The net charge on a molecule of a particular amino acid will be 1- when the pH is higher than the pI (isoelectric point) of the amino acid. In this case, the pI is 7.5, so the net charge will be 1- at a pH higher than 7.5.
The net charge on a molecule of an amino acid depends on the pH of the solution it is in. Amino acids have both acidic and basic functional groups, such as the amino group (-NH2) and the carboxyl group (-COOH). These functional groups can ionize, meaning they can either donate or accept protons depending on the pH of the solution.
The isoelectric point (pI) of an amino acid is the pH at which the net charge on the molecule is zero. At this pH, the number of positive charges (from protonated amino groups) is equal to the number of negative charges (from deprotonated carboxyl groups).
In this case, the pI of the amino acid is 7.5. Since the desired net charge is 1-, the pH must be higher than the pI. At a pH higher than 7.5, the amino acid will have a net negative charge because the carboxyl group will be deprotonated (COO-) while the amino group will remain protonated (NH3+). This results in a net charge of 1- on the molecule.
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Match the appropriate benefit of dietary fiber intake to its associated disease. (Use each choice only once). Cardiovascular Disease A. Lowers Blood Cholesterol Hypertension B. Lowers Blood Pressure Type 2 Diabetes c. Decreases intestinal transit time and exposure to potential toxins Constipation D. Slows absorption of glucose Obesity E Slows rate of digestion, promotes satiety Colon Cancer F. Increases fecal bulk & promotes regularity
Cardiovascular diseases (CVDs) are the most common cause of death worldwide, claiming the lives of an estimated 17.9 million persons each year. CVDs are a group of heart and blood disorders.
How is blood made in the human body?The bone marrow produces stem cells, the building blocks that the body uses to make the different blood cells – red cells, white cells and platelets. The erythropoietin sends a message to the stem cells telling more of them to develop into red blood cells, rather than white cells or platelets.
What is in human blood?Whole blood is made up of red blood cells, white blood cells and platelets, all of which are suspended in a liquid called plasma. Whole blood and each of it's four components are all valuable tools in modern medicine.
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phosphorus-32 has a half-life of 14.3 days. if an initial sample has a mass of 4.00 mg, how many milligrams will remain after 71.5 days?
Answer:0.125 g
Explanation:
Nitrogen is an element. What is the smallest particle of nitrogen that has all the properties of nitrogen?
Answer:
The structure of the atom.
Explanation:
The correct answer is - The structure of the atom.
Reason -
An atom is the smallest unit of matter that retains all of the chemical properties of an element.
if the reaction begins with 95.00 grams of cr2o3 and 183.0 grams of silicon, how many grams of the excess reactant will be used?
The limiting reactant is the one that is used up first and sets a limit on the quantity of product(s) that can be produced. Calculate the moles of each reactant present and contrast this ratio with the mole ratio of the reactants in the balanced chemical equation to determine the limiting reactant.
When a chemical reaction is complete, the limiting reagent—also known as the limiting reactant or limiting agent—is the reactant that has been completely consumed. Since the reaction cannot proceed without this reagent, the amount of product that can be produced is constrained. Excess reagents or excess reactants are any reagents that are present in amounts greater than those necessary to cause a reaction with the limiting reagent (sometimes abbreviated as "xs"). Since the amount of product produced when the limiting reagent interacts entirely is defined as the theoretical yield, the limiting reagent must be identified in order to calculate the percentage yield of a reaction. There are various equivalent techniques to determine the limiting reagent and assess the excess amounts of other reagents given the balanced chemical equation that describes the reaction.
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When a boxer is hit in the head by a moving fist, what type of concussion injury does this
cause? Explain how the brain is injured in this situation.
teral
hope this helped i hade to do some research
Explanation:
There is a transient electro-physiologic dysfunction of the reticular activating system in the upper midbrain caused by rotation of the cerebral hemispheres on the fixed brainstem. -The CSF cushions the brain from light trauma in times of more severe impact, the forces on the brain may be linear, angular, or rotational, in rotational movement, the head turns around its center of gravity: this is the primary mechanism causing concussion.
Read this passage about Christopher Reeve.
Christopher Reeve was born on September 25, 1952, in New York City. His mother was a journalist, and his father was a professor. As a kid he played sports, did well in school, and liked acting. His passion for acting goes back to playing with his brother when they were little. Reeve acted in his first play at the age of nine. After attending college, taking acting classes, and acting in many plays and movies, Reeve landed his biggest role. In 1978, he played the title role in Superman. He received very positive reviews for his performance and starred as Superman in all the sequels. Reeve was soon acting as the lead role in dozens of movies after Superman. Once well-known, Reeve used his celebrity status for good causes, such as visiting very sick children through the Make-A-Wish foundation. He was also a track and field coach at the Special Olympics.
Besides acting, Reeve was also a licensed pilot and liked horseback riding. He learned to ride horses for a movie role, and he continued riding in his free time. Unfortunately, while riding one day in 1995, Reeve fell from his horse and became paralyzed from the neck down. Being confined to a wheelchair did not hold back Reeve from being socially active, and after many surgeries and rehabilitation, he decided to dedicate his life to helping people with spinal-cord injuries. He created the Christopher Reeve Foundation, which supports the improvement of the lives of people with disabilities and helps fund research to find a cure for paralysis. He was also politically active, working with senators to make sure that people with disabilities were treated fairly in the workplace. Reeve received many awards for his dedication to public service. He also wrote two books about his experiences, and a documentary was made about his life. Reeve passed away in 2004, but his legacy lives on today. He touched the lives of many people and showed us what it means to overcome extreme odds by never giving up.
Based on this passage, Reeve best fits in the yearbook category
“Most Likely to Take Risks.”
“Most Likely to Help Others.”
“Most Likely to Run for President.”
“Most Likely to Be a Musician.”
PLEASE HURRY ONLY 10 MINUTES LEFT
Answer:
"most likely to help others"
Explanation:
thank u hope it helps u
What is evaporation ?In what way it is different from boiling? What is the effect
of humidity on the rate of evaporation?
Define Latent heat of fusion? Why does steam cause more severe burning as
compared to boiling water at 1000C ?
Evaporation is the process by which a liquid converts into a gas or vapor at a temperature below its boiling point. Latent heat of fusion is the amount of heat required to convert a solid into a liquid without any change in temperature. Steam causes more severe burning as compared to boiling water at 100°C due to the large amount of latent heat of vaporization.
On the other hand, boiling is the process by which a liquid turns into a gas or vapor at a temperature equal to or above its boiling point. In other words, when the liquid is heated to a temperature equal to or greater than its boiling point, it turns into a gas or vapor. The effect of humidity on the rate of evaporation is that if the air around the liquid is already humid, then the rate of evaporation will be slower because the air is already saturated with water molecules.
Latent heat of fusion is the amount of heat required to convert a solid into a liquid without any change in temperature. In other words, it is the amount of heat required to break the intermolecular forces between the molecules of a solid to convert it into a liquid.
Steam causes more severe burning as compared to boiling water at 100°C because steam contains a large amount of latent heat of vaporization. When steam comes in contact with the skin, it releases a large amount of latent heat of vaporization, which causes more severe burns as compared to boiling water at 100°C.
Evaporation is the process of turning a liquid into a gas or vapor at a temperature below its boiling point. Boiling, on the other hand, is the process of turning a liquid into a gas or vapor at a temperature equal to or above its boiling point. Humidity affects the rate of evaporation. Latent heat of fusion is the amount of heat required to convert a solid into a liquid. Steam causes more severe burning as compared to boiling water at 100°C due to the large amount of latent heat of vaporization.
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A family consumes 2.5 gallons of milk per week. How many liters of milk do they need to buy for one month? (Assume there are exactly 4 weeks in 1 month) SHOW WORK
Answer:
37.85 liters
Explanation:
they need 10 gallons for a month (2.5*4)
after that, convert gallons to liters (conversion to liters= 3.785)
10*3.7585= 37.85
What property of a metal does the image represent
Answer:
malleable
Explanation:
The image represent in malleable property of metal.
The image possibly represents the photoelectric effect of a metal, which is when it emits electrons after being exposed to electromagnetic radiation. Metals are also characterized by physical properties such as conductivity, malleability, metallic luster, and metallic bonding.
