Answer:
according to the Oxford dictionary, metallurgy the branch of science and technology concerned with the properties of metals and their production and purification
Explanation:
Explanation:
The entire scientific and technological process used for isolation of the metal from its ores is known as metallurgy.
Hey stan.
Hope it's help ^_^
What is the most common irony?
In literary classes, the three most popular types are verbal irony, dramatic irony, and situational irony. When a speaker or narrator says something that contradicts what they mean, what they intend, or what the context necessitates, this is called verbal irony.
What is irony?One thing is expressed while another is meant in an ironic statement. For example, on a chilly, wet gray day, you would exclaim, "What a gorgeous day!" Alternatively, if you were suffering from a severe case of food sickness, you may respond, "Wow, I feel terrific today." "ffers points of view and ideas that are, at most, intriguing... However, it does not reach the truth." Ronagh and Souder are particularly concerned with scientific assertions that are not meant to be taken seriously.
Here,
The three most common varieties in literary studies are verbal irony, dramatic irony, and situational irony. Verbal irony occurs when a speaker or narrator says something that contradicts what they mean, what they intend, or what the context requires.
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How many moles are there in 10g?
Answer:
0.25 moles
Explanation:
Why is it important to recycle electronic waste?
It saves energy, minimizes air and water pollution, cuts greenhouse gas emissions, and protects natural resources. Stanford recycled, composted, and otherwise decreased its trash by 62% and reduced landfill by 35%.
What is recycle?It saves energy, minimizes air and water pollution, cuts greenhouse gas emissions, and protects natural resources. Stanford recycled, composted, and otherwise decreased its trash by 62% and reduced landfill by 35%. The process of transforming waste resources into new materials and things is known as recycling. This notion frequently includes the recovery of energy from waste materials. The capacity of a material to regain the attributes it had in its original form determines its recyclability. Recycling is the collection and processing of items that would otherwise be discarded as waste in order to create new goods. Recycling may help your town, economy, and environment.
Here,
It saves energy, decreases air and water pollution, lowers greenhouse gas emissions, and protects natural resources. Stanford recycled, composted, and avoided landfill by 62% and 35%, respectively.
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Identify the Lewis acid in the following reaction: Pt2+(aq) + 4NH3 (aq) ? Pt(NH3)4,2+(aq)
a) Pt2+
b) NH3
c) Pt(NH3)4,2+
The Lewis acid in the following reaction: Pt2+(aq) + 4NH3 (aq) ?Pt(NH3)4,2+(aq) is : a) Pt2+.
What do you understand by a Lewis acid?Platinum ion (Pt2+) ( P t 2 + ) is a Lewis acid in the given reaction because it accepts pair of electron from ammonia.
A Lewis acid is any substance, such as H+ ion, that can accept a pair of nonbonding electrons. In other words, Lewis acid is an electron-pair acceptor. Lewis acid is chemical species that has an empty orbital which is capable of accepting electron pair from Lewis base to form a Lewis adduct.
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15.0 L of an ideal gas at 298 K and 3.36 bar are heated to 350 K with a new pressure of 4.90 atm. What is the new volume in litres
The new volume in litres is 13.29 L.
Given,
Temperature 1 (T₁) = 298 K
Volume 1 (V₁) = 15 L
Temperature 2 (T₂) = 383 K
Pressure 1 (P₁) = 3.36 atm
Pressure 2 (P₂) = 4. atm
By Ideal Gas Equation,
P₁V₁/T₁ = P₂V₂/T₂
⇒ (3.36*15)/298 = (4.90*V₂)/383
⇒50.4/298 = 4.90V₂/383
⇒ (50.4*383) / (298*4.90) = V₂
⇒ 19303.2/1460.2 = V₂
⇒13.29 L = V₂
New Volume will be 13.29 L.
Ideal gas law is a precise approximation of the behavioral of several gases under various situations in thermodynamics. The Ideal Gas Equation is a mathematical formula that combines empirical laws such as Charle's law, Boyle's law, Gay-law, Lussac's and Avogadro's law.
The equation characterizing the states of hypothetical gases stated mathematically by combinations of empirical or physical constants is known as the Ideal Gas Equation. It's also known as the universal gas equation. It is defined as follows:
"The ideal gas law seems to be the equation of state for a fictitious perfect gas. It is a decent approximation of the behavioral of various gases under numerous situations, while it has significant limitations".
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The half-life of cobalt-60 is 5.20 yr. How many milligrams of a 1.000-mg sample remain after 7.55 years
Cobalt-60 has a half-life of 5.20 years, which means that half the sample will be present after that time.
What is cobalt?The chemical element cobalt has the atomic number 27 and the symbol Co. It is a naturally occurring hard, glossy, silver-gray metal that is found in rocks and soils. Cobalt is magnetic when it is pure, and it can be used to make alloys, magnets, and colours. Additionally, it is employed in the manufacture of batteries, catalysis, and pharmaceuticals. The production of vitamins and proteins depends on cobalt, a trace mineral that is crucial for maintaining human health.
After 7.55 years, about 0.78 of the original 1.000 mg sample will remain.
Therefore, 0.78 x 1.000 mg = 0.780 mg will remain after 7.55 years.
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A seismograph measures the size of a volcano eruption.
O True
O False
(This is for Science btw)
Answer:
This is true. A seismograph measures the size of a volcano eruption by detecting the vibrations that are produced by the volcanic activity. The vibrations can then be converted into a numerical value that represents the magnitude of the eruption.
Explanation:
Carefully feel the sides of the flask. Is the crystallization of sodium acetate endothermic or exothermic? How do you know?
Answer:
It is not possible to determine whether the crystallization of sodium acetate is endothermic or exothermic simply by feeling the sides of the flask. To determine the heat of crystallization, you would need to measure the temperature of the solution before and after crystallization and compare the two values.
The heat of crystallization is defined as the heat absorbed or released during the process of crystal formation from a solution or a melt. If heat is absorbed during the process, the reaction is endothermic and the temperature of the solution or melt will decrease. If heat is released, the reaction is exothermic and the temperature will increase.
In the case of sodium acetate, it is an exothermic reaction, meaning that heat is released during crystallization and the temperature of the solution will increase. This is because the process of forming the crystal lattice requires the breaking of hydrogen bonds and other intermolecular forces, which releases energy.
Explanation:
Answer:
exothermic
Explanation:
When you crystallize the solution, sodium acetate forms a new bond from the soluble aqueous state ( Na+ and C2H3O2- ) to the solid state (NaC2H3O2). Forming bonds in chemistry is generally an exothermic reaction.
how many liters of water can be made from 55 grams of oxygen gas and an excess of hydrogen at a pressure of 12.4 atm
At a pressure of 12.4 atm and a temperature of 850 c, 8.2 liters of water can be created from 55 grams of oxygen gas and an excess of hydrogen.
first, we need the no.of moles of O2 = mass/molar mass of O2
= 55 g / 32 g/mol
= 1.72 mol
from the balanced equation of the reaction:
2H2 (g) + O2(g) → 2H2O(g)
we can see that the molar ratio between O2: H2O = 1: 2
So we can get the no.of moles of H2O = 2 * moles of O2
= 2 * 1.72 mol
= 3.44 mol
So by substitution by this value in the ideal gas formula:
PV = nRT
when P = 12.4 atm & n H2O = 3.44 mol & R= 0.0821 & T = 85 + 273=358K
12.4 atm *V = 3.44 * 0.0821 * 358 = 8.15 L
∴ V ≈ 8.2 L
In the physical sciences, pressure is defined as the perpendicular force per unit area or stress at a point within a confined fluid. The pressure exerted on a floor by a 42-pound box with a bottom area of 84 square inches is equal to the force divided by the area over which it is exerted, or one-half pound per square inch.
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The movement of the liquid in a thermometer shows changes in temperature. An increase in temperature indicates the molecules in the liquid (A) moved slower and closer together (B) contracted in size when heated (C) moved faster and spread farther apart (D) expanded in size when heated
(C) moved faster and spread farther apart
An increase in temperature indicates the molecules in the liquid move faster and spread farther apart. The mercury thermometer was named after physicist Daniel Gabriel Fahrenheit in Amsterdam. Mercury thermometers are useful in many ways such as measuring body, liquid, and vapor temperature. The movement of the liquid in a thermometer shows changes in temperature. With an increase in temperature shows the molecules in the liquid are moving faster and the temperature is rising in the thermometer. The mercury expands to indicate a higher temperature up the tube which is marked in order to recognize a measurement of temperature. Mercury thermometers are rare today as most of them are toxic nowadays. A Mercury thermometer consists of a bulb containing mercury attached to a glass tube; the volume of mercury in the tube is much less than the volume in the bulb.
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The_____gene shows up even when inherited only from one parent.
Answer:
The Alleles gene shows up even when inherited only from one parent
Explanation:
The two alleles in a gene pair are inherited, one from each parent. Alleles interact with each other in different ways. These are called inheritance patterns.
i hope this helped
What is the relationship between CO2 and O2 for sea urchins?
The relation between CO₂ and O₂ for sea urchins is impacted by the rise in carbon dioxide and oxygen is absorbed from the water.
The exoskeleton of sea urchins, which are found in the ocean, is comprised of calcium carbonate. They create calcium carbonate by absorbing the carbon dioxide from the water. As waste, they discharge carbon dioxide out of the anus.
The sea urchin takes its oxygen from the water. In the canals, oxygen diffuses. Oxygen diffuses into the cells from canals. The ocean's pH may rise as a result of the increased carbon dioxide. A higher pH has a deleterious impact on the calcification process. Therefore, the increased carbon dioxide has an impact on how the larvae and adults of sea urchins calcify.
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a student walks 40 meters east, 20 meters north, 60 meters west and 20 meters south. whats the displacment?
The Correct answer is 50 Meters,Displacement is defined to be the change in position of an object.
What is Displacement?Displacement is the term used to describe the shift in an object's location or the shortest path/length between two places. With such a magnitude and orientation, it is a vector quantity.
Whenever an item travels from location A to location B, its position changes.Displacement=Δx=x f −x 0
x f refers to the value of the final position.x_0x 0 refers to the value of the initial position.Δx is the symbol used to represent displacement.Displacement is a vector. This indicates that it has both a direction and a magnitude, and that it may be visualised as an arrow pointing from the starting location to the ending place.Calculate the Displacement of the ProblemThe student's path fortunately consisted of straight lines and right angles. Therefore we can use the pythagorean theorem to find the distance between where the student's path started and stopped.
A2+B2= C2.
We Give
meters east in for A, 40.
meters north for B 60 .
Distance =40+60+20=110m
Displacement OC= Root of (40 ²+30 ²)
= 50 m
That's the length of the distance between where the student started and where the student ended up.
A2 plus B2 equals C2. We plug 30. meters east in for A, and 40. meters north for B. 30. meters squared plus 40. meters squared equals 2500 meters2. Then we take the square root of that number and get 50. meters.
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Which of the following geometries for the complex ion [Co(en)(H2O)4]2+ are possible?
Check all that apply
O trigonal bipyramidal or square pyramidal
O octahedral
O linear
O tetrahedral or square planar
O trigonal planar
Geometry for the complex ion [Co(en)(H2O)4]2+ that are possible is : Octahedral.
What is octahedral molecular geometry?A compound with six atoms or groups of atoms or ligands grouped symmetrically around a central atom and defining the vertices of the octahedron represents the shape of an octahedron in chemistry and is known as an octahedral molecular geometry (also known as a square bipyramid).
The prefix is octa because the octahedron has eight faces. Octahedral bond angle values between 90° and 180° are what determine the octahedral shape. The angles between each of the four atoms that make up the square bases of the two pyramids of the octahedral structure and one of the apex atoms are both 90 degrees.
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The normal boiling point of Br2(l) is 58.8 ?C, and its molar enthalpy of vaporization is ?Hvap = 29.6kJ/mol.
When Br2(l) boils at its normal boiling point, does its entropy increase or decrease?
increase
decrease
When Br2(l) boils at its normal boiling point, its entropy increases as it is positive.
What is meant by entropy?The level of randomness found inside a substance's molecules is known as entropy.
The temperature at which atmospheric pressure and a liquid's vapor pressure are equal is known as the boiling point.
The amount of heat energy required to convert one mole of a substance from its liquid state into its gaseous state at constant temperature and pressure is referred to as the molar enthalpy of vaporization.
Entropy increases when a liquid is heated because the randomness between the molecules increases. As a result, entropy will rise.
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Tooth enamel, or hydroxyapatite, is an essential part of the tooth structure. Its composition is 39. 8% calcium,
18. 5% phosphorous, 41. 43% oxygen, and 2% hydrogen. What is the empirical formula? It has a molar mass of
1004 g/mol. What is the molecular formula of this compound?
The empirical formula of this compound is Ca3(PO4)2.
What is an Empirical formula?
An empirical formula is a type of chemical formula that shows the simplest ratio of atoms in a molecule, rather than the total number of atoms. It is the simplest possible chemical formula that shows the relative numbers of each type of atom in a molecule.
The molecular formula is Ca3(PO4)2•H2O, which indicates that the compound is composed of three calcium atoms, two phosphate atoms, and two water molecules. The molar mass of this compound is 1004 g/mol, which is two times the molar mass of the empirical formula (502 g/mol). Therefore, the molecular formula of this compound is Ca3(PO4)2•H2O.
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How many cm is meter stick?
100 cm is meter stick.
Centimeter is denoted by the (cm). It is a metric unit of the measurement which is used for measuring the length of an object.
Meterstick is a foldable ruler which is used to measure the length, and it is common in the construction industry. They are made up of wood or plastic and often they have a plastic or metal joints so that they can be folded together.
A meter measuring stick, which is one meter (39.37 inches) long, it contains 100 centimeters. Thus, centimeter is equal to one-hundredth of a meter. The word centimeter comes from the late 18th-century. The word centimeter derived from the Latin root "centum"/ means "hundred" and the Greek root "metron", meaning "measure".
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if you start with 5 grams of carbon on the reactant side how many grams of carbon should you start with
Based on the provided information, the number of grams of carbon should you end with is 5g.
If you start with 5 grams of carbon on the reactant side, the grams of carbon you should end with 5g based on the law of conservation of mass. The law of conservation of mass, also known as principle of mass conservation postulate that for any system closed to all transfers of matter and energy, the system mass must remain constant over time, as the mass of system cannot change, so quantity can neither be added nor be removed. Hence, the law states that mass is neither created nor destroyed in a chemical reaction. Hence, the grams of reactants that one starts with, one will end with the same amount. Chemicals recombine to give a different compound in the product, the mass is still always conserved.
Note: The question is incomplete. The complete question probably is: If you start with 5 grams of carbon on the reactant side, how many grams of carbon should you end with?
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diatomic elements are important. what makes them different from other elemental substances?
Atoms follow the octet rule, which makes them more stable in pairs.
The diatomic elements oxygen and nitrogen have a slightly more complex structure. There is a double bond between the two O atoms in the O₂ dot structure. And there is a triple bond between the two N atoms in the N₂ dot structure. Diatomic elements are elements that are never found alone in nature. It is always bound to another atom. The diatomic state of this atom is much more stable than its unbonded state.
Everything around us contains energy, even if it doesn't move. All molecules and atoms have spins and vibrations, but these are all internal forces.
All atoms try to reach the lowest potential. Atom has a state of lower energy, implying maximum stability under certain external conditions.
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Determine whether each of the following compounds is a molecular compound or an ionic compound. How can you tell?
a. ) PBr₃
b. ) KBr
c. ) Iron (III) Oxide
d. ) Carbon Tetraiodide
PBr₃ and Carbon Tetraiodide is a covalent compound. Whereas, KBr and Iron (III) Oxide is an ionic compound.
Covalent compounds and molecular compounds are those compound where two non-metals, or a non-metal are bonded to each other through the sharing pair of electrons.
