which of the following does not affect the solubility of a gas in water a. salinity of the water b. temperature of the water c. atmospheric pressure d. concentrations of other gasses in solution
The option which does not affect the solubility of the gas in water is d) concentrations of other gasses in solution.
The solubility of the gas is depends on the interaction in between the molecules of the water and the molecules of the gas. The factors which will affect the solubility of the gas in the water is given as :
salinity of the water temperature of the waterpressureThe temperature will affect the solubility of the gas and the solubility of the solids. the pressure will affect the solubility of the gas but does not affect the solubility of the solid.
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What is the total number of joules released when a 8.00-gram sample of water changes from liquid to solid at 0°C?
According to specific heat capacity, 3360 J are released when a 8.00-gram sample of water changes from liquid to solid at 0°C.
What is specific heat capacity?Specific heat capacity is defined as the amount of energy required to raise the temperature of one gram of substance by one degree Celsius. It has units of calories or joules per gram per degree Celsius.
It varies with temperature and is different for each state of matter. Water in the liquid form has the highest specific heat capacity among all common substances .Specific heat capacity of a substance is infinite as it undergoes phase transition ,it is highest for gases and can rise if the gas is allowed to expand.
It is given by the formula ,
Q=mcΔT
Substituting values in above formula Q= 8×4.2×(100-0)=3360 J.
Thus, 3360 J are released when a 8.00-gram sample of water changes from liquid to solid at 0°C.
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Draw a Lewis structure for BrCl5 . What is the molecular geometry around the central atom in the Lewis structure?
The BrCl5 Lewis structure comprises an octahedral electron geometry and a square pyramidal molecular shape. Five bonds hold the core bromine atoms together.
What is the molecular geometry of the main atom in the compound?When the center atom possesses one or more lone pairs of electrons, the molecular geometries of the molecules alter. What is referred to as the electron domain geometry is determined by the overall number of electron pairs, including bonded pairs and lone pairs.
What atom serves as the center of a Lewis structure?The center atom in a molecular formula is often the atom with the lowest subscript and the largest bonding potential. The least electronegative atom is normally the central atom when all the atoms typically make the same number of bonds.
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What is the correct chemical formula for hexachlorostannate (II) ion?
The correct chemical formula for the hexachlorostannate (II) ion is SnCl6^2-. This ion contains one tin atom bonded to six chlorine atoms. The charge on the ion is indicated by the superscript "2-" at the end of the formula, which indicates that the ion has a net charge of -2.
at the end of glycolysis, in what molecule(s) can one find the energy that was contained in the chemical bonds of glucose? select all that apply.
At the end of glycolysis, one can find the energy that was contained in the chemical bonds of glucose in ATP, NADH and pyruvate molecule.
The process of glycolysis takes place in the cytosol of a cell. It can be broken down into two phases viz. energy requiring phase and energy releasing phase.
Energy requiring phase: The starting molecule i.e glucose is at first rearranged and two phosphate groups are attatched to it, which comes from ATP. The phosphate groups form the sugar- fructose-1,6-biphosphate. This splits into three-carbon sugars
Energy releasing phase: The three carbon-sugars are converted into three-carbon molecules i.e two ATP molecules and one NADH molecule and pyruvate.
Thus, in ATP, NADH and pyruvate we can find the energy contained in chemical bonds of glucose.
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what is the formal charge on the oxygen atom in n2o (the atomic order is n–n–o)?
Therefore, in both the resonance structure, the fundamental value of nitrous oxide is zero.
Is oxygen the same as oxide?Therefore, it is abundantly evident from the definitions of atoms and ions that oxide is an atom and oxide is an ion with a charge = -2, which indicates that it has gained two additional electrons. We may alternatively say that an oxide is a chemical substance that has at least 1 oxygen atom.
Oxide – an acid?Oxides are divided into acidic, basic, amphoteric, and neutral categories based on their acid-base properties: An oxide is referred to as acidic if it reacts with water to form an acid. An oxide that creates a base from water is known as a basic oxide.
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what is the rate constant of a first-order reaction that takes 555 secondsseconds for the reactant concentration to drop to half of its initial value?
