The frequency of collisions between the two reactants increases as the concentration of the reactants increases. When collisions happen, they don't always cause a reaction (atoms misaligned or insufficient energy, etc.). Higher concentrations result in more collisions and reaction opportunities.
Increasing a reactant's surface area increases the frequency of collisions and thus the reaction rate. The surface area of several smaller particles is greater than that of a single large particle. The greater the available surface area for particles to collide, the faster the reaction will occur.
How does concentration affect the rate of collisions between reactants?Thus, we can conclude that by increasing the concentration of Mg in the reaction mixture we increase the rate of collisions between the reactants in this reaction.
What does the half reaction of an oxidation-reduction reaction show?Iron gains electrons in the half reaction of an oxidation-reduction reaction. What does iron's electron gain mean? It has been reduced. Predict the product that will precipitate out of the reaction using the solubility rules and the periodic table.
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What volume of benzaldehyde (ml) is 3 .00 mmol? the density of benzaldehyde is 1.045 g/ml.
The volume of benzaldehyde (ml) is 304.65 mL, if the density of benzaldehyde is 1.045 g/ml and having 3 mol.
Given,
Moles of benzaldehyde = 3 mol
Density of benzaldehyde = 1.045g/mol
Molar mass of benzaldehyde = 106.12 g/mol.
As we know that,
Moles can be calculated as
Moles = Given mass/ molar mass
3 = Given mass/ 106.12
Given mass = 318.36g.
The mass of benzaldehyde is 318.36g.
Now,
Density = mass/ Volume
1.045 = 318.16/ Volume
Volume = 318.36/1.045
Volume = 304.65 mL.
Thus, we find that the volume of benzaldehyde is
304.65 mL.
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Calculate the molality of a solution containing 14. 3 g of nacl in 42. 2 g of water
Answer:
5.80 M
Explanation:
In this problem, the solute is NaCl and the solvent is water. To find the molality, you need to (1) convert grams NaCl to moles NaCl (via molar mass), then (2) convert grams H₂O to kilograms H₂O, and then (3) calculate the molality (via molality equation). The final answer should have 3 sig figs to match the sig figs of the given values.
(Step 1)
Molar Mass (NaCl): 22.990 g/mol + 35.453 g/mol
Molar Mass (NaCl): 58.443 g/mol
14.3 grams NaCl 1 mole
-------------------------- x ------------------------ = 0.245 moles NaCl
58.443 grams
(Step 2)
1,000 g = 1 kg
42.2 grams H₂O 1 kg
-------------------------- x ----------------------- = 0.0422 kg H₂O
1,000 grams
(Step 3)
Molality = moles solute / mass solvent (kg)
Molality = 0.245 moles NaCl / 0.0422 kg H₂O
Molality = 5.80 M
How many moles of iron iii oxide can be prepared from 6 moles of oxygen?
Answer:
6molO2 3/2O22Fe=4,5024molFe .
Explanation:
You have to start with the balanced chemical equation. Iron is just Fe. Oxygen in nature is found as an O2 molecule.
2Fe(s)+3/2O2(g) Fe2O3(s)
If you check the balance. There are two Fe on both sides of the equation and three O on both sides, so it’s balanced.
Now use the stoichiometric ratios (the coefficients of the balanced chemical equation) to convert 6 mol of oxygen to iron.
6molO2 3/2O22Fe=4.5024molFe .
These coefficients can be used as conversion factors when it comes to substance moles.
Some of you may insist that a balanced chemical reaction must have whole numbers. This is not really necessary. The reaction I wrote above is a named type of reaction, called Fe2O3 formation. In this type of reaction, there must be a mole of product so that it requires that sometimes there are fractional numbers for the coefficients in the reagents.
But, just for the argument, let’s rebalance the equation for integer coefficients only.
4Fe(s)+3O2(g) 2Fe2O3(s)
We are now using the coefficients as conversion factors, as we have done before.
A d1 octahedral complex is found to absorb visible light, with the absorption maximum occurring at 503 nm. calculate the crystal-field splitting energy, δ , in kj/mol
237.9 KJ/mol⁻¹ crystal-field splitting energy is found to absorb visible light.
What is crystal-field splitting energy?The energy of the electron configuration in the ligand field less the energy of the electronic configuration in the isotropic field is known as the crystal field energy.
The core metal ion's d orbitals split into two groups with various energies in an octahedral complex. The energy of the electron transition, which is related to the wavelength of the emitted light, is equal to the energy of the crystal-field splitting.
Δ = E = ℎ c / λ
Where,
where ℎ is the Planck constant, 6.62*10⁻³⁴m²kg s⁻¹, and c is the speed of light, 3 x 10⁸m s⁻¹.
Δ = 6.62*10⁻³⁴m²kg s⁻¹ / 503 x 10⁻⁹
= 3.95 x 10⁻¹⁹
= 3.95 x 10⁻¹⁹
This value is the splitting energy per ion.
To convert it to J/mol, we should multiply it by Avogadro number, 6.022 x 10²³mol⁻¹
= 3.95 x 10⁻¹⁹ x 6.022 x 10²³mol⁻¹
= 237.9 KJ/mol⁻¹
Therefore, the crystal-field splitting energy is 237.9 KJ/mol⁻¹ .
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What is the ph of a solution which is 0. 025 m in weak base and 0. 039 m in the conjugate weak acid ( a = 7. 1 × 10−6)?
The pH of the solution is 4.96.
pH measures the amount of hydrogen and hydroxide ions in a solution and shows how acidic or alkaline it is.
Weak bases are the solutions to substances that do not dissociate completely in water. Conjugate acids are the product formed by the base and have a difference of one proton.
Using the base dissociation constant, Ka
pKa can be calculated as,
[tex]pKa = - log (Ka)[/tex]
[tex]= - log (7.1 * 10^-6)[/tex]
[tex]= 5.15[/tex]
0. 025 M in the weak base and 0. 039 M in the conjugate weak acid.
Therefore, a weak base and its conjugate acid are present in equal proportions in buffer solution. As we are aware, the Henderson-Hasselbalch equation can be used to determine the pH of a buffer solution that comprises a weak base and its conjugate acid.
[tex]pH = pK + log [\frac{A^-}{HA} ]\\[/tex]
[tex]= 5.15 + log( \frac{0.025}{0.037})[/tex]
[tex]=5.15 + log 0.64[/tex]
[tex]=5.15-0.19[/tex]
[tex]=4.96[/tex]
Therefore, the pH of the solution is 4.96.
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What is the molar solubility of agcl in 0. 30 m nacl at 25°C. ksp for agcl is 1. 77 × 10^-10.
Molar solubility of AgCl will be 0.59 × [tex]10^{-10}[/tex] M.
The amount of a chemical that can dissolve in one liter of a solution before reaching saturation is known as its molar solubility. This implies that the quantity of a substance it can disintegrate in a solution even before the solution becomes saturated with that particular substance is determined by its molar solubility.
A compound's molar solubility would be the measure of how many moles of such a compound must dissolve to produce one liter of saturated solution. The molar solubility unit will be mol L-1.
Calculation of molar solubility:
Given data:
M = 0.30 M
[tex]K_{sp}[/tex] = 1.77 × [tex]10^{-10}[/tex]
The reaction can be written as:
AgCl ⇔ [tex]Ag^{+} + Cl^{-}[/tex]
s s (s+0.30)
[tex]K_{sp}[/tex] = [[tex]Ag^{+}[/tex] ]+ [[tex]Cl^{-}[/tex]]
1.77 × [tex]10^{-10}[/tex] = s (0.30)
s = 1.77 × [tex]10^{-10}[/tex] / 0.3
s = 0.59 × [tex]10^{-10}[/tex] M
Therefore, molar solubility of AgCl will be 0.59 × [tex]10^{-10}[/tex] M.
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How would you distinguish benzoic acid and benzyl alcohol by their infrared spectra?
The OH peaks in the IR spectra of benzyl alcohol and benzoic acid should be compared and contrasted.
What is the IR spectra of Benzoic acid?The right-hand portion of the infrared spectrum of benzoic acid, between wavenumbers 1500 and 400 cm-1, is referred to as the fingerprint region. It results from a special combination of intricately overlapping vibrations of the atoms within the benzoic acid molecule.What is the IR spectra of Benzyl alcohol?A C-Cl bond is frequently shown by a peak at 700.There are a few more peaks at 1500 that are directed at a C=C bond.What is IR spectra?The percent transmittance (or absorbance) of the radiation through the molecule against the radiation's wave number forms the IR spectrum.
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It is important to contrast and compare the OH peaks in the IR spectra of benzyl alcohol and benzoic acid.
What does benzoic acid's IR spectrum look like?The fingerprint region is the region between wavenumbers 1500 and 400 cm-1 on the right side of the infrared spectrum of benzoic acid.The benzoic acid molecule's atoms vibrate in a unique pattern that involves intricately overlapping vibrations, which causes it.What does benzyl alcohol's IR spectrum look like?A peak at 700 is typically used to indicate a C-Cl bond.At 1500, there are a couple more peaks that are focused on a C=C bond.How do IR spectra work?The IR spectrum is made up of the radiation's wave number divided by its percent transmittance (or absorbance) through molecules.To learn more about IR spectrum visit:
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With respect to bonding and electrical conductivity, respectively, sulfur hexafluoride, sf6(g), would be described as?
With respect to bonding and electrical conductivity, respectively, sulfur hexafluoride, sf6(g), would be described as "covalent and a nonconductor" because sulfur hexafluoride would be a covalent compound since neither fluorine nor sulfur are metallic elements and aqueous solutions containing covalent bonding do not conduct electricity.
What is electrical conductivity?The ability of an electrical charges or heat to move through a material is measured by its conductivity. A material is considered a conductor if it offers relatively minimal resistance to the transfer of thermal or electric energy.
The electricity is conducted by-
Particles that are electrically charged migrate, which results in electrical conductivity in metals. The existence of electron pairs, that are electrons in an atom's outer shell that really are free to move, is what distinguishes the atom of metal elements. Metals can carry an electric current thanks to these "free electrons."Valence electrons can migrate through into the lattice that makes the physical configuration of a metal because they are free to do so. Free electrons pass an electrical charges as they move through metal in an electric field, resembling billiard balls striking one another.To know more about the Electrical conductivity, here
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As water freezes, ________. its hydrogen bonds break apartit loses its polarityit cools the surrounding environmentits molecules move farther apart.
The molecules of water move farther apart upon freezing.
Molecules are the compounds formed by the combination of one or more atoms by certain chemical bonds. Each molecule has distinctive physical and chemical properties.
Water is also a molecule consisting of two H atoms and one O atom. Its physical state in nature is liquid. The atoms present inside water are joined together by the hydrogen bonding. Upon freezing, water molecules start forming more hydrogen bonds with the molecules present in their neighborhood. This makes them to move farther and spread apart. This also marks the reason for ice being denser than water.
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Which type of nuclear decay is the radioactive isotope fe2659 likely to undergo?
Beta minus decay will be obtain in the radio-active isotope of Fe-26 power 59.
Whenever there are too many protons or even neutrons in a nucleus, one of the protons and neutrons will turn into the other, which is known as beta decay. During beta minus decay, a neutron transforms into a proton, electron, as well as antineutrino.
[tex]Fe_{26} ^{59}[/tex] → [tex]Co_{27} ^{59} +\beta_{1} ^{0}[/tex]
It can be seen that after the beta minus decay Fe changes into Co.
In beta decay , decrease in atomic number by one unit Fe atom get converted into Co atom.
Neutron-rich nuclei often decay by producing both an electron and an antineutrino.
Therefore, Beta minus decay will be obtain in the radio-active isotope of Fe-26 power 59.
