API assigns a default value of Hs/D = 0.5 and an assumption of αR = αS , resulting in the 32.7 35.2 42.1 50.6 59.6 67.2 70.3 69.2 62.6 51.1 41.2 34.5.
What is API ?Communication between two or more computer applications is made possible via application programming interfaces (APIs). It is a kind of software interface that provides a service to other software. An API specification is a document or a standard that outlines how to create or use a connection or interface of this type. The term "implement" or "expose" refers to a computer system that conforms to this standard. A specification or an implementation may both be referred to as an API.
An application programming interface, as opposed to a user interface, links computer systems to people, while a user interface does the opposite.
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Suppose that when you exercise, you consume 100 g of glucose and that all the energy released as heat remains in your body at 37 c. what is the change in entropy of your body?
The change in entropy of our body will be 5.03 kJ.
Entropy is a thermodynamic function that tells us about the degree of disorder of a particular system. It is represented using the letter “S”.
The change in entropy of a system is given by the following equation
ΔS = ΔH/T
Here ΔH is the heat released
T is the temperature of the system
In the given case, glucose is given.
The value of ΔH for one-mole glucose is 2808 kJ/mol.
The mass of one-mole glucose is 180 g, therefore 100 g of glucose has
ΔH = 2808/180 x 100 = 1560 kJ/mol.
Putting ΔH= 1560 kJ and T= 37° C = 310 K in the above equation
ΔS = 1560/310
ΔS = 5.03 kJ/K
Thus, the change in entropy of our body will be 5.03 kJ.
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isn't the activity in Bq
3.35 kg N2O5
Express your answer using three significant figures.
Please help me! explain the steps for better understanding.
Answer:
31.0
Explanation:
Lets convert to grams
3.35 x 1000 = 3350 grams of N2O5
3350 / molar mass of N2O5 (108 grams) = 31.0 moles
What is generally true about the compressibility of solids
solids are not compressible, this is why it has a fixed shape
1. Which of the following is NOT made of cells?
a. bacteria
b. leaf
C. sand
d. snail
Answer:
Sand is not made of cells
Answer:
C. sand
Explanation:
Bacteria is living so it is made of cells. A leaf is living so it is also made of cells. A snail is also a living thing, so it is made of cells. The only thing there that is not living is sand. So sand is not made of cells.
Hope this helps! :)
What is the net force and direction of the airplane?
The net force on the plane is 700 N.
What is force?We know that force is that which causes motion. Force is a vector quantity. This implies that the force force could have both a magnitude and a direction. The direction of force is the area where the force acts towards.
In this case, we have an airplane that is acted upon by three forces;
Wind forceAir frictionForce of the engineTaking the direction of the engine force as positive and the direction of the air friction and the wind force as negative we can now obtain the magnitude of the net force that acts on the plane as;
800 N - ( 40 N + 60 N) = 700N
Hence the net force on the plane is 700 N.
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2
A balloon with a volume of 250.0 ml at sea level has a pressure of 760.0 mm of Hg.
The balloon is released and it climbs to a level with a new pressure of 600.0 mm of Hg.
What is the new volume of the balloon? [Difficulty 1]
The final volume of the balloon will be 316.6 ml
Given,
V1= 250 ml
P1= 760 mm Hg
V2=?
P2= 600 mm Hg
From the given question, the final volume can be calculated using Boyle's law.
The link between a gas's pressure, volume, and temperature is shown by Boyle's law. It asserts that under constant temperature, a gas's pressure is inversely proportional to its volume.
Boyle's law is valid only for ideal gas.
Pressure and volume are represented by a rectangular hyperbola on the graph.
P ∝ 1/V or PV = K
∴P1 x V1 = P2 x V2
⇒ 250 x 760 = 600 x V2
⇒190000 = 600 x V2
⇒190000/ 600 = V2
⇒V2 = 316.6 ml
Hence, the new volume of the balloon will be 316.6 ml.
