Since Potassium atom is made up of 19 electrons, that is, its atomic number is 19; therefore the electronic configuration that represents potassium in an excited state is 1s²2s²2p⁶3s²2p⁶4s⁰4p¹
The electron configuration that represents an excited state for a potassium atom is 2-8-7-1. Option (1) is correct.
Potassium is a chemical element with the symbol K (from Neo-Latin kalium) and atomic number 19. The electron configuration of potassium is 1s²2s²2p⁶3s²3p⁶4s¹.
The excited state of potassium would be when one of the 4s electrons jumps to a higher energy level (orbital) such as 4p, 5s, 5p, etc. resulting in an electron configuration of 2-8-7-1.
So, the option (1) 2-8-7-1 represents the excited state for a potassium atom.
The distribution of electrons in an element's atomic orbitals is described by its electron configuration. Atomic electron configurations follow a standard notation in which all electron-containing atomic subshells are arranged in a particular order, with the number of electrons they hold written in superscript.
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Classify these molecules as polar or nonpolar.
Drag each item to the appropriate bin.
> View available hint(s)
BCl3 CH3NH2 CCL4 H2 HCL H2O
Polar?
Non polar?
Sort these chemicals into polar or nonpolar groups. Drag every thing to the proper bin. View available hints for BCl3 CH3NH2 CCL4 Hydride Hci Pure water.
What distinguishes a molecule as polar or nonpolar?Result for an image Sort these chemicals into polar or nonpolar groups. Drag every thing to the proper bin. View hint(s) available BCl3 CH3NH2 Colchicine H2 Hci H2O Polar? Null polarity
Non-polar molecules lack unshared electrons and are symmetrical. Polar molecules were asymmetric, either having atoms with differing electronegativities bound together or having lone electron pairs on a core atom.
How can you know by looking at a molecule if it is polar or nonpolar?More importance is placed on the atoms' arrangement. Let's examine the symmetric molecules now. Every particle that.
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PLEASE HELP ME WITH THIS QUESTION I NEED IT
The correct balanced equation for the reaction between zinc and dihydrogen sulfate is:
Zn + H₂S -> ZnS + H₂ (Option C)
How do I balance the equation?We can balance chemical equation by simply obeying the law of conservation of matter.
The law of conservation of matter which states that matter can neither be created nor destroyed during a chemical reaction but can be transferred from one form to another.
Now, we shall write the balance equation as shown below:
Zinc => Zn Dihydrogen sulfate => H₂SZinc + Dihydrogen sulfate ->
Zn + H₂S ->
Zinc displaces H to produce H₂ as shown below:
Zn + H₂S -> ZnS + H₂
Since the atoms of the elements on both sides of the equation are equal, then the equation is balanced
Thus, the correct answer is: Zn + H₂S -> ZnS + H₂ (Option C)
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refers to the hydrocarbon that contains one or more double or triple bonds between two carbon atoms called
Alkynes have a carbon-carbon triple bond, whereas alkenes only have a carbon-carbon double bond. The generic molecular formula CnH2n identifies alkenes.
Alkenes have double bonds, right?Alkenes are hydrocarbons with double bonds between carbon atoms. When it comes to molecules with one double bond, their usual formula is CnH2n (and no rings). Following the initial moniker for ethene, olefiant gas, alkenes are also referred to as olefins.
What do GCSE alkenes cover?Because they are substances made up exclusively of hydrogen and carbon, alkenes are unsaturated hydrocarbons. They are unsaturated because they have two less hydrogen atoms than the comparable alkane due to the presence of a C=C double bond.
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What is the correct IUPAC name for the following compound? CH3 CH CH2C-CCH2CH (Compound Figure) A) 3-methyl-4-ethyl-3-hexen-6-ol B) 4-ethyl-3-methyl-3,6-hexenol C) 3-ethyl-4-methyl-3-hexen-1-ol D) 3-methyl-4-(2-hydroxyethyl)-3-hexene E) 3-(2-hydroxyethyl)- 3-methyl-3-hexene
The IUPAC name for the given compound is : 3-ethyl-4-methyl-3-hexen-1-ol
CH₃ - CH₂ - C = C - CH₂ - CH₃
| |
CH₃ CH₂CH₂OH
The given compound is :
CH₃ - CH₂ - C = C - CH₂ - CH₃
| |
CH₃ CH₂CH₂OH
The IUPAC name is 3-ethyl-4-methyl-3-hexen-1-ol.
The IUPAC name in the organic compound is the systematic approach for the naming of the organic compound. The IUPAC is the international union of the pure and the applied chemistry. There are some rule in the IUPAC to name the compounds. In the IUPAC on the naming of the compound the first rule is to find the longest chain of the carbon.
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20 mL of a saturated solution of KNO3 at 50 degrees Celsius is cooled to 20 degrees Celsius. Approximately what mass of solid will precipitate from this solution?
Answer:
Approximately 8.8 grams of solid KNO3 will precipitate from the solution when it's cooled from 50 degrees Celsius to 20 degrees Celsius.
Explanation:
The solubility of a solid in a liquid typically decreases as the temperature decreases. As a result, when a saturated solution is cooled, some of the solid may precipitate out of the solution.
The solubility of potassium nitrate (KNO3) in water at 20 degrees Celsius is around 42 grams per 100 milliliters of water. At 50 degrees Celsius the solubility is around 86 grams per 100 milliliters of water.
To find the mass of solid that will precipitate, we can use the difference between the solubility of KNO3 at 20 degrees Celsius and at 50 degrees Celsius.
At 20 degrees Celsius, the solubility of KNO3 is 42 g/100 mL, and at 50 degrees Celsius, the solubility is 86 g/100 mL.
So, the difference between the solubility of KNO3 at 20 degrees Celsius and at 50 degrees Celsius is 86 - 42 = 44 grams per 100 milliliters.
Since we have 20 mL of a saturated solution, we can calculate the mass of the precipitate by multiplying the difference in solubility by the volume of the solution:
44 g/100 mL * 20 mL = 8.8 grams.
So, approximately 8.8 grams of solid KNO3 will precipitate from the solution when it's cooled from 50 degrees Celsius to 20 degrees Celsius.
Please note that this is an approximate calculation and the actual amount of precipitate may vary depending on other factors such as impurities and the specific conditions of the experiment.
A sample of an iron-containing compound is 22.0% ironm 50.2% oxygen, and 27.8% chlorine by mass. What is the empirical formula of this compound?
FeCl₂O₈ is just the empirical composition for this chemical, according to the claim made.
What exactly are empirical formulas?An molecular formula is a compound's chemical formula that only specifies the ratios of the elements it contains and not the precise number or atomic arrangement. This would be the compound's element with the least whole number ratio.
In 100 g we have,
22 g of iron or 22/56 moles of iron equals.393 moles.
50.2/16 or 3.1375 equals 50.2 moles of oxygen.
Cl =27.8 / 35.5 = 0.7830
To obtain the ratios of something like the MOLES we obtain, divide by the smallest.
Fe = 1
O = 7.98
Cl = 2
Empirical formula is FeCl₂O₈
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FILL IN THE BLANK At 298 K and 1 atm, bromine is a liquid with a high vapor pressure, whereas chlorine is a gas. This provides evidence that, under these conditions, the forces among Br2 molecules are _______ than those among Cl2 molecules
Answer: stronger
Explanation: At higher temperatures, Br2 takes more energy to break apart the molecules. Therefore, the intermolecular forces, most likely london dispersion, will need more energy. Cl2 has weaker forces and takes less to break it apart.
Which liquid is more us cous: evaporated milk or condensed milk? 2. To which of type of magma can you liken the evaporated milk or condensed milk? Explain your answer
Answer correctly
Answer:
i think that the answer is evaporated milk
lysine is a compound composed of carbon, hydrogen, nitrogen, and oxygen. when 1.50 g of lysine i burned, 2.72 g of carbon dioxide, 1.29 g of water, and 0.287 g of nitrogen gas are produced. what is the empirical formula of lysine? if the molar mass of lysine is 146.19 g/mol. what is the molecular formula?
The empirical formula for lysine, which demonstrates the chemical formula, is C₁₈H₄₂N₆O₆
What is nitrogen?Nitrogen, sometimes known as N, is an element that has no taste or color. Nitrogen is present in the air we breathe, the water we drink, and the ground beneath our feet. In reality, nitrogen is the most common element in the atmosphere of the Earth, accounting up 78% of it. Nitrogen is essential for the synthesis of amino acids, proteins, nucleic acids, and other essential elements. Stone fruit trees require an appropriate supply of nitrogen to grow and produce fruit every year. The primary types of nitrogen that are absorbed by fine roots are ammonium or nitrate.
What nitrogen is used for?On nitrogen, the chemical industry depends. It is used to make fertilizers, dyes, nylon, nitric acid, and explosives. To make these products, nitrogen must first be coupled with hydrogen to make ammonia.
Molecular Formula is calculated using following formula,
Molecular Formula = n (Empirical Formula) ----- (1)
Calculating n;
n = Molecular Weight / Empirical Formula Weight --- (2)
Empirical formula weight = (1.50×3) + (2.72×7) + (1.29×1) + (0.287×1)
Empirical formula weight = (4.5) + (19.04) + (1.29) + (0.287)
Empirical formula weight = 25.117
Putting values in Eq. 2,
n = 146.19 / 25.117
n = 6
Putting Value of n and Empirical Formula in Eq. 1,
Molecular Formula = 6 × C₃H₇NO
Molecular Formula = C₁₈H₄₂N₆O₆
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Which of the following gases has the lowest average speed at 25 degree C? a. H2Se b. PH3 c. C2H6 d. F2
Since H2Se has the biggest molar mass of the gases, it has the lowest average velocity.
In chemistry, what does a molar mass mean?A substance's mass expressed in grams per mole is known as its molar mass. As seen in this video, the molar mass of a substance may be calculated by adding the molar masses of the material's component atoms.
Are the atomic and molar masses equivalent?Atomic mass is the mass of a single compound unit, whereas molecular mass refers to the mass of a single mole of a compound. In essence, atomic mass is the mass of the atom, while molar mass is the average mass of the compound's constituent parts.
Molar mass of H2Se = 78.98 + 2(1) = 80.98 g/mol
PH3 = 30.99758 + 3(1) = 33.99758 g/mol
C2H6 = 12(2)+6(1) = 30 g/mol
F2 = 37.997 g/mol
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Use dimensional analysis, to calculate how many moles of nitrogen monoxide are produced if 13 moles of oxygen gas are reacted.
Number of moles of Nitrogen monoxide produced when 13 moles of of oxygen is reacted is 26 moles.
Dimensional analysis in chemical reaction means equating both sides of the equation and deriving relationships, so that we can calculate the required quantities.
Nitrogen and oxygen in the air, while events like lightening reacts together to form Nitrogen monoxide. The reaction is as follows.
N₂ + O₂ ------- NO
By equating the reaction we get
N₂ + O₂ ------- 2NO
1 mole of nitrogen reacts with one mole of oxygen to get 2 moles of Nitrogen monoxide.
So when 13 moles of oxygen reacts 2× 13 moles of Nitrogen monoxide is formed. That is 26 moles.
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Help help help pleasee
17. (04.03 mc)
describe the characteristics of a double replacement reaction, how it is identified, and types of compounds
in the reactants and products. give an example in your response. (10 points)
The Double displacement reaction is the reaction in which the reacting substances react and exchange the ions and forms the new product.
The The Double displacement reaction is the reaction in which the reacting substances react and exchange the ions and forms the new product. The positive ions exchange the negative ions. The general examples is given as :
A⁺B⁻ + C⁺D⁻ ----> A⁺D⁻ + C⁺B⁻
In the double displacement reaction one of the product is :
The precipitate , The water or A gas. The example is :AgNO₃(aq) + NaCl(aq) ----> AgCl(s) + NaNO₃(aq)
HNO₃(aq) + KOH(aq) ----> KNO₃(aq) + H₂O(l)
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a compound with a molecular mass of 56.104 grams is found to be 86% carbon. the rest of the compound is hydrogen. find its molecular formula.
This compound's empirical formula may be used to get its molecular formula, which is C4H8 or we can say that Butene. It is an alkene and is sometimes referred to as butylene. An acyclic alkene with four carbon atoms. It is the simplest alkene to exhibit (E/Z)-isomerism, or the property of having two geometric isomers, cis-but-2-ene and trans-but-2-ene.
The chemical is classified as a hydrocarbon since it exclusively contains carbon and hydrogen atoms. Since carbon makes up 86% of the total, hydrogen makes up 14%.
The compound's molecular weight, 56.104 grams, is provided.
86 g * 1 mol/12 g = 7 moles of C.
1 mol/1 g Equals 14 moles of H, or 14 grams.
The mole ratio of C:H may be expressed as follows:
"Moles of C/Moles of H" = "7/14=1/2"
As a result, while its chemical formula is C4H8, its empirical formula is CH2.
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electron affinity tends to an. increase across a period and decrease down a group. b. decrease across a period and decrease down a group. c. decrease across a period and increase down a group. d. increase across a period and increase down a group.
Electron affinity increases going left to right across a period because of increased nuclear attraction.
What is the definition of electron affinity?The amount of energy released when an electron is added to a neutral atom to create a negatively charged ion is known as electron affinity in chemistry. Only a few chemical elements, mostly the halogens, have values for the electron affinities of their atoms since it is difficult to test these properties.
What increases electron affinities?The atom's nucleus becomes increasingly positively charged as the number of protons increases. The stronger the positive charge, the more the atom's nucleus and electrons are drawn together. As a result, the nucleus is able to hold the electrons more tightly, enhancing electron affinity.
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A sealed flask contains neon, argon, and krypton gas. if the total pressure in the flask is 3.782 atm, the partial pressure of ne is 0.435 atm, and the partial pressure of kr is 1.613 atm, what is the partial pressure of ar?
multiple choice question.
a)
Ar's partial pressure is 1.734 atm. if the gases neon, argon, and krypton are present in a sealed flask. If the flask's overall pressure is 3.782 atm, ne's partial pressure is 0.435 atm, and kr's partial pressure is 1.613 atm,
The partial pressure formula: what is it?One of two methods can be used to compute partial pressures: 1) Use PV = nRT to calculate the individual pressure of each gas in a mixture. 2)Determine the proportion of pressure from the total pressure that may be assigned to each individual gas by using the mole fraction of each gas.
Why is partial pressure significant, and what is it?Each gas in a mixture adds to the overall pressure of the mixture. This portion represents the pressure. The pressure a gas would have if it were in its own volume and at its own temperature is known as the partial pressure.
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how does the net ionic equation for a reaction involving a weak acid or a weak base differ from one that involves only strong acids and bases?
The net ionic equation for a reaction involving a weak acid or a weak base is different from one that involves only strong acids and bases because weak acids and bases do not fully dissociate in water.
What is the difference between weak and strong acids/base in an ionic equation?Only a small fraction of the weak acid or weak base molecules will actually participate in the reaction as ions. This is in contrast to strong acids and bases, which dissociate completely in water and will therefore be present as ions in the net ionic equation. The net ionic equation for a reaction involving a weak acid or a weak base will therefore include the weak acid or weak base in its molecular form, while the strong acid or strong base will be present as ions. Additionally, in the net ionic equation of a reaction involving a weak acid or weak base, the acid or base is often on both sides of the arrow, as a chemical species and as its conjugate acid or base.
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Carbon monoxide is colorless, odorless and tasteless.
A. True
B. False
Answer: A. True
Explanation:
Carbon monoxide (CO) is a colorless, odorless, and tasteless gas. It is produced by the incomplete burning of fuels such as natural gas, propane, oil, wood, and coal. It has no smell, taste, or color, and it can be difficult to detect, which is why it can be dangerous. Carbon monoxide can cause symptoms such as headache, dizziness, nausea, and fatigue, and can be fatal if inhaled in large quantities. It's important to have a Carbon monoxide detector in homes and buildings to detect any possible leakage.Answer:
Explanation:
S0lution:- (A)TRUE, Carbon monoxide(CO) is a colorless,odorless and tasteless toxic gas.it was first discovered by de Lassone it consists of covalent bonds.With stoichiometry. Determine the mass of hydrochloric acid (HCI) that will react with 20.0 g of calcium carbonate (CaCO₃) to produce carbon dioxide, water and calcium chloride.
As per the given balanced reaction, 2 moles or 73 g of HCl reacts with one mole or 100 g of calcium carbonate. Then mass of HCl required to reacts with 20 g of calcium carbonate is 14.6 g.
What is calcium carbonate ?Calcium carbonate is an inorganic compound formed by passing carbon dioxide gas through quick lime or calcium hydroxide. It reacts with HCl to give calcium chloride.
molar mass of HCl = 36.5 g
mass of 2 moles = 36.5 × 2 = 73 g
molar mass of calcium carbonate = 100 g
100 g of calcium carbonate requires 73 g of HCl.
Mass of HCl required to completely react with 20 g of calcium carbonate is calculated as follows:
Mass of HCl = 20 × 73 /100 = 14.6 g
Therefore, mass of HCl required by 20 g of calcium carbonate is 14.6 g.
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Which statement best describes an O3 molecule (Figure)? A. Each atom in ozone is connected to another atom by a bond having a bond order of 1.5. B. The double bond in ozone switches back and forth between the two outer oxygen atoms. C. An ozone molecule contains one single bond and one double bond.
The double bond in the ozone molecule switches back and forth between the outer oxygen atoms.
Three oxygen molecules combine to form the odourless, colourless gas known as ozone, which occurs naturally in the atmosphere. Both the upper atmosphere of the Earth, known as the stratosphere, and the lower atmosphere, known as the troposphere, can contain it. The ozone molecule's double bond alternates between the outer oxygen atoms. Resonance is the cause of this. The two primary resonance structures of ozone each contribute equally to the molecule's overall hybrid structure. The 18 valence electrons needed on the oxygen atoms are represented by all structures: six in three bonds and twelve as lone pairs.
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Homotopic Protons Definition
Homotopic protons are the protons that are identical. Two protons are said to be homotopic if on replacement of two protons with another group (X) produces two similar or indistinguishable molecules. For example, in ethane molecule, all the protons are homotopic.
Yes, that is correct. Homotopic protons are protons that are chemically identical. They are protons that are located in the same chemical environment.
They have the same chemical shift values in NMR spectroscopy. They are also known as chemically equivalent protons. Homotopic protons will produce only one signal in the NMR spectrum. In contrast, heterotopic protons are protons that are chemically different and will produce different signals in the NMR spectrum. This distinction is important in the analysis of NMR spectra, as it allows for the identification of different types of protons in a molecule and can provide information about the structure and conformation of the molecule.
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The complete question is -
Homotopic Protons Definition
Homotopic protons are the protons that are identical. Two protons are said to be homotopic if on replacement of two protons with another group (X) produces two similar or indistinguishable molecules. For example, in ethane molecule, all the protons are homotopic. State whether true or false.
Calculate the volume in milliliters of a 2.09 M silver nitrate solution that contains 400.mmol of silver nitrate AgNO3 . Round your answer to 3 significant digits.
The volume of the solution is 190ml.
To find the volume of a solution, we can use the formula: V = n/C, where V is the volume, n is the number of moles, and C is the concentration of the solution.
Step 1: Convert the number of millimoles of AgNO3 (400mmol) to moles by dividing by 1000. n = 400mmol/1000 = 0.4 moles
Step 2: Substitute the moles and concentration of the solution into the formula. V = 0.4 moles / 2.09 M = 0.19 moles
Step 3: Convert the volume to milliliters by multiplying by 1000. V = 0.19 moles * 1000 ml/mol = 190 ml
Hence we got the volume of the solution is 190 ml.
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in chromatography, components of a mixture spend some time absorbed in a stationary phase and some time dissolved in a mobile phase. in terms of intermolecular forces and polarity of the molecules, explain how the components can be separated with these two phases
The two separate "phases" that make up chromatography are the mobile phase, which is the solvent that passes through the paper transporting various compounds, and the stationary phase. The stationary phase does not pass through the paper; it is contained there.
What is a chromatography?Chromatography is a technique for separating the components of a mixture. To begin the process, the mixture is dissolved in a substance known as the mobile phase, which then carries it through a substance known as the stationary phase. Chemical analysis uses chromatography, a laboratory technique, to separate a mixture into its component parts. The stationary phase is a material that is fixed in a system, and the mobile phase, which is a liquid solvent, dissolves the mixture and carries it through that system.
Why is chromatography important?Chromatography is the most used separation process in chemical laboratories where it is used for analysis, isolation, and purification. It is frequently used in both small- and large-scale production in the chemical process sector.
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virial theorem the li atom has a nucleus with a 3e positive charge, which is surrounded by a full 1s shell with two electrons, and a single valence electron in the outer 2s subshell. the atomic radius of the li atom is about 0.17 nm. using the virial theorem, and assuming that the valence electron sees the nuclear 3e shielded by the two 1s electrons, that is, a net charge of e, estimate the ionization energy of li (the energy required to free the 2s electron). compare this value with the experimental value of 5.39 ev. suppose that the actual nuclear charge seen by the valence electron is not e but a little higher, say 1.25e, due to the imperfect shielding provided by the closed 1s shell. what would be the new ionization energy? what is your conclusion?
The conclusion is that the energy level of an atom is the energy that an electron possesses while it is in the ground state since the new ionization energy is 1.26. (not excited). The electrons jump to the following or different energy levels when they become excited.
What is meant by ionization energy?The amount of energy needed to remove one electron out of an isolated molecule or atom is known as ionization energy, also known as ionization potential, both chemistry and physics. By losing or acquiring electrons, it's the process by which an atom or molecule gains a positive or negative charge. Ions are the resultant species that are capable of carrying charges. The negative charges species are referred to as anions, whilst the positive charge species are referred to as cations.
What's the first ionization energy?The initial ionization energy is what it takes to generate one mole of gaseous ions, each having a charge of 1+, from one mole or neutral gaseous atoms by removing a most loosely held electron.
I= 13.60 Z^2/n^2
Where:
I= ionization potential
Z= effective nuclear charge
n= energy level
Z= √In^2/13.60
Z= √ 5.39×2^2/13.60
Z = 1.26
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what is characteristic of an aqueous solution of hno3? group of answer choices it conducts electricity. with the addition of phenolphthalein, it turns pink. it produces oh- in solution. it turns litmus blue.
Nitric acid (HNO3) is a colorless, fuming, and extremely corrosive liquid with freezing and boiling points of 42 and 181 degrees Celsius, respectively. that is a popular laboratory reagent and an important industrial.
HNO3 undergoes what kind of reaction?Neutralization is a chemical process that happens when an acid is put to a base. Nitric acid, HNO3, reacting with the basic potassium hydroxide, KOH, is one example.
Is HNO3 acidic when dissolved in water?Acids such as hydrochloric acid (H C l), nitric acid (H N O 3), and others exhibit an acidic nature as a result of their dissolution in aqueous solutions and generation of hydrogen ions. The acidic character of the compounds is caused by this hydrogen ion.
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Nitric acid (HNO3) has a freezing point of 42 degrees Celsius and a boiling point of 181 degrees Celsius. It is a whitish, fuming, and very corrosive liquid. It is a well-liked and crucial industrial reagent for laboratories.
What sort of reaction occurs with HNO3?When such an acid is added to a base, a chemical reaction called neutralization takes place. One example is the reaction of nitric acid (HNO3) and the basic potassium nitrate (KOH).
HNO3 dissolved in water is it acidic?Because they dissolve in aqueous phase and produce hydrogen ions, acids like hcl (H C l), potassium nitrate (H 4-hydroxy N 3), and many others have an acidic character. This hydrogen ion is what gives the compounds their acidic nature.
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Molecule 1 has the following sequences of bases: TCAAGT.Which set of bases in Molecule 2 will bond to this sequence in a complementary way?answer choicesUCAAGUAGTACAAGUUCAUCAATA
AGTTCA is the set of bases in Molecule 2 that will bond to this sequence in a complementary way.
From the rules of base pairing, we know that Adenine always pairs with Thymine, and Cytosine always pairs with Guanine.
Adenine is denoted as A, Thymine is denoted as T, Cytosine is denoted as C, and Guanine is denoted as G. Therefore if the base sequence is TCAAGT, then following the rule of base pairing, the complementary sequence to this will be AGTTCA.
This strict arrangement is because only with this arrangement can hydrogen bonds form between these base pairs. Any other arrangement cannot sustain the integrity of the molecule.
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Which of the following is the strongest type of interaction that occurs between the atoms within the circled areas of the two molecules represented above
C. The interaction between the atoms within the circled areas of the two molecules represented above is a hydrogen bond.
What is hydrogen bond?A hydrogen bond is a type of interaction that occurs between a hydrogen atom that is covalently bonded to a highly electronegative atom (such as nitrogen or oxygen) and a highly electronegative atom of a different molecule. This interaction is stronger than a dipole-dipole interaction (polar covalent bond) or a London dispersion force (nonpolar covalent bond) but weaker than a covalent bond.
what are the factors involved in interaction of atoms?To confirm this, we can look at the electron density and electronegativity of the atoms involved, the geometry of the molecule, the distance between the atoms, and the strength of the bond.
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Which of the following is the strongest type of interaction that occurs between the atoms within the circled areas of the two molecules represented above
A) Polar covalent bond
B) Non polar covalent bond
C) hydrogen bond
D) london dispersion forces
Given the equation representing a system at equilibrium:AgCl(s)-><- H2O (on top of arrows) Ag ^+ (aq)+Cl^-(aq)When the concentration of Cl- (aq) is increased the concentration of Ag+ (aq)O Decreases, and the amount of AgCl(s) increasesO The ceoncentration of N2(g) is constantO The concentration of H2 (g) decreased and the concentration of NH3 (g) increasesO The equilibrium will shift ti the right and the concentration of NO2(g) will increase
Answer: The equilibrium will shift to the right and the concentration of Ag+ (aq) will decrease, and the amount of AgCl(s) will increase.
Explanation: In the equilibrium equation AgCl(s) <--> Ag^+(aq) + Cl^-(aq) represents a system where AgCl is in equilibrium with its dissociated ions Ag+ and Cl- in aqueous solution. The equilibrium is established by the forward and reverse reactions, AgCl(s) dissociating into Ag+(aq) and Cl-(aq) and Ag+(aq) and Cl-(aq) recombining to form AgCl(s).
When the concentration of Cl- (aq) is increased, the equilibrium system will shift to the right to consume some of the added Cl-. This is known as Le Chatelier's principle, which states that if a stress is applied to a system at equilibrium, the system will shift in the direction that will tend to relieve that stress. In this case, the added Cl- ions will react with the Ag+ ions to form more AgCl(s) and decrease the concentration of Ag+ ions.
It's important to note that the other options provided are not related to the reaction given and are not accurate.
a 0.185-g sample of the nickel salt was dissolved in 30.00 ml of 0.1013 n hcl. the excess hcl required 6.30 ml of 0.1262 n naoh to reach the end point. calculate the weight of the salt that contains one mole of nh3 (that is the equivalent weight of the salt)
The weight of the salt that includes one mole of NH3 is 82.44 g salt.
What is 1 moleThe International System for Units uses the mole (symbol: mol) as the unit of material quantity. How many basic entities of a particular substance are present in an item or specimen is determined by the quantity of that material.
The extra moles of HCl titrated with NaOH are first calculated. Normality and molarity is same for both NH3 and HCl.
So, 0.1262 N NaOH = 0.1262 M NaOH and 0.1013 N HCl = 0.1013 M HCl
6.30 mL x (1L/1000mL) x (0.1262 mol/L) x (1mol HCl/1mol NH3) = 0.000795 mol HCl
Now, we would calculate the total moles of HCl added to the sample.
30.00 mL x (1L/1000mL) x (0.1013 mol/L) = 0.003039 mol HCl
moles of HCl used to react with the sample of nickel salt = 0.003039 - 0.000795 = 0.002244 mol
From given equation, HCl is used to neutralize the ammonia present in the nickel salt and there is 1:1 mol ratio between them.
So, moles of NH3 present in the salt = 0.002244 mol
0.002244 moles of NH3 are present in 0.185 g of the sample. We need to calculate the grams of salt that would have 1 mol of NH3.
1 mol NH3 x (0.185 g salt/0.002244 mol NH3) = 82.44 g salt
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if 1.38 grams of sodium phosphate were dissolved in 50 ml of water, how mahy mols of ions would there be in the solution
The solution would contain 0.0084 mols of ions if 1.38 grams of sodium phosphate were dissolved in 50 mL of water.
What is mole concept?In the International System of Units, the mole (symbol mol) is the unit of substance amount. The amount of substance is a measurement of how many elementary entities of a given substance are present in an object or sample. The mole is defined as having 6.022140761023 elementary entities. The mole concept is an easy way to express the amount of a substance. Any measurement is divided into two parts: the numerical magnitude and the units in which the magnitude is expressed. Due to the small size of atoms and molecules, the mole concept allows us to count atoms and molecules by weighing macroscopically small amounts of matter.
Here,
given mass=1.38 gram
molar mass,
=23*3+31*1+16*4
=69+31+64
=164 grams
moles=given mass/molar mass
=1.38/164
=0.0084 moles
If 1.38 grams of sodium phosphate were dissolved in 50 mL of water, the solution would contain 0.0084 mols of ions.
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1. how many moles of fes are produced from 8.50 mole of fe?
2. how many moles of sb are produced from 5.00 moles of fe?
3. how many grams of sb,s, are needed to produce 75.500 moles of fes?
4. how many moles of fe are needed to produce 14.885 grams of fes?
5. calculate the grams of fe needed to react with 7.50 moles of sb s.
Answer:
8.50 moles of Fe will produce 8.50 moles of FeS.
5.00 moles of Fe will produce 5.00 moles of Sb.
75.500 moles of FeS will require 88.150 grams of SbS.
14.885 grams of FeS will require 12.83 moles of Fe.
7.50 moles of SbS will require 37.50 grams of Fe.
Explanation:
