2 Al&3irons with 2fe and 36copper
assuming similar conditions, how many liters of chlorine gas react to produce 2 l of hydrogen chloride gas?
2 liters of chlorine gas react to produce 2 l of hydrogen chloride gas
We may think about STP.
Gaseous hydrogen chloride in 2 L
PV = nRT
P = 1 atm
V = 2L
n = ?
R = Gas Constant, or 0.0821 L atm K-1 Mol-1.
T = 273
enter and find n in the equation
1 x 2 = n x 0.0821 x 273
n = 08923 mole
An comparable amount of Cl2 gas is required for every 0.08923 mole of hydrogen chloride gas (0.08923 = 0.044615 mole).
as a result, volume of 0.044615 mole of Cl2
P = 1 atm V =?n = 0.044615" T = 273
1 x V = 0.044615 x 0.0821 x 273
V = 1 Lit
Hence Chlorine gas must react to create hydrogen chloride gas, which requires a reaction volume of 2 L.
provide the same amount of 2 Liter
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every chemical reaction proceeds through a high-energy unstable species as reactants are converted to products and bonds are in the process of being formed and/or broken. this unstable species is called a(n) complex or state.
The unstable species is called as transition state.
Transition state in a chemical reaction is a point in the chemical reaction with highest potential or highest energy. This state is said to be the most unstable stage of any chemical reaction and this unstable stage exists between the substrate and the products.
When any chemical reaction takes place the energy of the reaction or the potential of the reaction gradually starts increasing as new bonds are about to form and the old bonds are ready to break. Once the reaction reaches a highest potential point we can see that at this point partial bond braking and partial bond is happening, this is called as the transition state.
As this is the unstable state the reaction starts to loose energy as the product is formed.
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How many total atoms are in 3Ba(NO3)2?
molecular formula: c57h110o6. what is the minimum amount of oxygen required, in g, for complete combustion?
The minimum amount of oxygen required, in g, for complete combustion of C₅₇H₁₁₀O₆ will be 1304 g
Molecular formula = C₅₇H₁₁₀O₆
The amount is not given so we take it as 1 mol
The minimum amount of oxygen required for combustion = ?
First, we will write the chemical equation
C₅₇H₁₁₀O₆ + O₂ = CO₂ + H₂O
Balance the chemical equation
2C₅₇H₁₁₀O₆ + 163O₂ = 114CO₂ + 110H₂O
The molar ratio of C₅₇H₁₁₀O₆ to oxygen is 2 : 163
As we have 1 mol C₅₇H₁₁₀O₆; 163 / 2 = 81.5 mol
number of moles of O₂ required = 81.5 mol
Covert the number of moles to grams
grams = number of moles × molar mass
grams of O₂ required = 81.5 mol × 16 g/mol
grams of O₂ required = 1304 g
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100.0 ml of a 0.840 m solution of kbr is diluted to 500.0 ml. what is the new concentration of the solution?
The concentration of the KBr solution is 0.168 M.
What is molarity?
The quantity of a substance in a given volume of solution is known as its molarity (M). The number of moles of a solute each liter of a solution is known as molarity. The molar concentration of a solution is another term for molarity.
Explanation:
M1V1 = M2V2,
where M1 is the initial concentration,
V1 is the initial volume,
M2 is the concentration,
V2 is the total final volume.
Have to find the initial and final volume of the solution,
V1=100/1000=0.1
V2=500/1000=0.5
By rearranging the above equation, we get
M2=M1V1/V2
=0.840 x 0.1/0.5=0.168 M.
Therefore, the concentration of the KBr solution is 0.168 M.
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Which statement correctly explains how matter is conserved in chemical reactions? (1 point)
A. The number of atoms in the reactants is always equal to the number of atoms in the products.
B. The states of matter of the reactants are always the same as the states of matter of the products.
C. The number of reactants is always equal to the number of products.
D. The number of molecules in the reactants is always equal to the number of molecules in the products.
explain how bones are classified by shape
Bones are classified into Five according to shape namely: Long bones, short bones, flat bones, iregular bones, sesamoid bones.
What is a bone?These are living tissues that contain their own blood vessels and are comprised of different cells, proteins, minerals, and vitamins. They make up the body's skeleton.
