Molecular formula of a compound whose molecular mass is 60.00 g/mol and has an empirical formula of C₂H₈N₂.
We know the empirical formula and thus the molar mass of the empirical formula, we simply need to find out how many of these fit into the molar mass of the molecular formula.
In this problem, we have an empirical formula of CH₄N
so the molar mass is 12 + 4 + 14 = 30 g/mol.
Molecular formula mass/Empirical formula mass=60 g/mol/30 g/mol=2
The molecular formula is TWICE that of the empirical formula.
Molecular formula = 2XCH₄N = C₂H₈N₂
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Answer:
C2H8N2
Explanation:
edge 2023
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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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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A cylindrical grain has a base radius of 5m. the surface area is 1099m^2. What is the height of the bin to the nearest metre?
The height of the bin is 29.9m.
The quantity of space enclosing a three-dimensional shape's exterior is its surface area.
The total surface area of the cylinder formula is simply the sum of the base surface area and the lateral surface area.
The radius of the cylinder, r = 5m
Surface area = 1099 m²
∴ A = 2πrh + 2πr²
[tex]h = \frac{A- 2\pi r^2}{2\pi r}[/tex]
[tex]h = \frac{1099- 2 (3.141) 5^2}{2 (3.141) 5}[/tex]
[tex]h = \frac{1099- 157.05}{31.41}[/tex]
[tex]h = \frac{941.95}{31.41}[/tex]
[tex]h = 29.9 m[/tex]
Therefore, the height of the bin is 29.9m.
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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....
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+
An aerosol mixture of particulates and sulfur compounds form a grayish colored substance that is called ________. inversion smog industrial smog photochemical fog sulfuric aerosols industrial fog
An aerosol mixture of particulates and sulfur compounds form a grayish-colored substance that is called industrial smog.
What is Particulate Matter?Airborne particulate matter (PM) is a composite of several chemical species rather than a single contaminant. It consists of a complex mixture of solids and aerosols, including dry solid particles, liquid-coated solid cores, and minute liquid droplets. Particles can contain inorganic ions, metallic compounds, elemental carbon, organic compounds, and chemicals from the earth's crust. They can vary greatly in size, shape, and chemical makeup. For the goal of regulating air quality, the particle diameter is used.
Those that have a diameter of 10 microns or below (PM10) are inhalable and can have a negative impact on health. Particles with a diameter of 2.5 microns or less are considered to be fine particulate matter (PM2.5). Consequently, a percentage of PM10 is made up of PM2.5.
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The atomic models after dalton’s time included ideas about the atomic structure. which atomic model that shows the atomic structure is missing from this set? bohr’s model schrödinger’s model rutherford’s model thomson’s model
Which atomic model that shows the atomic structure is missing from this set?
Dalton’s model
In 1898, J. J. Thomson proposed the first of many atomic models to come as he made the proposition that the shape of an atom was like a sphere.
What is an Atomic Structure?This refers to the way and manner an atom is arranged and the things that are contained in it.
Hence, we can see that an atom contains:
ProtonsNeutronsNucleusTherefore, the atomic model that shows the atomic structure is missing from this set is Dalton's model.
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The complete question is:
The model of the atom has changed as scientists have gathered new evidence. Four models of the atom are shown below, but one important model is missing.
An image at left with overlapping red and blue balls in the center with a circular fuzzy green cloud outside them. An image at center left with a purple ball in the center surrounded by overlapping concentric black ovals, each with a small green ball on each of the 6 ovals. An image at center right with a large black cross in a purple circle with a black line around the purple, with 10 small green balls dispersed within the purple circle.
Which atomic model is missing from this set?
Bohr’s model
Dalton’s model
Rutherford’s model
Thomson’s model
Answer: B. schrodingers model
Explanation:
correct on edge
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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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.
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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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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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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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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Describe how water contributes to the fitness of the environment to support life.
Water contributes to the fitness of the environment to support life by acting as a Solvent for molecules to interact Moderate Earth's climate.
