the combustion of 40.5 mg of a compound extracted from the bark of the sassafras tree and known to contain c, h, and o produces 110.0 mg co2 and 22.5 mg h2o. the molar mass of the compound is 162 g/mol. what is the molecular formula?

To identify the charge of each element in a reaction, an atom becomes more stable, valence electrons are either simply taken up or released.

The periodic table helps us understand how different chemical elements interact with each other. As they become more stable, atoms either gain or lose valence electrons.

Nonmetallic elements gain electrons to produce negatively charged ions, while metals lose electrons to form positively charged ions. Metals (located on the left of the periodic table) will be positive, while non-metals (on the right) will be negative.

The particular ionic charge elements, however, must be known in order to identify the charges. The periodic table is also helpful when figuring out the electron configurations of atoms.

So, Atoms either simply take up or lose valence electrons as they becoming more stable.

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Answer: 20 C

Explanation:

I would put it in 20 C because it is closer to the 20 C than the 30 C (it is below 25 C).

Because it tells them about the amount of radiation that a given substance will give off.

The definition of radiation is energy that emanates from a source and moves at the speed of light through space. This energy has wave-like characteristics and is surrounded by an electric and magnetic field. Electromagnetic waves are another name for radiation.

Spectrum of electromagnetic waves shown In nature, there are many different types of electromagnetic radiation. One example is visible light.

The highest energy radiation comprises x-rays, gamma rays, and ultraviolet light.

Both X-rays and gamma rays are extremely energetic. They can take electrons out of atoms when they engage with them, ionizing the atom in the process. The four types of ionizing radiation that radioactive atoms can emit are alpha particles, beta particles, gamma rays, and neutrons.

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10.4 g of water can be formed by the reaction of 15.0 g of aluminum hydroxide with excess nitric acid.

Define mass.

It is the most basic component of matter and one of the fundamental quantities in physics. Mass is a term used to describe how much matter is there in a body. The kilogram (kg) is the SI unit of mass.

Al(OH)3 will react with HNO3 to form Al(NO3)3 and H2O

3Al(OH)3 + 3HNO3 → Al(NO3)3 + 3H2O

0.19229 × 3 = 0.57687 mol of H2O

Mass of H2O = mol×MW

= 0.57687×18

= 10.38366 g of H2O

Hence, 10.4g of water is formed.

Therefore, 10.4 g of water can be formed by the reaction of 15.0 g of aluminum hydroxide with excess nitric acid.

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Molecular Orbital Theory is used to explain phenomena that cannot be explained by Lewis Structures, such as the delocalization of electrons, the formation of molecular orbitals, and the stabilization of molecules.

Molecular Orbital Theory provides a more elaborate description of chemical bonding than Lewis Structures by taking into account the wave-like nature of electrons. It uses quantum mechanics to explain the behavior of electrons in molecules, and the formation of molecular orbitals from the overlap of atomic orbitals. Molecular Orbital Theory also accounts for delocalization of electrons, which occurs when electrons spread across more than one atom, as well as the stabilization of molecules, which is the process of molecules forming more stable bonds. These phenomena, which cannot be explained by Lewis Structures, are solved by applying Molecular Orbital Theory.

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It is a true statement that; pressure has little effect on the solubility of liquids and solids because they are almost incompressible.

We know that the term compressibility has to do with the change in the properties of an object by the mere application of pressure on the object that is under study. The factor of compressibility is what is going to determine whether or not a solid, liquid or gas can be able to have  a solubility that is affected by the pressure of the substance.

We have to bear in mind that when we are talking about pressure in science that our minds would have to go to the force per unit area of the substance that is under study in each particular case.

We know that the solid and the liquid  is not as compressible as the gas because the solid and the gas does have a fixed volume while the gas does not have a fixed volume thus it is going to take on the volume of the container that carries it.

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The acid‑catalyzed hydration of 3‑methyl‑1‑butene. for each of the four steps, add one or two curved arrows to the reactant side to show the mechanism is followed by the Markownikov's rule.

The acid‑catalyzed hydration of 3‑methyl‑1‑butene mechanism is given as follows :

CH₃ - CH - C = CH₂  ---->   CH₃ - CH - C - CH₂⁻   +   OH⁻   ---->  

          |      |                                      |      |

        CH₃   H                                 CH₃  H          

CH₃ - CH - CH - CH₂⁻   H⁺ ----->   CH₃ - CH - CH - CH₃

          |      |                                                 |     |

        CH₃  OH                                      CH₃    OH

The above mechanism is followed by the rule of the Markownikov's rule.

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The number of molecules in 9.4 moles of ibuprofen is equal to  5.66 × 10²⁴.

A mole of a substance can be described as an international standard unit that is used to calculate a given count of any particles. The particles that are counted in the unit of the mole are as chemically identical entities, individually distinct.

A mole can be used to calculate atoms, molecules, ions, or other particular particles. The 6.023 × 10 ²³ number of units present in one mole is known as Avogadro’s constant.

Given, the number of moles of ibuprofen = 9.4 mol

The number of molecules of ibuprofen in one mole = 6.023 × 10²³

The number of molecules of ibuprofen in 9.4 moles = 6.023 × 10²³ ×9.4

Number of molcules of ibuprofen = 5.66 × 10²⁴ molecules

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The pressure of the gas is 1285.6atm

Since,

T=27°C+273.15=3000.15K

n=0.85mol

V=1.65L

R=8.3144598

From ideal gas law

P= nRT/V

P=0.85×8.3144598×300.15/1.65

P=1285.6 atm

What is the ideal gas law?

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Vehicle criterion pollutant emissions: Over the past 30–40 years, vehicle tailpipe emissions of particulate matter (PM), nitrogen oxides (NO x), carbon monoxide, and hydrocarbons (HCs) have increased (CO).

Additionally, hydrocarbons (HCs) have drastically decreased. A chemical or energy that is introduced into the environment and has negative consequences or reduces the usability of a resource is referred to as a pollutant or new entity. These may form naturally (such as minerals or extracted substances like oil) or may be manmade in origin. The term "Carbon Emissions" refers to the total amount of carbon dioxide, expressed in tones, produced when each relevant quantity of fuel is multiplied by the appropriate pollutant emissions factor.

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Answer: Theres nothing to see here

Explanation: nothing at all,

Step 1: Look at the atoms in the molecule and look up their electronegativity. Use the following table attached below to look up the electronegativities of the first 20 elements.

Step 2: Calculate the difference between the electronegativities of the atoms across each bond by subtracting the lower electronegativity from the higher electronegativity.

Step 3: Determine the bond type based on the differences in electronegativities. Ionic bonds have differences in electronegativity of 1.7 and higher. Polar-covalent bonds have differences in electronegativity of between 1.7 and 0.4. Covalent bonds have differences in electronegativity of 0.4 or lower.

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Answer: true

Explanation: electrons can help the observer determine things like electronegativity and atomic radius.

The rate of primary succession slow as compared to secondary succession because it starts where there is no soil, primary succession moves much more slowly than secondary succession.

Where there has never been an ecosystem, primary succession occurs. Due to the fact that it starts on bare rock, the process is incredibly slow. A retreating glacier doesn't leave any soil behind. A volcanic eruption's lava solidifies into bare rock. Because some cones or seeds are probably still there after the disruption, secondary succession occurs more quickly than primary succession. When native biotic communities have been disrupted, such as when woods have been cut down or burned, when farms have been abandoned, or when lands have been inundated, secondary succession begins. Secondary succession occurs more quickly than primary succession because there is some soil or silt present.

Fertile soil can be created naturally over a period of several hundred to several thousand years. Bacteria and lichens, which can survive without the soil, will likely be the first pioneer species to populate the bare rock.

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Yes, volume is always 22.4 L at STP.

STP is commonly used to define standard conditions for temperature and pressure which is important for the measurements and documentation of chemical and physical processes.

This empirical relationship can be derived from the kinetic theory of gases under the assumption of a perfect (ideal) gas.

The law applies approximately to real gases at sufficiently low pressures and high temperatures.

At STP, all gases have the same volume for 1 mole of gas, and this volume is always 22 L.

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The four electronic transition effects is :

1) σ -  σˣ transition occurs in the saturated hydrocarbon in which only sigma bonds are formed and no non bonding electrons.

2) n -  σˣ transition occurs in which non bonding electrons are present.

3) π - πˣ transition  occurs in which the unsaturated hydrocarbons contain the double or triple bond.

4) n - πˣ transition , this type of transition occurs in which the non bonding electrons on the hetero atom. the electron excited to the antibonding orbital that is  πˣ .

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The molecule that would have the highest vapor pressure at room

temperature is CCl₄ because of its stronger intermolecular bonds and higher boiling point.

The correct option is D.

The vapor pressure of a substance is a measure of the tendency of a substance to change to a gaseous state.

The vapor pressure of a substance increases with an increase in temperature.

Also, the stronger the bonds that are present within the molecules of the substance, the higher will be the vapor pressure.

The vapor pressure of a substance is also related to the boiling point of that substance. The higher the boiling point of a substance, the higher the vapor pressure of that substance.

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There are six types of Chemical Reactions in chemistry, they are:

Combination Reaction: One compound is created by the fusion of two or more compounds.

P + Q → PQ

Decomposition Reaction: In contrast to a combination reaction, a complex molecule disintegrates to produce others that are simpler.

PQ → P + Q

Precipitation Reaction: In contrast to a combination reaction, a complex molecule disintegrates to produce others that are simpler.

P + Soluble salt Q  → Precipitate + soluble salt R

Neutralization Reaction: Reactions between acids and bases occur. Typically, salt and water are the end result of this process.

Combustion Reaction: Carbon dioxide and water are created during a combustion event when oxygen and a substance mix. These processes are exothermic, which means that heat is produced.

Displacement Reaction: One ingredient interacts with another element in the compound in a displacement reaction.

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The molarity of the given solution was about 2.40 M.

What exactly is molarity?

The quantity of a material in a given volume of solution is measured in molarity (M). Molarity is defined as the number of moles of a solute in one litre of solution. A solution's molarity is also known as its molar concentration.

M is equal to n divided by v.

M stands for molar concentration or molarity.

n = number of moles of solute

v = solution litres

Sodium chloride salt mass = combined mass of evaporating with sodium chloride soution after heating minus mass of evaporating dish

=> 25.50g - 24.10g = 1.40g

1.40g sodium chloride salt mass

M= the number of moles of sodium chloride divided by the volume of solution

=>M = 0.023956 / 0.01

=>M = 2.40 M

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The molarity of the given solution was about 2.40 M.

What exactly is molarity?

The quantity of a material in a given volume of solution is measured in molarity (M). Molarity is defined as the number of moles of a solute in one litre of solution. A solution's molarity is also known as its molar concentration.

M is equal to n divided by v.

M stands for molar concentration or molarity.

n = number of moles of solute

v = solution litres

Sodium chloride salt mass = combined mass of evaporating with sodium chloride soution after heating minus mass of evaporating dish

=> 25.50g - 24.10g = 1.40g

1.40g sodium chloride salt mass

M= the number of moles of sodium chloride divided by the volume of solution

=>M = 0.023956 / 0.01

=>M = 2.40 M

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From the graphical representation of the analysis, it is clear that the population of E coli bacteria decreases over  time with the AgBr concentration within the polymer.

Silver bromide is an ionic compound formed by loss of one electron rom the silver metal to the bromine atom. Metallic silver and silver compounds are reported to be exhibiting anti -microbial properties.

Scientific experiments shown that silver is a potent antibacterial agent. Silver works in the cell membranes of bacterial making holes there and kill it.

From the given graph. It is clear that the addition of silver bromide has not improved the antibacterial property. The composite AgBr/43% NPVP shows higher anti-microbial property.

Silver nitrate shows higher antibacterial property than AgBr. It takes 100 -150 min to reduce the bacterial population significantly for each composites.

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The 3 things a supplier label must include is the product identifier , supplier identifier and the hazard statement.

The supplier label must include the product identifier that is the name of the product . it must include the supplier identifier that is the name of  company that sold the product. The supplier label must includes the hazard statements that is the precaution we have to take while handling the product. the hazard pictogram should be included in the supplier label. the precautionary statement is helpful to handle the product.

Thus, the product identifier , supplier identifier and the hazard statement should be included in the supplier label.

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As a result, gas's molecular weight is 44g/mol. It is the gas's (Carbon dioxide) molecular weight.

What is Molecular Weight?

The total atomic weights of the atoms in a molecule are measured by its molecular weight. To calculate stoichiometry in chemical equations and reactions, chemists employ molecular weight. M.W. or MW are two frequent abbreviations for molecular weight. Atomic mass units (amu), Daltons, or a unitless expression can be used to indicate molecular weight (Da).

The mass of the isotope carbon-12, which is given a value of 12 amu, serves as the reference point for defining both atomic weight and molecular weight. Because there are many carbon isotopes, the atomic weight of carbon is not exactly 12.

A mole of any gas at STP takes up a volume of 22.4l

at STP, a gas fills a volume of 2.24l

Calculating the quantity of moles of gas in step two

Consequently, the amount of gas in moles

= 0.1 moles

This is equivalent to carbon dioxide's molecular weight.

=44g/mol

As a result, gas's molecular weight is 44g/mol. It is the gas's (Carbon dioxide) molecular weight.

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The phenomenon of bond order and magnetism in molecules can be explained by applying molecular orbital theory. This theory can help explain why molecules with a higher bond order tend to be more stable, as well as why some molecules possess magnetic properties.

Molecular orbital theory provides an explanation for phenomena which are not explained by Lewis structures. Bond order and magnetism in molecules can be explained by applying molecular orbital theory. This theory helps to explain why molecules with higher bond orders tend to be more stable and why some molecules possess magnetic properties. The molecular orbital theory states that electrons in a molecule occupy a set of orbitals, which are derived from the atomic orbitals.

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Answer:

0.985

Explanation:

moles= mass/Mr

Mr is the molecular mass

Cu=63.5

F2=38

Mr=63.5+38=101.5

moles=100/101.5=0.985

round answer if needed

The repeating units in an alternating copolymer is known to have a number- average molecular weight of 100,000 g/mol is styrene.

If the other is Styrene, an alternating copolymer repeat unit forms. The formula to determine m is:

m = Mn / Dp

Styrene and unknown repetition units are the chain fractions of the alternating copolymer with the formula m = 100,000 / 2210 = 45.25g/mol.

Organic substance styrene has the chemical formula C6H5CH=CH2. This benzene derivative is an oily, colorless liquid, though older samples sometimes have a yellowish tint. The substance is easily vaporized and has a sweet smell, albeit it smells less good at higher concentrations.

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P+n=c+1 is the Gibbs phase rule. n is the number of thermodynamic degrees of freedom (F) in the system.

It describes the relationship between the number of phases p and components c in a specific alloy under equilibrium circumstances at constant pressure.

P = 1 for pure water in a single phase. S is 1 and r is 0 if we treat the water as a single species, H2O. F of liquid water equals 2+1+0-1 = 3 (F=2+s-r-P).

For CO2, s=4, r=2, and P=2, F =2+4-2-2 = 2 is the result.

For a gas phase and a liquid phase that are both uniformly mixed with ammonia and water F = 6

S=0 r=1 P=1 F = 2 for a uniform and gaseous combination of n2 and o2.

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The obtained percentage composition of acetic acid would be inaccurate and higher as greater volume of NaOH was being used in the experiment.

When a significant color change is seen, that marks the titration's endpoint (longer than 30 seconds). An excessive amount of titrant can cause the endpoint to be exceeded.

It would be an excess and the color of the solution in the flask would get significantly darker if a little bit more NaOH solution was added. Care must be made to avoid overshooting the terminus because it emerges unexpectedly. A last volume is taken from the buret after the titration has reached its endpoint.

Too much NaOH has been added if you exceed the endpoint and the solution turns bright pink. Add one or two drops of HCl to back-titrate the color to a lighter pink. The volumes consumed should be recorded.

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Answer:6.023*10²³ / 2*10²⁵

To find the mass of a one mole of a specific molecule, add the atomic masses of each of its component atoms.\

The molar mass of the unknown gas is 555.6 g/mol that can be calculated using Grahams' las of effusion.

The molar mass of gas 1= M1

The molar mass of gas 2= M2

As per Graham's law of effusion,

Rate1/Rate2= (M2/M1)1/2

Here, rate 1 is the rate of effusion of the first for the first gas and rate 2 is the rate of effusion for the second gas.

Substituting the given values,

Rate 1= 1.0 L/30 s

Rate 2= 1.0 L/125 s

Then,

[1/30]/[1/125]=(M2/32.0 g/mol)1/2

M2=555.6 g/mol

Therefore, the molar mass of the unknown gas is 555.6 g/mol.

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