Answer:
hydrogen bonding
Explanation:
The two strands of DNA are held together by hydrogen bonds between complimentary nucleotides.
How does carbon dioxide affect the Earth's climate?
Question 17 options:
Carbon dioxide is being added to the soil, which causes weather phenomenon.
Carbon dioxide mixes with water vapor to take harmful chemicals out of the air.
While carbon dioxide is in the air waiting to be reabsorbed it traps the sun's heat.
Answer:
While carbon dioxide is in the air waiting to be reabsorbed it traps the sun's heat.
Coryell walks 11 km south, and then turns east and walks 13 km. What is his
distance?
Answer:
its 24 cuz 13 + 11 =24. you're still walking 24 km in all. your going _|
Why must a solution of naoh be standardized using a primary standard, such as khp?.
A pure substance __________ . must be an element. can be separated into simpler substances by physical means. has different chemical and physical properties depending on its source. can be separated into simpler substances by chemical means.
Answer:
a pure substance has different chemical and physical properties depending on its source
Which statement best describes the movement of energy?.
Girls are usually completely physically mature by _____ years old. A. 17 B. 19 C. 14 D. 21.
Answer:
A. 17
Explanation:
Took the test on Edge & got 100% :D
lemon and amla have a sour taste. why
Answer:
They both contain citric acid.
Explanation:
Citric acid is sour and is found in citrus fruits such as lemon and amla. Acids usually have a sour taste and therefore lemon and amla are sour.
Select the correct answer. Which statement about cellulose is true? A. It’s a synthetic polymer. B. It’s a raw material used to make plastic. C. It’s produced using oil and gas. D. It’s used to make paper products.
Answer:
It's used to make paper.
Explanation:
Plato answer.
what is marble formed from A. obsidian B. granite C. limestone
Answer:
I'm pretty sure its C. limestone.
What is the molecular formula for a compound that is 46.16% carbon, 5.16% hydrogen and 48.68% fluorine if the molar mass of this compound is 156.12 g?
C6H8F4
C5H10F5
C6H6F3
The materials are carried in a cell by the what
Answer:
The endoplasmic reticulum
Organisms that live in the water (ocean, rivers, intertidal zones) must be adapted for changing conditions. Describe at least one (1) adaptation that organisms living in an aquatic ecosystem might have and how it helps the organism to survive.
One adaptation that organisms living in an aquatic ecosystem might have is the ability to regulate their salt concentration.
What are organism?Organisms are living species that live on the planet earth.
There are types of organisms categorized by the environment they live.
Organism that can survive only in water is called an aquatic organism.
We have,
One adaptation that organisms living in an aquatic ecosystem might have is the ability to regulate their salt concentration.
Aquatic environments can have varying levels of salinity, and some organisms need to maintain a specific salt concentration in their bodies to survive.
For example, marine fish have kidneys that can produce very concentrated urine to prevent them from losing too much salt in their surroundings, while freshwater fish have specialized cells in their gills that actively pump salt out of their bodies to maintain the appropriate balance.
Similarly,
Some marine invertebrates, such as crabs and mussels, can regulate the amount of salt they take in by actively transporting ions across their gills or other specialized structures.
This adaptation helps the organism to maintain the proper fluid balance and avoid dehydration or over-hydration, which can be lethal.
Thus,
One adaptation that organisms living in an aquatic ecosystem might have is the ability to regulate their salt concentration.
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What does an electrically neutral atom have the same number of?
protons and electrons
protons and neutrons
electrons and neutrons
protons, electrons, and neutrons
Answer:
it has an equal number of negative electric charges (the electrons) and positive electric charges (the protons).
Explanation:
So in all of the answers it would be A. Protons and Electrons
An event happens that decreases the number of earthworms, spiders, and insects in an area. How would you expect the event to affect to the number of long-billed curlews in the same area? (1 point) O It would not be affected. O It would stay the same. 0 It would increase. It would decrease.
Long-billed curlews feed on insects and worms mainly. Thus, their population will drastically reduce if there is a decrease in their food availability.
Factors affecting the population of organismsOne of the factors that affect the population size of a species is food availability.
Inadequate food increases intraspecies competition and results in more deaths. This leads to a reduction in the population size.
Long-billed curlews are a species of bird that feeds on insects and worms when inland. If an event leads to a decrease in the number of earthworms, spiders, and insects in an area, this will greatly reduce the population of long-billed curlews.
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Calcium-49, a radioactive isotope, has a half-life of 9 minutes. If an 80-gram sample of the isotope decays for 27 minutes, how many grams of the original sample remain?
Select one:
a. 60
b. 10
c. 40
d. 20
The electron configuration of element Y ends in s?p4. What is
the symbol for the ion most commonly formed by this element?
a y2+
b y2-
с ү6+
d Y
This problem is providing us with the end of the electron configuration an element as s²p⁴ and asks for the most commonly formed ion. At the end, the answer is b Y²⁻.
Electron configurationIn chemistry, when analyzing electron configurations, one must first take into account how the energy levels must be filled with electrons.
Now, note the problem states that the electron configuration ends by s²p⁴, which means it is closer to complete the octet so it needs two electrons in order to do so, as it behaves as a nonmetal.
Therefore, the most commonly ion formed by this element is Y²⁻, because of the fact that it needs two electrons to complete the octet and thus become chemically stable and likely to bond with a metal.
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Which statement best describes the characteristics of the Sun?
Red in color
at the center of our galaxy
Hotter than most stars
medium in size
A green powder was placed into a beaker of water. After it was stirred the water looked cloudy and lumps of powder could still be seen. Has a solution been formed? Explain your answer?
Answer:
it make poisionus police come and took away
The decomposition of A to B is a first-order reaction with a half-life of 32.8 min:
A → 2B
If the initial concentration of A is 0.595 M, how long will it take for the concentration of A to decrease by 10.4 %?
explain why a mixture is used as the electrolyte??
Answer:
You need a mixture of positive and negative ions
Explanation:
A mixture is used as the electrolyte because a mixture of positive and negative ions are needed.
What is a Mixture?This consists of two or more chemical substances which aren't chemically bonded together.
Electrolyte on the other hand conducts electricity when dissolved with the help of the mixture of positive and negative ions.
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Copper(I) nitrate, CuNO3, is dissolved in water and forms a transparent, blue mixture. What type of mixture is it
Which of the following equations represents a nuclear charge?
Select one:
a. A
b. B
c. C
d. D
Answer:
C
Explanation:
The reaction represents transmutation, which is a nuclear reaction where electrons are transferred.
Identify the solution that is likely to have the greatest concentration of H . Please choose the correct answer from the following choices, and then select the submit answer button. Answer choices orange juice ammonia pure water bleach blood
From what we know, we can confirm that the solution that is likely to have the greatest concentration of H+ is orange juice.
This has to do with the effects of H+ in a substance. The presence of hydrogen ions causes the substance to be more acidic, and the higher the concentration the higher the acidity of the substance. Since orange juice is the only acidic solution listed, we can know it will have the highest concentration of H+ ions.
Therefore, due to its acidic nature, we can confirm that the solution that is likely to have the greatest concentration of H+ is orange juice.
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What are two basic categories of matter
A clasping handshake may be used as an analogy for an enzyme-catalyzed reaction because it represents the specific manner in which an enzyme ________.
Answer:
binds to substrate
Explanation:
What adaptation’s do swallowtail possess?
Plz it’s urgent
4 items being divided equally among 3 people
[WILL MARK BRAINLIEST!!] Describe the relationship between molecular structure and the strength of electrostatic
forces between molecules. How does this impact boiling and melting points?
Answer:
increase the bonding strength between two or more molecules
hope this help
Explanation:
Boiling points and melting points
The overarching principle involved is simple: the stronger the noncovalent interactions between molecules, the more energy that is required, in the form of heat, to break them apart. Higher melting and boiling points signify stronger noncovalent intermolecular forces.
How many moles of H2O2 are produced in the production of hydrogen peroxide when 13 grams of oxygen are used
PLS HELP MEEEEEEEEEEEEEE WITH SCIENCEEEEEEEEEE
Answer:
I believe this is a measuring cylinder? and i think the volume is 35cm^3
Explanation:
hope this helps!
What is the role of flagella?
Answer:
a motility organelle that enables movement and chemotaxis
Explanation:
pls mark brainlist