not a spine and backbone.

what evidence shows that biological molecules on earth form naturally?

Answers

Explanation:

La siguiente entrada tiene como objetivo realizar una breve explicación sobre las moléculas biológicas  lipídos y carbohidratos, las cuales son muy diversas ya que están formadas por carbono, lo cual hace que puedan formar muchos tipos de enlaces. Esta capacidad permite que las moléculas orgánicas  adopten muchas formas complejas, como son las cadenas, las ramificaciones y los anillos.

Las moléculas biológicas son grandes polímeros que sintetizas para poder enlazarse con otras subunidades mucho mas pequeñas conocidos como monómeros. Las cadenas de subunidades estan unidas por enlaces covalentes los cuales se forman por deshidratación, estas cadenas pueden romperse por hidrólisis. La moléculas biologicas más importantes son los carbohidratos, lípidos, proteínas y ácidos nucleicos.

How are growth and development dinstinct from each other

Answers

Answer:

Growth is a physical change in ones body size that can be easily observed.

Development is the ability to do things complex, challenging, and difficult.

In this excerpt, a reader can conclude that Lizzie is playful based primarily on her

Answers

Answer:

based on Lizzie's words

What can you learn about by studying DNA?

Answers

Answer:

whether these DNA tests can tell us much about an individual newborn's destiny, they are already a useful research tool that is providing new insights into how genes and environments interact, new avenues for understanding how mental illnesses (and other illnesses) develop and new pathways to explore potential ...

hope this will help you

mark me brainliest

Answer:

Explanation:

we can learn about DNA tests can tell us much about an individual newborn's destiny, they are already a useful research tool that is providing new insights into how genes and environments interact.

.1.2 The type of control shown in the diagram is known as

Answers

Answer:

which diagram

Explanation:

I hope you understand

what is osmolarity of mammalian urine?​

Answers

Answer:

The osmolarity of mammalian urine may vary over time. The osmolarity of mammalian urine varies little between species. Mammalian urine is always hyperosmotic to blood. The osmolarity of mammalian urine may vary over time.

Explanation:

I hope it will help you

What are the student’s observations and inferences before he starts his investigation?

Answers

Answer:

Hypothesis. A Hypothesis is an estimation of what might happen and the student's observation before moving on to investigate.

Is cell division a continuous process?

Illustrate with an example

Answers

Answer:

Cell division is the means of reproduction in unicellular organisms whereas it is the means of tissue growth and maintenance in multicellular organisms. ... In adults, cell divisions are involved in renewing old tissues rather than growth.,ya it is continuously processing

PLEASE HELP FAST PLEASE ASAP HURRY

Answers

Answer:

A number is a correct answer

Help meeee!!!!
Why is it necessary to check total aerobic microorganisms in microbiological quality control but not to test total anaerobic microorganisms?

Answers

Answer:

While many microbes are harmless to humans, others can cause serious problems. They can spoil food, introduce toxins, cause disease and lead to a host of other problems. The importance of microbiological testing is to quickly identify these contaminants and treat them before they do irreversible damage.

Explanation:

Aerobic bacteria are bacteria that can grow and live when oxygen is present.

Importances of bacteria to humans​

Answers

Answer:

Bacteria are very important to humans, both for good and for bad, due to their chemical effects and the role they play in spreading disease. In their beneficial effect, some bact

Some bacteria are used for the production of antibiotics which is useful to human

List some Characteristic of fruits.​

Answers

Answer:

Quality factors for fruits include the following— maturity, firmness, the uniformity of size and shape, the absence of defects, skin and flesh color. Many of the same quality factors are described for vegetables, with the addition of texture-related attributes such as turgidity, toughness, and tenderness.

Select the statement about human impact on the environment that is FALSE. The number of humans engaging in a specific activity impacts the severity of the issue. Damaging the environment threatens human and ecosystem health. Pesticide and fertilizer use by humans is particularly damaging to the environment. Urban growth leads to increased waste, which leads to climate change.

Answers

Answer:

the answer is should be True

The biological classification of organisms is called taxonomy. Based on your own investigation, discuss the importance of taxonomy in biological research.

