Common sources of the pollutant are factories. The control techniques for each of the six pollutants.
People can be exposed to dangerous air pollutant that pose health risks in a variety of ways, including ingesting contaminated air. consuming contaminated foods, such as tainted meat, milk, or eggs, contaminated produce grown in polluted soil where air toxics have been deposited, and infected fruits and vegetables. contaminated water from dangerous air pollution, Consuming poisonous soil. Young children are especially vulnerable since they regularly put objects in their mouths or absorb soil from their hands. Exposing your skin to contaminated dirt, dust, or water (for example, during recreational use of contaminated water bodies). The two primary categories of pollution sources are point sources and nonpoint sources. Point sources—small, distinguishable sources of pollution—include factories, mines, power plants, refineries, and wastewater treatment facilities. Nonpoint sources are those that are distributed over a wide geographic area, such a watershed. Nonpoint sources can also include mobility sources like cars, buses, and trains. While each of these are single point sources, their total effects are spread across a vast area because they are all moving.
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Given the thermochemical equation, calculate the heat evolved when 74. 6 g of sulfur dioxide (molar mass = 64. 07 g/mol) is converted to sulfur dioxide.
The heat evolved for sulfur dioxide to convert to sulfur trioxide is - 115.39 kJ. The answer is C.
See the attachment for the full question. First, we calculate the number of moles of sulfur dioxide (SO₂)
Mass = m = 74.6 g Molar mass = 64.07 g/moln = m ÷ molar massFrom the thermochemical equation, we know that to convert 1 mol of sulfur dioxide needs - 99.1 kJ.
The heat that is needed = number of moles × - 99.1 kJ
= 1.164 mol × - 99.1 kJ/mol
= - 115.387 kJ
≈ - 115.39 kJ
C
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which would be more moles- 414.64 grams of iron (3) nitrate or 6.4 x1023 atoms of Mg(OH)2
Simply divide the sample's weight by its molecular weight to determine its mole count. The remainder is equivalent to the quantity of moles. Example: What number of moles are there in 300 grams of sodium bicarbonate? 84 grams per mole is the molecular weight of sodium bicarbonate.
What is the sum in moles of 6.02 x10 23 atoms?As a result, the mass of one mole of water is 18.02 g, or 6.022 x 10 23 molecules.
How many moles is iron nitrate made of?There are 3 nitrate particles in a single equation unit of iron(III) nitrate. One mole of iron(III) nitrate contains three moles of nitrate ions.
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Calculate the mass of 2×10^25 molecules of water
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.\
What are 3 things a supplier label must include?
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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in the laboratory, a student dilutes 10.8 ml of a 6.60 m hydrobromic acid solution to a total volume of 250.0 ml. what is the concentration of the diluted solutio
The concentration of the diluted solution will be 0.017 M
It asks you to find the concentration, which is the safe to assume that the unit is Molarity (M). Also, the unit was used in the problem as well.
Molarity has the units of moles/L so we have to work on getting to this point.
The problem states that you have the 10.8 mL of a 6.60 M concentration. First, we will need moles. To get the moles, we use stoichiometry,
10.8 mL = 0.0108 L
0.00108 L x ( 6.6 moles/ L) = 0.07128 moles
0.00108 L x ( 6.6 moles/ L) = 0.07128 moles
This is how many moles are present inside the solution.
To find the new concentration, we divide the total number of moles by the new volume in the Liters:
0.07128 moles/0.25L = 0.01782 M
Rounding to two significant figures, we get 0.017 M.
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Calculate the molar mass of the unknown gas. (remember that the faster the rate of effusion, the shorter the time required for effusion of 1. 0 l ; that is, rate and time are inversely proportional. ).
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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aluminum hydroxide reacts with nitric acid to form aluminum nitrate and water. what mass of water can be formed by the reaction of 15.0 g of aluminum hydroxide with excess nitric acid? a) 1.15 gb) 3.46 g c) 45.0 g d) 6.14 g e) 10.4 g
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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which phenomenon that goes unexplained by lewis structures is solved by applying molecular orbital theory?
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.
Exploring the Benefits of Molecular Orbital Theory for Understanding Chemical BondingMolecular 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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List the 2 factors mentioned in 11.1 that determine an objects thermal energy.
Answer:
The thermal energy of matter depends on how fast its particles are moving on average, which is measured by temperature, and also on how many particles there are, which is measured by mass.
What are the four transition effects?
The four electronic transition effects is :
σ - σˣ transitionn - σˣ transitionπ - πˣ transition n - πˣ transition1) 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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how to balance this chemical equation _____ Ca + _____ H2O --> _____ Ca(OH)2 + ____ H2
convert 0.098 mol RaBr2 to grams
a 4.4 g sample of gas occupies 2.24 l of volume at stp. without thinking too hard, what is the mw of the gas, and name two gases that would have this mw. write out your logic.
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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Is volume always 22.4 at STP?
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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pressure has little effect on the solubility of liquids and solids because they are almost incompressible. True or False
It is a true statement that; pressure has little effect on the solubility of liquids and solids because they are almost incompressible.
What is compressibility?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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.how many moles are in 100.0g of CuF2
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
calculate the molality of a 15.0% by mass solution of mgcl2 in h2o. the density of this solution is 1.127 g/ml.
The molality of a 15.0% by mass solution of mgcl2 in h2o is 1.86 m.
Define molality.
The molality of a solution is defined as the number of moles of solute particles present in one kilogram of a solvent. In general, the molality expresses the concentration of a solution. In this case, water acts both as a solute and a solvent.
Given:
Mass solution of MgCl₂ in H₂O= 15%
Density= 1.127g/mL
To find:
Molality=?
Let's solve this question step by step:
Step 1: Calculate the mass of solute and solvent in 100 grams of solution
As it is given that 15.0% by mass solution of MgCl₂ (solute) in H₂O (water).
In 100 g of solution, there are 15.0 g of solute and 100.0 g - 15.0 g = 85.0 g of solvent.
Step 2: Calculate the moles corresponding to 15.0 g of MgCl₂
The molar mass of MgCl₂ is 95.21 g/mol.
Number of moles is given mass divided by the molar mass.
Number of moles= 15g/95.21 g/mol
=0.158 mol
Step 3: Convert the mass of water to kilograms.
As we know, 1 kg = 1,000 g.
=85/1000= 0.085 kg
Step 4: Calculate the molality of the solution.
Molality is a measure of the number of moles of solute in a solution corresponding to 1 kg or 1000 g of solvent.
Molality= 0.158 mol/0.085 kg
= 1.86 m.
Therefore, the molality of a 15.0% by mass solution of mgcl2 in h2o is 1.86 m.
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100 POINTS HELP WILL GIVE BRAINLIEST
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).
problem 4.18 an alternating copolymer is known to have a number-average molecular weight of 100,000 g/mol and a degree of polymerization of 2210. if one of the repeat units is ethylene, which of styrene, propylene, tetrafluoroethylene, and vinyl chloride is the other repeat unit? why?
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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HELPPPPPPPPPPPPPPPPP please ily
Data Analysis LAB
1. Interpret Does the addition of silver bromide (AgBr) ions to NPVP improve the antimicrobial properties of the composite?
2. Interpret Which composite reduced the E. coli population to zero? How long does it take for each substance to reduce the bacteria population to zero?
3. Conclude Does a composite polymer containing NPVP and silver bromide show antimicro bial properties? Explain your answer.
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.
What is silver bromide?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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Consider 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.
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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how many molecules are in 9.4 moles of ibuprofen?
The number of molecules in 9.4 moles of ibuprofen is equal to 5.66 × 10²⁴.
What is a mole?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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If the mercury in a barometer raises 15. 5 centimeters due to a change in ambient pressure, what is the corresponding change in pressure in atm?.
The corresponding change in pressure in 0.2026 atm.
A change in pressure is a change in the amount of force applied to an area over a given surface. Pressure is measured in units called pascals (Pa). An increase in pressure occurs when more force is applied to the same area, or when the same amount of force is applied to a smaller area.
A decrease in pressure occurs when less force is applied to the same area, or when the same amount of force is applied to a larger area.
Convert 15.5 centimeters to millimeters (1 cm = 10 mm).
15.5 cm = 155 mm
Use the formula: Pressure (in atm) = (Height in mm) / 760.
Pressure = (155 mm) / 760
Pressure = 0.2026 atm
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which phenomenon that goes unexplained by lewis structures is solved by applying molecular orbital theory?
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.
Exploring Bond Order and Magnetism in Molecules Using Molecular Orbital TheoryMolecular 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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based on its position in the periodic table, which atom would you predict to form an ionic compound with two bromine atoms?
The , calcium is on forming two bonds with two bromine atoms because it is a IIA group element.
What is periodic table?
All identified chemical elements are arranged in rows (referred to as periods) and columns (referred to as groups) according to increasing atomic number in the periodic table of chemical elements, also known as the periodic table.
What is bond?
In molecules, atoms are joined by chemical bonds. Atomic nuclei with positive charges interact with electrons with negative charges to form bonds (the positions of which in space are determined by quantum mechanics).
when an element reacts with two bromine atoms means ita valency is two.,i,e a metal can form two bonds.
So calcium is on forming two bonds with two bromine atoms because it is a IIA group element.
Na and Li are the IA group elements.so these two elements forming only one bond . i,e these are reacts with one bromine .
Al is 13th group element so it forms three bonds.
Carbon is a non-metal. it does not form ionic bond.
Therefore, calcium is on forming two bonds with two bromine atoms because it is a IIA group element.
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a mixture of gases contains 0.310 mol ch4, 0.270 mol c2h6, and 0.300 mol c3h8. the total pressure is 1.30 atm. calculate the partial pressures of the gases.
The partial pressure of a mixture of gases contains 0.310mol ch4, 0.270mol c2h6, and 0.300 c3h8 with total pressure 1.30atm are 0.476atm (for CH4), 0.390atm (for C2H6), 0.433atm (for C3H8).
What is partial pressure?In a mixture of gases, each constituent gas has a partial pressure of that constituent gas as if it alone occupied the entire volume of the original mixture at the same temperature.
Now, let's calculate the partial pressure for each gas.
Given from the question
0.310 mol CH4
0.270 mol C2H6
0.300 mol C3H8
The total pressure is 1.30 atm
Partial pressure = mole fraction * total pressure
Total moles of gas = 0.310 + 0.270 + 0.300 = 0.88 moles
Partial pressure of CH4
= (CH4 mol / total moles) * total pressure
= (0.310 / 0.88) * 1.3
= 0.458atm (rounded)
Partial pressure of C2H6
= (C2H6 mol / total moles) * total pressure
= (0.270 / 0.88) * 1.3
= 0.399atm (rounded)
Partial pressure of C3H8
= (C3H8 mol / total moles) * total pressure
= (0.300 / 0.88) * 1.3
= 0.443atm (rounded)
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What are the three phases of the transition process?
The three phases of transition process are melting, freezing and evaporation.
In a phase transition process, matter changes from one phase to another. The three phases of transition process are discussed below:
Melting: The change of state from solid to liquid is known as melting. The process by which ice changes into water is known as melting.
Freezing: The change of state of matter from liquid to solid state is known as freezing. The process of conversion of liquid water into ice is an example of freezing.
Evaporation: The change of state of matter from liquid to gaseous state is known as evaporation. The vapours released as a result of boiling of water is an example of evaporation.
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45 g of CAC L2 are dissolved in enough water for the molarity of a solution is 1. 5 a.m. what is the volume of milliliters of the solution
The concentration terms are molality, normality and mole fraction. Molarity can be used to find out the ionic strength of any solution. Therefore, the volume in milliliters of solution is 260ml.
What is molarity?Molarity can be calculated by dividing number of moles of solute by volume of solution in liter. Molarity is affected by temperature. Its unit is mole/liter. It measure the concentration of any solute in a solution.
Mathematically,
Molarity= number of moles of solute/volume of solution in litre (1)
Where,
moles= given weight /by molecular weight
=45 g ÷110.98 g/mol
=0.40 moles
Molarity= 1. 5M
Substituting values in equation 1
1. 5=0.40/volume
Volume = 0.26L=260ml
Therefore, the volume in milliliters of solution is 260ml.
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Why does the trend for atomic radius decrease across a period?
The trend for atomic radius decrease across a period because the number of shells will remains the same but number of electrons increases in the shell so, the effective nuclear charge increases and size decreases.
The atomic radius decreases when we move from left to right in the periodic table this is because of the reason that the number of shells remains the same across the period and the only the number of electrons will increases so. that the effective nuclear charge increases increase. the nucleus will strongly attract the electrons .
Thus, because of number of shells will remains the same but number of electrons increases in the shell so, the effective nuclear charge increases and size decreases.
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a 0.85 mol sample of a gas at 27 oc is in a rigid container with a volume of 1.65 l. what is the pressure of the gas in atm?
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?
The ideal gas law, also known as the general gas equation, is the equation of state for an academic ideal gas.Although the ideal gas law has some limitations, it's an approximation of numerous feasts under numerous conditions. Benoit Paul Émile Clapeyron formulated the ideal gas law in 1834 as a combination of Charles' empirical law, Boyle's law, Avogadro's law, and Gay- Lussac's law. The ideal gas law states that the product of the pressure and the volume of one gram patch of an ideal gas is equal to the product of the absolute temperature of the gas.To know more about the ideal gas law, click the link given below:
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