Explanation:Based on your question, the image possibly represents the photoelectric effect, a key property of metals. This phenomenon occurs when a metal surface exposed to electromagnetic waves of a certain frequency absorbs radiation and emits electrons. These emitted electrons are called photoelectrons. Metals can also exhibit free electron model behavior, where electrons freely roam within the metal structure.
Metals possess unique physical properties like conductivity, malleability, and metallic luster. Malleability refers to the metal's ability to deform without breaking, while conductivity refers to the metal's ability to transfer heat or electricity. A metallic luster gives metals their characteristic shiny appearance.
Finally, metals are also known for their metallic bonding—a unique force that holds together the atoms within a metallic solid. Metallic bonding gives rise to many useful and varied bulk properties of metals.
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Which organelle breaks down materials and releases energy into the cell?
Answer:
Nucleus
Explanation:
please help this is urgent
The ratio of the resistance of wires Y and X is 2:1
What is resistance?Resistance in an electrical circuit is used to calculate the current flow. The symbol for the ohm, a unit of measurement for resistance, is omega. The unit of resistance is named after German physicist Georg Simon Ohm, who looked into the relationship between voltage, current, and resistance. He is credited for creating Ohm's Law.
To ascertain the state of a component or circuit, resistance measurements are frequently made.
Since resistance is independent of length, it stays constant. The term resistivity itself refers to the material's resistance per unit length and unit area.
While the resistance depends on the length
R₁=ρL/A
R₂=ρ2L/A
R₂=2ρL/A
R₂=2R₁
Thus, the resistance of a second wire is twice that of a first wire.
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2. (**) modern vacuum pumps make it easy to attain pressures of the order of 10-13 atm in the laboratory. consider a volume of air and treat the air as an ideal gas. a. at a pressure of 9.00 * 10-14 atm and an ordinary temperature of 300.0 k, how many molecules are present in a volume of 1.00 cm3 ? b. how many molecules would be present at the same temperature but at 1.00 atm instead?
The number of air molecules in a volume of 1.00 cm3 under the conditions of the vacuum pump is 3.65 * 10-15 moles and those that would be present at the same temperature but at 1.00 atm would be 0, 04 moles
The vacuum pump is a device that extracts gas molecules from a sealed volume, to create a partial vacuum, and is frequently used in industry, especially food.
To perform both calculations considering air as an ideal gas, the equation PV = nrt is used, in which
P = Pressure
V = Volume
n = number of moles
R = Gas constant
t = temperature
Calculation of the number of air molecules in a volume of 1.00 cm3 under the conditions of the vacuum pumpData
t = 300K
V = 1L
P = 9.00 * 10-14 atm
R = 0.082 L Atm / mol °K .
n = ?
PV = nrt
n = PV/rt
n = 9.00 * 10-14. 1 / 0.082 . 300
n = 9.00 * 10-14 / 24.6
n = 3.65 * 10-15 moles
Calculation of the number of molecules present at the same temperature but at 1.00 atmData
t = 300K
V = 1L
P = 1 atm
R = 0.082 L Atm / mol °K .
n = ?
PV = nrt
n = PV/rt
n=1. 1 / 0.082 . 300
n = 1 / 24.6
n = 0.04 mole
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Grams of water need to make 25 grams of hydrogen
Answer: There are 2.77 moles of hydrogen in 25 g of water.
Explanation:
One gram of water is composed of two atoms of hydrogen and one atom of oxygen, and each hydrogen atom weighs one-twelfth of a gram. Therefore, the total amount of hydrogen in one gram of water is two-twelfths of a gram, or 0. 167 grams.
balance:
_H3[PO4] —> _H4[P2O7] + _H2O
Answer:
2
Explanation:
Answer:
2H3[PO4] —> H4[P2O7] + H2O
Explanation:
which component of the glycolytic pathway undergoes an oxidative decarboxylation, with the resulting product being fed into the citric acid cycle?
Pyruvate is the he component of the glycolytic pathway that undergoes an oxidative decarboxylation and feeds into the citric acid cycle.
what is the product obtained in decarboxylation process of pyruvate?Pyruvate decarboxylation is the process that converts pyruvate, the end product of glycolysis, into acetyl-CoA, which is then fed into the citric acid cycle for further oxidation and energy production. This process involves the loss of a carbon dioxide molecule and an oxidation reaction. During pyruvate decarboxylation, pyruvate loses a molecule of carbon dioxide (CO2) and is oxidized to form acetyl-CoA. The carbon dioxide is released as a waste product, while the remaining two-carbon molecule (acetyl) is fed into the citric acid cycle. In the citric acid cycle, the acetyl group is further oxidized and broken down, releasing more energy in the form of ATP. The citric acid cycle also produces carbon dioxide and water as waste products.
What is pyruvate in glycolysis process?Pyruvate is the end product of glycolysis, a metabolic pathway that breaks down glucose to produce energy. In the next step, pyruvate is transported into the mitochondria where it undergoes a process called pyruvate decarboxylation. In this process, pyruvate is converted into acetyl-CoA by a series of enzyme-catalyzed reactions.
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PLEASE HELP WILL MARK AS BRAINIEST
Answer:
for 1st question the answer is maybe 4th or 1st ( I think 4th ).
and for the 2nd question 4th ( consumers ) option is the answer
and the answer of third question is omnivores.
Answer:
1) The transfer or flow of energy.
2)Consumers
3)Omnivores
May it help you
What value do you calculate for the ratio t1/2(0.05M) / t1/2(0.01M) from your experimentally measured half-lives at 55 °C?
The ratio of the half-lives at 0.05M and 0.01M concentrations, measured at 55 °C.
The half-life of a reaction represents the time it takes for the concentration of a reactant to decrease by half. In this case, we are comparing the half-lives at two different concentrations, 0.05M and 0.01M, both measured at a temperature of 55 °C. Let's denote the half-life at 0.05M concentration as \(\(t_{1/2}(0.05M)\)\) and the half-life at 0.01M concentration as \(\(t_{1/2}(0.01M)\)\).
To calculate the ratio of these two half-lives, we divide \(\(t_{1/2}(0.05M)\)\) by \(\(t_{1/2}(0.01M)\)\). Assuming you have experimental values for both half-lives, you can substitute those values into the formula. For example, if \(\(t_{1/2}(0.05M)\)\) is measured to be 10 seconds and \(\(t_{1/2}(0.01M)\)\) is measured to be 5 seconds, the ratio would be \(\(\frac{10}{5} = 2\)\).
Please provide the experimental values for the half-lives at 0.05M and 0.01M concentrations measured at 55 °C, and I can calculate the specific value for the ratio \(\(t_{1/2}(0.05M) / t_{1/2}(0.01M)\)\).
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Define [Fluid compressibility, Solution-gas/liquid ratio, Fluid FVF, Fluid densities, and Fluid viscosities], write their equations, symbols, units \& correlations. (25-points)
1. Fluid compressibility (C): Fluid compressibility refers to the measure of how much a fluid's volume changes in response to a change in pressure.
2. Solution-gas/liquid ratio (SGLR): The solution-gas/liquid ratio represents the volume of gas dissolved in a given volume of liquid at a specific pressure and temperature.
3. Fluid formation volume factor (FVF): The fluid formation volume factor represents the ratio of the volume of a fluid at reservoir conditions (pressure and temperature) to its volume at surface conditions.
4. Fluid densities (ρ): Fluid densities refer to the mass per unit volume of a fluid.
5. Fluid viscosities (μ): Fluid viscosities represent the measure of a fluid's resistance to flow.
1. Equation: C = -1/V * dV/dP
Symbol: C
Unit: 1/Pascal (Pa^-1)
Correlation: The compressibility of fluids can vary depending on the fluid type. For ideal gases, the compressibility is inversely proportional to pressure.
2.Equation: SGLR = V_gas / V_liquid
Symbol: SGLR
Unit: Volumetric ratio (e.g., scf/bbl)
Correlation: The solution-gas/liquid ratio is influenced by the pressure and temperature conditions, as well as the composition of the fluid.
3. Equation: FVF = V_reservoir / V_surface
Symbol: FVF
Unit: Volumetric ratio (e.g., bbl/STB)
Correlation: The fluid formation volume factor depends on the composition and properties of the fluid, as well as the reservoir conditions.
4. Equation: ρ = m / V
Symbol: ρ
Unit: Mass per unit volume (e.g., kg/m^3)
Correlation: Fluid densities can vary depending on the type and composition of the fluid. For example, water has a density of approximately 1000 kg/m^3.
5. Equation: No single equation; viscosity is measured experimentally using viscometers.
Symbol: μ
Unit: Pascal-second (Pa·s) or centipoise (cP)
Correlation: The viscosity of a fluid is influenced by temperature and pressure. Different fluids exhibit different viscosities, ranging from low-viscosity fluids like water to high-viscosity fluids like heavy oil.
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Calcium carbide (CaC2) reacts with water to produce acetylene (C2H2): CaC2 (s) + 2H2O (g) → Ca(OH)2 (s) + C2H2 (g) Production of 39 g of C2H2 requires consumption of ________ g of H2O
Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, production of 39 g of C\(_2\)H\(_2\) requires consumption of 53.6g of H\(_2\)O.
What is mole?The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.
moles of C\(_2\)H\(_2\)= mass of C\(_2\)H\(_2\)/molar mass of C\(_2\)H\(_2\)
=39 g /26.04
= 1.49moles
for 1 mole of C\(_2\)H\(_2\), 2 moles of H\(_2\)O is required.
for 1.49 moles of C\(_2\)H\(_2\), 2×1.49=2.98 moles of H\(_2\)O is required.
mass of water= moles× Molar mass
= 2.98×18
=53.6g
Therefore, production of 39 g of C\(_2\)H\(_2\) requires consumption of 53.6g of H\(_2\)O.
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A gas sample was produced in the laboratory. The gas was determined to be more dense than air (which is mostly composed of nitrogen). What is the identification of the gas? a)Hydrogen b)Neon c)Methane (CH_4) d)Carbon Dioxide
The correct option is (d) Carbon Dioxide.
Explanation:
The density of air is around 1.2 g/L, which means that any gas with a density above this value is more dense than air.
Carbon dioxide has a density of approximately 1.98 g/L, which is considerably more dense than air (composed of nitrogen and oxygen).
As a result, if a gas sample is determined to be more dense than air, it is likely to be carbon dioxide (CO2), which has a molecular weight of 44 g/mol.
Carbon dioxide is produced in the laboratory by many chemical reactions and is commonly employed in the food and beverage industries, such as carbonating soda and beer.
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Choose the best
1. Aliquid is a form of matter that:
a flows,
b. is easily compressed.
c. has no definite volume.
d. has a definite shape.
Answer:
d. has a definite shape.
Explanation:
I’m not sure what the answer is
Johnny had a balloon filled with 0.222 moles of hydrogen gas. When his lab partner Marisa lit the balloon with a candle on the end of a long stick it burst into a fireball making water. Johnny and Marisa realized that the hydrogen in the balloon reacted with the oxygen in the air to make water according to the equation:
2H2 + O2 --> 2H2O
Their teacher asked them to find out how many moles of oxygen were burned and how many moles of water were formed.
To solve this we must be knowing each and every concept related to moles. Therefore, 0.11moles of oxygen were burned and 0.222 moles of water were formed.
What is mole?A mole is merely a measuring unit. In reality, it is among the International System on Units' seven foundation units (SI). When basically determines are insufficient, new units are created.
Chemical reactions frequently occur at levels that use grams would be inappropriate, but using actual figures of atoms/molecules/ions would also be misleading. As a result, scientists devised the mole for bridge the divide between extremely small and extremely huge numbers.
2H\(_2\) + O\(_2\) \(\rightarrow\) 2H\(_2\)O
The mole ratio between hydrogen gas and oxygen gas is 2:1
moles of hydrogen gas = 0.222 moles
moles of oxygen gas =0.11moles
moles of water formed = 0.222 moles
Therefore, 0.11moles of oxygen were burned and 0.222 moles of water were formed.
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Which of the following is the strongest base?
a. ammonia b. dimethylamine c. aniline d. 4-nitroaniline
The strongest base among the given compounds is d. 4-nitroaniline.
What are bases?
Bases are a substance that reacts with water to form hydroxide ions, which increase the pH of an aqueous solution. There are two types of bases: strong bases and weak bases.
Strong bases are bases that completely ionize to produce hydroxide ions when they are dissolved in water. A strong base has a high pH and can dissolve many substances. Examples of strong bases are sodium hydroxide (NaOH), potassium hydroxide (KOH), and calcium hydroxide (Ca(OH)2).
Weak bases are bases that only partially ionize when they are dissolved in water. A weak base has a lower pH than a strong base, and it cannot dissolve many substances. Ammonia (NH3), methylamine (CH3NH2), and aniline (C6H5NH2) are examples of weak bases.In this case, the strongest base among the given compounds is 4-nitroaniline (d).
It is the strongest base because it contains a strong electron-withdrawing group, which withdraws electrons from the nitrogen, making the nitrogen more nucleophilic. As a result, 4-nitroaniline is a stronger base than the other compounds given.
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WHAT ARE THE PROPERTIES OF Metallic and Non-metallic
Answer:
Metallic character refers to the level of reactivity of a metal. Non-metallic character relates to the tendency to accept electrons during chemical reactions. Metallic tendency increases going down a group. Non-metallic tendency increases going from left to right across the periodic table.
Explanation:
Answer:
Metals Non-metals
Shiny Dull
High melting points Low melting points
Good conductors of electricity Poor conductors of electricity
Good conductors of heat Poor conductors of heat
High density Low density
Malleable Brittle
Explanation:
Predict the electron pair geometry and the molecular structure of each of the following:(a) IOF5 (I is the central atom)
(b) \(\mathrm{POCl} 3\) ( \(\mathrm{P}\) is the central atom)
(c) \(\mathrm{Cl} 2 \mathrm{SeO}\) (Se is the central atom)
(d) \(\mathrm{ClSO}+\)
Answer: Predict the electron-pair geometry and molecular structure for each of the following: carbon dioxide, CO2 CO 2, a molecule produced by the combustion of fossil fuels boron trichloride, BCl3 BCl 3, an important industrial chemical
Question 1 (5 points)
In the image below, if the frisbee represents light, what does the fence represent?
Answer:
wheres the image
Explanation:
Answer: vacuum
Explanation: light travels as a wave but unlike sound waves or water it doesn’t need any matter to carry it energy along. This means that light can travel through a vacuum which means a completely airless space the wall is vacuum
g If you had a solution with 50 mM Phosphate buffer solution at a pH 4.5. What would you expect the phosphate molecules in this solution to look like
In a 50 mM Phosphate buffer solution at a pH of 4.5, the phosphate molecules are expected to exist in their ionized forms, primarily as dihydrogen phosphate ions (H\(_{2}\)PO\(_{4}\)-) and hydrogen phosphate ions (HPO\(_{42}\)-).
At a pH of 4.5, the solution is slightly acidic. In an acidic environment, the phosphate buffer system maintains its pH by the equilibrium between the dihydrogen phosphate and hydrogen phosphate species. The dihydrogen phosphate ion acts as a weak acid, donating a proton (H+) to water to form a hydronium ion (H\(_{3}\)O+). This reaction can be represented as follows:
H\(_{2}\)PO\(_{4}\)-- + H\(_{2}\)O ↔ H\(_{3}\)O+ + HPO\(_{42}\)-
The hydrogen phosphate ion acts as a weak base, accepting a proton from water to form hydroxide ions (OH-). This reaction can be represented as follows:
HPO\(_{42}\)- + H\(_{2}\)O ↔ OH- + H\(_{2}\)PO-
The equilibrium between these two species allows the phosphate buffer system to resist changes in pH when small amounts of acid or base are added to the solution.
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PLEASE HELP ME!!
Which two structures are found only
in plant cells?
A. nucleus, chloroplast
B. cell wall, cell membrane
C. nucleus, cell membrane
D. cell wall, chloroplast
Answer:
The answer to this question is D.
Explanation: We know that only plants have a cell wall so that is helpful and we know that plants are green because of their chloroplast. So the answer is D, cell wall, and chloroplast.
Answer:
A
Explanation:
plant cells have a nucleus, which controls the cells activities. and the chloroplast contains a green pigment called the chlorophyll and is where photosynthesis occurs.
A animal cell does not have a nuclues, making it Prokaryotic.
Hoping i was of use :)
is a single cell the smallest structure that carries out our activities nesscesary for life
yep, the cell is the smallest unit in a living organism that is capable of carrying out all of the activities of life.