Bone classification according to shape:
Long bones: They are long, wide, and cylindrical in shape. They act as leveres e.g Femur, tibia, fibula, metatarsals, humerus, ulna, radius, metacarpals, and phalanges.Short bones: They are thick and cubic in shape. They give support and allow motion. eg. Carpals, tarsals.Flat bones: They appear Thin, and curved. Muscles are attached to them. They protect delicate internal organs.eg. Sternum, ribs, scapulae, and cranial bones.Irregular bones: They have complex shaped and also protect internal and delicate organs. eg. Vertebrae, facial bones.Sesamoid bones: They are small, round and are seen in tendons. They guard the tendons against the force of compression. eg. Patellae.Learn more about Bones on https://brainly.com/question/24169840
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In Spain, the legal blood alcohol limit is 250 of alcohol per 1 L of breath. What is this alcohol concentration in parts per billion, ppb?
The alcohol concentration in parts per billion, ppb given that the alcohol limit is 250 of alcohol per 1 L of breath is 25×10¹⁰ ppb
How do I determin the concentration in ppb?The concentration of substance in parts per million, ppb can be obtained by using the filling formula:
Concentration (in ppb) = (amount of solute / volume) × 10⁹
With the above formula, we can obtain the alcohol concentration in parts per billion, ppb as shown below:
The concentration of the vitamin C in ppb can be obtained as follow:
Amount of alcohol = 250Volume = 1 LConcentration (in ppb) =?Concentration (in ppb) = (amount of solute / volume) × 10⁹
Concentration (in ppb) = (250 / 1) × 10⁹
Concentration (in ppb) = 25×10¹⁰ ppb
Thus, the concentration in ppm is 25×10¹⁰ ppb
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sodium atoms contain 11 protons and 11 electrons with a mass of approximately 23. the atomic number of sodium is therefore:
what is minimal concentration of chloride ion (in m) to form pbcl2 precipitate when solid nacl is added to 0.0049 m lead(ii) nitrate solution? ksp(pbcl2)
The minimal concentration of chloride ion is 1.67 × 10 ⁻³ M
Concentration is the abundance of a constituent divided by way of the overall volume of an aggregate. several sorts of mathematical descriptions may be outstanding: mass concentration, molar concentration, variety concentration, and extent awareness.
The concentration of a substance is the quantity of solute found in a given amount of solution. Concentrations are normally expressed in terms of molarity, defined because of the variety of moles of solute in 1 L of answer.
The Concentration of an answer is a measure of the quantity of solute that has been dissolved in a given amount of solvent or answer. A concentrated answer is one that has a rather huge quantity of dissolved solute.
calculation:-
2NaCl + Pb ⁺² ------------> PbCl₂
Ksp = [Pb⁺][Cl⁻]²
[Cl⁻] = [tex]\sqrt{ \frac{Ksp}{[Pb+]}[/tex]
= [tex]\sqrt{ \frac{1.4×10^{-8} }{0.0049}[/tex]
= 1.67 × 10 ⁻³ M
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when butane, c4h10, undergoes combustion, it reacts with o2 to form co2 and h2o. how many moles of o2 are required to react completely with 10.6 moles of butane?
189.8 mol of O₂ are required to react completely with 10.6 moles of butane.
What are combustion reaction?An accident occurred when the Hindenburg, an airship filled with hydrogen, tried to land in New Jersey in 1937. 36 persons were killed when the airship was destroyed and the hydrogen instantly exploded in a massive explosion. The chemical process was straightforward: water was created when hydrogen and oxygen combined.
A hydrocarbon, a substance comprised only of carbon and hydrogen, is involved in numerous combustion reactions. Carbon dioxide and water are the byproducts of the burning of hydrocarbons. Since their combustion produces more amounts of heat energy, many hydrocarbons are use fuel. Gas grills frequently use propane (C3H8) as their fuel source. Propane is a gaseous hydrocarbon.