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A book is pushed off the edge of a table. At what point during the fall will the potential and kinetic energy be equal? A. 1/4 of the way down B. 1/2 of the way down C. 3/4 of the way down D. right before it hits the ground
The point during the fall will the potential and kinetic energy be equal is B. 1/2 of the way down.
How to illustrate the information?It should be noted that the point when the potential and kinetic energy be equal will be at the midpoint of the initial height.
Therefore, the object possesses potential energy when at rest and then kinetic energy when in motion.
When KE = PE
We can deduce that KE+PE = MGH and PE+ PE = MGH
This implies that MGH + MGH= 2MGH and 2H = H
Therefore, the point during the fall will the potential and kinetic energy be equal is B. 1/2 of the way down.
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What is the actual, significant effect of 2,3-bisphosphoglycerate on oxygen binding by hemoglobin?
The actual, significant effect of 2,3-bisphosphoglycerate on oxygen binding by hemoglobin is Kd for oxygen increases in peripheral tissues.
Kd is a dissociation constant.
A lower dissociation constant (Kd) means tighter binding of oxygen.
When 2,3-bisphosphoglycerate (2,3-BPG) levels increase, hemoglobin release oxygen.
2,3-Bisphosphoglycerateis a three carbon isomer of the glycolytic intermediate 1,3-bisphosphoglycerate. It is present in human red blood cells (erythrocyte).
2,3-bisphosphoglycerate interacts with deoxygenated hemoglobin and decrease his affinity for oxygen, so it allosterically promotes the release of the remaining oxygen molecules.
2,3-bisphosphoglycerate promotes oxygen release in peripheral tissues.
Hemoglobin is the oxygen-transport metalloprotein in erythrocytes that contains iron ions.
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What is the ph at the equivalence point in the titration of 100 ml of 0.10 m hcn with 0.10 m naoh?
The ph at the equivalence point in the titration of 100 ml of 0.10 m HCN with 0.10 m NaOH is 11.04.
To ascertain the concentration of an identified analyte, titration is a typical laboratory technique for quantitative chemical analysis. A standard solution with a known concentration and volume is prepared as the reagent, also known as the titrant or titrator.
The food business uses titration extensively as an analytical method. It enables food producers to estimate the concentration of a reactant in a sample. For instance, it can be used to determine a food's salt or sugar content or the amount of vitamin C or E, which affects the color of the product.
[tex]HCN + OH^{-}[/tex] →[tex]H_{2}O + CN^{-}[/tex]
At the equivalence point, 10 mmol of cyanide ions are held in 200 mL of solution.
[[tex]CN^{-}[/tex]] = 10 mmol/200 mL = 0,05 M
Kb = [tex]\frac{ 1.0E^{-14} }{4.9E^{-10} }[/tex]
Kb = 2.0E-5 corresponding to [tex]CN^{-}[/tex] + [tex]H_{2}O[/tex]= HCN + [tex]OH^{-}[/tex]
Kb =[tex]\frac{[HCN][OH^{-}}{CN^{-}}[/tex]
y=0.0011 M =[[tex]OH^{-}[/tex]]
pOH = 2.96
pH = 14.00 - pOH = 11.04
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A red glaze on porcelain can be produced by using mnso4. what is the name of the compound?
The name of the compound is manganese (II) sulfate.
In most cases, the inorganic compound with the formula [tex]MnSO_{4} . H_{2} O[/tex] is referred to as manganese(II) sulfate. A manganese(II) salt with great commercial value is this light pink deliquescent solid. For purposes that are compatible with sulfates, manganese sulfate is a relatively water- and acid-soluble manganese source.
When a metal is substituted for one or both of the hydrogen atoms in sulfuric acid, salts or esters known as sulfate compounds are created.
Blacks, browns, and purples are produced through the use of manganese as a coloring agent in bodies and glazes. Most glaze melts can easily dissolve smaller amounts of manganese; however, at concentrations above 5%, the manganese will precipitate and crystallize. Metallic surfaces are likely when a glaze contains a lot of metal (like 20%).
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Sugar is easily soluble in water and has a molar mass of 342.30 g/mol. what is the molar concentration of a 265.7 ml aqueous solution prepared with 74.2 g of sugar?