The rate constant of a first-order reaction that takes 555 seconds for the reactant concentration to drop to half of its initial value is 1.2 x 10^-3 sec^-1.
A first-order reaction refers to a chemical reaction in which the rate of reaction is proportional to the concentration of the reactant. In other words, doubling the reactant concentration doubles the reaction rate. The time taken that is taken for original population of radioactive atoms to decay to half of initial value is called the half-life. The half-life of a first-order reaction is a constant that is related to the rate constant (k) for the reaction given by: t1/2 = 0.693/k. Radioactive decay reactions are first-order reactions.
According to the provided information, t1/2 = 555 seconds
Hence,
555 = 0.693/k
k = 0.693/555 = 0.0012486 = 1.2 x 10^-3 sec^-1
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Write structural formulas for the products of 1,2 and 1,4 addition of hydrogen chloride to 2,4-hexadiene. My book solution has this as the answer, but I cant understand how they got the answers? Can someone explain?
The structural formulas for the products of 1,2 and 1,4 addition of hydrogen chloride to 2,4-hexadiene are attached as a picture.
For the reaction that was shown above the H-Cl molecule is added to the first double bond during the 1,2-addition reaction, while the second double bond does not participate in the reaction itself.
However, in the 1,4-addition reaction, the first step is identical, but in the second step, the 2nd double bond has the resonance to stabilize the carbocation. As a result, the location of the double bond shifts, and Cl- is added to the fourth carbon.
The complete mechanism is attached.
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Which one of the following will exhibit the highest osmotic pressure at 25°C?
a) KCl.
b) Glucose.
c) Urea.
d) Calcium chloride.
Highest osmotic pressure is given by solution which produce maximum number of ions i.e. CaCl2 (Calcium chloride).
What is Osmotic pressure ?The osmotic pressure is the least amount of pressure that must be applied to a solution in order to stop a semipermeable barrier from allowing a solution's pure solvent to pass through. Additionally, it is described as a measurement of a solution's propensity to absorb its pure solvent through osmosis.
Water cannot pass through a semipermeable membrane due to osmotic pressure. Utilizing the osmotic pressure formula, one may determine the pressure that prohibits osmosis from taking place. Assume that you are preparing a saltwater solution. The mixture of water and salt (solute) will make up the solution (solvent).
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Dilute a solution that has an initial concentration of 0.03% to 0.0006%.
The solvent that must be added to dissolve a 0.03% solution to a 0.0006% solution is 49 times its original volume.
Dilution is a solution to which solvent is added. A common solvent is a water. Equation expressing dilution
V₁ M₁ = V₂ M₂
V₁ = the initial volume of solution before dilutionV₂ = the volume of solution after dilutionM₁ = the concentration of the solution before dilution = 0.03%M₂ = the concentration of the solution after dilution = 0.0006%V₁ × 0.03% = V₂ × 0.0006%
V₂ : V₁ = 0.03% ÷ 0.0006%
V₂ : V₁ = 50
V₂ = 50 V₁
Added solvent
V₂ - V₁ = 50V₁ - V₁ = 49V₁
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When magnesium metal (Mg) reacts with hydrochloric acid (HCl), magnesium chloride (MgCl2) and hydrogen gas (H2) are produced according to the following chemical equation. 2 HCl (aq) + Mg (s) → MgCl2 (aq) + H2 (g) If 1.44 moles of HCl is consumed in the chemical reaction above, how many grams of HCl are consumed? Molar mass of HCl is 36.46 g/mol.
When magnesium metal (Mg) reacts with hydrochloric acid (HCl), magnesium chloride (MgCl2) and hydrogen gas (H2) are produced according to the following chemical equation. 2 HCl (aq) + Mg (s) → MgCl2 (aq) + H2 (g), 73 grams of HCl are consumed.
Chemical equation utilize symbols to indicate things like the direction of a reaction and the physical states of the parties involved in the process. The first chemical equation was developed in 1615 by the French chemist Jean Beguin. On paper, chemical reactions can be represented using chemical equations; an example of this is provided below.
2H2 + O2 → 2H2O
One of the following four symbols can be used to denote the separation between the reactants and the products (for which the chemical formulae are expressed in chemical equations). The symbol " is used to represent a net forward reaction. The symbol "" is used to signify a chemical equilibrium state. The symbol "=" denotes stoichiometric relationships. The sign " is used to represent a reaction that can happen both forward and backward. The '+' character in a chemical equation serves to divide two or more entities from one another on each side of the reaction symbols discussed above. It should be noted that the sign "" is frequently translated as "gives rise to" or "yields" in chemical equations.
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show how you would synthesize the following acid using carbonation of a grignard reagent.
The compound bromo benzene reacts with magnesium inpresence of ether to form phenyl magensium bromide that called as Grignard reagent. Phenyl magnesium bromide reacted with CO₂ followed by hydrolysis to form benzoic acid.
An organomagnesium halide with the formula RMgX is a Grignard reagent, and in it, X is a halogen (-Cl, -Br, or -I), and R is an alkyl or aryl group (based on a benzene ring) group. A Grignard reagent is used to start a Grignard reaction, which produces a secondary or tertiary alcohol from a ketone or aldehyde. A powerful base is provided by Grignard reagent. In the absence of acidic hydrogen, the Grignard reagent performs a nucleophilic assault. With its ether solvent, the Grignard reagent forms complexes. An essential component in the synthesis and stability of the Grignard reagent is complex formation with ether molecules.
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recall that photosynthetic rates remain relatively constant in regions near the equator. imagine that tropical environments persist throughout earth's northern and southern hemispheres; that is, that earth's entire climate mirrors that near the equator. if keeling had collected his atmospheric co2 data on such an earth, what would you expect the keeling curve to look like? please choose the correct answer from the following choices, and then select the submit answer button. answer choices a straight line sloping upward, indicating that atmospheric co2 levels would not seasonally oscillate, but would increase over time a straight line sloping downward, indicating that atmospheric co2 levels would not seasonally oscillate, but would decrease over time a straight line without a slope, indicating that atmospheric co2 levels would have remained constant over time a sinusoidal curve sloping upward, indicating that atmospheric co2 levels would fluctuate seasonally, but would increase over time a sinusoidal curve sloping downward, indicating that atmospheric co2 levels would fluctuate seasonally, but would decrease over time
A Straight line sloping upward (atmospheric CO2 levels would not seasonally oscillate, but would have increased over time).
A straight line up the graph means it has a positive slope, meaning that even though atmospheric carbon dioxide levels would not oscillate through the seasons, in this case in tropical environments in the northern and southern hemisphere Earth, that is, the climate close to the equator, the positive slope indicates that carbon dioxide levels would increase over time.
Photosynthesis is the process through which green plants and certain other organisms make their food using carbon dioxide and water in the he presence of Sunlight.
During photosynthesis, energy conversion from light energy into chemical energy takes place.
Photosynthesis is one of the major processes that helps to eliminate and reduce the quantity of carbon dioxide in the atmosphere,it also serve to make oxygen present in the atmosphere.
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sugar is a covalent compound. how do molecules of a sugar sample behave when the sample dissolves in water? responses the solute molecules separate from each other by dispersion. the solute molecules separate from each other by dispersion. the solvent molecules separate from each other by dispersion. the solvent molecules separate from each other by dispersion. the solvent molecules separate from each other by ionization. the solvent molecules separate from each other by ionization. the solute molecules separate from each other by ionization.
Molecules of a sugar sample behave when the sample dissolves in water the solute molecules separate from each other by dispersion. Option B.
Sucrose is a polar molecule. Polar water molecules attract the negative and positive regions of polar sucrose molecules, causing sucrose to dissolve in water. Sugar is a covalent, slightly polar compound that can dissolve in water due to its polarity.
Every time you break down a covalent compound like sugar you see a physical change. The molecules move further apart in the solvent but do not change. Dissolving sugar in water is a physical change. This is because no new matter is formed. Also, the process is reversible. Water and sugar are separated by evaporation followed by condensation and crystallization.
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Draw tne electrcn configuration for a neutral atom of cobalt: energy
Cobalt has an atomic number of 27. Hence, the electron configuration for a neutral cobalt atom is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁷. The graph drawing for this configuration is in the attached image.