Reaction is:
C₄H₁₀ + [tex]\frac{13O_{2} }{2}[/tex] → 4CO₂ + 5H₂O
Given,
no. moles of butane = 29.2 mol
from the balanced chemical equation,
we can say that:
1 mol of C₄H₁₀ requires [tex]\frac{13}{2}[/tex] moles of O₂
29.2 mol of C₄H₁₀ requires [tex]\frac{13}{2}[/tex] × 29.2
⇒189.8 mol of O₂
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what two characteristics of liquid liquid oxygen contradict predictions from the valence bond theory that are explained by the molecular orbital theory
Two characteristics of liquid oxygen contradict predictions from the valence bond theory that are explained by the molecular orbital theory are:
1) Pale blue color
2) Para-magnetism
The valence bond theory is not able to explain the para magnetic behavior of the oxygen that give pale blue color. This is explained by molecular orbital theory.
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the species oxidized shows a(n) the species oxidized shows a(n) drop zone empty. the species reduced shows a(n) the species reduced shows a(n) drop zone empty. the species that shows a decrease in oxidation number is the the species that shows a decrease in oxidation number is the drop zone empty. the species that shows an increase in oxidation number is the the species that shows an increase in oxidation number is the drop zone empty. reducing agent. decrease in oxidation number. oxidizing agent.
1) The species oxidized shows a(n) = increase in oxidation number.
2) The species reduced shows a(n) = decrease in oxidation number.
3) The species that shows a decrease in oxidation number is the = oxidizing agent.
4) The species that shows an increase in oxidation number is the = reducing agent.
What do you mean by oxidation and reduction?The degree of biological activity controls both the formation of zones where specific redox processes predominate and the progression of environmental redox reactions. Anoxia, which are situations when the concentration of dissolved molecular oxygen is extremely low, is a requirement but not a sufficient condition for lowering conditions. The active microbial population shifts from communities that depend on aerobic respiration, in which molecular oxygen serves as the terminal electron acceptor, to anaerobic respiration, in which other chemical substances take the place of molecular oxygen as the terminal electron acceptor supporting respiration, as a result of the development of anoxia.
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For many purposes we can treat propane C3H8 as an ideal gas at temperatures above its boiling point of −42.°C Suppose the temperature of a sample of propane gas is raised from -28.0°C to 9.0°C, and at the same time the pressure is increased by 5.0%
The percent change in volume is 21 %.
given that :
temperature , T1 = 273 -28 = 245 K
temperature , T2 = 273 + 9 = 282 K
pressure P1 = P
pressure P2 = P - O.O5 P = 0.95 P
Volume V1 = V
volume V2 = ?
using ideal gas equation , we get :
P1 V1 / T1 = P2 V2 / T2
V2 = (P1 V1 T2 ) / P2 T1
V2 = ( P × V × 282 ) / ( 0.95 P × 245 P )
V2 = 1.211 V
change in volume is given as = V2 - V1
= 1.211 V - V
= 0.211 V
Percent change in volume is = (0.21 V)) / V ) × 100 %
= 21 %
Thus, For many purposes we can treat propane C3H8 as an ideal gas at temperatures above its boiling point of −42.°C Suppose the temperature of a sample of propane gas is raised from -28.0°C to 9.0°C, and at the same time the pressure is increased by 5.0% . the percent change in volume in 21 %.
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Match each label below with the appropriate term. Note: there may be more than one correct answer.
A Lewis diagram: two atoms of upper C l connected by a single bond. Both atoms have two electrons above, below, and to the outside of the pair. Arrow a points to the bond; arrow b to the electron dots below the left atom. A second diagram shows upper O single bonded to upper H to the left and below, with two electron dots above and to the right. Arrows c point to each of the bonds.
a
nonbonding electrons
sigma bond
represents two electrons
b
nonbonding electrons
sigma bond
represents core electrons
c
nonbonding electrons
bonding electrons
sigma bond
The Matchup of each label with the appropriate term is given below:
A: Sigma bond & Represents two electrons
B: Nonbonding electrons
C: Bonding electrons & Sigma bond
What is Sigma bond?Sigma bonds, often known as bonds, are the strongest kind of covalent chemical bonding in chemistry. They are created by atomic orbitals directly overlapping one another. Using symmetry group terminology and techniques, sigma bonding for diatomic molecules is most easily defined.
Note that an electron that is not a part of chemical bonding is known as a non-bonding electron. The electron may be restricted to one atom in a lone pair. has the electron distributed throughout the molecule in a non-bonding orbital.