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How much has co2 increased in the atmosphere since 1750? group of answer choices
Since 1750, about 46 percent of CO2 is increased in the atmosphere.
Co2 gas is considered as Greenhouse effect.
Green house effect : The trapping of the sun's warmth in a lower atmosphere of planet, due to the more and more transparency of the atmosphere to visible radiation from the sun than the infrared radiation which are emitted by the surface of the planet.
Due to greenhouse effect the temperature of earth surface increases.
Many reasons for increase in Greenhouse effect are as follow:
DeforestationBurning of fossil fuels.FarmingIndustrial waste and landfills. Global warmingdepletion of ozone layerAir pollutionDue to these reason the percentage of CO2 in the atmosphere is increased by 46.
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What is regular (specular)
reflection?
A. when all light rays come in at different angles of
incidence
B. when the rays of light reflect at different angles
C. when all light rays reflect at the same angle
D. when all light rays are perpendicular
Answer:
specular reflection reflects all light which arrives from a given direction at the same angles where diffus reflection reflects light in a broad range of direction
The delocalized cloud of π electrons in benzene is formed by the overlap of 6 ________ orbitals.
a. s
b. p
c. sp
d. sp2
e. sp3
The delocalized cloud of π electrons in benzene is formed by the overlap of 6 p-orbitals.
So, option B is correct one.
In the case of hydrocarbons, delocalisation occurs in benzene rings , where a hexagon of six carbon atoms has decalized electrons spread over the whole ring.
All of the carbon atoms in the benzene rings are [tex]sp^{2}[/tex] orbitals around the ring produces a framework of six sigma bonds, while the unhybridized p-orbitals which are perpendicular to this plane over in side-to-side fashion to form three pi-bonds.
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The addition of two-carbon units to a growing fatty acid chain is directly driven by?
The addition of two-carbon units to a growing fatty acid chain is directly driven by Decarboxylation of malonyl-coA.
Hence, Option C is correct answer.
What is Fatty Acid ?Fatty acids are carboxylic acid in which molecules are composed of a straight long chains of even number of carbon atom with hydrogen atoms. Fatty acid is an acid that is found in fats and oils.
What is Decarboxylation ?The chemical reaction which eliminates a carboxyl group and releases carbon dioxide is called decarboxylation.
Thus from the above conclusion we can say that The addition of two-carbon units to a growing fatty acid chain is directly driven by Decarboxylation of malonyl-coA.
Hence, Option C is correct answer.
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Disclaimer: The question was given incomplete on the portal. Here is the complete question.
Question: The addition of two-carbon units to a growing fatty acid chain is directly driven by
a) Hydrolysis of ATP
b) Oxidation of NADPH
c) Decarboxylation of malonyl-coA
d) Reduction of NADP+
Two gases are placed in a sealed flask and allowed to react. Which statement is true about the concentrations of the reactants and products when this closed system reaches dynamic equilibrium?
They will not necessarily be equal, but they will be constant.
What is dynamic equilibrium?In reversible reactions, dynamic equilibrium refers to a state in which the rate of the forward reaction is equal to that of the backward reaction.
Consdier the reaction below: A + B --> C + D
If the reaction is in dynamic equilibrium, the rate of formation of A and B will be the same as the rate of formation of C and D. However, this does not mean that the concentrations of the reactants and the products will be the same.
Since the rate of forward and backward reactions are equal, it means that the concentration of each of the species will be constant.
Thus, the above reaction is applicable to that of two reacting gases placed in a sealed flask and allowed to reach a dynamic equilibrium.
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They will be equal and constant. They will be equal but continuously changing. They will not necessarily be equal, and they will be continuously changing. They will not necessarily be equal, but they will be constant.
Calculate the number of atps generated by completely oxidizing one molecule of tripalmitoylglycerol into co2 and h2o ?
The number of atps generated is 330 ATP
What is atps?
At the cellular level, energy is used and stored as adenosine triphosphate (ATP). Adenine, ribose, and three serially bound phosphate groups make up the structure of ATP, which is a nucleoside triphosphate.
Glycerol provided us with 2 ATP and 2 NADH. In b-oxidation, we obtained 8 NADH and 8 FADH from each fatty acid, but since there were 3 fatty acids, we also produced 24 NADH and 24 FADH. We used 24 acetyl-CoA molecules, which were converted into 24 ATP, 24 FADH, and 72 NADH molecules by the citric acid cycle. You should obtain the same figures after adding everything up.
80 NADH x 3 ATP/NADH = 240 ATP
32 FADH x 2 ATP/FADH = 64 ATP
102 + 64 + 26 ATP = 330 ATP.
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A water molecule is considered a compound because
All of the atoms in the compound have the same number of protons.
You can separate the Oxygen from the Hydrogen via chemical means.
You can separate the hydrogen atoms from the Oxygen via physical means.
You cannot separate Oxygen and Hydrogen atoms.
Please help
[tex]{ \green{ \tt{option}}} \: (b)[/tex]
[tex]{ \orange{ \bold{A \: water \: is \: considered \: as \: compound \: because}}}[/tex]
[tex]{ \red{ \tt{you \: can \: separate \: the \: oxygen \: from \: the \: hydrogen \: via \: chemical \: means}}}[/tex]
Why are thiols more nucleophilic than alcohols?
Answer:
Thiols contain stronger acids than alcohols
Explanation:
Answer:
Sulfur is a bigger atom than oxygen and has a lower electgronegativity value. Therefore, the lone pair availability in thiol is higher than alcohol
Explanation:
This liquid carries red blood cells and white blood cells around the body. It also transports several different substances in solution, including -------- and------- .
Answer:
Water and Salts
Explanation:
Hope it helps u....
2CO(g) + O2(g) = 2CO2(g)
If 6.0 L of CO reacts at STP, how many liters of oxygen are required for the reaction?
Answer:
3.0 L O₂
Explanation:
If CO reacts at STP, it means that there are 1.0 moles of CO. To find the moles of O₂, you need to use the mole-to-mole ratio from the given equation.
1.0 moles CO 1 mole O₂
---------------------- x --------------------- = 0.5 moles O₂
2 moles CO
To calculate the liters of oxygen, you need to use Avogadro's Law:
V₁ / N₁ = V₂ / N₂
In this equation, "V₁" and "N₁" represent the volume and moles of the first molecule. "V₂" and "N₂" represent the volume and moles of the second molecule. You can plug the given and calculated values into the equation and simplify to isolate V₂.
V₁ = 6.0 L V₂ = ? L
N₁ = 1.0 moles N₂ = 0.5 moles
V₁ / N₁ = V₂ / N₂ <----- Avogadro's Law
(6.0 L) / (1.0 moles) = V₂ / (0.5 moles) <----- Insert values
6.0 = V₂ / (0.5 moles) <----- Simplify left side
3.0 = V₂ <----- Multiply both sides by 0.5
**I am not 100% confident on this answer. Please let me know if it is incorrect**
Answer:
2CO(g) + O2(g) → 2CO2(g)
If 9.0 L of O2 react at STP, how
many moles of CO2 form during the
reaction?
[?] mol CO2
Explanation:
What would it be if it was 9.0?
find the relative molecular mass of MgCo3
The molecular mass of MgCO3 is 84.313 grams/mol.
How Does The molecular Mass Calculator Work?The standard atomic weights for that element are listed in a table, and each atom is compared to those values. The molar mass calculator displays the findings in a table at the bottom that includes the number of atoms, the atomic weights of the constituent elements, and the molecule's molecular weight. It provides a solution for a molecular formula's overall mass.From there, we dissect the components of the formula for magnesium carbonate: an atom of magnesium, an atom of carbon, an atom of oxygen, etc.You will need to unpack any bracketed expressions because (yet) we don't have brackets implemented. They have no impact on weight in any case. Multiply each element by how many times the structure in brackets appears. For instance: C6H5-3PCCO becomes C18H15-3PCCO.The relative molecular mass of MgCo3
Symbol Mg C O
Atoms 1 1 3
Name Magnesium Carbon Oxygen
Atomic 12 6 8
Molar Mass 24.305 12.011 15.999
Total 24.305 12.011 47.997=84.313
The molecular mass of MgCO3 is 84.313 grams/mol.
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Explain how the data answered the essential question. What can you conclude from the experiment? Use the following questions to guide your thinking:
Does the filament with the anther rise above the stigma?
If the pollen is located above the stigma, the flower is generally self-pollinated. If the pollen is below the stigma, the flower is generally cross-pollinated. Based on this information, is your flower self-pollinated or cross-pollinated?
Answer:
sorry i don't know this question of answer
As a gaseous element condenses, the atoms become ________ and they have ________ attraction for one another.
As a gaseous element condenses, the atoms become close together and they have more attraction for one another.
What is condensation?
Condensation is the transformation of water from its gaseous or vaporous state into its liquid state. It typically occurs when warm airborne vapor comes into contact with a cold surface. When gas molecules transfer their energy to a cooler surface, they begin to slow down and attract one another, forming a liquid.Examples:
Dew in the morning occurs when moisture in the air condenses on grass that has been chilled over night.Droplets on the soda can. Moisture from the warm outer air condenses on the outside of the can due to its cool surface.A foggy windscreen. The moisture in the air in your automobile is increased by the breath and body heat of the passengers. The moisture condenses as droplets that fog your window when there is enough moisture present and a chilly enough windscreen.Learn more about the condensation with the help of the given link:
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Please help,
How could you tell a Ca(NO3)2 solution from a Zn(NO3)2 solution?
Answer:
Anhydrous calcium nitrate reaction with water is highly endothermic
Provide only the major alkene product that results when n,n-dimethylhexan-2-amine undergoes cope elimination?
The major alkene product that results when n,n-dimethylhexan-2-amine undergoes cope elimination is hexene or hex-1-ene.
The reaction in which an amine is oxidize to an intermediate called an N-oxide which , when heated , acts as base in an intramolecular elimination reaction. The oxidation of tertiary amine into N-oxide is called cope reaction.
This elimination gives the less substituted alkene along with more substituted alkene which is Zaitsev product.
Example: Cope elimination of n,n-dimethylhexan-2-amine form hexene.
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Arrange the procedural steps, from start to finish, that are required to prepare indigo from nitrobenzaldehyde and acetone in base, and then test its ability as a dye.
Acetone has α-hydrogens (on both sides) and thus can be deprotonated to give a nucleophilic enolate anion. The aldehyde carbonyl is much more electrophilic than that of a ketone, and therefore reacts rapidly with the enolate.
What is nitrobenzaldehyde?Synthesis. The synthesis of 3-nitrobenzaldehyde is achieved via nitration of benzaldehyde, which yields especially the meta-isomer. Creation allocation is about 19% for the ortho-, 72% for the meta- and 9% for the para isomers.Acetone, propanone, or dimethyl ketone, is an organic combination with the formula (CH3)2CO. It is the easiest and smallest ketone. It is a colorless, highly volatile, and combustible liquid with a characteristic aromatic odor.Nitration of benzene with conc nitric acid and conc sulphuric acid gives nitrobenzene. Chlorination with chlorine in the existence of anhydrous aluminum chloride gives meta nitro chlorobenzene.To learn more about sulphuric acid, refer to:
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what electron configuration for ion C^4+
Answer:1s2
Explanation:
The average atomic mass of lithium is 6.94 amu. Based on the atomic masses of the two isotopes of lithium, how do the relative abundances of the isotopes compare?
Answer:
Answer:
a) The relative abundance of Li-6 =0.0749 = 7.49%
The relative abundance of Li-7 =1 - 0.0749 = 0.9251 =92.51%
b) The fraction of sample of lithium atoms with exact mass of 6.941 amu is 0.
The relative abundance of ⁶Li is around 0.076, and the relative abundance of ⁷Li is approximately 0.924.
To determine the relative abundances of isotopes, we need to compare the atomic masses of the isotopes and their average atomic mass.
Lithium has two stable isotopes: lithium-6 (⁶Li) and lithium-7 (⁷Li). The atomic masses of these isotopes are approximately 6.015 amu and 7.016 amu, respectively.
The average atomic mass of lithium, given as 6.94 amu, is a weighted average of the masses of the two isotopes, taking into account their relative abundances.
Let's assume the relative abundance of ⁶Li is x (in decimal form) and the relative abundance of ⁷Li is (1 - x). The average atomic mass equation can be set up as:
(6.015 amu * x) + (7.016 amu * (1 - x)) = 6.94 amu
Simplifying the equation:
6.015x + 7.016 - 7.016x = 6.94
Combining like terms:
-0.001x = -0.076
Dividing both sides by -0.001:
x ≈ 0.076
Therefore, the relative abundance of lithium-6 (⁶Li) is approximately 0.076, and the relative abundance of lithium-7 (⁷Li) is approximately (1 - 0.076) = 0.924.
In summary, the relative abundance of ⁶Li is around 0.076, and the relative abundance of ⁷Li is approximately 0.924.
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The tetrahedral structure that forms the backbone of all silicate minerals is composed of silicon and what other element?
The tetrahedral structure that forms the backbone of all silicate minerals is composed of silicon and option(b) i.e, oxygen
The tetrahedron-shaped silica chemical structure. It comprises a core silicon atom that connects with four oxygen atoms on both sides. The tetrahedron-shaped geometric figure that is drawn around this configuration has four sides, each of which is an equilateral triangle.
Silicon and oxygen make up the silica tetrahedron, which serves as the base for all silicate crystals. In all sorts of rocks and everywhere in the world, the mineral quartz, SiO2, is formed. In deposited rocks, it manifests as sand grains, in igneous and metamorphic rocks, as crystals, and in veins that cut through all different types of rocks. These veins occasionally contain gold or other precious metals. It is widely known that up until the late 1700s, it was simply known as rock crystal. Quarts belong to a class of minerals known as silicates, all of which include silicon and oxygen in varying amounts. The majority of the minerals in the crust of the planet are silicates, and most estimates place 97 percent of the mantle and 95 percent of the crust in the crust.
The complete question is:
The silica tetrahedron that forms the backbone of all the silicate minerals is composed of silicon and what other element?
a. magnesium c. iron
b. oxygen d. carbon
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A liquid takes 10.14 x 10^6 j of energy to boil 28.47 kg at 298 k. using the latent heats of vaporization of 5 liquids below, determine what the substance is. acetone: 538,900 j kg-1 ammonia: 1,371,000 j kg-1 propane: 356,000 j kg-1 methane: 480,600 j kg-1 ethanol: 841,000 j kg-1
Correct option is C
Latent heat of vaporization is the amount of heat required to bring about the phase transition from liquid to gaseous state, at its boiling point.
The substance is Propane :
10140000 J of heat is used to boil 28.47 kg at 298 K. Here, the important thing is, the liquid is changing to vapor and the temperature is not changing means it's a phase change. So, the formula used for this is:
q=m× Δ[tex]H_{vap}[/tex]
where, q is the heat energy, m is mass and Δ[tex]H_{vapour}[/tex] is the enthalpy of vaporization.
Let's rearrange the formula for as:
Given mass of the liquid = 28.47kg
Heat required to boil the liquid = 10.14 ×[tex]10^{2} J[/tex]
Let's plug in the values: [tex]\frac{10.14*10^{2}J }{28.47Kg} =356164\frac{J}{Kg}[/tex]
Rounding off 356164 will turn into 356000 J[tex]Kg^{-1}[/tex]
Hence, the right choice is C. propane 356000 j[tex]Kg^{-1}[/tex]
What is latent heat ?
Latent heat, energy absorbed or released by a substance during a change in its physical state (phase) that occurs without changing its temperature.
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