Cesium fluoride has the largest electronegativity difference of all of these diatomic compounds, with a difference of 3.19. It is important to note that because oxygen gas is a diatomic.
molecule composed of two atoms of the same element, there is no difference in electronegativity between its atoms. It has an EN of zero.Caesium fluoride may be made by reacting caesium hydroxide (CsOH) with hydrofluoric acid (HF), and the resultant salt can be refined by recrystallization. The following is the reaction: CsOH + HF CsF + H2O CsOH + HF CsF + H2O Another method for producing caesium fluoride is to react caesium carbonate (Cs2CO3) with hydrofluoric acid, and the resultant salt may then be refined by recrystallization. The following is the reaction: 2 HF + 2 CsF + H2O + CO2 = Cs2CO3 In organic solvents, CsF is more soluble than sodium fluoride or potassium fluoride. It is accessible in anhydrous form, and if water has been absorbed, it is simple to dry in vacuo by heating at 100 °C for two hours. [6] CsF has a vapor pressure of one.
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Which of the following options give the correct relationships between the decimal prefixes? Select all that apply. Pay close attention to the sign and magnitude of exponent. -1 mL= 1x10^3 microliters -1GHz=1x10^6 Hz -10^3 kg=1 g -10^9 nm=1m -10ps=1x10^-13 s
The correct relationships between the decimal prefixes is 1 mL= 1x10³ mic.
What is a decimal?
The decimal system was extended to infinite decimal places to represent any real number using an infinite sequence of digits after the decimal separator (see decimal representation). In this context, decimal numbers with a finite number of non-zero digits after the decimal separator are sometimes called trailing decimals. A repeating decimal is an infinite decimal that repeats the same sequence of digits endlessly after some plac.To know more about decimals, click the link given below:
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calculate the change in heat for the water. show all calculations. (hint: you must use the heat energy equation here: heat energy
The difference in the thermal energy of the water is 334,56 J. Thermodynamics and Heating The total energy of all the molecules that compose up anything is what is known as heat energy.
Heat is the energy that inevitably transfers from one body to another due to their disparate core temperatures. nonetheless, it is energy in action. Bond lengths and angles serve as the constant equilibrium geometries around which molecules continuously fluctuate due to rotational and vibrational motions. Pure substances are composed of molecules with a common geometrical structure. Heat is not a system's characteristic. We can use the formula Q = mcT to calculate the change in thermal energy.
Q = mc(T2 - t1)
Q = (1) 4.184 J/kg°C (80°C 20°C).
Q = 334.56 J
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The complete question is-
calculate the change in heat for the 1kg water, with initial temperature as 80°C and final temperature as 20°C. show all calculations. (hint: you must use the heat energy equation here: heat energy
metals are excellent conductors of electricity. nonmetals are poor conductors of electricity and are called insulators. some elements have the ability to conduct electricity roughly between that of metals and nonmetals. give some examples of these elements, and name the class they belong to
Examples of elements that conduct electricity between that of metals and nonmetals are carbon, silicon, and germanium.
What is electricity?Electricity is a form of energy that is created when electrons move from one atom to another. It is a form of energy that can be used to power a variety of appliances, from lights to computers to refrigerators. Electricity is created when electrical charges move through a conductor, such as a wire. It can also be stored in batteries for later use. Electricity can be very dangerous and should always be handled with care.
These elements belong to a class called semi-conductors. Semi-conductors are materials that can be manipulated to allow them to either conduct or insulate electricity depending on their application. They are an integral part of many electronic circuits, whether it be for computers, phones, or other electronic devices. Semi-conductors are also used in photovoltaic cells, which are used to convert solar energy into electricity.
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If light travels exactly 1 meter in 1/299,772,458 of a second, how many kilometers does it travel in 4.00 years? for this question, 1 year = 365.25 days.
To solve this problem, we need to convert the time in years to seconds, and then multiply it by the speed of light to find the distance traveled.
First, we'll convert the time in years to days: 4.00 years * 365.25 days/year = 1461 days
Now we'll convert days to seconds: 1461 days * 24 hours/day * 60 minutes/hour * 60 seconds/minute = 31,557,600 sec
Now we can multiply the time in seconds by the speed of light to find the distance traveled: 31,557,600 sec * (1 meter / (1/299,772,458)) = 9.461*10^16 meters
To express the distance in kilometers we need to divide the distance in meters by 1000
9.46110^16 meters / 1000 = 9.46110^13 kilometers.
So, light travels 9.461*10^13 kilometers in 4.00 years.
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2Na + Cl2 → 2NaCl
1 mol Na = 22.990 g Na
1 mol Cl2 = 70.906 g Cl2
1 mol NaCl = 58.443 g NaCl
How many grams of NaCl could you make with 1.5 moles of Na?
a
112.45 g
b
87.665 g
c
23.125 g
d
38.962 g
The salt NaHSO3 (Ka1(H2SO3) = 1.4×10-2; Ka2(HSO3-) = 6.5×10-8) undergoes hydrolysis upon dissolution in water. The complete (i.e. without any approximation made) proton balance for the system is:
This equation implies that there are two protons on the left side and two protons on the right side.
The proton balance for the systemNaHSO3 + H2O → Na+ + HSO3- + OH-
H2SO3 + 2 H2O → H3O+ + HSO3- + OH-
1.4 x 10-2 H3O+ + 6.5 x 10-8 HSO3- → 1.4 x 10-2 OH- + 6.5 x 10-8 H3O+
NaHSO3 -> Na+ + HSO3- (Ka1 = 1.4 x 10-2)
HSO3- -> H+ + SO32- (Ka2 = 6.5 x 10-8)
The complete proton balance for the system is:
NaHSO3 + H2O <=> Na+ + H3O+ + HSO3-
HSO3- + H2O <=> H+ + SO32- + H2O
NaHSO3 + H2O <=> Na+ + H3O+ + H+ + SO32-
So the proton balance is:
NaHSO3 + H2O <=> Na+ + 2 H3O+ + SO32-
The two acid dissociation constants (Ka1 and Ka2) determine the relative concentrations of the three species.At equilibrium, the concentrations of Na+, HSO3-, and SO32- will be determined by the equilibrium constants Ka1 and Ka2. The overall reaction equation for the hydrolysis of NaHSO3 can be written as:NaHSO3 + H2O <=> Na+ + 2 H3O+ + SO32-
This equation implies that the hydrolysis of NaHSO3 is a neutralization reaction, where the hydrogen ions from the acid (NaHSO3) are neutralized by the hydroxide ions in water.The two acid dissociation constants (Ka1 and Ka2) determine the relative concentrations of the three species and the pH of the solution.To learn more about The proton balance for the system refer to:
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identify the hybridization state, molecular geometry and approximate bond angle around the sulfur atom for the following molecule
The hybridization state around the sulfur atom is sp2. The molecular geometry is bent/angular, and the approximate bond angle around the sulfur atom is 120°,SO2.
What is the molecular ?
Molecular is a term used to describe the smallest particle of a substance that still has all the properties of that substance. It is made up of atoms, which are the building blocks of all matter. Atoms can bond together to form molecules, which are the smallest units of a chemical compound. Molecules are the basic units of all matter, and they can exist in different forms, such as solid, liquid, and gas. The structure of a molecule can be determined through various methods, such as spectroscopy and X-ray crystallography. By studying the molecular structure of a compound, scientists can better understand its properties and how it behaves in different situations.
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A sample of sodium sulfate (MM = 142.04 AMU/molecule) was found to contain 5.4 x 1018 oxygen atoms. What was the mass of the sample in AMUs?
The mass of the sodium sulfate sample is 0.00126grams.
How to calculate mass?The mass of a substance can be calculated by multiplying the number of moles in the substance by its molar mass as follows:
mass = no of moles × molar mass
According to this question, a sample of sodium sulfate (MM = 142.04 amu/molecule) was found to contain 5.4 x 10¹⁸ oxygen atoms. The number of moles can be calculated as follows:
no of moles = 5.4 × 10¹⁸ ÷ 6.02 × 10²³ = 0.89 × 10-⁵ moles = 0.0000089moles
mass = 0.0000089moles × 142.04 amu/molecule
mass = 0.00126grams.
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Osmosis may be defined as the movement of a solvent through a semipermeable membrane from a region of higher solute concentration to one of lower solute concentration True False
False. Osmosis may be defined as the movement of a solvent through a semipermeable membrane from a region of lower solute concentration to one of higher concentration.
Osmosis can be defined as the movement of solvent particles or water from lower solute concentration to higher solute concentration through the semipermeable membrane. This process does not require any energy. This requires only a concentration gradient. Semipermeable membranes are very thin layers of material which allows some things to pass through them. The movement of a solvent through a semipermeable membrane from a region of higher solute concentration to one of lower solute concentration is called diffusion.
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Select the type of chemical bond that most commonly forms between each combination of elements as indicated.
Metallic bond → _____
Covalent bond → _____
Ionic bond → _____
Two or more metal atoms
Metal to nonmetal
Nonmetal to nonmetal
The type of chemical bond that most commonly forms between each combination of elements is Metallic bond → metallic, Covalent bond → covalent, Ionic bond → ionic.
A metallic bond is a type of chemical bond that forms between two or more metal atoms. The metallic bond is characterized by the sharing of electrons between the atoms, creating a metallic lattice structure. This type of bonding results in a strong bond that gives metals their characteristic properties such as high melting points, ductility, and conductivity.
A covalent bond is a chemical bond in which atoms share electrons. Covalent bonds typically form between nonmetal atoms and are characterized by the sharing of electrons between atoms. Covalent bonds are typically strong and result in stable compounds. They are commonly found in compounds such as water, methane and carbon dioxide.
An ionic bond is a chemical bond in which one atom loses an electron to another atom. Ionic bonds typically form between metal atoms and nonmetal atoms. Ionic bonds are characterized by the transfer of electrons, resulting in the formation of ions. Ionic bonds are typically strong and result in stable compounds, They are commonly found in compounds such as sodium chloride (NaCl) and calcium chloride (CaCl2).
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A charged particle creates a(n) _____________field. Once this particle is in motion, this creates a(n) ____________ field.
Explain.
Answer: 1 Electric Field and
2 magnetic field
Explanation: Have a nice day
The clouds of Jupiter are composed mostly of ammonia, NH3, formed by a synthesis reaction between hydrogen, H2, and nitrogen, N2. Assuming all of the substances are gaseous, express the law of conservation of mass quantitatively for this reaction by completing the particle model drawing.
The law of conservation of mass state in the chemical reaction the "mass neither be created nor be destroyed".
The reaction is given as :
N₂ + 3H₂ ----> 2NH₃
Law of conservation of mass means the "mass neither be created nor be destroyed".
The mass of reactant :
N₂ = 2 × 14 = 28 g
3H₂ = 3 × 2 = 6 g
N₂ + 3H₂ = 34 g
The mass of the product :
2NH₃ = 2 (14 + 3) = 34 g
The mass of the reactant is equals to the mass the product. Thus, the mass is same in the reaction.
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Consider the following pair of nucleophiles in CH3OH. Which, a: F- or b: N3- is the better nucleophile? Answer typing a or b. Consider the following pair of nucleophiles in CH3OH. Which, a: CH3S- or b: H2O is the better nucleophile? Answer typing a or b.
According to the problem,Consider the following pair of nucleophiles in CH3OH. H2O is the better nucleophile.
What is the nucleophile ?
Nucleophiles are atoms or molecules that carry a negative charge and have the ability to form an electron-pair bond with a positive or partially positive atom. Common nucleophiles include hydroxide ions (OH–), amines (H2N–), and carboxylates (RCOO–). Nucleophiles are important in many organic reactions, such as substitution, elimination, and addition reactions. They are also important in biochemistry, where they facilitate enzyme-catalyzed reactions such as hydrolysis, oxidation, and reduction. In biochemistry, nucleophiles can attack the carbonaly carbon of an organic molecule, resulting in a covalent bond known as an ester or amide bond.
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label each major part and indicate you understand the process of how neurons send messages to each other.
The dendrites of the axon, labeled 1,major part that receive messages from the connecting neuron.
What is neuron?Neurons are the basic building blocks of the brain and nervous system (also known as neurons or nerve cells). Neurons are the cells in our bodies that receive sensory information from the outside world, give motor commands to our muscles, and convert and relay electrical impulses at each stage of the process.Beyond that, our interactions with them shape who we are as people. However, our approximately 100 billion neurons have close interactions with other cell types known as glia.Neurogenesis is the process by which the brain generates new neurons, which can occur in adults. To make an effective comparison, imagine a neuron as a tree. Dendrites, axons, and the cell body, or soma, are analogous to the branches, roots, and trunk of a tree.The complete question:
"This is an image of a neuron
what is the major part labeled 1?"
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The density of grain alcohol is 0.789 g/mL. Given that the density of water at 4 C° is 1.00 g/mL, what is the specific gravity of grain alcohol? Enter your answer in provided box.
Density and specific gravity are related but not the same, Specific gravity is defined as the ratio of the density of a substance to the density of a reference substance. In this case, the reference substance is water, and it is commonly assumed to be water at 4°C (39.2°F) and is generally given as 1.000 g/cm3 (or 1.000 g/ml).
So, the specific gravity of grain alcohol = Density of grain alcohol / Density of water at 4°C = 0.789 g/mL / 1.00 g/mL = 0.789.
This value is dimensionless and it is used to compare the density of different substances with water.
H₂O + SO3 → H₂SO4
Why is this a synthesis reaction?
pcb 3023 the nadh generated during glycolysis and the citric acid cycle feeds its high-energy electrons to which of the following?
Option (b) is correct. The NADH generated during glycolysis and the citric acid cycle feeds its high energy electron to the electron transport chain.
During Glycolysis and the citric acid cycle, the NADH and FADH2 molecules formed carry their electrons to the electron transport chain. This electron transport chain creates a proton gradient that leads to the production of a large amount of ATP. NADH are the high energy electron carrier used to transport electrons generated in Glycolysis and citric acid Cycle to the Electron Transport Chain. Glycolysis is said to be a process in which glucose is break down to produce energy. Glucose produces two molecules of pyruvate, ATP, NADH and water. Glycolysis process takes place in the cytoplasm of a cell.
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The given question is incorrect. The correct question is,
The NADH generated during glycolysis and the citric acid cycle feeds its high-energy electrons to which of the following?
(a) citric acid cycle
(b) the electron transport chain
(c) ADP
(d) H20
(e) FAD
The gas chromatograph, in combination with the _________________, can separate the components of a drug mixture and then unequivocally identify each substance present in the mixture.
- Mass Spectrometer
The gas chromatograph, in combination with the mass Spectrometer, can separate the components of a drug mixture and then unequivocally identify each substance present in the mixture.
A mass spectrometer can only determine a molecule's mass after it has changed into a gas-phase ion. To do this, it charges molecules electrically and converts the resulting flow of electrically charged ions into a proportionate electrical current that a data device can then read. The components of a drug mixture are separated by the gas chromatograph and mass spectrometer, which then positively identify each component. By electrically charging molecules, which results in a flow of electrically charged ions, it does this.
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he cover slip was lifted and drops of 10% nacl were added. the photograph on the right side shows the changed appearance of the cells. the observed appearance after adding the nacl is best explained by:
The observed appearance of the cells after adding the 10% NaCl is likely due to the hypertonicity of the solution.
hypertonicity refers to a solution that has a higher solute concentration than the cell, causing water to flow out of the cell and the cell to shrink and become dehydrated. This can also be observed as the cells appear to be wrinkled and contracted.This can cause water to move out of the cell due to osmosis, resulting in the cell becoming dehydrated and shrinking. This is the opposite of hypotonicity, which is a solution with a lower solute concentration, causing water to move into the cell, causing the cell to swell. In biological systems, hypertonicity can cause cells to lose function or even die if the condition is severe or prolonged.
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weak bonds, such as hydrogen bonds and van der waals forces, interacting between the r groups dna determines the order of the amino acids, the amino acids are held together by peptire bonds hydrogen bonds between the amino and the carboxyl group of different amino acids
Amino acids are held together by an amide bond, which is also called the peptide bond.
An amino acid is an organic molecule that is made up of a basic amino group (−NH2), an acidic carboxyl group (−COOH), and an organic R group (or side chain) that is unique to each amino acid. The term amino acid is short for α-amino [alpha-amino] carboxylic acid.
the interactions among R groups creates the complex three-dimensional tertiary structure of a protein. The nature of the R groups found in the amino acids involved can counteract the formation of the hydrogen bonds described for standard secondary structures.
Van der Waals (dispersion) forces contribute to interactions of proteins with other molecules or with surfaces.
correct and complete question is :
Describe the term peptide bond and its interaction between R group and How do van der Waals interactions affect Protein structure ?
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Calculate the volume in liters of a 0.12 mol/L potassium dichromate solution that contains 175. g of potassium dichromate (K,Cr₂O₂). Round your answer to 2 significant digits. OL S
The volume of the potassium dichromate solution is 15.58 liters.
What is the molar mass of potassium dichromate?The molar mass of potassium dichromate, also known as potassium bichromate, is 294.19 g/mol. Molar mass is the mass of one mole of a substance, which is defined as Avogadro's number of atoms or molecules. The molar mass of a substance can be calculated by adding up the atomic masses of all the atoms in its chemical formula. In the case of potassium dichromate, its chemical formula is K2Cr2O7. The molar mass is calculated by adding up the atomic masses of 2 atoms of potassium (K), 2 atoms of Chromium (Cr) and 7 atoms of Oxygen (O) (2* 39.0983 + 252.00 + 716.00 = 294.19 g/mol).
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Combustion analysis is commonly used to determine the empirical formula of unknown compounds containing principally C and H. For a compound containing C, H, and O only, which of the following statements is INCORRECT?
"Combustion analysis can evaluate the molecular formula of unidentified compounds containing primarily C and H," is an incorrect statement.
Combustion analysis is a technique used to determine the amounts of carbon and hydrogen present in a compound by burning a sample and measuring the volume of gases produced. It can be used to determine the empirical formula of a compound containing C, H, and O only (which gives the ratio of atoms in a compound and not the actual number of atoms) but not the molecular formula (which gives the actual number of atoms in a compound). The molecular formula of a compound can be determined by other techniques like Mass Spectroscopy, IR spectroscopy, NMR spectroscopy etc.
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Given the reactions: Mg(s) + 2H2O(l) → Mg(OH)2(s) + H2(g) For the reaction to occur at the greatest rate, 1 gram of Mg(s) should be added in the forms of
a. large chunks
c.small chunks
b. a ribbon (a thin, long piece)
d. a powder
elect all that apply which of the accompanying depictions show the electron distribution in the h2o molecule correctly? select all that apply. multiple select question. a b c d
Tetrahedral H2O has an electrical geometry, Water is classified as tetrahedral in terms of electron-group geometry since it has four electron groups.
Which statement most accurately characterizes a covalent species with four electron groups revolving around the primary atom?Two bonded pairs and two lone pairs result in a bent shape being visible. - A tetrahedral system has all four electron pairs acting as bonding partners.Tetrahedral H2O has an electrical geometry.A quantitative way to express binding polarity is the dipole moment. When the electron density is unevenly distributed within a bond or molecule, a dipole moment results.Water is classified as tetrahedral in terms of electron-group geometry since it has four electron groups.To learn more about Water refer to:
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which of the following conditions is associated with an increased total ck level in the serum?
Acute or chronic (long-term) damage or degeneration to the heart, brain, or skeletal muscles may be indicated by elevated CK levels.
What circumstances lead to an increase in CK?Cardiovascular illness, trauma, motor neuron diseases, and myopathies all cause elevated CK levels. After engaging in arduous physical activity or prolonged manual labor, individuals in good health may experience a brief increase in CK levels.Acute or chronic (long-term) damage or degeneration to the heart, brain, or skeletal muscles may be indicated by elevated CK levels.You may have some degree of cardiac damage if your CK-MB levels are elevated. Acute injury or a muscular disease may be the cause of your elevated CK-MM readings, which can indicate that you have damaged skeletal muscles. Increased CK-BB levels may indicate a recent stroke or a brain damage of some kind.To learn more about elevated CK levels refer to:
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What do you mean by 1 3 dipolar addition reaction?
The 1,3-dipolar addition, a chemical reaction between a 1,3-dipole and a dipolarophile, results in a five-membered ring. The first 1,3-dipolar cycloadditions weren't discovered until the latter part of 19th century.
The early 20th century, following the discovery of 1, 3-dipoles. From the food our bodies digest to the way the sunlight we receive is created, chemical reaction occur all around us. Understanding physical and chemical changes is essential before beginning chemical processes. A molecule is defined as a collection of two or more atoms held together by the attractive forces known as chemical bonds; depending on the context, the term may or may not include ions that fit this criteria.
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Please help!
When vinegar and baking soda react with
each other in a sealed bag, a gas is
produced. The gas is trapped and the bag
inflates. Which of these procedures would
be best for determining the minimum
amounts of vinegar and baking soda
needed to completely inflate the bag?
JUse different-sized bags, the same
temperature, and the same amounts
of each substance.
K Use different-sized bags, different
temperatures, and the same amounts
of each substance.
L Use the same-sized bags and the
same temperature, and change the
amounts of each substance.
M Use the same-sized bags and
different temperatures, and change
the amounts of each substance.
When vinegar and baking soda react with each other in a sealed bag, a gas is produced. The gas is trapped and the bag inflates. Use the same-sized bags and different temperatures, and change the amounts of each substance. so, option(M) is correct.
What is temperature?
Temperature is a gauge for an object's average particle kinetic energy. The mobility of these particles rises along with the temperature. With a thermometer or a calorimeter, temperature is measured.
What is substance?
Chemical elements and their natural or artificially created compounds are considered substances. A chemical reaction is typically required to create a substance during a manufacturing process.
Therefore, When vinegar and baking soda react with each other in a sealed bag, a gas is produced. The gas is trapped and the bag inflates. Use the same-sized bags and different temperatures, and change the amounts of each substance. so, option(M) is correct.
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How do I even answer and draw this? Can someone answer this for me please
ewhat grade is this
Explanation:
Which of the following compounds contains the greatest percent by mass of nitrogen?
(A) NH3
(B) HCN
(C) N2O
(D) NI3
NH3 contains the greatest percent by mass of nitrogen.
What is nitrogen?
All living things require the element of nitrogen. It is a colorless, odorless and tasteless gas that makes up 78% of the Earth's atmosphere. Nitrogen is found in all organic molecules, including proteins, nucleic acids, and other essential molecules for life. Nitrogen is essential for plant growth and is a key component of the nitrogen cycle. Nitrogen is important to the production of fertilizers and is used in industrial processes such as steel making and welding. Nitrogen also plays an important role in the environment, as it is part of the ozone layer and helps to reduce the amount of UV radiation that reaches the Earth's surface. Nitrogen is also used in many medical and pharmaceutical products, such as anesthetics and chemotherapy drugs
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Which substance has a molar mass of 95.2g?
AlCl3
BaCl2
P2O5
MgCl2
The substance which has a molar mass of 95.2 grams is MgCl₂ or magnesium chloride.
What is molar mass?
Molar mass of a compound or a molecule is defined as the mass of the elements which are present in it.The molar mass is considered to be a bulk quantity not a molecular quantity. It is often an average of the of the masses at many instances.
The molecular mass and formula mass are used as synonym for the molar mass.It does not depend on the amount of substance which is present in the sample.It has units of gram/mole.
Molar mass of magnesium chloride is calculated as, 24.2+(35.5×2)=95.2 g.
Thus, the substance which has a molar mass of 95.2 grams is MgCl₂ or magnesium chloride.
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