Water contributes to the fitness of the environment to support life in several ways :
Life on Earth began in water and evolved there for 3 billion years before colonizing the land.Even terrestrial organisms are tied to water.Most cells are surrounded by water.Cells are about 70–95% water.Water is a reactant in many of the chemical reactions of life.Water is the only common substance that exists in the natural world in all three physical states of matter: solid ice, liquid water, and water vapour.Water stabilizes air temperatures by absorbing heat from warmer air and releasing heat to cooler air.Water can absorb or release relatively large amounts of heat with only a slight change in its own temperature.Water’s high heat of vaporization moderates climate.Much of the sun’s heat absorbed by tropical oceans is used for evaporation of surface water.Water is unusual because it is less dense as a solid than as a cold liquid.Most materials contract as they solidify, but water expands.At temperatures above 4°C, water behaves like other liquids, expanding as it warms and contracting as it cools.Water begins to freeze when its molecules are no longer moving vigorously enough to break their hydrogen bonds.When water reaches 0°C, water becomes locked into a crystalline lattice, with each water molecule bonded to a maximum of four partners.Learn more about Water here : https://brainly.com/question/5060579
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calculate the pressure exerted by an book of mass 20kg occupying an area of 2 m square.
The answer is 100 Pa.
The formula for calculating pressure is :
Pressure = Force ÷ Area
We are given that :
mass = 20 kgarea = 2 m²We also know that :
Force = mass ×g
So, force will be :
F = 20 × 10 F = 200 NNow, we can finally calculate pressure :
P = 200 ÷ 2P = 100 Pawhat electron configuration for ion C^4+
Answer:1s2
Explanation:
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?
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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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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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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What does the kinetic theory state about the relationship between the speed and temperature of gas molecules?
As the temperature increases, the speed of gas molecules increases
The kinetic theory state about the relationship between the speed and temperature of gas molecules as with an increase in temperature, the speed of gas molecules increases.
The energy that an object possesses as a result of its motion is known as kinetic energy.
The average of the kinetic energies of all the particles in a system is known as the average kinetic energy.
The following equation provides the answer:
K = [tex]\frac{3RT}{2}[/tex]
K= kinetic energy
R= gas constant
T= temperature
It is clear from above that kinetic energy and system temperature are inversely correlated. Therefore, if the temperature is higher, the system's average kinetic energy will also be higher, increasing the speed of the molecules.What does kinetic theory state?
The kinetic theory of matter states that all matter is made of small particles that are in random motion and that have space between them.
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What is the multiplicity of the indicated carbon in an off-resonance decoupled c-13 nmr spectrum?
Tert-butyl alcohol's 13C-NMR spectrum will only display two signals.
(I) Signal at about 31 ppm: This signal is for the more shielded and electron-rich carbon atoms and is upfield. The height of the peak on the y-axis indicates the relative quantity of carbon atoms to other peaks. Since it is three times as tall as the second signal in this instance, it is clear that this peak represents three carbon atoms.
(ii) Signal at about 70 ppm: This signal is directed downfield and pertains to the carbon atom, which is more exposed and has an environment poor in electrons. The height of these peaks is only one carbon higher than the second signal. Furthermore, the exposed environment demonstrates this carbon.
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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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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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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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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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Risk premiums on corporate bonds tend to ________ during business cycle expansions and ________ during recessions, everything else held constant.
Risk premiums on corporate bonds tend to decreases during business cycle expansions and increases during recessions, everything else held constant.
A bond that is sold for more than it is worth. when the prevailing interest rate is lower than the coupon rate.
Corporate bond risk premiums have become typically anticyclical, meaning they rise during recessions as well as fall throughout expansions of the business cycle.
Bonds that trade above their face value or cost more than their face value are referred to as premium bonds. Since its interest rate has been higher than those of the current market, a bond may trade at a premium. The bond's price may also increase as a result of the company's as well as the bond's credit ratings.
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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]
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
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