Answers

Answer:

mark me as brainliest

Explanation:

It helps to ascertain the number of living beings on Earth. More than one million of species of plants and animals have been discovered and classified so far. It aims to classify the living organisms. Millions of organisms are classified scientifically in categories, which helps to have a better understanding

The theory and practice of characterizing, naming, and classifying living things is known as taxonomy. Such research is critical for a basic knowledge of biodiversity and its preservation.

What is the importance of taxonomy in biological research?

Taxonomy is important because:

It aids in estimating the number of living beings on the planet. nearly one million plant and animal species have been identified and classified till date.Its goal is to classify living things. Thousands of creatures are scientifically divided into categories, which aids in understanding.It aids our understanding of the characteristics seen in plants and animals.It depicts the physical development in chronological order.It provides an overview of the local fauna and flora, which aids in the identification of endemic species.

learn more about taxonomy here:

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The conversion of liquid water into gaseous water is called?

Answers

Answer:

vapourization

Explanation:

When the water is heated, it changes into water vapour which is called vapourization or sometimes we can also call it evaporation.

Question 5
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Complete the following sentence: "The interior of living cells is more
than the exterior because more
ions are expelled than ions are taken in by the sodium-potassium pump."
Select one:
O a. electropositive. Nak
O b. electronegative, Na.
O C. electronegative, Na, K
O d. electropositive, Na+, K+
Question 6
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The high concentration of protons in the inner mitochondrial space relative to the mitochondrial matrix represent
O
В.
77°F
AGD (0)
10-25 PM
7/28/2021

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Answer:

i really really need the brainly points

Explanation:

sry for this answer, i need the answers for myself

The mass of the Sun is 1.99 × 1030 kg. Jupiter is 7.79 × 108 km away from the Sun and has a mass of 1.90 × 1027 kg. The gravitational force between the Sun and Jupiter to three significant figures is × 1023 N.

Answers

Answer:

4.16

Explanation:

edge2021

Answer:

4.16

Explanation:

Occurs in mitochondria.
Select one:
a. Both Photosynthesis and Cellular Respiration
b. Neither Photosynthesis nor Cellular Respiration
c. Photosynthesis
d. Cellular Respiration

Answers

Answer:

d. cellular respiration

Explanation:

mitochondria is where cellular respiration occurs, and photosynthesis occurs in the chloroplast, so d would be the most reasonable answer.

what is the definition of wildlife?

Answers

Answer:

wild animals collectively; the native fauna (and sometimes flora) of a region.

Explanation:

I hope this helped :)

Animals living in their natural habitat and not within the possession or control of humans.

¿Qué afirmación(es) es(son) correcta(s)?:
a) El dióxido de azufre de la quema de carbón en centrales
eléctricas protege contra la lluvia ácida.
b) Los óxidos de nitrógeno de las emisiones de combustión
provocan el aumento del pH en el agua de lluvia.
c) Una solución ácida de dióxido de carbono en agua de lluvia se
llama lluvia ácida.
d) El dióxido de azufre junto con los óxidos de nitrógeno son las
principales causas de la lluvia ácida.

Answers

Explanation:

jwjejeueuru4ibwsbbefbrvbrbebdbfhhdhdhdbdbdfbd3 eebdddd

Why should body temperature not be allowed to fluctuate too much? ​

Answers

Answer:

Because that can destroy the helpful enzymes in the body, and therefore cause a lot of problems or maybe cause death


What component of Earth's atmosphere exists entirely as a result of photosynthesis?
oxygen pas
n mas
O water vapor
O nitrogen gas
O carbon dioxide gas

Answers

Answer:

Explanation:

Carbon dioxide

The last one is correct
Hope its help for your questions

For every 100ml of deoxygenated blood delivers approximately _____ml of CO2 to the alveoli.​

Answers

Answer:

For every 100ml of deoxygenated blood delivers approximately __4___ml of CO2 to the alveoli.

Answer:

4ml

Explanation:

For every 100ml of deoxygenated blood delivers approximately 4 ml of CO2 to the alveoli.

Hope it is helpful....

Phân tích các quy luật hoạt động thần kinh cấp cao ở trẻ và vận dụng trong thiết lập thói quen học tập và kỉ luật ở học sinh tiểu học.

Answers

Answer:

very different than ducks do u want it is not the

What variable should Anurag change in his experiment

Answers

Answer:

For geological carbon sequestration, the reaction of aqueous CO2 with silicate rock permits carbonate formation, achieving permanent carbon sequestration.A

Explanation:

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