The molar concentration of the sugar solution is 0.815M
The best approach to describe a solute concentration in a solution is by molar concentration. According to the formula M = mol/L, molarity is defined as the total number of moles of solute dissolved in one litre of solution.
Given:
Mass, m = 74.2g
Molar mass, mm = 342.30g/mol
Volume, v = 265.7ml
To find:
Molar concentration, M = ?
Formula:
Molar concentration, M = mole / dm^3 of solution
Calculations:
No. of moles = Mass, m / molar mass, mm
No. of moles = 74.2 / 342.3
No. of moles = 0.216 mol
Molar concentration, M = 0.216 / 0.265
Molar concentration = 0.815M
Result:
The molar concentration of the sugar solution is found to be 0.815M
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8. For water, propane, and carbon dioxide, compare the heat of fusion to the heat of
vaporization. What patterns do you see? Do you think these patterns hold true for
other substances as well? Why is vaporization greater than fusion in every case?
The heat of vaporization is always greater than the heat of fusion because gas molecules have the largest intermolecular space and lowest intermolecular interaction.
What is latent heat?The term latent heat refers to the kind of heat that can not be detected hence the term ‘latent’. It is the heat that does not lead to temperature change. Rather the heat energy is used to break up the secondary bonds that hold the molecules and the bonds that hold the substance together in order to free the molecules of the substance.
Now if we consider water, propane, and carbon dioxide. We could see that water has the strongest intermolecular force followed by carbon dioxide and then propane. This is because water molecules are held together by hydrogen bonds while the propane molecules are only held together by the weak Van Der Walls forces.
We can now see that when we compare the heats of heat of fusion to the heat of vaporization, the heat of vaporization is always greater than the heat of fusion because gas molecules have the largest intermolecular space and lowest intermolecular interaction.
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There are three stable forms of neon: neon-20, neon-21, and neon-22. Which statement is true?
A) The number of neutrons are the same.
B) Their number of protons differ.
C) They are radioactive, like all isotopes.
D) Their atomic masses differ.
Looking at the forms of neon in the question as shown, we can see that; their atomic masses differ. Option D
What are isotopes?The term isotopes has to do with the atoms that have the same atomic number but do not have the same mass number. The mass number is the sum of the number of protons and the neutrons. Given that the number of protons is a constant and it is the identity of the element, we are now left with the understanding that the difference between the mass numbers of the isotopes must stem from the very given fact that the neutrons that are found in the both isotopes are just not of the same number.
Having said all of these, we could now look at the isotopes that we have which are the isotopes of neon that have all been labeled as; neon-20, neon-21, and neon-22.
Following from the explanations that have been afore given above, we could easily arrive at the conclusion that; their atomic masses differ.
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Life relies on two key reactions: the oxidation of glucose to produce co2 and water and the reaction of co2 and water to produce glucose. these reactions are?
These reactions are exergonic and endergonic.
An exergonic is spontaneous reaction. It occurs without the addition of external energy. ΔG (the change in Gibbs free energy) is negative.
An endergonic reaction requires free energy to proceed. ΔG (the change in Gibbs free energy) is positive.
Balanced chemical equation for reaction of the oxidation of glucose:
C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + energy
C₆H₁₂O₆ is molecule of glucose
O₂ is molecule of oxygen
Balanced chemical equation for reaction of the production of glucose:
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂.
Plants convert solar energy into the chemical energy of sugars.
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What is the force required to accelerate a 10 KG object at 1 M/S/S
PLEASE I REALLY NEED THIS RN PLEASE
The force required to accelerate a 10 kg object at 1 M/S/S is 10 N.
What is force?Force is defined as an action that has the capability of changing the motion of an object.It has both magnitude as well as direction owing to which it can be described as a vector quantity.
It's SI unit is Newton and is represented by symbol F.It can be measured by instruments named force gauge,spring scale and load cell.It is an external agent which can change the body's state of motion or rest.
There are two types of forces
1) contact force
2)non-contact force
Force is calculated by the formula,
F=m×a
where m=mass and a=acceleration
In the given problem ,m=10 kg and a=1 ms[tex]^-2[/tex]
substituting the values in the formula,
F=10×1=10 N.
Thus, the force acting on object of 10 kg is 10 N when acceleration is 1 ms[tex]^-2[/tex].
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Sarah measures out 151 grams of SO2. How many moles is this? Express your answer to three significant figures.
151 grams of SO2 is equal to
moles.
Answer:
151 g SO₂ × [1 mol SO₂/64.06 g SO₂] = 2.36 mol SO₂
Explanation:
Answer:
2.36
Explanation:
got ir right on plato
Please help
1. What do you know already about the reactions of metals with water, acids and with the air (oxygen)?
2.Is it unusual for a metal to react with cold water (H20) ?
3.Is it usual for a metal to react with dilute hydrochloric acid? If it is, what are the products of the reaction (think coursework ...
magnesium and hydrochloric acid)
4. Is it usual for a metal to react with air / oxygen? If it is, what type of product forms?
Answer:
1: A salt plus hydrogen gas
2: Yes, the metals which react with cold water are; sodium, calcium and potassium. Magnesium does not react with cold water. Metals like aluminum, iron and zinc do not react either with cold or hot water. Metals such as lead, copper, silver and gold do not react with water at all.
3: There is no reaction between dilute hydrochloric acid or sulfuric acid and the metals below hydrogen in the reactivity series.
4: Yes. The product that forms is called rust.
Which equation is balanced? mg3n2 h2o 3mgo 2nh3 c3h8 5o2 h2o 3co2 zn 2hcl zncl2 h2 3h2so4 2fe fe2(so4)3 h2
The balanced chemical equation is [tex]Zn + 2HCl[/tex] → [tex]ZnCl_{2} + H_{2}[/tex] .
The given chemical equation [tex]Mg_{3} N_{2} + H_{2}O[/tex] → [tex]3MgO + 2NH_{3}[/tex] is not a balanced chemical equation because number of hydrogens and oxygens are not same on both sides. Balanced chemical equation for this reaction will be [tex]Mg_{3} N_{2} + 3H_{2} O[/tex] → [tex]3MgO + 2NH_{3}[/tex]..
The given chemical equation [tex]C_{3} H_{8} + 5O_{2}[/tex] → [tex]H_{2} O + 3CO_{2}[/tex] is not a balanced chemical equation because number of hydrogens and oxygens are not same on both sides. Balanced chemical equation for this reaction will be[tex]C_{3} H_{8} + 5O_{2}[/tex] → [tex]4H_{2} O + 3CO_{2}[/tex].
The given chemical equation [tex]Zn + 2HCl[/tex] → [tex]ZnCl_{2} + H_{2}[/tex] is already a balanced chemical equation.
The given chemical equation [tex]3H_{2} SO_{4} + 2Fe[/tex] → [tex]Fe_{2} (SO_{4} )_{3} + H_{2}[/tex] is not a balanced chemical equation because number of hydrogens are not same on both sides. Balanced chemical equation for this reaction will be [tex]3H_{2} SO_{4} + 2Fe[/tex] → [tex]Fe_{2} (SO_{4} )_{3} + 3H_{2}[/tex] .
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What is the mass (in grams) of a material that has a density of 2.69 g/mL and a volume of 13.4 mL?
The mass (in grams) of the material that has a density of 2.69 g/mL and a volume of 13.4 mL is 36.046 g
What is density?The density of a substance is simply defined as the mass of the subtance per unit volume of the substance. Mathematically, it can be expressed as
Density = mass / volume
With the above formula, we can determine the mass of the material. Details below
How to determine the mass of the materialThe mass of the material can be obtained as illustrated below:
Density of material = 2.69 g/mLVolume of material = 13.4 mLMass of material =?Density = mass / volume
Cross multiply
Mass = Density × Volume
Mass of material = 2.69 × 13.4
Mass of material = 36.046 g
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Which is a characteristic of the electron sea model for metallic bonding? molecular orbitals overlap to produce bands. electrons flow easily between metal nuclei. electrons are in fixed positions in the orbitals. atomic nuclei are arranged in an irregular pattern.
Atomic nuclei are arranged in a regular pattern is a characteristic of the electron sea model for metallic bonding.
The electron sea model is a popular model for metallic bonding. In this model, atoms are arranged in a regular pattern and each atom has a "sea" of electrons around it. This sea of electrons is responsible for the metallic bond.
The main advantage of the electron sea model is that it can explain the properties of metals very well. For example, why metals are good conductors of electricity and heat.
One of the drawbacks of the electron sea model is that it doesn't explain why some metals are magnetic. This is because the model assumes that all of the electrons are in the same orbital and spin in the same direction. However, we know that some electrons do spin in the opposite direction, which creates a magnetic field.
Overall, the electron sea model is a good way to understand the basics of metallic bonding. However, it doesn't explain everything and there are some limitations to the model.
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Answer:
Electrons flow easily between metal nuclei
Explanation:
Practice another a small mailbag is released from a helicopter that is descending steadily at 1.63 m/s. (a) after 5.00 s, what is the speed of the mailbag?
After 5.00 s, the speed of the mailbag is 50.63 m/s.
v = 1.63 m/s; the initial speed of a small mailbag
a = 9.8 m/s²; the acceleration of a small mailbag
t = 5.00 s; time
Ending speed is defined as the speed attained by a body after completing distance at certain time interval:
v(ending speed) = v(initial speed) + a × t
v(ending speed) = 1.63 m/s + 9.8 m/s² · 5.00 s.
v(ending speed) = 50.63 m/s
Velocity is equivalent to a specification of its speed and direction of motion, for example 100 km/h to the east.
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Current of 4.59 a is passed through a fe(no3)2 solution for 1.80 h . how much iron is plated out of the solution?
8.6057 g iron is plated out of the solution.
The process of depositing a layer of one metal over the surface of another metal by passing electric current is called electroplating. Electroplating of metals is done to protect them from corrosion and for decoration purpose. For example, the vessels of iron are electroplated with copper or silver or gold to make it attractive and to protect from rusting.
Given,
Current = 4.59 A
Time = 1.80hr
Given solution is Fe(NO3)2
Now,
we have to find out the iron which is plated out of the solution
So,
(4.59 C/sec) (6480 sec) = 29,734.2
29,734.2 C / 96485 C/mol =0.3082 mole of electrons passed
Fe2+ + 2e- ---> Fe
0.3082 mol e- / 2 mol e- per mole Fe = 0.1541 mol Fe
(0.1541 mol) (55.845 g/mol) = 8.6057 g.
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Which amino acid residue's backbone forms a hydrogen bond with the backbone of the third (3rd) residue?
Amino acid 7 residue's backbone forms a hydrogen bond with the backbone of the third (3rd) residue.
What are amino acids?
An amino acid is an organic molecule composed of a basic amino group (NH 2), an acidic carboxyl group (COOH), and an organic R group (or side chain) that is unique to each amino acid. Informally, an amino acid is alpha-amino [alpha-amino] carboxylic acid.
The hydrogen atoms on both of the leftover groups must be bound to electronegative atoms for hydrogen bonding to take place between the residual molecules of the second molecule. Fluorine, oxygen, nitrogen, and chlorine are some of these atoms. These atoms have the capacity to impart a charge on the hydrogen atom, enabling hydrogen bonding.
Amino acid 7 residue's backbone forms a hydrogen bond with the backbone of the third (3rd) residue.
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When water dissolves a substance, weak charges on water molecules attract oppositely charged portions of the substance, pulling them out into solution. Which property of water accounts for this occurrence?.
Sample of sodium reacts completely with 497 g of chlorine, forming 819 g of sodium chloride. what mass of sodium reacted?
360.87g of sodium reacted with 497g of chlorine to form 819g of sodium chloride (NaCl).
Chlorine and sodium react to form sodium chloride (NaCl). Below is the balanced reaction:
Cl2 + 2Na = 2NaCl.
1 mole of Na interacts with 1 mole of Cl2 to create 2 moles of NaCl. Sodium's atomic mass is 23 and chlorine's molar mass is 71, while sodium chloride's molar mass is 58.5.
As a result, the reaction between 46g Na and 71g Cl2 yields (2 X 58.5)g = 117g of NaCl. Na fully interacts in response to the question, indicating Na as the limiting reactant. Thus, the amount of Na that reacts is equal to the amount of NaCl that is created.
Produced NaCl = 819g = (819/58.5) moles = 15.69 moles. The amount of Na that reacted was 15.69 moles = 15.69 X 23g = 360.87g.
Result:
Amount of Na reacted is 360.87g.
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Uring oxidative phorphorylation, atp is produced as hydrogen ions move from across the innermembrane from the ________ to ___________
During oxidative phosphorylation, ATP is produced as hydrogen ions move from across the innermembrane from the matrix to intermembrane space.
Oxidative phosphorylation is the process in which adenosine triphosphate (ATP) is synthesed.
It is generating 36 ATP molecules per one molecule of glucose.
This process consume oxygen and it is coupled to the movement of electrons through the mitochondrial electron transport chain.
Movement of hydrogen ions makes proton concentration gradient between the intermembrane space and the matrix, which is used for production of ATP (see the picture below).
There are four protein complexes in the innermembrane involved in transport of protons and electrons.
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Just question 2 pleasee
The correct matching of the properties of the elements are;
Rubidium - catches fire as soon as it s exposed to air and burns fiercely
Lithium - hard to set alight but burns with a deep red flame
Potassium - Melts readily on heating with a Bunsen flame and catches fire easily. Burns with a mauve flame.
Sodium - Melts fairly readily with Bunsen flame then catches fire and burns with a deep yellow flame
What are the properties of the elements?We know that elements are classified into groups. The groups are a family of elements that have similar chemical and physical properties. Now we have the to match the properties of the elements as shown;
Rubidium - catches fire as soon as it s exposed to air and burns fiercely
Lithium - hard to set alight but burns with a deep red flame
Potassium - Melts readily on heating with a Bunsen flame and catches fire easily. Burns with a mauve flame.
Sodium - Melts fairly readily with Bunsen flame then catches fire and burns with a deep yellow flame
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Define Projectile:
A projectile is launched with an initial horizontal velocity from a cliff and follows a parabolic path to the ground. Predictable unknowns include the initial speed of the projectile, the initial height of the projectile, the time of flight, and the horizontal distance of the projectile.
A projectile is launched with an initial horizontal velocity from a cliff and follows a parabolic path to the ground and include the initial height of the projectile
Projectile is a body projected by external force and continuing in motion by its own inertia and the velocity is constant horizontally it means that means the acceleration is zero and initial vertical velocity is zero projectiles travel with a parabolic path due to the fact that the downward force of gravity accelerates them downward from their straight-line gravity-free
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What volume in ml of 0.05 m h2so4 can be prepared from 2.5 g h2so4 and sufficient water?
12.5 volume in ml of 0.05 m Sulphuric can be prepared from 2.5 g sulphuric acid and sufficient water.
What is Volume?
Volume is a measurement of three-dimensional space that is occupied. It is frequently expressed numerically using imperial or SI-derived units. Volume and the notion of length are connected.
As a result, we can observe that 0.5 moles of sulphuric acid are required to neutralise 1 mole of NaOH. Now let's figure out how much NaOH is specified.
NaOH is assumed to weigh 2.5 g.
NaOH has a molar mass of 40 g.
=> 62.5 millimoles of NaOH are equal to 2.540 moles.
The required amount of sulfuric acid is 62.5/2 millimoles, or 31.25 millimoles.
We now understand that millimoles equal molarity times volume (in ml)
replacing the specified values,
31.25 = 2.5 * V
=> V = 12.5 ml
As a result, 12.5 cc of sulfuric acid is needed.
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