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Answer:B,C
Explanation:
how many grams of h2so4 must be dissolved in 1.08 l of solution to generate a solution with a concentration of 2.69 m
The mass of H₂SO₄ that must dissolved in 1.08 liters of solution to make 2.69M solution is 271.52 grams.
The molarity of the substance is defined as the number of moles of solute per unit volume of solution in liters.
In this case,
The volume of the solution is 1.08 L.
The required molarity of the substance is 2.69M.
So,
we can write,
Molarity = Moles/Volume
Moles = Molariyt x volume
Moles =2.69 x 1.03
Moles = 2.77
Moles = Mass required/molar mass.
Molar mass of H₂SO₄ is 98 g/mol.
Putting values,
2.77=Mass required/98
Mass required = 271.52 grams.
So, 271.52 grams of H₂SO₄ is required to make 2.69M solution.
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The earth’s magnetic poles are in the general direction of the planet’s geographic poles. However, unlike the geographic poles, the magnetic poles are not always in the same place.
As used in the text, what does the phrase "general direction" mean?
(A) different but the same exact way
(B) similar but complete opposite way
(C) similar but not the same exact way
(D) different and complete opposite way
The earth’s magnetic poles are in the general direction of the planet’s geographic poles. the phrase "general direction" mean different and complete opposite way.
What is difference between magnetic pole and geographic pole ?A bar magnet that is suspended freely will always point north-south. This is a result of the bar magnet's south pole being drawn to the Earth's magnetic north pole (geographic south).
Geographic and magnetic poles on Earth are generated by various sources, thus they are not perfectly aligned. The outer core's swirling currents of liquid iron are what generate the Earth's magnetic field.
Thus, Option D is correct.
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Ahmed’s teacher has set up a Geiger-Mueller tube to detect nuclear radiation. She has not yet started to get out the school’s nuclear radiation sources. Ahmed notices there is a low count rate on the detector. State the name for this normal, low-level measurement.
The normal, low-level measurement on the detector when dealing with a Geiger-Mueller tube to detect nuclear radiation is known as background radiation.
What is Radiation?This is referred to as the emission or transmission of energy through space or a material medium. This is usually in the form of waves or particles and it is used for various purposes such as in treatment of diseases.
Radiation can also cause a change in DNA thereby resulting in mutation when exposed to large amounts. Geiger-Mueller tube is used to detect nuclear radiation by scientists for various operations.
In a scenario where there is a low count rate on the detector, it means small amounts were released which is known as the background radiation and it is responsible for the normal, low-level measurement.
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Which statement describes the process of cellular respiration?
Responses
A. It takes place in plant cells and involves chemical reactions with carbon dioxide, water, and energy from the sun to produce sugars.
B. It takes place only in animal cells and involves chemical reactions with oxygen and releases stored energy.
C. It takes place in plant and animal cells and involves the division of cells.
D. It takes place in plant and animal cells and involves chemical reactions with oxygen to release stored energy.
Answer:
D
Explanation:
when the ionic solute k3po4 is dissolved in water, what can you say about the number of potassium ions present in the solution compared with the number of phosphate ions in the solution?
We can say that When K3PO4 is dissolved in water , the number of potassium ions present in the solution is three times the number of phosphate ions in the solution .
What are Ionic compounds ?
Ionic compounds can be defined as ionic bonds or chemical bonds formed by oppositely charged ions held together by electrostatic forces.
These are usually formed between metals and non-metals. Atoms always tend to acquire stable electronic configurations when atoms lose electrons to form cations, and anions are formed when atoms gain electrons. These two oppositely charged atoms together form an ionic bond, which is called an ionic bond.
Ionic compounds, also called ionic compounds, are held together by electrostatic forces. Ionic compounds are also formed when the electronegativity difference between two atoms is large. This causes one atom to attract more electrons than the other, resulting in electron loss and electron gain within the atom.
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what is the sum of all the coefficients in this reaction when properly balanced? lead (ii) nitrate hydrogen sulfide yields lead (ii) sulfide nitric acid (hno3)
The sum of the coefficients involved in the equilibrium reaction equation is 5.
the equilibrium reaction equation is A chemical reaction is said to be balanced when the number of atoms of an element on the reactant side is equal to the number of atoms on the product side. You can check this by doing an atomic count.
When trying to solve this problem, the first step that must be taken is to obtain a balanced reaction equation. Because that's the key to what we're trying to get here. Now you can see the balanced reaction equation for the reaction and then get the total.
