Answer:
pH of HCl solution is 1.52, which suggests that dilute HCl solution is very acidic in nature.
Is CH3 nonpolar covalent?.
Methane creates a covalent bond that is non-polar. This is due to the fact that there is almost any distinction between the electronegativity of carbon and hydrogen.
Because the electronegativities of the C and H are comparable when we simply consider CH₃, we declare it to be non-polar. As a result, they cancel one another, making CH₃ non-polar.
A methyl anion, the [CH₃-] group, has covalent connections between its carbon and hydrogen atoms. Although a C-H bond has no bond polarity, the anion has molecular polarity because of the negative charge attached to carbon.
Methane creates a covalent bond that is non-polar.
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Which of the following pH values indicates a solution with the highest concentration of hydrogen ions? A. pH = 1, B. pH = 2, C. pH = 7, D. pH = 14.
A solution with a higher number of free hydrogen ions would have lesser pH than a solution having comparatively lower number of free hydrogen ions. Thus, the answer would be Option A i.e. pH = 1.
On the pH ( denoting potential or power of hydrogen) scale , the number which has the highest concentration of hydrogen ions must generally be 0. This represents or marks a chemical/solution with a hydrogen ion concentration of 1 mole/liter or a solution of 1 M (Molarity). Such high concentrations/numbers of hydrogen ions are typically only found in solutions/mixtures made with a strong acid when completely dissociates in water (hydrochloric acid is an example of such solution). We generally treat the pH scale from zero(0) to fourteen (14). For each pH unit, the concentration of hydrogen ions or the number of free hydrogen ions decreases by an order of 10. However, for a solution of pH of less than 0 to exist, a higher hydrogen ion concentration than 1 M concentration would be required.
The lowest known pH is -3.6 from which is achieved by extremely acidic mine water.
Thus, acids generally have high concentrations of hydrogen atoms.
Hence, the answer to the question would be an option with lowest pH score, which is option A.
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Is the ending substance the same substance as the blue powder? what happened to the atoms of the starting substances when the ending substances formed? be sure to explain your answers to both of these questions.
The ending product resembles the blue powder just a little bit.
What is a simple definition of a chemical reaction?
In a chemical reaction, one or more substances—also known as reactants—are changed into one or more additional substances—also known as products. Chemical elements or chemical compounds make up substances.
The result of a chemical reaction is a different substance, and the qualities of the new material are determined by how the atoms are rearranged throughout the process. When the new material is generated as a result of the reaction, the atoms of the initial substance degrade at the end. Because the elements involved in the reaction were divided, both reactants reduced amounts of the initial materials to create the new compound.
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Grams to moles. How many moles of KNO3 are in
235.06 grams of KNO3?
Answer:
3.17648
Explanation:
K = 19
N = 7
O3 = 48
19 + 7 + 48 = 74
74 = Mr of KNO3
moles = mass / Mr
moles = 235.06 / 74
moles = 3.17648
Describe the structure of the berilium atom
Answer:
Beryllium as 4 protons and 5 neutrons in its nucleus giving it an Atomic Number of 4 and an atomic mass of 9. An atom of Beryllium has only 2 electrons in its outer shell.
A student researches how two types of rocks are formed and records the information below.
Rock Formation
Rock 1: Formed by cooling magma
Rock 2: Formed by compacting and cementing particles together
The student claims that Rock 2 is more likely to contain a fossil than is Rock 1
Which statement BEST describes the students claim?
There wasn’t a science option :(
Answer: Based on Rock Formation, the student's judgment that Rock 2 is more likely to contain a fossil than Rock 1 is appropriate.
Explanation:
Rocks are classified into three types:
Igneous rocks, metamorphic rocks, and sedimentary rocks.
Rock 1 is an Igneous Rock.
When a fiery, molten rock crystallizes and hardens, it forms igneous rocks (from the Latin root word fire).
Rock 2 is a Sedimentary Rock
At standard surface temperatures, sedimentary rock is developed at or near the Earth's surface by the build-up and lithification of sediment (detrital rock) or by precipitation from suspension (chemical rock).
Under low temperatures and pressure, rock deposits produce sedimentary rocks in the ocean and on the Earth's crust. Plants and animals die and are deposited in a sedimentary deposit.
The following are the reasons why sedimentary rocks are the only rock types that hold fossils:
The burial of deceased plants and animals by additional sediment results in the build-up of minerals from water in bones, which leads to the development of fossils.
As a result, sedimentary rocks are the only rock types that retain fossils.
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How many atoms are in 2 H2O molecules?.
There are a total of 6 atoms in 2 H2O molecules. Each H2O molecule is made up of 2 hydrogen atoms and 1 oxygen atom, which means that 2 H2O molecules contain a total of 4 hydrogen atoms and 2 oxygen atoms. This can be calculated by multiplying the number of atoms in each molecule (2 hydrogen atoms and 1 oxygen atom) by the number of molecules (2). Therefore, 2 H2O molecules contain 2 x 2 = 4 hydrogen atoms and 2 x 1 = 2 oxygen atoms, for a total of 4 + 2 = 6 atoms.
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How many molecules are in 1. 5 moles?.
There are 9.033 x10²³ molecules in 1. 5 mol
By multiplying the sum of moles by the Avogadro constant, one can get the total number of atoms or molecules in a sample. The equation reads as follows:
number of molecule= moles x avogadro's number
One mole of material has 6.022x10² atoms, and equal quantities of different gases measured at the same pressure and temperature have the same number of molecules in them.
number of molecule= moles x avogadro's number
number of molecule= 1. 5 mol x 6.022x10²³
number of molecule= 9.033 x10²³
Therefore, there are 9.033 x10²³ molecules in 1. 5 mol of H₂O
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using standard heats of formation, calculate the standard enthalpy change for the following reaction.
We must determine standard enthalpy change using standard heat of formation. We are aware of the standard heat of graphite creation in order to answer that query.
One group of chemical elements can convert chemically into another through the process of reaction. Sol- We must follow their request and use the accepted temps of formation in this problem. In order to calculate a standard enthalpy change, we must use a standard heat of formation. As a result, in this scenario, we must establish the typical enthalpy change for the particular reaction. What is the advised reply to it, then? In this situation, we must determine the standard or enthalpy change. The result of mixing oxygen gas and solid graphite is c. As a result, gas is created. This is the answer to that reply. The usual heat of creation must be determined. This holds true.
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How many molecules are in 2. 0 molecules?.
Two O molecules would refer to two individual molecules of O, which stands for oxygen. Oxygen is a diatomic molecule, which means that each molecule of oxygen is made up of two atoms of oxygen (O2). So, the number of molecules in two O molecules would be two.
Two O molecules refers to two individual molecules of oxygen, which is a diatomic molecule made up of two atoms of oxygen (O2). It's a number that represents the number of molecules.
Each molecule has two atoms of oxygen. So, the number of molecules in two O molecules would be two. The statement is talking about a quantity of molecules, not a physical object or a specific set of molecules. In other words, the number 2.0 or two in this context is a representation of the quantity of oxygen molecules, not a physical object with a specific number of molecules.
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in complementary base pairing bonds with and bonds with
The two strands of DNA are held together by hydrogen bonds.
What is chemical bond?A chemical bond is an attraction between two atoms or ions that allows the formation of chemical substances. Chemical bonds are formed when the atoms share or transfer electrons in order to obtain a full outer shell of electrons, achieving a more stable electron configuration. This can happen through covalent bonds, ionic bonds, hydrogen bonds, and other types of bonds. Chemical bonds are responsible for the stability of molecules and are responsible for many of the physical and chemical properties of substances.
These hydrogen bonds form between the nitrogenous bases of the two strands of DNA. Adenine (A) on one strand always bonds with thymine (T) on the other, and cytosine (C) always bonds with guanine (G). This highly specific arrangement of base pairs is essential for the replication and transcription of genetic information.
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Find the empirical formula for a compound with a molecular formula of C8H12.
Answer:
C2H3
Explanation:
The empirical formula is the simplest whole number ratio of atoms of each element in a compound while the molecular formula shows us the actual number of atoms of each element
Writing C8H12 in a ratio:
8 : 12
This can be simplified by dividing by a common factor present in both numbers
8 and 12 can be divided by 4
8 ÷ 4 = 2 and 12 ÷ 4 = 3, hence the ratio is:
2 : 3
This cannot be simplified any further
Thus, the empirical formula is C2H3
Predict the polarity of 6 real molecules (O2, HF, H2O, NH3, CF4, CH3F). First, draw the
molecules and any bond dipoles. Then draw any molecular dipoles. Explain your
reasoning before you check your predictions with the simulation.
Carbon dioxide,Ammonia,Oxygen,Water,Hydrogen fluoride,Nitrogen are the polarity of 6 real molecules
What are the molecular polarity?Polar molecules are those that possess regions of positive and negative charge. Water is an example of a polar material. The type of bonds it has, when coupled with its shape, gives one end of the molecule a slight positive charge (the hydrogen end) and the other a slight negative charge (the oxygen end).Like bonds, molecules can also be polar. In a polar molecule, electron density is unevenly distributed throughout the molecule, resulting in regions of partial negative charge and regions of partial positive charge.Whether a molecule is polar or nonpolar is a matter of its geometry. If one end of the molecule has a positive charge while the other end has a negative charge, the molecule is polar. If a charge is evenly distributed around a central atom, the molecule is nonpolar.To learn more about molecular polarity refers to:
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Write a bond-line formula for each of the following compounds:
(a) 1,4-Dichloropentane
(b) sec-Butyl bromide
(c) 4-Isopropylheptane (k) 1,4-Dicyclopropylhexane
(d) 2,2,3- Trimethylpentane (I) Neopentyl alcohol
(e) 3-Ethyl-2 methylhexane
(f) Dichlorocyclopentane
(g) cis-1,2 Dimethylcyclopropane
(h) trans-1,2 Dimethylcyclopropane
(i) 4-Methyl-2-pentanol G) trans-4 Isobutyleyclohexanol (m) Bicyclo[2. 2. 2Joctane (n) Bicycl0butane (o) Cyclopentylcyclopentane (p) 7-Methyl bicyclo[2. 2. 1]heptane
Bond line shows a molecular formula with a single line for each of the covalent links.
Define Bond line
Organic chemists have a convention for displaying molecular structures called bond line notation. This represents a bond between two atoms as a line. The ends of the line represent the positions of the bonded atoms. Only atoms other than carbon and hydrogen are particularly shown.
Pentane is the alkane's parent name for 1,4-dichloropentane. The prefix di- indicates that there are two substituents, and the numbers 1 and 4 indicate that they are on the corresponding carbons. Butane serves as the parent chain for sec-butyl bromide. Heptane serves as the parent chain for 4-isopropylheptane. Pentane serves as the parent chain for 2,2,3-trimethylpentane. Hexane serves as the parent chain for 3-Ethyl-2-methylhexane. Cyclopentane serves as the parent chain for dichlorocyclopentane.
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What is a 2. 0 molar solution?.
The molar solution 2.0 obtained when 0.5 mole solute is dissolved in:
250 ml solution (Option C)
Moles of solute in moles divided by volume of solution in liters is molarity.
M = n/V
Where:
M denotes molarity
n denotes moles of solute, and
V denotes volume.
You can solve for the number of moles by multiplying the equation by volume, or MV = n.
So, to find the number of moles of solute, multiply the molarity by the volume. The molar mass of the solute can then be used to convert moles of solute into grams of solute, or mass.
Molarity = moles of solute / volume of solution
2 = 0.5 / volume of solution
So, the volume of solution = 0.25 L
= 250 ml
The question is incomplete, it should be:
2.0 molar solution is obtained when 0.5 mole solute is dissolved in:
A. 250 ml solvent
B. 250 gr solvent
C. 250 ml solution
D. 1000 ml solvent
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How many moles of water molecules are in 0.100 mol of copper(II) sulphate pentahydrate?
Answer:
0.500 moles of water molecules
Explanation:
The chemical formula of copper(II) sulphate pentahydrate is CuSO4·5H2O, which means that it contains 5 moles of water molecules for every 1 mole of copper(II) sulphate. To find the number of moles of water molecules in 0.100 mol of copper(II) sulphate pentahydrate, we can multiply the number of moles of copper(II) sulphate by the coefficient of water molecules:
0.100 mol x 5 moles of water/1 mole of copper(II) sulphate = 0.500 moles of water.
so there are 0.500 moles of water molecules in 0.100 mol of copper(II) sulphate pentahydrate.
Which of the following best explains the relationship between structures X and Y?
The relationship between structures X and Y is X, nuclei, are located inside Y, chromosomes, and these structures provide energy for the cell.
What are chromosomes?A chromosome is a lengthy DNA molecule that contains all or a portion of the genetic code for an organism. The histones, which are the most significant of these proteins in eukaryotic cells, coat the very long, thin DNA fibers in most chromosomes. KROH-muh-some) A structure that can be discovered in a cell's nucleus. DNA and proteins arranged into genes make up a chromosome. 23 pairs of chromosomes are typically present in each cell.The Latin term for a fruit's seed is nucleus (plural: nuclei). The exceedingly dense center part of an atom, or the atomic nucleus, is what it most frequently refers to. The majority of the DNA in a eukaryotic cell is found in the cell nucleus, which is the cell's main organelle.The complete question is,
Which of the following best explains the relationship between structures X and Y?
X, chromosomes, are located inside Y, the nucleus, and these structures store genetic material for the cell.
X, ribosomes, are located inside Y, the nucleus, and these structures provide protection for the cell.
X, nuclei, are located inside Y, chromosomes, and these structures provide energy for the cell.
X, chromosomes, are located inside Y, DNA, and these structures store proteins for the cell.
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name all monatomic and polyatomic ions
What kind of reaction occur in an electrolytic cell? what characterize it voltage?
An electrolytic cell is a type of electrochemical cell that uses an externally applied voltage to drive a chemical reaction.
In an electrolytic cell, the applied voltage causes a reaction to occur, such as the oxidation or reduction of ions in the electrolyte or the decomposition of the material.
The voltage applied across the cell is known as the electrolytic voltage and is typically much higher than the cell's thermodynamic equilibrium voltage.
The electrolytic voltage is used to drive the reaction, and is typically provided by a battery, fuel cell, or other external power source.
The reaction that occurs during an electrolytic cell is characterized by its voltage, current, and power output.
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consider the steps involved in preparing a dilute solution from a stock solution. arrange them in order from first to last.dd deionized water until the volume reaches the mark on the flask.Add the desired amount of stock solution. Obtain a flask that is thoroughly cleaned and dried.Cap the flask and invert several times to thoroughly mix the solution
Obtain a flask that is thoroughly cleaned and dried. Cap the flask and invert several times to thoroughly mix the solution are listed below.
What is volume ?
Volume, a three-dimensional quantity, is used to calculate the capacity of a solid shape. In order to calculate how much space a closed figure can occupy in three dimensions, volume is utilized. An example would be the space or shape that a substance, such as a solid, liquid, gas, or plasma, occupies. In addition, the cubic meter deriving from the S.I. is widely employed to quantify volume.
What is deionized water ?
Demineralized water, also known as DI water or DM water, is occasionally used interchangeably with DEI water. Most of the ions are no longer present in the water. Ions are atoms or molecules that are either positive ions (which are called cations) or negative ions (which are called anions) depending on the ratio of electrons to protons (called a cation).
Steps in preparation of dilute solution from a stock solution
1 Obtain a flask that is thoroughly cleaned and dried
2 Add the desired amount of stock solution
3 Add deionized water until the volume reaches the mark on the flask
4 Cap the flask and invert serval times to thoroughly mix the solution
If a student accidentally adds deionized water past the calibration mark on a volumetric flask she should start over and make an entirely new solution. Because it is calibrated for the particular volume if excess deionized water is added it gives wrong values(errors) in titration.
Therefore, Obtain a flask that is thoroughly cleaned and dried. Cap the flask and invert several times to thoroughly mix the solution are listed above.
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What is soil conservation and water conservation?
Soil and water conservation are those activities at the local level which maintain or enhance the productive capacity of the land including soil, water and vegetation in areas prone to degradation. prevention or reduction of soil erosion, compaction, salinity; conservation or drainage of water and.
What do you mean by conservation of water?
Water conservation includes all policies, strategies and activities for the sustainable management of natural freshwater resources, for the protection of the hydrosphere and for meeting current and future human demand. The amount of water used affects population, household size, growth and well-being.To know more about conservation of water, click the link given below:
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What is the density of a glass fragment that has a mass of 1.5g and a volume of 0.75mL?
2gcm³ is the density of a glass fragment that has a mass of 1.5g and a volume of 0.75mL.
What is density ?The term density is define as the ratio of mass and volume. The formula for density is d = M/V, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimeter.
Density = mass / volume
Given:
Density = ?
Mass = 1.5 gram
Volume = 0.75 ml
By substituting this values in give equation we get,
Density = 1.5 / 0.75
= 2 gcm³
Thus, 2 gcm³ is the density of a glass fragment that has a mass of 1.5g and a volume of 0.75mL.
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The smallest subatomic particle that makes up an atom, and carries a negative charge is called
An electron is the name for the smallest subatomic particle that constitutes an atom and has a negative charge.
Where can one find electrons and what do they do?
Electrons are tiny subatomic particles with a negative electric charge. They control chemical reactions and bonds and are located outside of the atomic nucleus.An electron is a subatomic particle with a negative electric charge.It is in charge of chemical reactions and bonding and can be found outside the atomic nucleus.The building blocks of electricity, known as electrons, are present in every atom. The movement of electrons through a substance is what generates electrical current.Because electrons have a relatively low mass compared to other subatomic particles, wave-particle duality in quantum mechanics applies to them.To learn more about electron refer to:
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A donut has a density of 0.75 g/cm cubed and a mass of 100.0g. What is the volume of the donut?
Answer:
133.333333333 cm^3
Explanation:
Volume = Mass/Density
Predict the product(s) for the following reactions: (a) NaBH4
(b) CH3CH2OH
(CH3)2CHCH2CH2CH
NaBH4
CH3 COCH2CH3
CH3CH2OH
(c) CO₂CH3
1. LiAlH4, ether
(d) 2. H₂O
CO2CH3
NaBH4
CH3OH
A noteworthy skill of human chemists is the capacity to predict reactions' outcomes with considerable accuracy.
Can we predict chemical reactions?A noteworthy skill of human chemists is the capacity to predict reactions' outcomes with considerable accuracy.These predictions are, of course, grounded on a fundamental physical understanding, but they are unquestionably not the result of meticulous numerical analysis.See what transpires when the chemical splits into smaller, more recognizable products like water, carbon dioxide, or any of the gaseous elements to forecast the outcomes of such a reaction.Combining pure elements frequently results in synthesis reactions.many types of chemical reactions.synthetic processes decaying processes. answers that only replace one.replacement reactions are doubled.To learn more about chemical reactions refer
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Explain why your lung capacity and breathing rate are larger when you are exercising than when you are asleep
When exercising, the body requires more oxygen to fuel the muscles and produce energy. To meet this increased demand for oxygen, the lungs increase their capacity and breathing rate. This allows for more oxygen to be taken in with each breath and for the oxygen to be delivered to the muscles more quickly.
During exercise, the body's metabolism increases as the muscles need more energy to perform the exercises. As a result, the heart rate increases and the blood vessels dilate, allowing for more blood to flow through the body and deliver oxygen to the muscles. The lungs also respond to the increased demand for oxygen by increasing their capacity and breathing rate to take in more oxygen with each breath.
Additionally, the diaphragm and intercostal muscles that control the lungs' expansion and contraction also play an important role in this process. During exercise, these muscles work harder, allowing the lungs to expand more and take in more oxygen with each breath.
On the other hand, when you're asleep, the body's metabolism slows down and the muscles are at rest. So, the body doesn't need as much oxygen as it does during exercise. As a result, the lungs' capacity and breathing rate decrease, allowing for less oxygen to be taken in with each breath and for the oxygen to be delivered to the body more slowly.
In summary, when exercising the body requires more oxygen to fuel the muscles and produce energy, and the lungs increase their capacity and breathing rate to meet this increased demand for oxygen, allowing for more oxygen to be taken in with each breath and for the oxygen to be delivered to the muscles more quickly.
Usually people breathe more gradually while they are sleep, and as sleep stages progress, inhaling becomes more constant and less unpredictable. Nonetheless, studies have shown that when we are in the rapid eye movement (REM) sleep hormone, we also breathe more rapidly and unevenly.
Your lungs and cardiovascular system work quite hard while you exercise. They work together to bring oxygen into the system and get it to the working muscles. This helps your lungs work better by subsequently increases and fortifying the tissue surrounding them.
If you walk at a speed of 3 meters per second (m/s), how far will you walk in 11 seconds?
If you answer please show how you did it too because my teacher is very specific on showing our work!!
If one walks at a speed of 3 meters per second, the distance that will be walked in 11 seconds is 33 metres.
How to calculate distance?Speed is the rate of motion or action, specifically the magnitude of the velocity i.e. it is the rate distance is traversed in a given time.
The speed can be measured by dividing the distance moved by the time taken as follows:
Speed = distance/time
3m/s = d/11
distance = 33metres
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Sulfur dioxide reacts with oxygen to produce sulfur trioxide. Write the equation. Identify the limiting reagent when 20.0 g of SO2 react with 15.6 g of O2.
The equation related to reaction between Sulfur dioxide and oxygen to produce sulfur trioxide is 2SO[tex]_2[/tex](g) + O[tex]_2[/tex](g) [tex]\rightarrow[/tex] 2SO[tex]_3[/tex] (g). SO[tex]_2[/tex] is limiting reagent.
What is limiting reagent?The reactant that controls how much of the products are generated inside a chemical reaction is known as the limiting reagent. Since some of the other reactants remain that after limiting reagent has been used fully, it is occasionally discovered that they are in excess in the reactions. The theoretical yield is the most product that can theoretically be produced.
2SO[tex]_2[/tex](g) + O[tex]_2[/tex](g) [tex]\rightarrow[/tex] 2SO[tex]_3[/tex] (g)
moles of SO[tex]_2[/tex] =20.0 g / 64.07
=0.312moles
moles of O[tex]_2[/tex]= 15.6 g/32
=0.487moles
On dividing the moles by stoichiometry, out of O[tex]_2[/tex] and SO[tex]_2[/tex], SO[tex]_2[/tex] is limiting reagent.
Therefore, the equation related to reaction between Sulfur dioxide and oxygen to produce sulfur trioxide is 2SO[tex]_2[/tex](g) + O[tex]_2[/tex](g) [tex]\rightarrow[/tex] 2SO[tex]_3[/tex] (g). SO[tex]_2[/tex] is limiting reagent.
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A change in a substance that does not involve a change in the identity of the substance called
A physical change is a change in a substance that does not result in a change in the substance's identity.
A physical change is what?
A change in a substance that only affects its physical properties does not alter the substance's identity. Physical changes can involve a substance's state (such as when ice turns into liquid water), its size or shape (such as when it is cut or bent), or its density or texture (like when a solid is crushed or a liquid is whipped).A substance's chemical composition can change without affecting its physical properties.State transitions, such as a solid turning into a liquid or a liquid turning into a gas, may be involved in these modifications.Crushing a solid or whipping a liquid, which are examples of changes in density or texture,To learn more about physical change refer to:
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What are pollutant that caue acid precipitation to enter the air?
Select the following:
1. Drilling for natural ga
2. Burning coal
3. Tranporting petroleum
Burning coal cause acid precipitation to enter the air.
About Acid rainAcid rain is defined as all kinds of rain with a pH below 5.6. Rain is naturally acidic (pH slightly below 6) because carbon dioxide (CO2) in the air which dissolves with rainwater has the form a weak acid . This type of acid in rain is very useful because it helps dissolve the minerals in the soil which are needed by plants and animals.
Acid rain is caused by Sulfur which is an impurity in fossil fuels as well as nitrogen in the air which reacts with oxygen to form sulfur dioxide and nitrogen oxides. These substances diffuse into the atmosphere and react with water to form sulfuric acid and nitric acid which are easily soluble so that they fall with the rainwater. This acidic rainwater will increase the acidity of the soil and surface water which will prove harmful to fish and plant life. Efforts to overcome this are currently being intensively implemented.
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