Answer:
Plasma membranes have three primary functions: (1) they keep toxic substances out of the cell; (2) they contain receptors and channels that allow specific molecules, such as ions, nutrients, wastes, and metabolic products, that mediate cellular and extracellular activities to pass between organelles and between the cell and the outside environment; and (3) they separate vital but incompatible metabolic processes conducted within organelles
Explanation:
a sample of gold has a mass of 96.5 g and a volume of 5.00 cm3. the density of gold is
Answer:
19.3 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass = 96.5 g
volume = 5 cm³
We have
[tex]density = \frac{96.5}{5} \\ = 19.3[/tex]
We have the final answer as
19.3 g/cm³Hope this helps you
what is the process that causes the seafloor to rise during a subduction zone earthquake?
Answer:Seafloor spreading is a geologic process in which tectonic plates—large slabs of Earth's lithosphere—split apart from each other. Seafloor spreading and other tectonic activity processes are the result of mantle convection. ... The less-dense material rises, often forming a mountain or elevated area of the seafloor.
Explanation:
Brainliest pls
The photoelectron spectrum for the element nitrogen is represented above. Which of the following best explains how the spectrum is consistent with the electron shell model of the ato
f the atom?
A. The leftmost peak represents the valence electrons.
B. The two peaks at the right represent a total of three electrons.
C. The electrons in the ls sublevel have the smallest binding energy
D. The electrons in the 2p sublevel have the smallest binding energy
Answer:
D. Is the correct option.
Explanation:
2p level contains the electrons furthest from the nucleus in the case of Nitrogen thus it's much easier to disperse/remove the electrons from the shell due to low pull of nucleus energy.
The best explanation of how the spectrum is consistent with the electron shell model of the atom is the electrons in the 2p sub level have the smallest binding energy. Thus, option D is correct.
What is photoelectron spectrum?
Photoemission spectroscopy also known as photoelectron spectroscopy which photoelectric effect is the process in which electron are get energy from external source of energy like sunlight deals with energy measurement of energy emission or electrons emitted from solids, gases or liquids by the process of photoelectric effect,
Photoelectric effect is the process in which electron are get energy from external source of energy like sunlight and get excited and comes in excited state from the ground state due to this process continuos flow of electron is take place and after that flow of energy is takes place.
Therefore,The best explanation of how the spectrum is consistent with the electron shell model of the atom is the electrons in the 2p sub level have the smallest binding energy. Thus, option D is correct.
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explain why the yield of grain increases when nitrate-containing fertiliser is added.
Explanation:
Nitrogen is an essential element for plant growth and development; however, due to environmental pollution, high nitrate concentrations accumulate in the edible parts of these leafy vegetables, particularly if excessive nitrogen fertilizer has been applied. Consuming these crops can harm human health; thus, developing a suitable strategy for the agricultural application of nitrogen fertilizer is important. Organic, inorganic, and liquid fertilizers were utilized in this study to investigate their effect on nitrate concentrations and lettuce growth. The results of this pot experiment show that the total nitrogen concentration in soil and the nitrate concentration in lettuce increased as the amount of nitrogen fertilizer increased. If the recommended amount of inorganic fertilizer (200 kg·N·ha−1) is used as a standard of comparison, lettuce augmented with organic fertilizers (200 kg·N·ha−1) have significantly longer and wider leaves, higher shoot, and lower concentrations of nitrate.
Nitrogen is a critical element for plant growth and development; however, due to environmental pollution, high nitrate concentrations get in the edible regions of these leafy vegetables, particularly if excessive nitrogen fertilizer has been involved.
What are nitrate-containing fertilizer?The main nitrate fertilizers exist as ammonium, sodium, potassium, and calcium salts. Nitrate exists highly reachable and can efficiently travel with water from the soil if there stands excessive rainfall and can get groundwater.
Nitrates in the soil exist as a primary source of nitrogen which is important for plant growth. Under normal conditions, nitrates are transformed to protein in the plant at about identical rates as they exist absorbed into the root system.
Nitrogen is a critical element for plant growth and development; however, due to environmental pollution, high nitrate concentrations get in the edible regions of these leafy vegetables, particularly if excessive nitrogen fertilizer has been involved. Consuming these crops can damage human health; thus, developing a suitable method for the agricultural application of nitrogen fertilizer exists important. Organic, inorganic, and liquid fertilizers existed utilized in this analysis to investigate their impact on nitrate concentrations and lettuce growth. The results of this pot experiment demonstrate that the total nitrogen concentration in soil and the nitrate concentration in lettuce grew as the amount of nitrogen fertilizer increased.
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What are essential and non-essential water uses?
cho 13,5g nhôm tác dụng với dd HCl dư.Tính khí H2 (đktc) thu được
2Al+6HCl ->2AlCl3+3H2 .nAl=m/M=13,5/27=0,5(mol) =>nH2=0,5.3/2=0,75(mol)....VH2=n.22,4=0,75.22,4=16,8(lít)...
- ¿Qué otros materiales de tu entorno podrías utilizar que te permita mejorar tu filtrador de agua?
Suelo, grava, bolas de algodón, material de desecho, carbón, arena y astillas de madera.
El suelo, la grava, las bolas de algodón, los desechos, el carbón, la arena y las astillas de madera son materiales extraídos del medio ambiente que nos permiten mejorar la filtración del agua porque estos materiales filtran partículas y otras impurezas del agua y la hacen potable.
La arena y la grava se consideran buenos filtros de agua porque forman capas permeables que filtran el agua. El agua puede pasar lentamente a través de estas capas permeables y la mayoría de las partículas de suciedad quedan atrapadas, por lo que podemos concluir que los materiales anteriores se pueden utilizar como filtros de agua.
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what is the difference between essential and nonessential amino acids
Answer:
Simply put, essential amino acids are amino acids that cannot be made by the body. These amino acids must come from a person's diet, as the human body lacks the metabolic pathways required to synthesize these amino acids. ... Nonessential amino acids do not need to come from the diet.
Explanation:
hope it helps you
Which is an example of chemical weathering?
The reaction between sodium and water releases a lot of energy to the
surroundings. What type of process is this?
Answer:
an exothermic reaction i think
Explanation:
how many grams are contained in 3.4 moles of potassium
Answer:
The answer is 0.025576559594663
Calculate the medullary index of a hair whose diameter is 110
microns wide and whose medulla measures 58 microns. Is this
a human or animal hair?
The medullary index of hair is the ratio of medullary diameter to the diameter of hair. Thus the medullary of hair with 110 microns and medulla diameter of 58 microns is 0.533. This is an animal hair.
What is hair medullary index?Medullary index of hair is the ratio of diameter of the medullary part and the diameter of the hair strand. From this value, we can identify whether the sample hair is of humans or animals.
Hair is made proteins called keratin. The protein structure of hair vary from human to human even one hair strand to the other and similar way it is different in animal hair too.
The hair strand of humans are thin than the hair strands of animals. Thus the medullary index of humans is 0.333 or less. If the index is 0.50 or greater it is of animals.
Here the diameter of hair is 110 microns and that of medulla is 58 microns thus medullary index is 58/110 = 0.55 microns. Which means that it is an animal hair.
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A container holds 0.500 qt if liquid. how many mL of lemonade will it hold
Is CH4 a molecule, compound, or both?
AgNo3.
Electrolysis happening in water.
5.6l of Oxigen goes in Anod how much Ag goes on Ch?
List some things that help with heat generation. What do you use everyday that helps with heat generation?
Answer: A toaster
Explanation: A toaster is an house held item that is used for heating and toasting bread and other stuff.
Please hwelp mee with thwis..
Pwease just answer it on a correct answer and I'll give swome THANKS and 5 RATINGS.. Especwially I'll MARK IT AS BRAINLIEST..
Thank You if someone answer this!!
(ㆁωㆁ)
1. matter
2. oxygen
3. water
4. hydrogen
5. compound
hope it helps :)
a mixture in which substances are distributed evenly
what happens to the pressure of a gas if its volume is reduced?
Answer:
When the volume decreases, the pressure increases. This shows that the pressure of a gas is inversely proportional to its volume. This is shown by the following equation - which is often called Boyle's law. ... It means that for a gas at a constant temperature, pressure × volume is also constant.
Explanation:
may i have the brainlyest
Answer:
When the volume decreases, the pressure increases. This shows that the pressure of a gas is inversely proportional to its volume. ... It means that for a gas at a constant temperature, pressure × volume is also constant.
Explanation:
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True or False: Non-metal is a kind of metal.
Answer:
Explanation:
FALSE.
I hope this helps <333
:3
what type of solute causes the hydrogen ion concentration of a solution to decrease, which results in a high ph value?
Answer:
basic
Explanation:
like water to an acid or na2co3 or even diluting an acid causes its ph to increase
where are metal atoms located on the periodic table
Answer:
to the right of the steps
Explanation:
the metals stop at the stair step
2. What is the shape of the 3p atomic orbital?
whats the temperature outside in florida
Answer:
80 degrees
Explanation:
subscripts in chemical formulas are used to indicate the relative proportions of the elements in a
Answer:
relative proportions of the elements in a chemical reaction
A molecule or a compound can easily be represented by their formula.Subscripts in chemical formulas are used to indicate the relative proportions of the elements in a compound.
What is chemical formula?A chemical formula represent the identity and number of elements in a molecule or compound. Each element in periodic table has their own symbols. For example, hydrogen is H, oxygen having O, N for nitrogen, Na for sodium etc.
These chemical symbols are came from the first one or two letters of the Latin names of the elements. The number of these elements in a compound is given as subscripts of their symbols.
For example, there are two hydrogens and one oxygen in water and the formula is H₂O. Similarly the formula of carbon dioxide is CO₂ where one carbon and two oxygens are present. In this way the compounds can be easily identified and distuinguished using their chemical formulas.
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3. The substance that is formed or we finish up with are called.
. Which situation will result in lower average kinetic energy? a) 100 people go swimming into a NYC public pool b) 100 people go swimming at Coney Island beach
Answer:
I think it would be the beach because all the waves and such but in a pool with more people there is a tight space so they cant move around as much and as freely. But this could be a trickster question but I would choose the beach.
Hope this is right :)
Why are some ions known as poly atomic ions?
Answer:
NH4+ ammonium ion hydroxide ion
SO32- sulfite ion perchlorate ion
NO3- nitrate ion chlorate ion
NO2- nitrite ion chlorite ion
Are cations nonmetals
and anions are metals?
Answer:
First, each element that forms cations is a metal, except for one (hydrogen), while each element that forms anions is a nonmetal. This is actually one of the chemical properties of metals and nonmetals: metals tend to form cations, while nonmetals tend to form anions. Are positive ions metals or nonmetals?
Explanation:
1.What is another term for the 24 hour clock?
Answer:
military time
Explanation:
military time