To create 3.3 l of a 0.118 m potassium chloride solution, the chemist needs to use 29g of kcl (KCl). Potassium chloride is a salt that has a metal-halogen link in it.
It is a salt with the chemical symbol KCl and a 1:1 composition of potassium cations and chloride anions. It has an odourless scent and a look that is colourless and crystalline. A compound or material can be halogenated through a chemical reaction in which one or more halogens are added.
potassium chlorides molarity is 0.118M.
3.3 L is the volume.
Considering that molarity(M) = mole/volume
KCL mole = 0.118*3.3
= 0.3894 mole
KCL's mass equals 0.894 * 74.55
KCL mass = 29g
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hydrated cobalt chloride consists of pink crystals. When it is heated in a test tube, it turns blue, and drops of liquid are seen at the top of the test tube. This reaction is reversible.
Suggest the identity of the drops of liquids and a way to test your answer.
The compound that is in the liquid is water.
What is the drop of liquid?We know that the compound cobalt chloride can be used to test for the presence of water. The reason why we can be able to use the compound to test for the presence of water is the fact that the color of the anhydrous and the hydrates salt is not the same.
The anhydrous salt is blue in color and that is why the heating of the hydrated salt would make it to turn blue while the hydrtaed compound is foud to be pink in color. Addition of water an removal of water is able to change the color of cobalt chloride.
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what is the N2H2 polarity?
The N2H2 polarity is non. it is a non - polar compound present in the globe.
A molecule or its chemical groups have an electric dipole moment with a negatively charged end and a positively charged end when they are polarity, which in chemistry is the separation of electric charge. Because the bonded atoms' electronegativity differs, polar compounds must have one or more polar bonds. If the bond dipoles cancel one other out via symmetry, molecules with polar bonds are not polar. Dipole-dipole intermolecular forces and hydrogen bonding are how polar molecules communicate with one another. Many physical characteristics, including as surface tension, solubility, and melting and boiling points, are based on polarity. The force with which an atom pulls an electron is not constant. The electronegativity of an atom refers to the strength of the "pull" it applies to its electrons. Fluorine, oxygen, and nitrogen atoms, as well as those with high electronegativities, pull on electrons more strongly than do alkali metals and alkaline earth metals and atoms with low electronegativities. This causes an unequal distribution of electrons among the atoms in a bond because electrons are attracted to the atom with the higher electronegativity.
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If molecules of hydrogen, nitrogen, oxygen and chlorine have the same kinetic energy which molecule will be moving the fastest?
Hydrogen molecules will move the fastest if their kinetic energies are equal to those of nitrogen, oxygen, and chlorine molecules.
Which element—oxygen or hydrogen—has more kinetic energy?Boltzmann and Maxwell have also examined the dispersion of gas speed, although this is outside the purview of this course. You may have noticed that for oxygen and hydrogen gas to share the same average kinetic at the same temperature, their average speeds must be 4 times greater than each other.
What molecules will travel more quickly?As the temperature increases, the particles amass kinetic energy and accelerate.. Both their mass and the temperature affect the particles' real average speed; heavier particles move slower than
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well, the astronaut finally wakes up because he hears two distinct alarms. one for high co2 and another for low pressure, but the suit has way too much oxygen. as he stumbles to the hab, he is facing both high co2 and high o2, but a lowered atmospheric pressure. if the atmospheric pressure inside the suit is now 0.5 atm (equivalent to an altitude on earth of 5500 m above sea level), then what low pressure symptoms could he be experiencing? this is separate from just the co2 and o2 levels.
The low atmospheric pressure symptoms could he be experiencing the headache, nausea, dizziness, loss of coordination.
The force exerted the surface by the air lies above the surface due to gravity is called as the atmospheric pressure. The air around you has some of the weight and the pressure against it is called as the atmospheric pressure. as he stumbles to the hab, he is facing both high CO₂ and high O₂, but a lowered atmospheric pressure. if the atmospheric pressure inside the suit is now 0.5 atm (equivalent to an altitude on earth of 5500 m above sea level), then low pressure symptoms could he be experiencing are :
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if the planet in question is the earth, at what temperature does the average translational kinetic energy of a nitrogen molecule (molar mass 28.0 g/mol ) equal that required to escape? use the radius of the earth is rp
If a planet is the earth, a nitrogen molecule's average translational kinetic energy, equivalent to the energy needed to escape, is 1.402*105K.
Nitrogen gas makes up about 80% of the Earth's atmosphere. An perfect gas's molecules have an average translational kinetic energy of 641. 7 × 10 − 23 J. the average translational kinetic energy of a molecule at 1000 K, where the vapours act optimally. Due to atomic nitrogen molecule's have high level of reactivity, elemental nitrogen typically exists as the molecular N 2, dinitrogen. Nitrogen is the seventh element on the periodic table between carbon and oxygen. It plays a significant role in amino acids. Nitrogen gas makes up about 80% of the Earth's atmosphere.
Conversions of kinetic energy
3/2*K*T = 1/2*m*V^2
T = 2*Mg*Rp/3NaK
T = 2*28*10^-3*9.8*6371*1000/3*8.31
T = 1.402*10^5k
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what type of intermolecular force is found between a) f2 and cl2 ? London dispersion force b) water molecules ? hydrogen bonds ?
London dispersion forces are the only intermolecular forces that exist between fluorine and chlorine because they are both non-polar covalent compounds.
What produces the dispersion forces in London?The coulombic interaction between instantaneous dipoles lead to London dispersion forces.All molecules (and atoms) exhibit dispersion forces, which are typically higher for heavier, more polarizable, and molecules with wider area areas.
By London forces, what do you mean?The intermolecular forces or attraction that hold molecules together are known as London forces.Although they are a vander waal's force, they are the only one found in substances without polar dipole molecules.
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Better Life Ind compound has infrared absorptions at the following frequencies: 3300 and 3385 cm-[ (both weak) and no band between 1600 and 1850 cm Suggest the likely functional group that may be preseni ester ketone carboxyl group Submit Answer Try Another Verslon Iten secondary amine alcohol ether aldchyde primary amine primary amide sacondary amide tertiary amine tertiary amide
The likely functional group present is primary amine, Better Life Ind compound has infrared absorptions at the following frequencies: 3300 and 3385 cm-[ (both weak) and no band between 1600 and 1850 cm Suggest the likely functional group that may be preseni ester ketone carboxyl group
There is no C=O in this compound because the IR signal for C=O is ~1700, So the following can't be present: ester, ketone, carboxyl group, aldehyde, primary amide, secondary amide, and tertiary amide , There is no -OH group because the IR signal for -OH is broad at ~3400, So the following can't be present: alcohol, Now the choices, we are left with are: primary amine, secondary amine, and tertiary amine .Note that the primary amine results in 2 bands, secondary amine results in only 1 band, and teritary amine results in no bands near ~3300. This represents the N-H stretching. The likely functional group present is primary amine
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A good definition of chemistry is: A. the science that seeks to understand what living organisms do by studying the molecules that make up the organism. B. the science that seeks to understand what the universe does by studying interactions of molecules with atoms. C. the science that seeks to understand the interactions of molecules for the sake of advancing human control over nature. D. none of the above E. the science that seeks to understand what matter does by studying what atoms and molecules do. The key to success in chemistry is: commitment practice all of the above curiosity mathematical skills
Option C) provides a useful definition of chemistry.
The science that strives to comprehend how molecules interact in order to improve human control over nature is a solid way to define chemistry. the branch of science that examines how molecules interact with atoms to provide insight into the workings of the cosmos.
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in calorimetry experiments we are able to determine the amount of heat exchanged in a chemical reaction or process by measuring the amount of heat lost or gained in the surroundings.
The heat generated by an exothermic process in liquid in a calorimeter is absorbed at the surface, raising the solution's temperature.
What is measured by a calorimetry experiment?Calorimetry is a technique used to gauge how much heat is produced or chemical adsorption.It is possible to tell whether a process is exothermic (helps release heat) or endothermic by detecting the changes in heat.
How is heat measured using calorimetry?Any time a liquid loses or receives energy, the temperature of the liquid changes.To quantify the number of energy change, the calorimeter monitors the mass of water as well as the temperature change.
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draw the product of the reaction between 1-pentyne and li in liquid nh3, then ch2i2/zn(cu).
The product of the reaction between 1-pentyne and li in liquid nh3, then ch2i2/zn(cu) results in the formation of 1-penetene.
Alkenes having the chemical formula C 5H are pentene. Each molecule's molecular structure consists of one double bond. There are six different compounds in this class, and they are distinguished from one another by the shape of the double bond and whether the carbon atoms are linked linearly or in a branching arrangement. Alpha-olefins include 1-pentene. Most frequently, 1-pentene is produced as a byproduct of the catalytic or thermal cracking of petroleum, or during the thermal cracking of hydrocarbon fractions to produce ethylene and propylene. Sasol Ltd. is the sole producer of 1-pentene on a commercial scale, and it uses the Fischer-Tropsch technique to extract it from petroleum. Cis-2-pentene and trans-2-pentene are the two geometric isomers of 2-pentene. Olefin metathesis uses cis-2-pentene. Two-methylbut-1-ene, three-methylbut-1-ene (isopentene), and two-methylbut-2-ene are the branching isomers (isoamylene). One of the three primary byproducts of deep catalytic cracking (DCC), which operates very similarly to fluid catalytic cracking, is isoamylene (FCC). Vacuum gas oil (VGO) is the main feedstock used by the DCC to create propylene, isobutylene, and isoamylene. The growth of the DCC, which is run very similarly to the FCC, has been driven by the increase in demand for polypropylene.
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the changing of a substance from a liquid into a vapor or gas is called
Answer: Boiling and Evaporation: Evaporation is the change of a substance from a liquid to a gas. Boiling is the change of a liquid to a vapor, or gas, throughout the liquid.
Explanation: Boiling and Evaporation: Evaporation is the change of a substance from a liquid to a gas. Boiling is the change of a liquid to a vapor, or gas, throughout the liquid.
Draw the Lewis structure for sulfur monoxide (SO) molecule
The Lewis structure is attached below:
What is the Lewis structure?Lewis structures also called electron dot structures, or Lewis electron dot structures, are diagrams that show the bonding between atoms of a molecule, as well as the lone pairs of electrons that may exist in the molecule.
The Lewis rule states that Hydrogen atoms form only single bonds and they are always at the ends of a sequence of atoms. Hydrogen often is bonded to carbon, nitrogen or oxygen. Oxygen atoms usually do not bond to each other, except for O2, O3, superoxides and peroxides.
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explain why you would expect the molar heat capacity at constant pressure of an ideal gas to be larger than the molar heat capacity at constant volume.
The thermal capacity under a certain pressure Since the substance expands and produces energy when heat is applied at a constant pressure, CP is greater than the heat capacity at constant volume CV.
Why does the first law of thermodynamics demonstrate that CP Cv R and that specific heat at constant pressure is greater than that at constant volume?In the first instance, the temperature of the gas must be raised with greater heat. Since it requires more energy to raise the temperature by one unit in the former situation, CP, or specific heat at constant pressure, is greater than CV, or specific heat at constant volume.
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find the energy of the photon that is emitted when the electron in a hydrogen atom undergoes a transition from the n
C)0.57 eV
E_photon = energy of the photon
E_i = energy of initial level
E_f = energy of final level
Then we take a look at our Energy Level Diagram for hydrogen. Look at the energy required for n = 7 and then n = 4.
E_photon = E_i - E_f
E_photon = (0.00 eV) - (-0.57 eV)
E_photon = 0.57 eV
Photon energy is the energy carried by a single photon. The amount of energy is directly proportional to the photon's electromagnetic frequency and thus inversely proportional to its wavelength. The higher the frequency of a photon, the higher its energy. The longer the wavelength of a photon, the lower its energy.
Photon energy can be expressed in arbitrary energy units. Commonly used units for expressing photon energy include the electronvolt (eV) and joules (and their multiples such as microjoules). One joule is equal to 6.24 × 1018 eV, so larger units may be more useful to express the energy of higher frequency, higher energy photons, such as photons. B. Gamma rays, as opposed to low-energy photons such as the optical and radio frequency regions of the electromagnetic spectrum.
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Question Millikan utilized specific numerical data gathered by: Select the correct answer below:
O JJ. Thomson
O John Dalton
O Ernest Rutherford
O all of the above
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Millikan utilized specific numerical data gathered by JJ. Thomson
The Nobel Prize in Physics was awarded to American experimental physicist Robert Andrews Millikan (March 22, 1868 – December 19, 1953) in 1923 for his work on the photoelectric effect and the measurement of the fundamental electric charge.
To ascertain the amount of electric charge that a single electron can hold, Millikan started a series of experiments in 1909. The first thing he did was chart the movement of charged water droplets in an electric field. The experiment was not precise enough to produce results that were persuasive, but the data did indicate that the charge on the droplets is a multiple of the elementary electric charge. His well-known oil-drop experiment, in which he substituted oil for water, produced more accurate results in 1910.
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Write short note on conductors and insulators
Explanation:
A conductor allows current to flow easily through it. Insulators don't allow current to flow through it. Electric charges are absent in insulator. Conductors are used in making electrical equipment.A conductor is that which easily allows the passage of current through it.
Example: Aluminium or any metal. An insulator is that which does not allow the passage of current through it.
Example: Rubber.
hope this helps you
Conductors are materials that allow electricity to flow freely through them. They are typically made of metals such as copper, aluminum, and gold. On the other hand, insulators are materials that do not allow electricity to flow through them easily. Examples of insulators include rubber, glass, and plastic. Conductors are often used in electrical wiring, while insulators are used to protect people and buildings from electrical currents. It is important to use the appropriate materials for conducting or insulating electricity to ensure safety and efficiency.
Which of the following solutions do they have the maximum osmotic pressure and why?
1) 0.1 m ( molal conc.) glucose
2) 0.1 m sucrose
3) 0.5 m glucose
4) 0.2 m sucrose
Since NaCl produces the most ions, it will exhibit the highest osmotic pressure.
Osmotic pressure: What is it?
The osmotic pressure is the least amount of pressure that must be given to a solution in order to block the passage of the solution's pure solvent through a semipermeable membrane.
How is osmotic pressure determined?
Temperature and concentration both have an impact on osmotic pressure. Temperature and solute concentration both have an impact on how much pressure is generated when water moves through a membrane. Osmotic pressure rises with temperature and concentration.
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100 ml of a 0.300 m solution of agno3 reacts with 100 ml of a 0.300 m solution of hcl in a coffee-cup calorimeter and the temperature rises from 21.80 °c to 23.20 °c. assuming the density and specific heat of the resulting solution is 1.00 g/ml and 4.18 j/g ∙ °c, what is the mass of the reaction solution?
Mass of the reaction solution ΔH°rxn = 39013.33 J/mol = 39.013 kJ/mol.
Q = m.c.ΔT,
m is the mass of the solution (m of the solution = density of the solution x volume of the solution = (1.0 g/mL)(200 mL) = 200 g.
c is the specific heat capacity of the solution (c = 4.18 J/g∙°C).
ΔT is the difference in the T (ΔT = final temperature - initial temperature = 23.20 °C - 21.80 °C = 1.4 °C).
Q = m.c.ΔT = (200 g)(4.18 J/g∙°C)(1.4 °C) = 1170.4 J.
ΔH°rxn = Qrxn/(no. of moles of AgNO₃).
Molarity (M) is defined as the no. of moles of solute dissolved in a 1.0 L of the solution.
M = (no. of moles of AgNO₃)/(Volume of the solution (L)).
no. of moles of AgNO₃ = (M)(Volume of the solution (L)) = (0.3 M)(0.1 L) = 0.03 mol.
ΔH°rxn = Qrxn/(no. of moles of AgNO₃) = (1170.4 J)/(0.03 mol) = 39013.33 J/mol = 39.013 kJ/mol.
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a mixture of ideal gases having a total mass of 28.3 g is placed in a 8 l vessel at 275.0 k. the equilibrium pressure is measured to be 1.8 bar. calculate the average molar mass of the gas mixture.
average molar mass of the gas mixture is 45.09 g/mol
Calculation :
We have ,
Total mass = 28.3 g , volume = 8L
Temperature = 275 k , pressure = 1.8 bar
first we have to find mole (Total) of gases .
PV =NRT
(1.77)*(8) = N(total)*(0.082057)*(275K)
N(total) = 0.6276 mole
Now, we know,
(mole) n = mass/molar mass
n (total)= Total mass/average molar mass
Average molar mass = Total mass/n total
= 28.3 g/0.6276 mole
Average molar mass = 45.09 g/mol
In chemistry, the molar mass of a chemical compound is defined as the mass of a sample of that compound divided by the amount of substance. The amount of a substance is the number of moles of that sample measured in moles. Molar mass is mass, not a molecular property of a substance. Molar mass is the average of many instances of a compound, which often differ in mass due to the presence of isotopes. Most commonly, molar mass is calculated from standard atomic masses, so it is a global average and a function of the relative isotopic abundances of constituent atoms on Earth. Molar mass is useful for converting between the mass of a substance and the quantity of a bulk substance.
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How does a quantity differ from a unit? Use two examples to explain the difference.
A crowd is something that has size, size, or quantity, and units are a kind of measure.
Give examples?
Example 1: The quantity represented by a teaspoon of volume, teaspoon is a unit and volume is a quantity.
Example 2: If there are 236 kg, the 236 is the quantity while kg is the units.
What is a unit?
A unit is a single complete part of something, like a building block. In math classes, you may take a unit of algebra before taking another unit of geometry. There are also units of measurement such as inches and miles.
The word unity comes from mathematics, but has branched out to refer to a single thing that is part of a larger one. Each apartment in the building is a unit. A unit can also be a small group that fits into a larger social organization, such as a military unit or a family unit. In both cases the units are part of a larger whole.
Therefore, A crowd is something that has size, size, or quantity, and units are a kind of measure.
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hich of the following excited state electron configurations of C would require the longest wavelength of light to produce? O 15²2s²2p²45? 1s22s22p13p1 O1s22s22p13s1 1s22s22p2
For such excited state 1s22s22p13s1, the greatest wavelength is necessary. The Bohr model proposes that energy is absorbed by an atom, which causes it to jump from one energy level to another.
What does a Bohr model simply mean?A structural representation of an atom is the Bohr Model. Niels Bohr, a physicist, put forth the hypothesis in 1913. According to this idea, electrons orbit the atomic nucleus within an atom in discrete circular shells. The atomic planetary model is another name for the model.
What constitutes Bohr's model's fundamental ideas?Answer: 1) Elections move in circular, constant-energy orbits around the nucleus. 2) The only stable electron orbits are those in which h/2Pi is a multiple of the electron's angular momentum. 3) An electron moving of one orbital to another causes a photon to be either emitted or absorbed.
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write the equilibrium expression for the base ionization of the weak base of methylamine, ch3 nh2 . hint: first write the balanced chemical equation for the ionization of ch3 nh2 in water.
CH3NH2 + HOH ==> CH3NH3^+ + OH^-Which molecule/ion accepts a proton. That is the base. Which molecule/ion donates a proton. That is the acid.
A stable subatomic particle known by the symbol for "proton"
e elementary charge, p, H+, or 1H+ having a positive electric charge. Its mass is 1,836 times greater than an electron's mass and just a little bit less than that of a neutron (the proton–electron mass ratio). "Nucleons" refers to protons and neutrons together, each of which has a mass of roughly one atomic mass unit (particles present in atomic nuclei).
Each atom. has a nucleus. that contains one or more protons. In order to keep the atomic electrons bound, they offer the central attractive electrostatic force. An element's defining characteristic, known as the atomic number, is the number of protons in the nucleus (represented by the symbol Z)
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what is energy coupling a description of the energetic relationship between the reactants and products in an
When one reaction or system drives another with the energy it produces, this is known as energy coupling. Chemiosmosis is the diffusion of ions across a membrane that is semi-permeable.
Chemiosmosis is the passage of ions down their electrochemical gradient over a structure bound to a semipermeable membrane. The production of adenosine triphosphate (ATP) by the passage of hydrogen ions (H+) across a membrane during photosynthesis or cellular respiration is a significant illustration.
When ions move through a channel, an ion gradient with potential energy can be employed to drive chemical reactions (red).
A gradient of protons' electrochemical concentrations across a membrane can be used to produce ATP. Hydrogen ions, or protons, will diffuse from a location of high proton concentration to a region of low proton concentration. The term "chemiosmosis" refers to a process that is similar to osmosis and involves the passage of water across a selective membrane.
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What is the third quantum number of a 2s² electron in phosphorus, 1s²2s²2p63s²3p³? O A. m₁ = 1 OB. m/= 2 O C. m = -1 O D. m/= 0
The third quantum number of a 2s² electron in phosphorus, m = 0.
The correct option is D.
What is a quantum number?Quantum numbers are the set of numbers used to express the location and energy of an electron in an atom.
There are four types of quantum numbers;
principal quantum number, nazimuthal quantum number, l; magnetic quantum number;and spin quantum numberThe electronic configuration of phosphorus is 1s²2s²2p63s²3p³.
The third quantum number m has values of -l to +l.
For phosphorus, l is 0. Hence, m is also 0.
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How do you rearrange the Arrhenius equation to solve for T2?
ln(k2/k1)=Ea/R(1/T1-1/T2) [or should it be ln(k2/k1) = Ea/R(1/T2-1/T1)?]
Info given in the question:
(k2/k1)=2
Ea= 3.87*10^4 J/mol
R= 8.314 J/mol*K
T1=293K
The Arrhenius equation is given by k = Ae^(-Ea/RT), where A is the frequency or preexponential component and e^(-Ea/RT) is the percentage of collisions with energy sufficient to break through the activation barrier at temperature T.
The Arrhenius equation in physical chemistry is a formula for the temperature dependence of reaction rates. Based on the research of Dutch chemist Jacobus Henricus van 't Hoff, who had noted in 1884 that the van 't Hoff equation for the temperature dependence of equilibrium constants suggests such a formula for the rates of both forward and reverse reactions, Svante Arrhenius proposed the equation in 1889.
This equation has numerous and significant applications in calculating the energy of activation and the rate of chemical reactions. Arrhenius explained and justified the formula using physical principles. The best way to view it right now is as an empirical relationship.
It can be used to simulate a wide range of thermally induced processes and reactions, including the temperature variation of diffusion coefficients, the population of crystal vacancies, creep rates, and many more. The 1935-created Eyring equation also explains the connection between rate and energy.
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which of the following are spontaneous processes? 1. ice melting at 1atm and 298 k (assume only ice is initially present). 2. heat flowing from a hot object to a cold object. 3. an iron bar rusting.
The following are spontaneous processes are : 1. ice melting at 1atm and 298 k (assume only ice is initially present). 2. heat flowing from a hot object to a cold object. 3. an iron bar rusting.
The spontaneous process is the process which occur without the outside source and within the system. so, the spontaneous process is that occurs by its own without any external source of energy from the out side . the given process are :
ice melting at 1atm and 298 k (assume only ice is initially present) heat flowing from a hot object to a cold objectan iron bar rustingThus, These all given process are the spontaneous process. which occurs by its own without any external source.
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Question 2 Consider the Lewis structure of RnCl2: What is its electron geometry? What is its molecular geometry?
The Electron geometry is trigonal bipyramid. molecular geometry is Liner
3orbitals are used to keep loan pairs on Rn
2 orbital are used to form two pi bonds in the chlorine
Total hybridized orbital needed = 5
i.e. S,3p,1s
Hybridization = Sp^3d.
Electron geometry = trigonal bipyramid
molecular geometry = Liner
We need to understand the Lewis electron dot structure in order to identify the forms of molecules. The Lewis hypothesis is the initial step in predicting molecular shapes, even though it does not itself specify how molecules would look. We can distinguish between bond pairs and lone pairs with the aid of the Lewis structure. We next use the Lewis structure to determine the molecular geometry and the electron-group geometry using the valence-shell electron-pair repulsion (VSPER) theory.
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Which of the following solutions have lowest freezing point
A) 0.1 M NaCl B) 0.001 M Nacl C) 1M Nacl D) 0.001 M Nacl
A solute's solution's molarity directly relates to the freezing point depression; the higher the molarity, the greater the depression. So, as the temperature drops. First, 0.001M NaCl freezes, 1M NaCl freezes.
Molarity: What is it?
The moles of solute every liter of solution is measured as molarity. For instance, when table salt is dissolved in water, both salt and water serve as the solute.
What does a solution's molarity mean?
Molarity (M), which is determined by dividing the solute's mass in moles by the volume of the solution in liters, is the most widely used unit to express solution concentration: liters of solution/moles of solute equals M. One liter of a solution with a 1.00 molar concentration (1.00 M) contains 1.00 moles of solute.
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if 11.65 ml of 0.595 m koh is required to titrate the unknown acid to the equivalence point, what is the concentration of the unknown acid?
The concentration of the unknown acid is 6.93175 divided by the volume of the unknown acid in mL and the unit is M (mole/liter)
The formula for volumetric analysis can be given as follows;
[tex]\frac{C_{a}V_{a} }{C_{b}V_{b} } = \frac{N_{a} }{N_{b} }[/tex]
At the equivalence point, [tex]N_{a} = N_{b}[/tex]
Therefore, [tex]C_{a} V_{a} = C_{b} V_{b}[/tex]
[tex]C_{a}[/tex] (concentration of unknown acid) = [tex]\frac{C_{b}V_{b} }{V_{a} }[/tex]
[tex]C_{a}[/tex] represents the concentration of unknown acid in mL
[tex]C_{b}[/tex] (concentration of KOH) = 0.595M
[tex]V_{b}[/tex] (volume of KOH) = 11.65 mL
[tex]C_{a}[/tex] = 11.65 × 0.595 / [tex]V_{a}[/tex] = (6.93175 / [tex]V_{a}[/tex]) M
Hence, the concentration of the unknown acid is calculated to be 6.93175 divided by the volume of the unknown acid in mL if 11.65 ml of 0.595 KOH is required for titration.
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Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. In this reaction, dark silver sulfide, au2s, covers the surface of silver. When silver is polished, this coating of silver sulfide can be removed from the surface. This makes the silver shiny again. Enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient. ).
The balanced equation with correct coefficients is represented as follows:
2Ag(s) + 1H₂S(g) → 1Ag₂S(s) + 1H₂(g)
The chemical reaction taking place between silver and hydrogen sulfide is represented as follows:
2Ag(s) + 1H₂S(g) → 1Ag₂S(s) + 1H₂(g)
When silver metal reacts with hydrogen disulfide gas, it yields silver sulfide and hydrogen gas is liberated along with it.
This reaction is termed as single displacement or replacement reaction.
The coefficients in an order are 2,1,1 and 1.
To learn more about chemical reaction check the link below:
https://brainly.com/question/11231920
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