What is the electron configuration?The electron configuration is an element we can use to describe the electron distribution in its atomic orbitals. An electron configuration represents its energy level, the type of orbital they are in, and the number of electrons in the orbital. For example, the outer configuration of cobalt is 3d₇. This means, cobalt places in level 3 energy, has a d orbital, and only has 7 electrons that last in the 4th orbital with a spin number of +1/2.
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What is the electron configuration of V3+? [Ar]4s23d3 [Ar]4s23d0 [Ar]4s03d2 [Ar]4s23d5 What are possible correct quantum numbers for two outer most valence electrons in V3+? 3,3,-2, +1/2 AND 3,3,-1, + 1/2 3,2,-2,+ 1/2 AND 3,2,-1, + 1/2 4,1,0 + 1/2 AND 4,1,0, - 1/2 4,0,0+ 1/2 AND 4,0,0, - 1/2 How many unpaired electrons does V3+ have? Three One None Two Is V3+ paramagnetic or diamagnetic? Why? Diamagnetic because it has paired electrons Paramagnetic because it has unpaired electrons Paramagnetic because it has paired electrons Diamagnetic because it has unpaired electrons
Therefore, V3+ contains 20 electrons. As a result, V3+ has an electron configuration of [Ar]3d2 [A r] 3 d 2.
Which arrangement of electrons is correct?1s22s22p63s23p64s23d104p3 ( c ) ( c ) s 2 s 2 s 2 p 6 s 2 s 2 p 6 s 4 s 2 3 d 10 4 p Electronic configuration should be expressed as 3 in this format. The electronic setup is written in accordance with Aufbau, Pauli, and Hund's criteria.
How is the electron configuration performed?Three One Zero Two V3+ is diamagnetic or paramagnetic, right? Why? Having paired electrons makes something diamagnetic. due to the unpaired electrons, it is magnetic. due to its paired electrons, it is magnetic. Having unpaired electrons makes it diamagnetic.
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at 273 k, ice and liquid water are in equilibrium. what relation then must be true of the vapor pressures of pure ice and pure liquid water at 273 k?
Relation then must be true of the vapor pressures of pure ice and pure liquid water at 273 k are cooling impact of ice at 273 K is greater than that of water at the same temperature because ice absorbs more heat to overcome the latent heat of fusion.
How does latent heat work?The energy needed to induce a change in the material's physical state, which results in the production of the liquid, is known as latent heat of fusion. It must be applied to solid matter.
The cooling effect of ice at 273 K is due to the absence of latent heat and hidden heat, which are present in water and cause them to be less chilly than ice at the same temperature.
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waghorne, w.e.; rous, a.j. determination of the relative atomic masses of metals by liberation of molecular hydrogen. j. chem. ed. 2009, 86, 350-351.
By using hydrochloric acid to react with calcium, magnesium, and aluminum, and then measuring the amount of hydrogen gas that is released, determine the atomic masses of these three elements.
How is hydrogen gas volume measured?Given that one mole of dihydrogen (H2) weighs 2,0159 g/mo and that the experimental density of hydrogen is 0,0899 g/L at 0 °C and 0,0837 g/L at 20 °C, it is possible to compute the precise molar volume of hydrogen.
How do you figure out how much hydrogen gas STP produces?One mole of gas has a volume of 22.4 dm3 at standard pressure and temperature, or stp (0 °C, 101,500 N m-2). The students can anticipate a response of roughly 24 dm3 at ambient temperature and pressure, rtp. The volume at stp can be calculated using the equation P1V1/T1 = P2V2/T2 by more capable students.
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QUESTION 27 The major chemical structures of hormones include
O polysaccharides, esters, and steroids. 2 points only molecules containing amine groups.
O steroids, amino acid derivatives, and esters.
O steroids, polypeptides, and anino acid derivatives. only steroids.
Answer will be fourth option : steroids, polypeptides and amino acid derivatives.
What are steroids?
Steroids, also called corticosteroids, are anti-inflammatory drugs used to treat a variety of conditions.
These are different from anabolic steroids, which are used illegally to increase muscle mass. Unpleasant side effects such as increased appetite, mood swings, and sleep disturbances may occur. This is most common with steroid tablets.
Side effects usually go away when treatment is stopped, but do not stop taking the medicine without talking to your doctor. Stopping prescribed medications can cause other unpleasant side effects (withdrawal symptoms).
Therefore, answer will be fourth option : steroids, polypeptides and amino acid derivatives.
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g a reaction which is exothermic and has an overall increase in entropy is a) spontaneous only at high t b) spontaneous only at low t c) always spontaneous d) spontaneous in the reverse direction.
A reaction which is exothermic and has an overall increase in entropy is
A) spontaneous only at high T
B) spontaneous only at low T
C) always spontaneous
D) spontaneous in the reverse direction.
The correct option is C) i.e., always spontaneous
Spontaneity is determined by the free energy. When ΔGΔG is negative, it is spontaneous.
ΔG=ΔH−TΔSΔG=ΔH−TΔS
The problem indicates that the ΔSΔS is positive. If the reaction is exothermic, this means that the ΔHΔH is negative.
ΔGΔG is going to be negative no matter the temperature.
A spontaneous process is one that occurs on its own, without any energy input from the outside. For example, a ball will roll down an incline; water will flow downhill; ice will melt into water; radioisotopes will decay, and the iron will rust.
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What is an element?
Please help my little sis needs help and I forgot what it is
a substance that can’t be broken down into another substance.
3. look at the periodic table listing ionic radii trends. why are the radii changing as you move down the table within one column? why are the radii changing as you move across the table from left to right within one row?
The ionic radius grows in the Periodic Table as we proceed down a column or group. Moving through a row or period, the ionic radius decreases from left to right.
Because each row adds a new electron shell, ionic radii grow as we proceed down the column. Additional layers of electrons are being added as you progress down a group in the periodic table, which naturally causes the ionic radius to rise as you do so. Moving through a row or period, the ionic radius decreases from left to right. The outer valence shell doesn't change but there are extra protons added, which causes the positively charged nucleus to attract electrons more tightly. However, the ionic radius rises for nonmetallic elements since there are
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Question 3 (1 point)
Michelle is trying to find the average atomic mass of a sample of an unknown
element. She finds that her sample contains 28.49% of an isotope with a mass of
56.2925, while the rest of the sample is an isotope with a mass of 52.4566. What is
the average atomic mass of her sample? Please round your answer to 0.01 amu.
Your Answer:
Answer
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The average atomic mass of Michelle's sample is equal to 53.549 amu.
What is the natural abundance of elements?Natural abundance can be defined as the abundance of natural isotopes of a chemical element found on a planet. The relative atomic mass can be defined as the atomic weight of the element in the periodic table.
The natural abundance of an isotope is affected by the probability of its creation and by the production of an isotope as a daughter of the natural radioactive isotope.
The mass of one isotope = 56.2925 amu, relative abundance =28.49%
The relative abundance of the other isotope = 100 - 28.49 = 71.51 %
The mass of the other isotope = 52.4566 amu
Average atomic mass = 56.2925 × 0.2849 + 52.4566 × 0.7151
Average atomic mass = 16.0377 + 37.511
Average atomic mass = 53.549 amu
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which statement is true about 22.4 l each of hydrogen, ammonia, and uranium dioxide gas assuming that the temperature and pressure are the same for all the gases?responsesthe gases have the same number of molecules.the gases have the same number of molecules.hydrogen gas has the least number of molecules.hydrogen gas has the least number of molecules.oxygen gas has the most number of molecules.oxygen gas has the most number of molecules.uranium dioxide gas has the most number of molecules.
The statement is true about 22.4 l each of hydrogen, ammonia, and uranium dioxide gas assuming that the temperature and pressure are the same for all the gases is the gases have the same number of molecules
The ideal gas equation is given as :
P V = n R T
n = P V / R T
if for the 22.4 L each of the gas that is hydrogen , ammonia and the uranium dioxide gas are in the same temperature and the pressure then the number of moles of the each gas are equal.
Thus, the all the gases is the gases have the same number of molecules
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Answer: The gases have the same number of molecules.
Explanation:
Ethylene glycol, HOCH2CH2OH, may look nonpolar when drawn, but an internal hydrogen bond results in an electric dipole moment, Explain.
An electric dipole moment is produced by an internal hydrogen bond. Because the bond polarity of two carbon-oxygen bonds cancel each other out, ethylene glycol seems to be non-polar. As a result, ethylene glycol has no dipole moment.
Are there dipole-dipole forces present in ethylene glycol?Therefore, the intermolecular forces for ethylene glycol include dispersion, dipole-dipole, and hydrogen bonding.
What distinguishes a hydrogen bond from a dipole-dipole interaction?Dipole dipole interactions take place when partially negatively charged molecules engage with a nearby molecule with a positive charge, which is the main distinction between them and hydrogen bonds. In contrast, the strong dipole-dipole bonding that occurs between O and N is known as hydrogen bonding.
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under irreversible (kinetic) conditions, will the exo or endo product be preferred for this reaction?
Exothermic Reaction preferred for this reaction.
In the exo product, the pair of hydrogens on the diene ends up cis to the pair of hydrogens on the dienophile when the rings become fused. In the endo product, the opposite is true: the pair of hydrogens on the diene come out trans to the pair of hydrogens on the dienophile when the rings fuse together.
Exo And Endo Diels-Alder Products Are Diastereomers Of Each Other.These two products are stereoisomers. But since they are not non-superimposable mirror images (i.e. not enantiomers), they are diastereomers.These two molecules can be separated due to the fact that they have different physical properties.
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Which electrons in this diagram contribute to the stability of the ion?
a. One electron in the sigma 1s MO and another one in the sigma* 1s MO.
b. The two electrons in the sigma 1s MO.
c. All electrons.
d. The electron in the sigma* 1s MO.
Energy-level diagram for theHe2+ ion:
One example of a heteronuclear diatomic molecule with both atoms in the second row is carbon monoxide. The 2s and 2p orbitals serve as the valence molecular orbitals in both atoms.
What exactly is the co2 molecular orbital diagram?
An O—O ligand fragment and a C atom serve as the foundation of the carbon dioxide MO diagram. The O—O fragment and carbon both have 2S and 2Px, y, z orbitals, which are involved in the creation of molecular orbitals.
What exactly is the O2 molecular orbital diagram?
Because of this, O2's electronic configuration is as follows: O2:KK(σ2s) 2(σ2s∙) 2(π2px)2=(π2py)2(π2px)1=(π2py∙) 1. The oxygen molecule's molecular orbital energy level diagram is shown as follows: Bonding sequence 2NbNa=284=2. Consequently, the oxygen molecule has two bonds.
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how deep under the surface of a body of water would the pressure be double that at the surface? (1 atm
The pressure would be double that at the surface when 10 m under the surface of a body of water.
How deep under the surface of water would the pressure be double that at the surface?The deeper you go under the sea, greater is the pressure of the water pushing down on you. For every 33 feet (10.06 meters) you go down, pressure increases by one atmosphere
At sea level, pressure of the air that surrounds us is equal to 1 atmosphere. Diving 10 meters deep causes pressure to be doubled as water is much denser than air, it exerts a greater compressive force on your body.
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To answer the questions; interpret the following Lewis diagram for NHF2 H- N~F 1. For the central nitrogen atom: The number of non-bonding electrons The number of bonding electrons The total number of electrons 2. The central nitrogen atom A. obeys the octet rule: B. has more than an octet: C.has less than an octet:
A single covalently bound molecule having N-F and N-H bondings is the NHF2 Lewis structure. The core molecule nitrogen shares three electrons with two fluorine atoms and one hydrogen atom to complete its octet.
What form does an NHF2 molecule take?Identify an NHF2 molecule's shape. Draw a drawing of it and specify the angles of its bonds. pyramidal with a 107 degree bond angle.
How is the Lewis structure determined?Finding the total amount of valence electrons is the first step. Step 2: Outline the molecule's skeletal structure. Step 3: Form each bond in the skeletal structure using two valence electrons. Step 4: Try to distribute the leftover valence electrons as nonbonding electrons in order to fill the atoms' octets.
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what is the mass of 7.00 moles of aluminum oxalate
Answer: Chemical Mole Gram Calculator. Chemical Formula: (Optional). Molar Mass: Weight: g, kg, ton, mg, ug, ng, pg, Carat[metric], Stone, Ounce(Oz), Grain, Pound
Missing: 7.00 | Must include: 7.00
Explanation:
