Answer:
About 94
Explanation:
(1× 5.67×10²⁵)/6.03×10²³
94.03 moles of Carbon
About 94
How many formula units of NaCl are there in a 10. 95 mole sample of sodium chloride
Answer: 6.59 x 10^24 formula units
Explanation: Formula units are another word for atoms, meaning we use Avogadro's number (6.022x10^23 atoms per mole), we multiply 10.95 by Avogadro's number to get the answer
Draw the structure or structures produced by the catalytic reduction of the given compound, in which h2 is in excess. Draw hydrogen at a chirality center and use wedge‑and‑dash bonds to designate the stereochemistry, if applicable.
Structures produced by the catalytic reduction of the given compound, in which H₂ is in excess are attached as a picture.
Upon the catalytic reduction of the given compound 1-ethylcyclohexa-1,4-diene (missing in question) by using excess hydrogen, two compounds (1R,2S)-1-ethyl-2-methylcyclohexane and (1S,2R)-1-ethyl-2-methylcyclohexane results. One compound has R,S configuration and the other has S,R configuration. By using the CIP rules priorities are given to the groups attached to the chiral carbon. CIP rules are based on the atomic masses of the groups attached so the minimum number is given to the group having the highest atomic mass. As it is a mixture of two enantiomers so we can call it a recemic mixture.
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what should the mole percent of oxygen be in the diving gas for the partial pressure of oxygen in the mixture to be 0.21 atm , the same as in air at 1 atm ?
the mole percent of oxygen be in the diving gas for the partial pressure of oxygen in the mixture to be 0.21 atm , the same as in air at 1 atm is 2.52%
Atm 8.32 is the total pressure.
0.21 atm is the partial pressure of oxygen gas.
The relationship between partial pressure, total pressure, and mole fraction is depicted here.
partial oxygen pressure Total pressure x Mole percent of oxygen -
Calculate the gas's mole fraction of oxygen.
0.21 atm 8.32 x Mole fraction
Mole fraction = 0.21/8.32 = 0.0252
As illustrated below, determine the mole percent of the gas. Mole percent is equal to the mole fraction divided by 100, which is 0.0252 times 100 and 2.52% respectively.
As a result, oxygen's mole percent is 2.52%.
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For mn3 , write an equation that shows how the cation acts as an acid.
Equation showing the Mn³⁺ cation acting as an acid:
Mn³⁺+ H₂O → MnOH²⁺ + H⁺
A cation is a positively charged ion in a metal element whose formation is carried out by releasing one or more electrons from its outermost electrons to achieve stability.
The intermediate reaction is an acid-base reaction. Acid-base reactions generally produce salt and water. However, in this reaction what is formed is an anion and a conjugate acid-base cation because it uses the Bronsted-Lowry acid-base principle. Mn³⁺ acts as an acid so that it donates a proton MnOH²⁺ to H⁺ so that the species formed are MnOH²⁺ and H⁺.
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What is the outer part (B) of an atom called?
Answer:
B is the outer part atom .
The outermost regions of the atom are called electron shells and contain the electrons (negatively charged). The atoms have different properties based on the arrangement and number of their basic particles.SO the hydrogen atom (H) contains only one proton, one electron, and no neutrons
Explanation:
What compound is formed from Ca2+ and Cl1-
Answer:
You get CaCl2 (Calcium chloride)
Explanation:
Calcium has a +2 charge and chlorine has a -1 charge. You need the net ionic charge to equal zero so you need two chlorine atoms to have the +2 cancel out. You end up with CaCl2.
the species oxidized shows a(n) the species oxidized shows a(n) drop zone empty. the species reduced shows a(n) the species reduced shows a(n) drop zone empty. the species that shows a decrease in oxidation number is the the species that shows a decrease in oxidation number is the drop zone empty. the species that shows an increase in oxidation number is the the species that shows an increase in oxidation number is the drop zone empty. reducing agent. decrease in oxidation number. oxidizing agent.
1) The species oxidized shows a(n) = increase in oxidation number.
2) The species reduced shows a(n) = decrease in oxidation number.
3) The species that shows a decrease in oxidation number is the = oxidizing agent.
4) The species that shows an increase in oxidation number is the = reducing agent.
What do you mean by oxidation and reduction?The degree of biological activity controls both the formation of zones where specific redox processes predominate and the progression of environmental redox reactions. Anoxia, which are situations when the concentration of dissolved molecular oxygen is extremely low, is a requirement but not a sufficient condition for lowering conditions. The active microbial population shifts from communities that depend on aerobic respiration, in which molecular oxygen serves as the terminal electron acceptor, to anaerobic respiration, in which other chemical substances take the place of molecular oxygen as the terminal electron acceptor supporting respiration, as a result of the development of anoxia.
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what is the energy (in joules) of the photon emitted when the electron of a he cation relaxes from the 3s orbital to the 2s orbital? enter the numerical answer only; do not enter a unit.
the energy emitted by photon was 0.300564×10-18 J
what is photon?
The term photon, which means "light" in Ancient Greek, refers to a basic particle that is a quantum of the electromagnetic field, which includes electromagnetic radiation like light and radio waves. It also serves as the force carrier for the electromagnetic force. Considering that photons have no mass, they always travel at the speed of light in a vacuum, which is 299792458 m/s (or 186,282 mi/s).
formula was
ΔE=R(1n2f−1n2i)
R=the Rydberg constant, 2.178×10-18 J
For a transition from n=3 to n=2, we get
ΔE=2.178×10-18 J(1/22−1/32)
=2.178×10-18 J(1/4−1/9)
=2.178×10-18 J× 9 – 4/9×4
=2.178×10-18 J× 5/36
=0.300564×10-18 J
hence the energy emitted by the photon was 0.00564x10-18J
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describe the bohr model for the atom and explain how it accounted for the emission spectra of atoms.
The Bohr model for the atom explains how electrons chenges different energy levels and accounted for the emission spectra of atoms.
The Bohr model postulates that electrons orbit the nucleus at constant electricity ranges. Orbits in addition to the nucleus exist at better electricity degrees. While electrons go back to a decreased strength level, they emit energy in the shape of light.
Bohr's model shows that the atomic spectra of atoms are produced via electrons gaining energy from a few supplies, leaping as much as a better electricity degree, then without delay losing returning to a lower strength stage and emitting the strength difference among the 2 power ranges.
Bohr explained the steadiness of atoms by using presenting that electrons revolve across the nucleus inside the exact circular paths having fixed strength and while transferring in the same orbit they do now not lose or benefit from strength.
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13. Identify two elements on Mendeleev's table that combines with oxygen in the same ratio
as magnesium.
14. Identify one characteristic used by Mendeleev to develop his classification system of
the elements.
15. State one difference between Mendeleev's Table and the Modern Periodic Table.
Two elements on Mendeleev's table that combines with oxygen in the same ratio as magnesium are Beryllium and Calcium.
They form in a ratio of 1:1 with oxygen.
What is the reason behind Berylium and Calcium in the ratio of 1:1 with oxygen?
The one-to-one charge ratio results in the formula CaO. Calcium and Oxygen have iconic bonding because calcium loses two electrons and oxygen gains two to complete their octet.
BeO can be produced by the reaction between beryllium and oxygen .In this reaction , each Be atom loses its two valence electrons to 0 atoms , forming Be2+ions and O2- ions. The electrostatic attraction between the oppositely charged ions forms the iconic bond .
One characteristic used by Mendeleev to develop his classification system of the elements:
Mendeleev was directed by two variables: Expanding nuclear masses, and Gathering of components having comparative properties. Mendeleev thought about formulae of hydrides and oxides as one of the fundamental models for order, among substance properties.
One difference between Mendeleev's Table and the Modern Periodic Table is :
Mendeleev's periodic table is based on atomic mass whereas +The modern periodic table is based on the atomic number.
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what molecule is the final electron acceptor after the electron has moved through the electron transport chain?
Oxygen is the final electron acceptor after the electron has moved through the electron transport chain.
In the electron transport chain, electrons are moved from protein to protein. The transport chain's succeeding proteins can each take an electron with a lower energy. Energy is released as electrons go from a high-energy state to a low-energy state. Protons are pumped across the membrane using this energy to create a gradient.
Oxygen serves as the ultimate electron acceptor (O2). Since oxygen has a strong affinity for electrons and a high electronegativity.
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After passing through the cycle of electron transport, oxygen serves as the last electron acceptor.
From protein to protein, electrons are transferred along the electron transport chain. The proteins that follow in the transport chain can each accept an electron with a lower energy. Electrons move from a high-energy state to a low-energy state, releasing energy in the process. This energy is used to drive protons across the membrane, producing a gradient. As the ultimate electron acceptor, oxygen (O2). A high electronegativity and significant attraction for electrons are seen in oxygen.
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in the tlc experiment silica gel is used as a solid phase to differentiates between what kind of compounds?
Silica gel and alumina are the most often utilized adsorbents. A wide range of chemicals, including hydrocarbons, alcohols, ketones, esters, acids, azo compounds, and amines, are separated using silica gel.
Because of its outstanding separation capabilities, the Silica Gel G for Thin Layer Chromatography as binder is most commonly employed as an adsorbent in thin-layer chromatography.
What is Silica Gel?Silica gel is a porous and amorphous type of silicon dioxide composed of an uneven tridimensional structure of alternating silicon and oxygen atoms with nanometer-scale holes and pores. The spaces might be filled with water or other liquids, or they could be filled with gas or a vacuum.
Silica gel is a desiccant, which means it is a drying agent. Its purpose is to absorb moisture and condensation from its surroundings. It is a very efficient and cost-effective method for businesses to keep their items fresh and dry for consumers during storage and shipping procedures.
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a ground-state h atom absorbs a photon of wavelength 93.78 nm, and its electron attains a higher energy level. the atom then emits two photons: one of wavelength 2626 nm to reach an intermediate level, and a second to reach the ground state. what was the wavelength of the second photon emitted?
Wavelength of the second photon emitted is 97.3nm. By using the formula E = hc/λ.
What is hydrogen energy level?A photon's frequency and Planck's constant are used to calculate the quantum energy. The relationship between wavelength and frequency is inverse, as seen below.
v = c/ λ
The energy of photon of light: given by the formula,
E = hv
E = hc/λ
Given,
wavelength of photon of light at higher energy level is 93.78 nm.
wavelength of photon of light at intermediate level is 2626 nm = 2626×10⁻⁹m
Etotal = hc/λ
Where,
E is the energy of a photon.
h is the Planck's constant (6.626×10⁻³⁴J⋅s)
c is the speed of light (3.0×10⁸m/s)
λ is the wavelength, wavelength is 93.78 nm.
1nm = 1×10⁻⁹m
Therefore, conversion of 93.78 nm into m is, 93.78nm=93.78×10⁻⁹m
Substitute:
Etotal = [tex]\frac{(6.626 . 10^{-34} )(3.0 . 10^{8}) }{93.78 .10^{-9} }[/tex]
Etotal = 2.12 × 10⁻¹⁸ J
the energy of 1 photon, E1 = [tex]\frac{(6.626 . 10^{-34} )(3.0 . 10^{8}) }{2626 .10^{-9} }[/tex]
E1= 7.57×10⁻²⁰
the energy of 2 photon, E2 = Etotal-E1
E2 = 2.044× 10⁻¹⁸J
wavelength of second photon,
λ = hc/E2
λ = [tex]\frac{(6.626 . 10^{-34} )(3.0 . 10^{8}) }{2.04 .10^{-18} }[/tex]
λ = 9.73 × 10⁻⁸m
conversion of m into nm, 1m = 1×10⁹nm
Therefore, conversion of 9.73×10⁻⁸m into nm is
9.73×10⁻⁸m = 9.73×10⁻⁸×10⁹nm =97.3nm
∴ wavelength of second emitted photon is 97.3nm.
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Replace this sample text with the prompt or directions for this item.
The atomic number of an element is the number of
The atomic mass is the number of
The electrons in the outermost shell are known as the
protons protons and neutrons
valence electrons
Answer:
1. Protons
2. Protons and Neutrons
3. Valence electrons
Explanation:
fermentation products can include commonly known compounds such as lactic acid and ethanol, but many other products like butanol, acetic acid, and succinic acid are also possible because
Fermentation products can include commonly known compounds such as lactic acid and ethanol, but many other products like butanol, acetic acid, and succinic acid are also possible because, these products arise to complete catabolism of glucose and regenerate NAD+ from NADH.
What is Fermentation?
It is an anaerobic process in which energy can be released from glucose even if oxygen is not available.”
The main purpose of fermentation process is not producing energy but to regenerate the NAD+ from NADH. The NAD+ thus produced are utilised in oxidation of glucose. The NAD+ is reduced to NADH and is used in various stages of glucose oxidation (glycolysis, Krebs cycle, oxidative phosphorylation). Thus production of NAD+ along with butanol, acetic acid, succinct acid helps in continuing the glucose oxidation without interruption of shortage of oxidising agent (NAD+)Learn more about fermentation - Brainly.com https://brainly.com/question/11554005
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18 in scientific notation
Move the decimal so there is a non-zero digit to the left of the decimal point. The number of decimals you move will be the exhibitor on the 1010. If the decimal has been moved to the right, the exponent will be negative. If the decimal has been moved to the left, the exponent will be positive.
[tex]1.8 \times 10 { }^{1} [/tex]
Does alcohol really burn off when cooking? what are the possible substitutions for alcohol in recipes?.
Yes, alcohol burns off when cooking. To make sure that alcohol cooks out completely, you need to cook the food longer. The possible situation for alcohol in recipes is fermentation.
Foods undergo fermentation process for saving and storing them for longer periods through preservation.
In general, alcohol is used during fermentation process to increase their storage time.
During fermentation, food is cooked for about 15 minutes. That is why most foods contain almost 40 percent of alcohol in them.
In order to remove alcohol, it is necessary to cook food longer. The longer you cook, the more alcohol cooks out.
However, to remove all traces of alcohol, make sure to cook food for about three hours.
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when you go from left to right more protons are added to the atom. why would that make it get smaller when more particles are added
The atom get smaller when more particles are added as forces of attraction between protons and electrons increase.
The attraction between the nucleus and shell grows as we add additional protons and electrons, which causes the shell to shrink. The atom shrinks as a result. Your final and first-to-last paragraphs are attempting to mimic the behavior of electrons; the first cannot increase and should remain the same, while the second is contracting.
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Sold substance a has a melting point at 100c. liquid substance b has a freezing point at 110c. for each substance, identify its state of matter and describe the motion of its particles when the substance is at 115c.
Substance A is a solid at 115° Celsius. Its particles are not moving while Substance B is a liquid at 115° degrees Celsius. Its particles are moving around freely.
Solid particles in substance A are not moving because they are held together by strong intermolecular forces. Liquid particles in substance B are moving around freely because they are not held together by strong intermolecular forces.
Intermolecular forces are the forces that hold molecules together. These forces are much weaker than the covalent or ionic bonds that hold atoms together in a molecule, but they are strong enough to keep molecules from flying apart. The four main types of intermolecular forces are dipole-dipole forces, London dispersion forces, hydrogen bonding, and ion-dipole forces.
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Diana measured 233 mL for the volume of the object. The actual volume of the object was 241 mL. What is the percent error of Diana’s results?
Answer:
3.32%
Explanation:
To calculate the percent error, you need to use the following equation:
| measured value - actual value |
Percent Error = -------------------------------------------------- x 100%
actual value
In this equation, the measured value is the amount generated after running an experiment. The actual value is the amount generated solely through calculations.
Measured Value = 233 mL
Actual Value = 241 mL
| 233 mL - 241 mL |
Percent Error = -------------------------------- x 100%
241 mL
8 mL
Percent Error = ----------------- x 100%
241 mL
Percent Error = 0.0332 x 100% = 3.32%
The incomplete table below shows selected characteristics of gas laws.
Name
Variables
Constants
Equation
?
?
PV = k
Charles's law
?
V= kT
?
Temperature, pressure
?
P= kT
Combined gas law
Pressure, temperature, volume
?
?
Which constants would most likely be filled in the first row of the table?
O temperature and moles of gas
• volume and temperature
pressure and volume
O pressure and moles of gas
The complete table shows characteristics of gas law :
Variables constant Equation
Boyles law pressure , volume Temperature PV = k
Charles law volume ,temperature pressure V = kT
Gaylussac law pressure, temperature volume P = kT
combined pressure, temperature no. of moles PV = kT
gas law volume
1) The Boyles law states that : The pressure of the gas is inversely proportional to volume of gas.
P ∝ 1/V
PV = k
k is constant
2) The Charles law `states that at constant pressure the volume is directly proportional to temperature of gas.
V ∝ T
V = kT
3) The gay - lussac law states that at constant volume pressure is directly proportional to temperature.
P ∝ T
P = kT
4) The combined gas law is the combination of temperature , pressure and volume .
PV = kT
Thus, The complete table shows characteristics of gas law :
Variables constant Equation
Boyles law pressure , volume Temperature PV = k
Charles law volume ,temperature pressure V = kT
Gaylussac law pressure, temperature volume P = kT
combined pressure, temperature no. of moles PV = kT
gas law volume
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Answer:
The answer is A: temperature and moles of gas
Edge 2023
mass of methane will occupy the same volume as 0.0325 mol 0.0325 mol of propane at 1.00 atm 1.00 atm and 298 k?
5.18 grams of methane will occupy same volume as 0.0325 moles of propane.
The ideal gas equation says,
PV = nRT
Where,
P is pressure, V is volume, n is moles, R is gas constant, T is temperature.
Moles of propane is 0.0325 moles.
volume of propane at 1 atm and 298 K is,
V = nRT/P
V = 0.0325 x 0.082 x 298/1
V = 7.92 L
Volume of propane is 7.92 L.
we know, moles = mass/molar mass.
Molar mass of Methane is 16g/mol.
Moles of methane = mass/16
Volume of methane,
V = nRT/P
7.92 = mass x 0.082 x 298/16
Mass = 5.18grams.
So, 5.18 grams of methane will have same volume as that of 0.0325 moles of propane.
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potassium sulfate and calcium chloride
Express your answer as a chemical equation. Identify all of the phases in your answer. Enter NOREACTION if no reaction occurs.
Potassium sulfate and Calcium chloride reacts with each other to form Potassium chloride and Calcium sulphate. The chemical yield in this process is about 99%.
The balanced chemical reaction for the reaction of Potassium sulfate and Calcium chloride is given as:
CaCl₂ + K₂SO₄ → CaSO₄ + 2KCl
The reaction between Potassium sulfate and Calcium chloride is a double displacement type of reaction.
Double displacement reaction is a type of reaction where one part of the reactant is replaced by the another part of the reactant.
The general form of double displacement reaction is written as:
AB + CD → AD + BC
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what is the concentration of ammonia ( n h 3 ) in solution if 24.60 ml of 0.1080 m hcl is needed to titrate a 250 ml sample of the ammonia solution to the end point?
According to the given statement A solution's ammonia concentration will be 0.0106 M.
What is concentration in chemistry?The amount of solute contained in a specific solution volume is the substance's concentrations. The molarity of solute for 1 L of solution, or molarity, is used to express quantities.
Briefing:NH₄OH(aq) + HCl (aq)⇒ NH4Cl(aq) + H2O (l)
According to the neutralization law,
n[tex]_1[/tex]M[tex]_1[/tex]V[tex]_1[/tex] = n[tex]_2[/tex]M[tex]_2[/tex]V[tex]_2[/tex]
where,
M[tex]_1[/tex] = molarity of HCl solution = 0.1080 M
V[tex]_1[/tex] = volume of HCl solution = 24.60 ml
M[tex]_2[/tex] = molarity of NH₄OHsolution = ?
V[tex]_2[/tex] = volume of NH₄OH solution = 250.0 ml
n[tex]_1[/tex] = valency of HCl = 1
n[tex]_2[/tex] = valency of NH₄OH= 1
1 * 0.1080 M * 24.60 = 1 * M2 * 250.0
M2 = 0.0106
As a result, a solution's ammonia concentration will be 0.0106 M.
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a main-group element has an outer electron configuration of ns2np3 . what charge is likely for an ion of this element?
The charge for an ion of an element that has an outer electron configuration of ns2np3 is -3.
To be in a stable state, electrons try to make a noble gas configuration. The noble gas configuration is ns2 or ns2np6. So electrons try to gain or lose electrons to become ions. Ions have a charge according to the number of electrons captured (negative charge) or released (positive charge). The charge for an ion with the electron configuration
ns1 is +1ns2 is +2ns2np1 is +3ns2np2 is +4ns2np3 is -3.ns2np4 is -2.ns2np5 is -1.Ions with a negative charge are anions while ions with a positive charge are cations.
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thin-layer chromatography was performed and four spots were visualized on the glass slide. the substance with which rf value was least soluble in the stationary phase?
The spot with the lowest Rf value would be the most polar one and, thus, the one that is least soluble in the stationary phase.
Does more polarity indicate a higher or lower Rf value?
Calculating the Rf value is possible if you can see the spots. The identity and properties of the various compounds can be established using the Rf values. Since more polar compounds have a stronger affinity for the polar solid phase, they will have smaller Rf values.Rf values are typically higher for low polarity chemicals compared to higher polarity ones. Generally speaking, as polarity of a compound increases, so does its adsorptivity (i.e. the more polar the compound then the stronger it binds to the adsorbent).To learn more about Rf values, follow the link https://brainly.com/question/14393432
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the molecular art depicts the following reversible reaction at equilibrium: co( g) cl2( g) image cocl2( g). what can be inferred about the equilibrium constant, k, for this reaction?
The molecular art depicts the following reversible reaction at equilibrium: CO( g) + Cl₂ ( g) image COCl₂( g). the equilibrium constant, k, for he given reaction is above one , that means K > 1.
The chemical reaction is given as :
CO( g) + Cl₂ ( g) ⇄ COCl₂( g)
the equilibrium constant is given as :
K = [ COCl₂ ] / [ CO ] [ Cl₂ ]
here, K > 1
if the value of K is greater than 1 that means the reaction is product favored.if the value of K is less than 1 that means the reaction is reactant favored .if k = 1 , neither product nor the reactant favor.Thus, The molecular art depicts the following reversible reaction at equilibrium: CO( g) + Cl₂ ( g) image COCl₂( g). the equilibrium constant, k, for this reaction is greater than 1, K > 1.
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what mass of methane will occupy the same volume as 0.0325 mol 0.0325 mol of propane at 1.00 atm 1.00 atm and 298 k?
0.79 gram is the mass of methane that will occupy the same volume as 0.0325 mol of propane at 1.00 atm 1.00 atm and 298 k.
The atmosphere contains small amounts of the gas known as methane. The simplest hydrocarbon is methane, which only has one carbon atom and four hydrogen atoms. Strong greenhouse gas methane is. Numerous anthropogenic (influenced by humans) and natural sources release methane into the atmosphere. Landfills, natural gas and oil pipelines, industrial processes, mining for coal, stationary and mobile combustion, wastewater treatment, and certain agricultural practises are examples of anthropogenic emission sources. propane primary applications include heating homes and water, preparing and storing food, driers for clothing, and industrial and farm machinery. Propane is also used as a raw material in the chemical industry to create plastics and other compounds.
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2. A 12.2g sample of a hydrate was heated to a
constant mass of 10.2 grams. What is the
percent by mass of the water in the hydrate?
The percent by mass of the water in the hydrate is 83.6 percent.
Calculate the percent by the mass of each detail by using dividing the mass of that element by 1 mole of the compound by using the molar mass of the compound and multiplying by using one hundred%. consider your end result. the chances upload as much as a hundred%.
This system allows for displaying the bottom complete number of moles and the relative range of atoms of every detail in a compound. With the help of the empirical formulation, chemists can also calculate the actual molecular system. This component suggests the exact range of atoms within the compound.
Calculation:-
mass of hydrated sample = 12.2 gram
actual mass = 10.2
percentage mass = 10.2/12.2 × 100
= 83.6 percent.
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the molar heat of fusion of water is 6.02 kj/mol. calculate the energy required to melt 46.8 g of water.
When the molar heat of fusion of water is 6.02 kJ/mol, it takes 15.4 kJ of energy to melt 46.8 g of water. The enthalpy of a substance changes due to heat of fusion , which releases energy.
To convert a substance from a solid to a liquid while maintaining pressure, a certain amount of the substance must be used.
A thermodynamic system's enthalpy, which is one of its properties, is calculated by adding the system's internal energy to the product of its pressure and volume. It is a state heat of fusion that is employed in numerous measurements in chemical, biological, and physical systems while the pressure is constant. Called enthalpy
46g/18g equals mols of water.
mole-1 equals 2.56 mole
1 mole melts at a temperature of 6.02KJ of heat.
Heat needed to melt 2.56 moles is equal to 6.02kJ*2.56 = 15.4kJ.
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