Because the rate of reaction depends on the reactant concentration, which changes over time, the rate does not stay constant during the whole reaction. Hence, statement (D) is False.
The average rate of reaction is constant throughout a specified amount of time, hence it is impossible for it to provide any insight into the rate of reaction at a certain moment. The immediate pace of response enters the picture at this point. Reactant concentrations often drop with time as reactants are transformed into products, which causes reaction rates to slow down. In general, reaction rates rise as reactant concentrations do.
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if a 250 ml beaker weighs 95.4 g, what is the mass in kilograms?
Mass conversion from grams to kilograms
In physics and chemistry, it is common to express the mass of an object in grams (g) or kilograms (kg). To convert from grams to kilograms, we divide the mass in grams by 1000. This conversion allows us to express larger masses in a more manageable unit.
For example, in this case, the mass of a 250 ml beaker is 95.4 g. To convert this to kilograms, we divide 95.4 by 1000:
95.4 g / 1000 = 0.0954 kg
Therefore, the mass of the 250 ml beaker is 0.0954 kilograms.
It's important to note that the conversion factor between grams and kilograms is constant and equal to 1000. This means that regardless of the mass, the conversion will always result in the same factor of 1000.
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what is the g concentration of a 180 mosm nacl solution
The concentration of a 180 mosm nacl solution in terms of its osmotic pressure is:0.154 g/L.
Concentration (g/L) = Osmotic Pressure (mosm/L) / (Van't Hoff factor * R * T)
Where R is the gas constant (8.31 J/mol K), T is the temperature in Kelvin (273.15 + °C), and Van't Hoff factor is the number of particles that a solute molecule dissociates into in solution (for NaCl, it is 2).
So, the concentration of a 180 mosm NaCl solution can be calculated as follows:
Concentration (g/L) = 180 mosm / (2 * 8.31 J/mol K * (273.15 + 25) K)
Concentration (g/L) = 180 mosm / (2 * 8.31 J/mol K * 298.15 K)
Concentration (g/L) ≈ 0.154 g/L.
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for 2.075 g of khp, how many milliliters of 0.3 m sodium hydroxide is needed to reach the endpoint of the titration
To reach the endpoint of the titration for 2.075 g of KHP, you would need approximately 34.15 mL of 0.3 M sodium hydroxide (NaOH).
This is necessary in order to neutralize the acid in the KHP and reach the endpoint of the titration. When the endpoint is reached, the solution will have a neutral pH. The amount of sodium hydroxide needed to reach the endpoint can be determined by using the molar mass of KHP and the molarity of the sodium hydroxide solution.
The molar mass of KHP is 204.2 g/mol, and the molarity of the sodium hydroxide solution is 0.3 M. Using these values, we can calculate that 34.15 mL of 0.3 M sodium hydroxide is needed to reach the endpoint of the titration for 2.075 g of KHP.
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when should you start a new chemical waste container in the lab? select one: when you accidentally spill chemicals down the side of the current container when you need to dispose of another chemical that is compatible with chemicals in the current container when the contents of the current container are a couple inches below the brim of the container when the contents of the current container completely fill the container to the brim
A new chemical waste container should be started when the contents of the current container completely fill the container to the brim.
Starting a new chemical waste container in the laboratory should be done when the contents of the current container completely fill the container to the brim. This is a standard laboratory practice to ensure the proper segregation and containment of different types of waste. Mixing different chemicals in the same container can be dangerous and create hazardous chemical reactions.
Additionally, overfilling a container can cause it to spill or overflow, which could lead to exposure or contamination. It is also important to properly label each container to ensure the proper disposal and handling of the waste.
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What is the Lewis electron-dot diagram for a fluoride ion?
Lewis electron-dot diagram for a fluoride ion is mentioned below.
What is lewis dot diagram?
Diagrams that show the chemical bonds between the atoms of a molecule are known as Lewis dot structures, also known as electron dot structures. Additionally, they show the total number of lone pairs found in each of the atoms that make up the molecule. Gilbert N. Lewis introduced the Lewis structure in his 1916 article The Atom and the Molecule, and it bears his name.
What is ion ?
Atoms or groups of atoms with an electric charge are referred to as ions. Cations are positive-charged ion particles. Anions are ion types that have a net negative charge. The body contains ions of several common chemicals. Examples that are frequently used are sodium, potassium, calcium, chloride, and bicarbonate.
The fluorine atom forms fluoride, which has 8 valence electrons, and is isoelectronic with a Noble Gas .
:
:F:
:
Therefore, Lewis electron-dot diagram for a fluoride ion is mentioned above.
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12. Which of the following statements about energy is true?
a. Energy cannot change from one form to another
b. Energy can be created and destroyed
C. Energy flows in one direction through the system
Explain why the answer is correct and why the answer when energy changes form all of it is converted into heat is incorrect
The following statements about energy which is true is that it flows in one direction through the system and is therefore denoted as option C.
What is Energy?This is referred to as the ability and strength to do active physical things and the feeling that you are full of physical power and life and the unit is in Joules.
Energy is passed from one trophic level to the next trophic level hence it flows in one direction through successive trophic levels in a food chain through nutrients available. Since there is 100 percent efficiency in energy conversion, some are lost as heat and is therefore the reason why it was chosen as the correct choice.
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convert a pressure of 1.75 atm to kPa and to mmHg
Answer:1.75 atm = 1750 kPa
1.75 atm = 1327.5 mmHg
Explanation:
tophat what main hazard does ethanol, hexanol, and kerosene pose in this experiment?
The main hazard posed by ethanol, hexanol, and kerosene in a "tophat" experiment is flammability.
Ethanol, hexanol, and kerosene are all flammable liquids that can easily ignite and cause fires if tophat they come into contact with a source of ignition such as a flame, spark, or heat source. Additionally, exposure to these liquids can cause skin irritation, eye damage, and respiratory irritation if they are inhaled. In tophat, It is important to handle these flammable chemicals with care, following proper safety protocols and wearing appropriate protective equipment to minimize the risk of fire or injury. So In a "tophat" experiment, the principal danger presented by ethanol, hexanol, and kerosene is flammability.
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what is the difference between a substance ""getting wet"" and ""being dissolved"" in a liquid at the particulate leve
The difference between a substance ""getting wet"" and ""being dissolved" is that when it gets wet it means it is being coated with liquid whereas being dissolved means that it is dispersed in liquid.
When a substance "gets wet," it means that the surface of the substance is being coated with a liquid, but the substance itself is not changing its chemical composition or dissolving in the liquid. The substance remains intact and separate from the liquid, much like a solid piece of food might become wet when it is immersed in water.
When a substance "is dissolved" in a liquid, it means that the substance has broken down into individual particles and has become evenly dispersed throughout the liquid.
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Any substance that occupies space and has a mass is defined as?
A substance that has mass and occupies space is called matter. Matter is considered as a substance that has a mass in it.
It also occupies space or volume. The matter is considered to consist of various types of particles which have different sizes as well as mass in it. The matter has the capability of existing in several ways.
The major types of existence of matter are solid, liquid and gas in which the existence depends upon the temperature or the pressure that surrounds the particulate matter. The matter of its different types can combine with the other substance in order to perform various types of ingredients.
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Which component is missing from the process of photosynthesis?
Carbon Dioxide + Water + Sunlight → _________ + Oxygen
Light Energy
Glucose
Plants
Carbon
During photosynthesis, water and carbon dioxide become glucose and oxygen.
True
False
What evidence supports a conservation law?
Energy from sunlight becomes glucose during photosynthesis.
Carbon dioxide becomes glucose and oxygen during photosynthesis.
Hydrogen is made from the breakdown of carbon dioxide during photosynthesis.
Glucose and oxygen become carbon dioxide and water during photosynthesis.
Answer: The component that is missing from the process of photosynthesis is glucose. The correct option is B.
Explanation:
Why is photosynthesis?
Additionally, almost all the oxygen in the atmosphere is due to the process of photosynthesis. If photosynthesis ceased, there would soon be little food or other organic matter on Earth, most organisms would disappear, and Earth's atmosphere would eventually become nearly devoid of gaseous oxygen.
Photosynthesis is the process by which plants and other things make food. It is an endothermic (takes in heat) chemical process that uses sunlight to turn carbon dioxide into sugars that the cell can use as energy. As well as plants, many kinds of algae, protists and bacteria use it to get food
The main purpose of photosynthesis is to transform solar energy into chemical energy, which is then stored for later use. This mechanism primarily provides energy to the planet's life systems.
Therefore, the correct option is B, Glucose.
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What is the name and molar mass of Fe2O3?
The solution is Fe2O3, which has a molar mass of 159.69 g/mol.
Fe2O3—is it rust?
Acids can easily attack Fe2O3. Because it has many of the same qualities and a similar composition to rust, iron(III) oxide is frequently referred to as rust. However, in chemistry, rust is classified as hydrous ferric oxide and is not well understood.
Why is ferric Fe2O3 called that?
Iron(III) oxide, which contains three oxygen atoms and two iron atoms, has the chemical formula Fe2O3. Fe2O3 is in a +3 oxidation state. The differential in electronegativity between oxygen and iron is what determines whether a bond will form between the two atoms. While oxygen (O2) is a non-metal, iron (Fe) is a metal.
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254. A gas cylinder contains 0.722m³ of hydrogen gas at a pressure of 10.6 atm. If the
gas is used to fill a balloon at a pressure of 0.96 atm, what is the volume in m³ of the
filled balloon?
Answer:
2928281m² gas is used to fill a balloon at a pressure of 0.96 atm, what is the volume in m³ of the
filled balloon
Match the word on the left to the correct definition or statement on the right.
1. Ionic bond a. two atoms share electrons unequally
2. Nonpolar covalent bond b. two polar molecules are attracted to each other
3. Polar covalent bond c. two atoms share electrons equally
4. Hydrogen bond d. two ions are attracted to each other
1. An ionic bond is a bond in which (d) two ions are attracted to each other, because one atom has gained an electron and one has lost an electron, creating oppositely-charged ions.
2. A nonpolar covalent bond is a bond in which (c) two atoms share electrons equally, such that the atoms involved have no charge.
3. A polar covalent bond is a bond in which (a) two atoms share electrons unequally because one atom is holding the shared electrons closer to its own nucleus, creating a slight electronegative and electropositive charge on the atoms involved.
4. A hydrogen bond is a bond in which (b) two polar molecules are attracted to each other because one is slightly electropositive and one is slightly electronegative.
What is the correct definition of an ionic bond?
An ionic bond is formed by the complete transfer of some electrons from one atom to another. The atom losing one or more electrons becomes a cation—a positively charged ion. The atom gaining one or more electrons becomes an anion—a negatively charged ion.
What is Non-polar Covalent Bond?
A non-polar covalent bond is a type of chemical bond that is formed when electrons are shared equally between two atoms. Thus, in an atom, the number of electrons shared by the adjacent atoms will be the same.
What is a polar covalent bond?
A bond formed between two atoms with a difference in electronegativities by sharing electrons is called a polar covalent bond.
What is a hydrogen bond?
Molecules that contain a hydrogen atom bound with fluorine, oxygen, or nitrogen are considered examples that show the hydrogen bonding process.
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which of the following compounds has the shortest carbon-carbon bond? a.C2H2
b.C2H4
c.C2H6
d,All have the same bond length
A) The carbon-carbon triple bond in C2H2 (ethyne or acetylene) results in the shortest carbon-carbon bond length. acetylene and HCCH.
What substance contains the shortest carbon-carbon bond?The shortest C-to-C bond is found in the triple-bonded compound ethyne. Triple bonds are shorter than single bonds, whereas the other molecules only have single C-to-C bonds.
Why is C2H2's bond length the shortest?This is due to the fact that higher s character means that the electrons in bound pairs are tightly kept together, making the bond length short and strong. C 2 H 6 is hybridizing.
Two carbon atoms in acetylene are joined together by a triple bond. This is how its structure is displayed.
H-C=C-H
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Which compound can be prepared by radical halogenation with minimal complications due to the formation of isomeric by-products?
The formation of isomeric by-products during radical halogenation can be a major issue, as it can lead to the production of impure or unwanted compounds.
To minimize the formation of these by-products, it is important to choose the right conditions for the reaction. Factors such as the stability of the radicals involved, the reactivity of the halogen, and the solvent used can all impact the formation of by-products. By selecting a compound with a simple structure and well-defined radicals, and by using a solvent that can stabilize the radicals and control the reaction rate, it is possible to minimize the formation of isomeric by-products. However, the best approach will depend on the specific conditions of the reaction and the desired outcome.
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if such an isotope existed, which one would be best to use for establishing the age of an archeological site that is about 50,000 years old?
The most reliable isotope to use to determine the age of an archaeological site that is about 50,000 years old is carbon-14.
A radioactive isotope of carbon with a half-life of roughly 5,700 years, carbon-14 decays over time. This makes it the perfect option for dating artifacts that are older than 50,000 years. Radiocarbon dating is the process of using carbon-14 to establish an archaeological site's age. The process entails calculating the amount of carbon-14 that is still present in a sample and comparing it to the amount that was initially present when the sample was alive.
The rate of carbon-14 decay can then be used to determine the sample's age. For dating archaeological materials like bones, teeth, charcoal, and wood, this technique has been used extensively.
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1. Describe some of the general patterns you observe for temperature and salinity.
Salinity:
Temperature:
2. Describe the location of at least three places in the world's oceans that have high temperatures but low salinity.
Location 1:
Location 2:
Location 3:
The answers include the following:
Some of the general patterns you observe for temperature is the temperature of a place on the Earth is largely dependent upon how strong the Sun is and salinity is that the higher the evaporation rate, the higher the salinity. The location of at least three places in the world's oceans that have high temperatures but low salinity include:Pacific Ocean, Indian Ocean and Mid-Atlantic.What is Salinity?This is also known as saltiness and it is referred to as the amount of salt dissolved in a body of water.
The higher the evaporation rate, the higher the salinity as a result of the evaporation of water which increase the concentration of salt.
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what are the [h3o ] and [oh-] ion concentrations in pure water at 100°c? given, at 100°c, kw = 49*10-14
Calculate the concentrations of hydronium and hydroxide ions in pure water at 25°C and 100°C (Kw = 1.00x10-14 and Kw = 49.0x10-14, respectively).
Describe some instances of concentration.How much of the solute has been incorporated in the solvent is indicated by the concentration of the solution. A concentration of one teaspoon of salt per two cups of water, for instance, would be indicated as 1 t salt per 2 c water.
What does concentrating in high school mean?Within the selected major, a concentration is a focused field of study. Schools don't demand that students declare a specialization, just like minors. Instead, they provide them as academic choices in order to draw students to the department and enable them to personalize their college experience.
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3.where in an atom would you expect to find electrons? protons? neutrons?
Generally, atoms are made of extremely tiny particles called protons, neutrons, and electrons. Protons and neutrons are present in the center of the atom, making up the nucleus and electrons surround the nucleus.
An electron is defined as a negatively charged subatomic particle that can be either bound to an atom or free (not bound). An electron which is bound to an atom is one of the three primary types of particles within the atom, the other two are protons and neutrons.
A neutron is defined as a subatomic particle found in the nucleus of every atom except that of simple hydrogen. The name of neutron is derived from the fact that it has no electrical charge; it is neutral. Neutrons are basically extremely dense.
Proton is defined as a small, positively charged particle of matter found in the atoms of all elements. Streams of protons which are generated by special equipment can be used for radiation treatment.
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a homogeneous mixture of one or more solutes dissolved in a solvent
A solution is a homogeneous mixture of one or more solutes dissolved in a solvent.
Solutes are substances dissolved in solvents. If the solvent particles attract more than the solute particles, they pull them apart and surround them. These particles leave the solid solute and enter the solution. During solution mixing, chemical polarity causes solvation-specific interactions.
When the solvent constitutes the majority of the combination, the solution usually has the solvent's condition. The concentration of a solution is a key parameter. Aqueous solutions contain water as a solvent. Solutes will not precipitate unless added in excess of the mixture's solubility, which causes hyper saturation.
The complete question is.
What is a homogeneous mixture of one or more solutes dissolved in a solvent?
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Which steps are involved in the SQ3R method of study?
The five phases of the SQ3R critical reading approach are survey, question, read, repeat, and revise.
What does a scientific method involve?Through testing and experiment, the scientific method establishes facts in an unbiased manner. Making a observation, formulating a theory, making a prediction carrying out a test, and then evaluating the outcomes are the important prerequisites.
What are the many kinds of methods?A procedure is a section of code that only executes when requested. Data can be sent into a method as variables. Methods, commonly referred to as functions, are used to accomplish specific activities. Why employ techniques? Code may be used by defining it only once and then utilizing it repeatedly.
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When a student adds 30.0 mL of 1.00 M HCl to 0.56 g of powdered Fe, a reaction occurs according to the equation above. When the reaction is complete at 273 K and 1.0 atm, which of the following is true?
The true statement is "HCl is in excess, and 0.100 mol of HCl remains unreacted" Therefore, option A is correct.
Given:
Molar mass of Fe = 55.85 g/mol
Mass of Fe = 0.56 g
Moles of Fe = Mass of Fe / Molar mass of Fe
Moles of Fe = 0.56 g / 55.85 g/mol
Moles of Fe ≈ 0.01 mol
According to the balanced equation, the mole ratio between Fe and HCl is 1:2. This means that for every 1 mole of Fe, 2 moles of HCl are required.
Therefore, the moles of HCl required to react completely with the given amount of Fe are:
Moles of HCl = 2 × Moles of Fe
Moles of HCl = 2 × 0.01 mol
Moles of HCl = 0.02 mol
Volume of HCl solution = 30.0 mL = 30.0 mL × (1 L / 1000 mL) = 0.0300 L
Molarity of HCl = 1.00 M
Moles of HCl = Molarity × Volume
Moles of HCl = 1.00 M × 0.0300 L
Moles of HCl = 0.0300 mol
Since the moles of HCl required to react completely with Fe are 0.02 mol and the initial moles of HCl present are 0.0300 mol, we can see that HCl is in excess.
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Your uestion is incomplete,complete question is:
Fe(s) + 2HCl(aq) ⇒ FeCl₂(aq) + H2(g)
When a student adds 30.0 mL of 1.00 M HCl to 0.56 g of powdered Fe, a reaction occurs according to the equation above. When the reaction is complete at 273 K and 1.0 atm, which of the following is true?
A) HCl is in excess, and 0.100 mol of HCl remains unreacted.
D) 0.22 L of H2 has been produced.
The correct answer is D. I can't figure out why A is wrong.
Consider the following thermochemical reaction for Kerosene: 2C12H26(I)+37O2(g)—> 24CO2(g)+26H2O(I)+15,026 KJ
A) When 21. 3 g of Co2 are made, how much heat is released?
B) If 500. 00 KJ of heat are released by the reaction, how many grams of C12H26 must have been consumed?
C) If this reaction were being used to generate heat, how many grams of C12H26 would have to be reacted to generate enough heat to raise the temperature of 750g of liquid water from 10 degrees C to 90 degrees C?
A) The heat released by the reaction can be calculated by using the equation q = ΔH = -nΔHf, where q is the heat, ΔH is the change in enthalpy, n is the number of moles, and ΔHf is the change in enthalpy of formation.
Since the reaction releases 15,026 kJ of heat per mole of C12H26, we can calculate the amount of heat released by 21.3 g of CO2 produced:
First, we need to find the number of moles of CO2 produced: n = mass / molar mass = 21.3 g / (24 g/mol) = 0.8875 mol.
Next, we can use the number of moles to find the heat released: q = ΔH = -nΔHf = -0.8875 * 15026 kJ/mol = -13038.75 kJ.
B) The amount of C12H26 consumed can be calculated by using the equation q = ΔH = -nΔHf, where q is the heat, ΔH is the change in enthalpy, n is the number of moles, and ΔHf is the change in enthalpy of formation.
Since the reaction releases 15,026 kJ of heat per mole of C12H26, we can calculate the number of moles of C12H26 consumed:
n = q / ΔHf = 500 kJ / 15026 kJ/mol = 0.03308 mol.
Finally, we can use the number of moles to find the mass of C12H26 consumed:
mass = n * molar mass = 0.03308 mol * (12 g/mol + 26 g/mol) = 0.03308 mol * 38 g/mol = 1.25 g.
C) The amount of C12H26 required to generate heat to raise the temperature of 750 g of liquid water can be calculated using the equation q = mCΔT, where q is the heat, m is the mass, C is the specific heat capacity of the water, and ΔT is the change in temperature.
First, we need to find the heat required to raise the temperature of 750 g of liquid water:
q = mCΔT = 750 g * 4.18 J/g°C * (90 - 10)°C = 261300 J.
Next, we can use the equation q = ΔH = -nΔHf, where q is the heat, ΔH is the change in enthalpy, n is the number of moles, and ΔHf is the change in enthalpy of formation, to find the number of moles of C12H26 required:
n = q / ΔHf = 261300 J / 15026 kJ/mol = 17.3 mol.
Finally, we can use the number of moles to find the mass of C12H26 required:
mass = n * molar mass = 17.3 mol * (12 g/mol + 26 g/mol) = 17.3 mol * 38 g/mol = 657 g.
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two molecules of what are needed to make one molecule of glucose
One molecule of glucose is created by the calvin cycle using six water and carbon dioxide, 18 molecules bacterial ATP, as well as 12 molecules of NADPH.
Why do you use the term glucose?Glucose, the main type of sugar found in blood, is the main energy source for bodily cells. Glucose can be produced by our bodies from food or from other substances. The symbolizes the way glucose into the cells. One molecule that controls levels of blood sugar is insulin.
Where does glucose come from?Using water, carbon dioxide, and solar energy, the preponderance of vegetation and algae manufacture glucose, which is then used to build cellulose, the most common carbohydrate in existence, there in cell walls.
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___________ refers to how reactive a substance is with oxygen.
Responses
A Combustibility
B Reduction
Answer:
A Combustibility
how to find the base dissociation constant for nickel hydroxide
The base dissociation constant ([tex]K_b[/tex]) for nickel hydroxide can be found through titration.
This would involve adding a strong acid, such as hydrochloric acid, to a solution of nickel hydroxide until the reaction reaches neutralization.
You would then measure the concentration of hydroxide ions (OH-) in the solution at various points throughout the titration. By using the data obtained from the titration, you can then calculate the Kb of nickel hydroxide using the equation: Kb = [[tex]OH^-[/tex]]²/[Ni(OH)₂].
You would need to repeat the experiment multiple times to obtain an average value for [tex]K_b[/tex] and to ensure accuracy. This value would give you an indication of the strength of the nickel hydroxide as a base.
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Classify the following reaction: when dissolved sodium chloride reacts with dissolved silver nitrate in water, aqueous sodium nitrate and solid silver chloride are made.
When dissolved sodium chloride reacts with dissolved silver nitrate in water, aqueous sodium nitrate and solid silver chloride are made. This is an illustration of double displacement reaction.
A type of chemical reaction known as a twofold displacement reaction sees the reactant ions swap positions to create new products.
Precipitate production frequently follows a double displacement process.
Covalent or ionic bonds may be present in the chemical reactions between the reactants.
While technically the bonds generated between the chemical species may be either ionic or covalent in nature, the reaction most frequently happens between ionic compounds. In double displacement processes, acids and bases also take part. The same kind of bonds that are present in the reactant molecules are also generated in the result compounds. For this kind of reaction, water often serves as the solvent.
Silver nitrate and sodium chloride react in a double displacement process. In exchange for the sodium's chloride ion, the silver gives up its nitrite ion, which causes the sodium to take on the nitrate anion.
AgNO₃ + NaCl → AgCl + NaNO₃
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molecular compounds are composed of 2 or more
The molecular compounds are composed of the two or more non metals.
The molecular compound are generally composed of the two or more non metal elements. The Molecular compounds are named as the first element comes first and then the second element comes second by using the element name plus the use of suffix - ide. The molecular compound formed by the equal sharing of the valence electrons between the atoms .
The Molecular compounds are the chemical compounds that are the form of the different molecules. The examples of the molecular compounds are water (H₂O) and the carbon dioxide (CO₂).
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Why are properties of matter, such as mass, classified as an extensive property? Select the correct answer below: a)The mass of a substance changes when a force is applied on it. b)The mass of a substance is constant as long as the substance is a solid. c)The mass of a substance depends on how much of the substance is present. d)The mass of a substance is constant, regardless of the amount of substance present.
Properties of matter, such as mass, classified as an extensive property because the mass of a substance depends on how much of the substance is present. Hence, option C is correct.
An extensive property is defined as a property that depends on the amount of matter in a sample. Mass and volume are the important examples of extensive properties. An intensive property is defined as a property of matter that depends only on the type of matter in a sample and not on the amount.
Extensive properties usually vary with the amount of the substance and include mass, weight, and volume. Intensive properties, basically, do not depend on the amount of the substance; they include color, melting point, boiling point, electrical conductivity, and physical state at a given temperature.
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