[tex]Pb(NO3)_2 + H_2S = > 2 HNO_3 + PbS[/tex]
The sum of the coefficients of the equilibrium reaction equation is 1+1+2+1=5.
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Marie mixed 5 g of carbon with 5 g of lead oxide.
She heated the mixture strongly for 15 minutes in a fume cupboard.
After 15 minutes, Marie found some shiny beads in the mixture.
a.
i) Marie collected all the shiny beads from this experiment.
How could she test them to show they were metal?
_________________________________________________________
_________________________________________________________
ii) Marie’s test showed that the tiny beads were metal.
What metal were the beads likely to be?
________________________________________________________
b. Marie also expected carbon dioxide to be formed in this experiment.
i) In carbon dioxide, what element is combined with carbon?
__________________
ii) Where, apart from the air, did this element come from in this experiment?
__________________
c. Give one safety precaution Marie should take during this experiment.
1. Marie could test if the beads she collected were metals by seeing if they conducted electricity or by adding it to a dilute acid to see if hydrogen gas is evolved.
2. Since the reaction involved a metallic oxide, lead oxide, the metal would most probably be Lead.
3. The element that is combined with carbon in carbon dioxide is oxygen.
4. The element oxygen in this experiment comes from lead oxide.
5. Marie should wear goggles as a piece of safety equipment in this experiment.
What are some properties of metals?Metals are shiny hard substances that form positive ions by the loss o electrons.
Some properties of metals include;
high densityability to conduct heat and electricitymalleable and ductileproduces sound when struckLead is an example of metal whereas lead oxide is a compound of lead and oxygen.
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you are given two samples of elements, and each sample has a mass of 10 grams. if the number of atoms in each of these samples is the same, what must be true of the two elements?
The must be true of the two elements is All of the above.
An element is a substance composed of only one type of atom that cannot be broken down into simpler substances by either physical or chemical processes. They are divided into metals, non-metals, and semi-metals. Helium is the element with atomic number 2 in the periodic table. Each helium atom has two protons in its nucleus.
The atomic weight of the element is 4.0026. Helium is known as a gas in its pure form because it does not combine easily. A compound is a unique substance formed by the chemical combination of two or more elements. Compounds are formed through chemical reactions. Elements of a compound are held together by chemical bonds.
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Write the formulas of the following binary molecular compounds:
9) nitrogen monoxide
10) diphosphorous pentaoxide
11) chlorine dioxide
12) dinitrogen tetroxide
Having freckles (f) is dominant over not having freckles (f). a parent with freckles is crossed with a parent without freckles. the punnett square shows the possible genotypes of the offspring. what is the probability that an offspring will have a homozygous dominant genotype? 50% % what is the probability that an offspring will have a heterozygous genotype? 25% % what is the probability that an offspring will have a homozygous recessive genotype? 25% %
The homozygous dominant genotype is 0%, the heterozygous genotype is 50%, and the homozygous recessive genotype is 50%.
This problem does not display the Punnett box. If the genotype of the heterozygous parent has spots (Ff) and the other parent is homozygous without spots, the cross between the two parents is:
Parental: Ff >< ff
Gametes: F . f >< f
Filial: Ff (heterozygous having freckles) and ff (recessive homozygous over not having freckles)
The probability that the offspring will have a homozygous dominant genotype is 0%.The probability that the offspring will have a heterozygous genotype is 50%.The probability offspring will have a homozygous recessive genotype is 50%Learn more about a parent with freckles here https://brainly.com/question/12885435
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Answer: 0%, 50%, 50%
Explanation:
1. What is the atom name(s) of Hydrogen Gas, Salt (Sodium Chloride), Methane, Carbon Dioxide, Oxygen Gas, Air, Water, Hydrochloride Acid, Sodium Hydroxide (lye), Carbonated Water?
Atom in
a- hydrogen gas - H atom
b - Salt = Sodium atom and chlorine atom
c - Methane - carbon , hydrogen atom
d - carbon dioxide = carbon , oxygen atoms
e - oxygen gas = oxygen atom
f - water = hydrogen and oxygen tom
g - hydrochloric acid = hydrogen and chlorine atoms
h - sodium hydroxide = sodium , oxygen and hydrogen atom
I - carbonated water - carbon , oxygen , hydrogen atoms
What is an atom ?
An atom is a particle of matter that uniquely defines a chemical element. Atoms consist of a central nucleus surrounded by one or more negatively charged electrons. Atoms, the smallest units that can decompose matter without emitting charged particles. It is also the smallest unit of matter with the characteristic properties of chemical elements. As such, atoms are the basic building blocks of chemistry.
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what is the energy (in joules) of the photon emitted when the electron of a he cation relaxes from the 3s orbital to the 2s orbital? enter the numerical answer only; do not enter a unit.
the energy emitted by photon was 0.300564×10-18 J
what is photon?
The term photon, which means "light" in Ancient Greek, refers to a basic particle that is a quantum of the electromagnetic field, which includes electromagnetic radiation like light and radio waves. It also serves as the force carrier for the electromagnetic force. Considering that photons have no mass, they always travel at the speed of light in a vacuum, which is 299792458 m/s (or 186,282 mi/s).
formula was
ΔE=R(1n2f−1n2i)
R=the Rydberg constant, 2.178×10-18 J
For a transition from n=3 to n=2, we get
ΔE=2.178×10-18 J(1/22−1/32)
=2.178×10-18 J(1/4−1/9)
=2.178×10-18 J× 9 – 4/9×4
=2.178×10-18 J× 5/36
=0.300564×10-18 J
hence the energy emitted by the photon was 0.00564x10-18J
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he solubility of aspirin in ethanol is approximately 40g/100ml at room temperature. if you had a 100% yield how many milliliters of ethanol would you need to dissolve your product for the recrystallization step?
For the recrystallisation step, we need 71.4ml of ethanol for the solubility of aspirin which has 100% yield.
What is solubility?
Solubility is the ability of a solute to dissolve in solvent to make a solution at a given temperature. This is because of the intermolecular forces balance between solute and solvent and change in entropy.
In 100 ml of the solution, the solubility of aspirin is 40 g. The mass of aspirin is not indicated in the problem, so it can be assumed that the mass of aspirin needed is 40 g. With this, the volume of the solution can be calculated.
Volume of the solution = 40g x 100ml/40g = 100ml
Density of aspirin = 1.4g/ml
Volume of aspirin = 40g x 1ml/1.4g = 28.57ml
Volume of ethanol = 100ml - 28.57ml = 71.4 ml
Therefore, the solubility of 40g of aspirin when yield is 100% requires 71.4ml of ethanol.
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increased co2 in the atmosphere since the industrial revolution has resulted in lower surface ocean ph of about ph units.
Since the start of the industrial revolution more than 200 years ago, human activity has led to an increase in the atmospheric concentration of carbon dioxide (CO2). The pH of the ocean's surface waters has decreased by 0.1 pH units throughout this time.
As a result of the rise in atmospheric CO2 concentrations, the pH of the ocean surface has decreased over the industrial age, falling from 8.2 to below 8.1. This drop is accompanied by a 30% increase in oceanic acidity.It first creates carbonic acid. The carbonic acid then "dissociates," or separates, into bicarbonate ions and hydrogen ions. Ocean acidification is caused by an increase in hydrogen ion concentration and a decrease in carbonate ions as a result of increasing CO2 absorption.What is the meaning of Industrial Revolution ?A significant and swift transition in an economy (as in late-18th-century England) signaled by the widespread adoption of power-driven machinery or by a significant shift in the prevalent forms and applications of such machinery.
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what type of mining involves boring a hole underground to the target substance, dissolving it into a liquid, then sucking it out. sodium chloride (salt) can be mined this way.
In block caving mining, the desired material is located underground, dissolved into a liquid, and then extracted. This is one method of mining sodium chloride, or salt.
Drilling holes beneath the ore body and utilizing designed blasts to disintegrate the ore and rocks are all part of block caving mining. Then, with the aid of gravity, the mixture of rocks and ore is carried for processing. Once the production from open-pit mining becomes unprofitable, block caving mining frequently occurs. Is called block caving mining
Salt Chloride (sodium chloride), The ratio of the sodium and chloride ions in sodium chloride is exactly one to one. It is frequently referred to as table salt, common salt, or halite (the mineral form of common salt).
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