PBr₃ are covalent because phosphorous is in the column 3 in periodic system and it has three valence electrons in its outer shell. Therefore, in case of Carbon Tetraiodide carbon and iodide both are non-metals that why they are covalent compounds.
KBr and Iron (III) Oxide both are Iron (III) Oxide because they are formed by the interaction between a metal and non-metal. They will transfer the electrons from positively to negatively charged atoms.
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Explain the similarities and differences between putting a beaker of ethanoic acid in the refrigerator and mixing it with sodium carbonate. Use these words: chemical,physical, reversible, irreversible.
When a beaker of ethanoic acid is placed in the refrigerator and mix it with sodium carbonate, its temperature drops down and endothermic reaction take place.
[tex]2CH_{3} COOH + NaCO_{3}[/tex] ⇒ [tex]CH_{3}COONa + NaHCO_{3}[/tex]
This chemical reaction is a reversible reaction.
Similarities:Ethanoic acid and sodium carbonate combine to form an endothermic reaction that results in fizzing as carbon dioxide is released and heat is lost to the environment, making the reaction vessel feel chilly to the touch.
Differences:The difference between adding sodium carbonate to the solution and refrigerating ethanoic acid is that no new substance is created in the former. When the substance is taken out of the refrigerator, it is still ethanoic acid. New chemicals are created in the latter scenario. Because of a chemical process, the material is no longer ethanoic acid.
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Please help me thank u sm
The amount of suplher in grams to rpoduce 25.9 kJ energy= 10.95g
Here the reaction is,
S(s) + 2CO(g)
Hrxn=-75.8 kJ energy.
Answer,
The amount of Sulpher in grams to produce 25.9 kJ energy= xg=?
We know that 1mole Sulpher results in the production of \ bigtri angle up Hrxn=75.8 kJ/mol energy.
25.9 kJ of energy produced from how many grams of sulpher= 25.9 kJ / 75.8 kJ/mol = 25.9g/75.8g/mol
=0.34 mol of sulpher
The amount of 0.34 moles of sulpher in grams= Number of moles * Molar mass
( Molar mss of Sulpher= 32.06g'/mol)
= 0.34mols * 32.06g /mol
=10.95 g
The amount of suplher in grams to rpoduce 25.9 kJ energy= 10.95g
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If the mass of the products (AlCl3 and Cu) are 146g total and the mass of CuCl2 on the reactant side is 126 grams, what is the mass of Al
Your limiting reagent will be copper (II) chloride. The mole ratio is the most crucial tool you'll have to tackle this problem, or any other stoichiometry problem, for that matter.
Keep in mind that in order to make 3 moles of copper from 3 moles of copper (II) chloride, you need 2 moles of aluminum. Unbalanced reaction: Al(s)+HCl(aq) AlCl3(aq)+H2(g). Cl. Balance On the product side there are three Cl atoms and on the reactant side there is one. There is only one hydrogen atom on the reactant side and two on the product side of the reaction Mg + HCl MgCl 2 + H 2. The equation is therefore unbalanced.
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Find Delta S for the formation of 1 mole of PCl5(g) from its elements.
____ J/K
Answer:
I don't know I am sorry
Iron has a BCC crystal structure, an atomic radius of 0. 124 nm, and an atomic weight of 55. 85 g/mol. Compute its theoretical density
Iron has a BCC crystal structure, an atomic radius of 0. 124 nm, and an atomic weight of 55. 85 g/mol. its theoretical density is 7.9 g /cm³.
The molar mass of the iron = 55.85 g/mol
The atomic radius = 0.124 nm
the edge length is given as :
a = (4r) / √3
a = ( 4 × 0.124 × 10⁻⁷ cm ) / √3
a = 2.86 × 10⁻⁸ cm
The density is given below :
density = ( Z × M ) / Na × a³
density = ( 2 × 55.85 ) / (6.023 ×10²³) × ( 2.86 × 10⁻⁸ )
density = 7.9 g/cm³
Thus the theoretical density is 7.9 g/cm³.
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What are the 3 types of elements?
The three types of elements are metals, non-metals as well as metalloids, there are placed in a periodic table.
In a periodic table, metals are placed in s-block and d-block. While non-metals as well as metalloids are placed in p-block. Metals are generally lustrous, malleable as well ductile in nature and are usually hard in nature while non-metals lack these properties. Metalloids are the elements whose chemical as well as physical properties lies between both metals and non-metals. Examples of metals are sodium and potassium. Examples of non-metals are carbon and phosphorus while examples of metalloids are silicon and germanium.
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Would greatly appreciate the help
9.0 mol Na2S reacts with 8.0 mol
CuSO4 according to the equation below:
Na2S + CuSO4
→
Na2SO4 + CuS
Considering only the 8.0 mol CuSO4,
how many moles of CuS form?
? mol CuS
Round your answer to the tenths place.
Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 8.0 mol of CuS form when 8.0 mol CuSO[tex]_4[/tex] reacts.
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. The stoichiometry represents the number of moles.
Na[tex]_2[/tex]S + CuSO[tex]_4[/tex]→ Na[tex]_2[/tex]SO[tex]4[/tex] + CuS
moles of Na[tex]_2[/tex]S =9.0 mol
moles of CuSO[tex]_4[/tex]=8.0 mol
Since CuSO[tex]_4[/tex] is limiting reagent
moles of CuS=8.0 mol
Therefore, 8.0 mol of CuS form when 8.0 mol CuSO[tex]_4[/tex] reacts.
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6.0 mol Al reacts with 4.0 mol O2 to form Al2O3.
4A1+30₂ → 2Al₂O3
How many moles of Al2O3 form when 4.0 mol Al reacts?
2 moles of Al₂O₃ will be produced when 4 moles of Al reacts in accordance with the above equation.
How to calculate moles using stoichiometry?Stoichiometry refers to the study and calculation of quantitative (measurable) relationships of the reactants and products in chemical reactions (chemical equations).
According to this question, 6.0 moles of Al reacts with 4.0 mol of oxygen gas to form Al₂O₃ as follows:
4Al + 30₂ → 2Al₂O₃
Based on the above equation, 4 moles of Al reacts to form 2 moles of aluminium oxide.
This means that 4 moles of aluminium will produce 4 × ²/4 = 2 moles of aluminium oxide.
Therefore, 2 moles of Al₂O₃ will be produced by 4 moles of aluminium.
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Why were the authors interested in determining the strength of the hydrogen bond in solution as opposed to in a vacuum
This is because intermolecular forces have a greater effect in a solution when bonding is present than in a vacuum when bonding is not present.
The attracting and repellent forces that develop between the molecules of a substance are known as intermolecular forces or IMF for short. Individual molecules of a substance interact with one another through the mediation of these forces.
Most of the physical and chemical features of matter are caused by intermolecular forces.
An intermolecular force is an attractive force that develops between the protons or positive parts of one molecule and the electrons or negative parts of another molecule. This force affects a substance's many physical and chemical properties. The strength of a material's intermolecular forces directly relates to the boiling point of that substance; the stronger the intermolecular forces, the higher the boiling point.
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A 50.0 mLmL sample of 0.200 MM sodium hydroxide is titrated with 0.200 MM nitric acid. Calculate the pHpH in the titration after the addition of 60.0 mLmL of 0.200 MHNO3MHNO3 .
A rough estimate of the excess pH of the solution is 1.74.
The answer to the question is that the concentration of NaOH is 0.2 M.
The question also states that the concentration of HNO3 is equal to that of NaOH, which is 0.2 M.
The volumes of sodium hydroxide and nitric acid that are provided to us are 50 mL and 60 mL, respectively. This implies that adding the two will result in the final volume.
= 50 plus 60 equals 110, or 0.11 liters
We know that there is a neutralizing reaction between NaOH and HNO3 based on theory. Then, as a means of answering the question, we record the aforementioned equation.
OH⁻ + H⁺ ---> H₂O
Finally, we apply logarithm to get our final answer
pH = - log [ H⁺ ]
pH = - log [0.01818]
pH = 1.74
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