The molar mass of NaBr will be 102.89 g/mol.
Sodium bromide (NaBr) is a white crystalline ionic compound that is made up of sodium cations (Na⁺) and bromide anions (Br⁻). It is used in various applications, including as a sedative, in the oil industry, and in the manufacture of photographic chemicals.
The molar mass of NaBr can be calculated by adding the atomic masses of sodium (Na) and bromine (Br) in one mole of NaBr. The atomic mass of sodium is 22.99 g/mol and the atomic mass of bromine is 79.90 g/mol, as found in the periodic table.
Therefore, the molar mass of NaBr is:
Molar mass of NaBr = atomic mass of Na + atomic mass of Br
Molar mass of NaBr = 22.99 g/mol + 79.90 g/mol
Molar mass of NaBr = 102.89 g/mol
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A scientist measures a glass of water and finds that it is 240 g. What did the scientist measure?
Answer:
the glass and water maybe
What would be the effect of ACh binding to its receptor on the postsynaptic muscle cell?A.) Ca2+ would leak out of the cell as Na+ flowed into the cell.B.) Ca2+ would flow into the cell as Na+ flowed out of the cell.C.) Na+ would flow into the cell and K+ would flow out of the cell.D.) Only Na+ would flow into the cell.
Na+ would enter the cell while K+ would exit. In the postsynaptic or postjunctional membrane, ACh diffuses and binds to certain receptors.
What happens in the postsynaptic cell when acetylcholine binds to the receptor?In the postsynaptic or postjunctional membrane, ACh diffuses across the synaptic cleft and binds to specific receptors. An altered conformation of a membrane channel that is selectively permeable to both Na+ and K+ results from the binding of ACh to its receptors.
When ACh binds to its receptors, it modifies the structure of a membrane circuit that is selectively permeable to both Na+ and K+. When cholinergic receptors on skeletal muscle fibres interact with each other, ligand-gated sodium channels inside the cell membrane are opened.
The muscle fibre is then exposed to sodium ions, which causes the muscle to contract. By stimulating nonpostsynaptic AChRs, ACh specifically inhibits presynaptic nerve terminal specialisation and postnatal AChR cluster (synaptic differentiation), and by inhibiting postsynaptic AChRs, it inhibits motor short tapered bandwidth or engine axon splitting (synaptic growth).
Ion channels in the muscle fibre membrane are opened by the neurotransmitter acetylcholine (ACh) attaching to postsynaptic receptors.
The complete question is;
What would be the effect of ACh binding to its receptor on the postsynaptic muscle cell?
A.) Ca2+ would leak out of the cell as Na+ flowed into the cell.
B.) Ca2+ would flow into the cell as Na+ flowed out of the cell.
C.) Na+ would flow into the cell and K+ would flow out of the cell.
D.) Only Na+ would flow into the cell.
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What is the electron configuration of Sulfur 16?
The electronic configuration of the Sulfur with the atomic number of 16 is as : 1s² 2s² 2p⁶ 3s² 3p⁴ .
The atomic number of the sulfur is 16. The sulfur has the total number of the electrons is 16 , the number of the protons are 16 and the number of the neutrons are the 16. The electronic configuration of the sulfur is as follows :
The electronic configuration of the sulfur, S = 1s² 2s² 2p⁶ 3s² 3p⁴
The the Sulfur belongs to group 16 in the Modern periodic table. The Sulfur is placed in the third period in the modern periodic table.
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A reaction in which a compound breakdown into two or,more simpler substances is
A. Displacement reaction.
B. Neutralisation reaction.
C. Decomposition reaction.
D. Endothermic reaction.
A reaction in which a compound breakdown into two or more simpler substances is called decomposition reaction (C)
A decomposition reaction is a chemical process in which a single compound is broken down into two or more constituent parts that are more straightforward. In most cases, the decomposition reaction can be expressed as:
AB ⇒ A + B
The majority of decomposition reactions require an energy input in the form of heat, light, or electricity. Several typical instances of decomposition reactions include the chemical transformation of hydrogen peroxide into water and oxygen as well as the transformation of water into hydrogen and oxygen. Consequently, a decomposition reaction is a chemical reaction that may be simply defined as a reaction in which one reactant decomposes into two or more products.
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A solution is prepared by dissolving 17. 75 g sulfuric acid, h2so4, in enough water to make exactly 100. 0 ml of solution. If the density of the solution is 1. 1094 g/ml, what is the weight % h2so4 in the solution?.
The weight percent of H₂SO4in the solution is 15.98%.
To calculate the weight percent of H₂SO4in the solution, we need to first find the mass of H₂SO4in the solution. We can use the molarity of the solution and the molar mass of H₂SO4to calculate the mass of H₂SO4present:
Calculate the number of moles of 4:
Molar mass of H₂SO4 = 2(1.008 + 32.06 + 4(16.00)) = 98.08 g/mol
Number of moles of H₂SO4= mass of H₂SO4 / molar mass of H₂SO4
= 17.75 g / 98.08 g/mol
= 0.1809 mol
Calculate the mass of the solution:
Mass of the solution = volume of the solution x density of the solution
= 100.0 ml x 1.1094 g/ml
= 110.94 g
Calculate the mass of H₂SO4in the solution:
Mass of H₂SO4in solution = number of moles of H₂SO4x molar mass of H₂SO4
= 0.1809 mol x 98.08 g/mol
= 17.73 g
Now that we know the mass of H₂SO4in the solution, we can calculate the weight percent of H₂SO4:
Weight % H₂SO4= (mass of H₂SO4/ mass of solution) x 100%
= (17.73 g / 110.94 g) x 100%
= 15.98%
Therefore, the weight percent of H₂SO4in the solution is 15.98%.
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Calculate the solubility (in m) of o2 in the blood of a scuba diver at a depth of 100 feet, where patm = ~3 atm.
The solubility of O₂ in blood at a depth of 100 feet (3 atm) is 2.32 × [tex]10^{-3[/tex] mol. This can be calculated using Henry's law.
The solubility of O₂ in blood at a partial pressure of 3 atm can be calculated as follows:
solubility (m) = kH * patmwhere kH is the Henry's law constant for O₂ in blood, and patm is the partial pressure of O₂ in atmospheres. The value of kH can be found from experimental data or from tables of Henry's law constants.
It is known that the solubility of O₂ in blood increases with increasing partial pressure, so the solubility of O₂ in blood at a depth of 100 feet (3 atm) is likely to be higher than it would be at the surface (1 atm).
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Halogens on two adjacent carbons in a benzene ring are in the:
para-position
meta-position
ortho-position
none of the above
Halogens on two adjacent carbon atoms in a benzene ring are in the para position.
What is an atom?An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.
The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.
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Answer:
the correct answer is ortho-position
a collection of amino acids could be used to build a
A protein could be created from a set of amino acids. A naturally occurring, incredibly complex compound known as a protein is made up of amino acid residues connected by peptide bonds.
What is an amino acids?Proteins are made of substances called amino acids. The components of life are amino acids and proteins. Amino acids are what remain after proteins have been digested or broken down. Proteins are composed of amino acids. You require 20 of these for your body to function properly. They are the molecules that all living things require to build protein. 11 of the essential amino acids are produced by your body. Body protein as well as other crucial nitrogen-containing substances including creatine, peptide hormones, and some neurotransmitters cannot be produced without amino acids. Although allowances are expressed in terms of protein, a biological requirement is for amino acids.The substances known as amino acids are those whose molecules include both carboxylic acid (COOH) groups and the amino (NH2) group.To learn more about amino acids refer to:
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What type of compound is KBr?
KBr is an ionic compound . It is made up of an ionic link between a metal (potassium, K) and a nonmetal (bromine, Br).
As the bromine atom in KBr receives an electron to become a negatively charged ion, the potassium atom loses an electron to become a positively charged ion (K+) (Br-). The ionic bond in KBr is produced by the resultant attraction between the positive and negative ions.
An ionic compound is a chemical compound composed of positively charged ions (cations) and negatively charged ions (anions) that are held together by electrostatic forces of attraction. These compounds are formed when one or more electrons are transferred from a metal atom to a nonmetal atom, resulting in the formation of ions with opposite charges.
Ionic compounds typically have high melting and boiling points, are brittle, and are good conductors of electricity in the molten or aqueous state.
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What is the systematic name of HNO2?
Nitrous acid is the chemical name for HNO₂ and it is its systematic name.
Nitric acid has the chemical formula HNO₃. Compared to nitrous acid, it is more potent and stable. This is due to the fact that its conjugate base is more stable than that of nitrous acid. H₂N₂O₂ is the chemical formula for hyponitrous acid. HNO₂ is a wobbly, unstable, and mildly acidic substance. It is sometimes referred to as a nitrogen oxoacid. Its molecular weight is 47 g/mol. HNO₂ has a boiling point of 158°C.
Nitrous acid is commonly produced by acidifying nitrite salt with mineral acid. As a result, nitrous acid is the chemical term or the systematic name for HNO₂.
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Can a chemical name be used as a chemical identifier?
The harmful substance is recognized by its product identity. The chemical name, code number, or batch number are a few examples of possible values.
What is code number?a recognized practice wherein characters from one character set are assigned to characters from another.The elements are listed in the current periodic table from higher atomic number to lower. The number of protons that make up an atom's nucleus is known as the atomic number. An element can be identified by proton count (i.e., an element with 6 protons is a carbon atom, no matter how many neutrons may be present).The word "atomic number," which is typically represented by the letter Z, refers to the quantity of protons that make up an atom's nucleus. This quantity is equivalent to the quantity of electrons that make up an uncharged atom. These include bar codes, ISBNs, ASCII codes, postal codes, and bank account numbers. Many of these modern codes use a checking mechanism, also known as a check digit.To learn more about code number refer to:
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These players train by pushing a massive object. If the players produce a net force of 150 N, and the object has a mass of 75 kg, what is the object’s acceleration?
2m/s^2 is the object’s acceleration.
Describe a force.
A push or pull that an object experiences as a result of interacting with another item is known as a force. Every time two items interact, a force is exerted on each of the objects. The force is no longer felt by the two objects when the interaction ends.
According to Newton's second law of motion, the force is equal to the change in momentum divided by the change in time. Force is equal to the mass times the acceleration for a constant mass.
Force ⇒ m.a
F ⇒ 150N
m ⇒ 75kg
a ⇒?
a ⇒ F/m
⇒ 150/75
⇒ 2m/s^2
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true or false. To maintain beer quality it is important to maintain consistent calcium and pH levels.
To maintain the quality of beer, it is important to maintain consistent calcium and pH levels. So the statement is true.
Calcium is important for yeast health and contributes to the beer's flavor and texture.
while pH affects yeast activity and can impact the stability and flavor of the beer. If the levels of calcium and pH fluctuate too much, it can lead to issues with fermentation and negatively affect the quality of the beer.
Maintaining consistent levels of calcium and pH in beer can also impact the clarity and stability of the final product.
Therefore, consistent levels of calcium and pH are crucial in maintaining the quality of beer.
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Which two rings have approximately the same bond angle in their favored conformations? a. cyclopropane b. cyclobutane c. cyclohexane d. cyclopentane e. cycloheptane
The two rings with approximately the same bond angle in their favored conformations are a) cyclopropane and c) cyclohexane.
Both rings have a bond angle of approximately 120 degrees, which allows them to be in their most stable conformation. In cyclopropane, the three carbon atoms are arranged in a planar triangle, with each bond angle being approximately 120 degrees.
In cyclohexane, the six carbon atoms are arranged in a regular hexagon, with each bond angle being approximately 120 degrees. The bond angles in both of these rings are approximately the same because both rings are planar, allowing them to form their most stable conformations.
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What is the equation for the creation of carbonic acid found in rainwater?
The equation for the creation of carbonic acid found in rainwater is:
CO₂ + H₂O → H₂CO₃
In this equation, carbon dioxide (CO₂) reacts with water (H₂O) to form carbonic acid ( H₂CO₃).
Carbonic acid is a weak acid that is formed when carbon dioxide dissolves in water. This process occurs naturally in the atmosphere when carbon dioxide in the air dissolves in rainwater, creating carbonic acid. Carbonic acid is also produced when carbon dioxide dissolves in seawater, which can have significant effects on the ocean's pH balance and the growth and survival of marine organisms.
The creation of carbonic acid in rainwater is important to understand as it can contribute to the acidification of soils and bodies of water, which can have negative impacts on plants, animals, and ecosystems.
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p-Fluoroanisole reacts with sulfur trioxide and sulfuric acid. Draw the major product of this substitution reaction; if applicable. minimize formal charges via expanded octets. Assume 1 equivalent of reagents used.
The major product of the substitution reaction between p-fluoro anisole and sulfur trioxide in sulfur acid, assuming one equivalent of reagents is used, is p-fluorobenzene sulfonic acid.
The mechanism of this reaction proceeds via electrophilic aromatic substitution, where sulfur trioxide is the electrophile. The reaction occurs in two steps, the first of which is the generation of a sulfonic acid anhydride intermediate. The second step involves the attack of the aromatic ring of p-fluoro anisole by the sulfonic acid anhydride intermediate, followed by deprotonation to yield the final product, p-fluorobenzene sulfonic acid.
The sulfonation of p-fluoro anisole with sulfur trioxide and sulfuric acid is an example of a Friedel-Crafts-like electrophilic aromatic substitution. The reaction provides a useful method for the introduction of sulfonic acid groups onto aromatic compounds, which can be useful for the preparation of sulfonate esters or sulfonamide derivatives. The product p-fluorobenzene sulfonic acid is a versatile intermediate in organic synthesis, which can be used for the preparation of various substituted benzene sulfonic acids or sulfonamides.
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The Particulate Nature of Matter -
Drag all of the atoms and molecules into correct boxes.
pure substance
and an element
mixture of an
element and a
compound
The first diagram shows pure elements and the second diagram shows molecules. The third one is compounds and the fourth one is mixtures. Except mixtures, all are pure substances in their pure form.
What is are compounds ?Compounds are the combination of two or atoms of different elements. They are of different types, like ionic compounds, covalent compounds, coordination compounds etc.
Here, elements and molecules only contains the same thing itself and they are pure substances. Similarly compounds with out the presence of addition substance are pure substances.
Mixtures are combinations of two or more individual substances or the mix of two or more pure substances. The third diagram represents a mixture of different compounds.
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The Cyclohexane Ring Is Essentially Free Of Ring Strain Because Check All That Apply. There Are Neither Eclipsed Nor Gauche Interactions In ____
The cyclohexane ring is essentially free of ring strain because:
What is cyclohexane?
Cyclohexane is a cyclic hydrocarbon with the molecular formula C6H12. It is a colorless, flammable liquid that is commonly used as a nonpolar solvent in chemical reactions and as a starting material for the synthesis of other compounds. Cyclohexane is a cycloalkane, which means it contains a closed ring of carbon atoms.
There are no eclipsed interactions in the chair conformation of cyclohexane.There are no gauche interactions in the chair conformation of cyclohexane.The bond angles in the chair conformation of cyclohexane are close to the ideal tetrahedral angle of 109.5 degrees, which minimizes the angle strain in the molecule.The chair conformation of cyclohexane allows for maximum separation of the substituents on the ring, which minimizes the torsional strain in the molecule.All of these factors contribute to the stability of the chair conformation of cyclohexane and the absence of ring strain in the molecule.
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How does C6H12O6 dissociate?
The glucose with the molecular formula of C₆H₁₂O₆ does not dissociates into the ions it will remain same as the molecule.
The glucose that is the C₆H₁₂O₆ is the covalent compound. The covalent compound is the compound which is formed in between the atoms or the molecules with the mutual sharing of the electrons. This compound contains the three non metallic elements. When the non metal bond they will share the electron pairs and form the covalent compound. It is typical example of the nonelectrolyte. The Glucose is also known as the which sugar dissolves readily in water.
Thus, the glucose does not dissociates in to the ions it stays same as the molecule.
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Identify the items needed to run a spectrophotometric experiment. Choose one or more: A. spectrophotometer B. Hot plate C. blank solution D. sample solutionE. cuvette F. stir bar
The items required to run the spectrophotometry experiment exists Spectrophotometer, Blank solution, Sample solution, Cuvette and Stir bar.
What is meant by spectrophotometric experiment?Spectrophotometry is an experimental method for determining the concentration of solutes in a particular solution by estimating the amount of light that each solute absorbs. Because specific substances will absorb certain light wavelengths at various intensities, this technique is effective.
By measuring the intensity of light as a beam of light travels through a sample solution, a technique called spectrophotometry can determine how much light a chemical component absorbs.
The spectrophotometer is the device used to calculate how much light the sample absorbs. In order to measure the sample's light's intensity, a light beam will be directed through the sample. The tool is employed in both color measurement and color monitoring.
In a number of spectroscopic experiments, the spectrophotometer is employed to ascertain the peak's wavelength.
Therefore, the correct answer is option A. Spectrophotometer
C. Blank solution
D. Sample solution
E. Cuvette
F. Stir bar.
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What is the mass of the object if it has a density of 657g/ml and a volume of 32 mL
We can use the formula for density to calculate the mass of the object:
Density = Mass / Volume
Rearranging the formula, we get:
Mass = Density x Volume
Substituting the given values of density and volume, we get:
Mass = 657 g/mL x 32 mL = 21,024 g
Therefore, the mass of the object is 21,024 g or 21.024 kg (rounded to three decimal places).
What is m in chemistry?
Answer:
Possibly molar.
Explanation:
It depends on the context in which it is used. If it appears as 1.52m, it likely means 1.52 Molar, or 1.52M. Molar is defined as moles/liter. It is usually capitalized, but I've increasingly seen it appearing as a small "m." The letter "n" typically means actual moles of a substance. If the letter m appears as part of an equation, it should be defined at that point, or in the previous paragraphs.
Constants Four electrons are located at the corners of a square 10.0 nm on a side, with an alpha particle at its midpoint. Consider the alpha particle as your system.
The work is needed to move the alpha particle to the midpoint of one of the sides of the square is - 7* 10⁻²² J
At the intersection of a square, four electrons are placed. Therefore, we will start by determining the electrostatic potential at the square's center.
So, it is shown here as
V = 4 kQ/r
Where.
r= distance of corner of the square from it center
r = a/√2
r = 10 nm/ √2 = 7.07 nm
Q= e = -1.6 x 10⁻¹⁹ C
The net potential is given by;
V = 4 x 9 x10⁹ x (-1.6 x 10⁻⁹)
7.07 x 10⁻⁹
V= 0.815 V
at this time, the alpha particle's potential energy
Ui = qV
Ui = 2 x 1.6 x 10⁻¹⁹ x - 0.815 = -2.6 x 10⁻¹⁹J
Then, one of the sides' midpoints Provided that's the electrostatic potential as
V = 2 kQ + 2 kQ
r₁ r₂
So,
r₁ = a/2 = 5nm
r₂ = √(a/2)²+a² = √5 a /2
r₂ = 11.2 nm
now potential is given as
V = 2 9x 10⁹ * (-1.6 x 10⁻¹⁹) + 2 9x 10⁹ * (-1.6 x 10⁻¹⁹)
5x 10⁻⁹ 11.2 x 10⁻⁹
V = - 0.576 - 0.257 = - 0.833V
Final potential energy is now presented as
Uf = q * V = 2 * 1.6 * 10⁻¹⁹ -0.833 = -2.67 x 10⁻¹⁹ J
Now work done in this process is given as
W = Uf - Ui
W = (- 0.267 * 10⁻¹⁹) - (-0.26 * 10⁻¹⁹)
W = - 7* 10⁻²² J
Your question is incomplete but most probably your full question was
Four electrons are located at the corners of a square 10.0 nm on a side, with an alpha particle at its midpoint. Consider the alpha particle as your system. How much work is needed to move the alpha particle to the midpoint of one of the sides of the square
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What combinations of positive or negative AH, and positive or negative As, can indicate a spontaneous reaction according to the Gibbs free energy equation (AG- AH-TAS)?
According to the Gibbs free energy equation (ΔG = ΔH - TΔS), the spontaneity of a reaction is determined by the sign and magnitude of the enthalpy change (ΔH) and the entropy change (ΔS).
If ΔH is negative (exothermic) and ΔS is positive (increase in disorder), the reaction will be spontaneous at all temperatures. This indicates that the products are more energetically stable than the reactants.
If ΔH is positive (endothermic) and ΔS is negative (decrease in disorder), the reaction will be non-spontaneous at all temperatures. This indicates that the products are less energetically stable than the reactants.
If ΔH is positive and ΔS is positive, the reaction will be spontaneous only at high temperatures. This indicates that the products are less energetically stable than the reactants, but the increase in entropy at high temperatures can drive the reaction forward.
If ΔH is negative and ΔS is negative, the reaction will be spontaneous only at low temperatures. This indicates that the products are more energetically stable than the reactants, but the decrease in entropy at low temperatures can drive the reaction forward.
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how an eruption of a volcano
Radiometric dating is possible because the rates of decay of radioactive isotopes _____.answer choicesa.change over timeb.change from place to placec.are constantd.vary widely
The Radiometric dating is the possible because the rates of the decay of radioactive isotopes are constant. The correct option is c. are constant.
The Radiometric dating is possible because of the rates of the decay of the radioactive isotopes. They use the absolute radiometric dating that requires the extremely long-lived parent nucleus. The Radiometric dating helps to calculates the age in the years for the geologic materials by the measuring of the presence of the short-life radioactive element. The radioactive dating or the radioisotope dating is the technique that is used to date the materials such as the rocks or the carbon.
Thus, the rates of the decay of radioactive isotopes are constant in the in the Radiometric dating .
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a molecule that can absorb energy within the wavelengths of visible light is
this is a tiny unit of an element that retains the properties of the element.
The tiny unit of an element that retains the properties of the element is called an atom.
Atoms are the basic building blocks of matter and are composed of a nucleus, which contains positively charged protons and neutral neutrons, surrounded by negatively charged electrons that orbit the nucleus. The unique arrangement of protons, neutrons, and electrons in an atom determines its chemical and physical properties, such as its atomic number, mass, and reactivity.Atoms are incredibly small and are typically measured in units of picometers or angstroms.
Each element is defined by the number of protons in its atomic nucleus, which is known as its atomic number. For example, carbon atoms have six protons in their nucleus, while oxygen atoms have eight protons. The number of neutrons in an atom's nucleus can vary, resulting in isotopes of the same element with different atomic masses.
Atoms can combine with other atoms to form molecules and compounds through chemical bonds, including covalent bonds, ionic bonds, and metallic bonds.
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_Pb(NO3)2 + _K2CrO4 = _PbCrO4 + _KNO3
Answer:
1,1,1, and 2
Explanation:
What are the types of chemical reactions answer key?
There are five common types of reactions which are combination, decomposition, single-replacement, double-replacement, and combustion reactions.
Combination Reactions are defined as the reactions in which two or more reactants combine between itself in order to form one product.
Decomposition reactions are defined as the processes in which chemical species break up into simpler parts. Basically, decomposition reactions require input of energy.
A single replacement reaction, also called a single displacement reaction, is defined as a reaction in which one element is substituted for another element in a compound to form a different product.
A double-replacement reaction is defined as a reaction in which the positive and negative ions of two ionic compounds usually exchange places to form two new compounds.
Combustion is defined as a chemical process in which a substance reacts rapidly with oxygen and gives off heat in the product side.
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