Caesium(Cs) is the most reactive alkali metal in the group I than the francium due to the atomic radius, effective nuclear charge and the ionization energy of the caesium element.
Ionization energy is the energy requires to remove valence electron from the outer orbital. As we goes down the group, the ionization energy is decreased. This is occurred because as we goes down the group, the distance between outermost orbital and nucleus is increased. Therefore, it has lower ionization energy than other elements in the group.
Atomic radius of the element is the distance between the nucleus and the electron present in the outermost orbital. As we goes down the group, atomic radius is decreased. Therefore, it easily donates electrons and due to this, caesium is more reactive.
Fracium is really heavy element and there are many positive charges present in the nucleus of the francium. Due to the presence of more positive charges, electrons in the francium revolve at a speed of light. The electrons in the francium are closer to the nucleus than the caesium and it is harder to remove valence electrons in the caesium.
Therefore, caesium is reactive than the francium due to the ionization energy, atomic radius and effective nuclear charge.
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carbonated cola is more acidic than coffee or even orange juice because cola contains phosphoric acid. what is the molar concentration of h3o in a cola that has a ph of 4.240?
The molar concentration of h3o in a cola that has a pH of 4.240 is 5.
What is pH?
A scale is used to describe the basicity or acidity of the an aqueous solution in chemistry, with the term "potential of hydrogen" historically denoting this property. Lower pH values are recorded for acidic solutions (solutions to higher H+ ion concentrations) than for basic or alkaline remedies. The concentration of the solution's hydrogen ions is indicated inversely by the pH scale, which is logarithmic. The set of standard remedies whose pH has been established by international treaty can be used to trace the pH scale. Using a consolidation with transference, the potential difference between such a hydrogen electrode as well as a standard electrode, like the silver chloride electrode, is measured to determine the primary pH standard values.
Hence, the molar concentration of h3o in a cola that has a pH of 4.240 is 5.
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what are the steps in the correct order in a single pcr (polymerase chain reaction) cycle? i. elongation ii. annealing iii. amplification iv. denaturation v. extension
The correct order in a single PCR cycle would be denaturation, annealing, elongation, and amplification. IV, II, I, and III.
What is PCR?PCR is an acronym for Polymerase Chain Reactions. It is mechanisms through which scientists are able to amply, sometimes to a tune of millions or billions, a DNA of interest for detailed study.
The process of Polymerase Chain reaction occurs through alternate heating and cooling using a thermal cycler machine. It occurs through a series of steps which are highlighted below:
First, the DNA that contains the gene of interest is first denatured to separate the double-stranded structure into single strands.Next, a primer which is a short artificial DNA of a few nucleotide bases is made to anneal with its complementary bases on the denatured DNA that contains the gene of interest. Then, the primer is further extended by the addition of nucleotide bases that are complementary to the sequence of the gene of interest.Lastly, the process is repeated several times to synthesize multiple copies of the gene of interest.Thus, the right sequence of a PCR cycle would be denaturation, annealing, elongation, and amplification.
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Write both answers to at least two decimal places. Calculate the pH of a 0.160 M solution of KOH.Part 2 (1 point) Calculate the pOH of a 0.160 M solution of KOH.
To calculate the pH of a solution, we first need to find the concentration of hydronium ions in the solution. Since KOH is a strong base, it dissociates completely in water to produce hydroxide ions (OH-) and potassium ions (K+).
The concentration of hydronium ions in a solution of KOH can be calculated using the concentration of hydroxide ions and the equilibrium constant for water, which is equal to 1.00 x 10^-14 at 25 degrees Celsius.
The concentration of hydroxide ions in a 0.160 M solution of KOH is equal to the concentration of KOH, which is 0.160 M. The concentration of hydronium ions in the solution can be calculated using the equation below:
[H3O+] = (1.00 x 10^-14) / [OH-]
Substituting the concentration of hydroxide ions into the equation above, we get:
[H3O+] = (1.00 x 10^-14) / (0.160 M) = 6.25 x 10^-13 M
To calculate the pH of the solution, we need to take the negative logarithm of the concentration of hydronium ions. This can be done using the equation below:
pH = -log([H3O+])
Substituting the concentration of hydronium ions into the equation above, we get:
pH = -log(6.25 x 10^-13) = 12.20
The pH of a 0.160 M solution of KOH is 12.20.
To calculate the pOH of a solution, we first need to find the concentration of hydroxide ions in the solution. Since we already calculated this value above, we can simply use the concentration of hydroxide ions we found earlier: 0.160 M.
To calculate the pOH of the solution, we need to take the negative logarithm of the concentration of hydroxide ions. This can be done using the equation below:
pOH = -log([OH-])
Substituting the concentration of hydroxide ions into the equation above, we get:
pOH = -log(0.160 M) = 1.80
The pOH of a 0.160 M solution of KOH is 1.80.
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When taking a measurement with a pH meter, keep the instrument in the _______1_________ until it is needed. Rinse the pH meter with _______2_______ and gently pat dry. Place the meter in the sample solution, and record the measurement when the pH _________3_________.
1. Storage Solution
2. Deionized water
3. Stabilizes
When measuring with a pH meter, keep the instrument in the Storage solution until it is needed. Rinse the pH meter with Deionized water and gently pat dry. Place the meter in the sample solution, and record the measurement when the pH Stabilizes.
A pH meter is an instrument used to measure hydrogen ion activity in solutions. It must be calibrated before taking pH readings. If exceptionally exact data are needed, calibration should be done at the start of each day or before to each measurement. Select buffers that cover the samples' range of pH values.
When removing electrodes from one solution and preparing to place them in another, ALWAYS rinse them with distilled water and blot them with Kim wipes. Glass electrodes are incredibly fragile and are constructed of very thin glass.
There are two points of equivalency. When using a pH meter to measure something, leave the device in the storage solution until you need it. With deionized water, rinse the pH meter and then gently pat it dry. Once the pH has stabilized, submerge the meter in the sample solution and take a measurement.
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give the net ionic equation for the reaction (if any) that occurs when aqueous solutions of al(c2h3o2)3 and lino3 are mixed.
Since all species appear on both side of the ionic equation, there was no reaction.
Same ions present in both side of complete ionic equation are omitted to write net ionic equation. These ions are called the spectator ions.
first step - write down molecular equation as follows:
Al(C2H3O2)3(aq) + 3LiNO3 (aq) --> 3Li(C2H3O2)(aq) + Al(NO3)2(aq)
second step - write complete ionic equation;
Al3+ (aq) + 3(C2H3O2)^- (aq) + 3Li^+(aq) + 3N03^-(aq) -----> 3Li^+(aq) + 3(C2H3O2)^-(aq) + Al^3+(aq) + 3N03^-(aq)
You can see that all ions that appeared on the left hand side of the reaction equation also appeared on the right hand side of the reaction equation, thus thet are omitted. Hence there was no reaction.
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Which elements do not strictly follow the octet rule when they appear in the Lewis structure of a molecule?
Select one or more:
A: Chlorine
B: Carbon
C: Hydrogen
D: Sulfur
E: Fluorine
F: Oxygen
The elements do not strictly follow the octet rule when they appear in the Lewis structure of a molecule is : chlorine and sulfur.
The elements do not strictly follow the octet rule when they appear in the Lewis structure of a molecule is chlorine and sulfur. according to the octet rule the atom most posses the 8 electrons in the outermost shell called valence electrons. The chlorine and the sulfur will sometimes expand the octet rule this means more than 8 electrons in the valence shell.
Thus, The elements do not strictly follow the octet rule when they appear in the Lewis structure of a molecule is : chlorine and sulfur.
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a block of ice at 0oc is added to a 150-g aluminum calorimeter cup that holds 200 g of water at 10oc. if all but 2 g of ice melt, what was the original mass of the block of ice?
The ice block's original mass is 31.0312 grams.
What was the original mass?150 g for each cup.
Ice is at 0 degrees Celsius.
mass of water Equals 200 g
10°C is the water temperature.
2 grams of ice melt
finding out
solution
We are aware of this
Aluminum has a specific heat of c = 0.900 joule/gram °C.
Water's specific heat is 4.186 joule/gram at °C.
Thus, the temperature difference in this case is dt = 10-0 = 10°C.
so, in this instance, the heat given out by the
Heat lost is calculated as follows: water mass C dt + cup mass C dt
Heat loss is equal to 150 x 0.900 + 200 x 4.186.
temperature lost: 9722 J
so
Heat lost / latent heat of fusion here equals the mass of the ice melting.
The latent heat of fusion is given here as 334.88 joule/gram.
so
ice melt mass equals 9722 / 334.88
Ice melt weighs 29.0312 grams.
Therefore, the mass of ice in this area equals the sum of the mass of ice melt and ice melt.
ice mass = 29.0312 + 2
ice's mass is 31.0312 grams.
Consequently, the ice block's original mass is 31.0312 grams.
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How does contemporary become traditional?.
Contemporary- traditional become utilizing classical techniques in drawing, painting, and sculpting.
Contemporary-Traditional Art is a term used to describe artwork created in the present that employs traditional drawing, painting, and sculpture techniques to reflect the current culture. In order to portray human feelings and experiences through the creation of figurative and representational works of fine art, practising artists are primarily concerned with maintaining time-honored techniques. Subjects are built on the aesthetics of balancing the intuitive, internal conscience propelled by emotion, philosophical thought, or the spirit with the exterior reality. The phrase is used generically to refer to all representational art forms and aesthetics, including Classicism, Impressionism, Realism, and Plein Air (En plein air) painting. The Renaissance, Academic Art, and American Impressionism are the foundations of technical knowledge.
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What group forms a negative ion?.
If an extra electron is pushed into the atom so that it has an excessive number of electrons then it would form a negative ion.
The right side of the Periodic Table, or the side with no metals, is where non-metals are located.
Atoms generally experience atomic radius contraction as a result of adding electrons to the same valence shell and protons to the nucleus, with the smallest atoms to the right of the Periodic Table
As a result, the elements on the right side of the Periodic Table, such as fluorine, chlorine, and oxygen, Tend to be oxidizing, which means that their unshielded nuclear charge causes them to accept electron density.
N³⁻,O²⁻,F⁻ and Cl⁻
Clearly, the Parent atoms (or molecules) are unquestionably oxidizing species.
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What are the two conditions for an isotope to be unstable?.
The stability of the isotope depends on the composition of its nucleus, number of protons and neutrons and the proton to neutron ratio.
Radioactive isotopes are unstable because they have too many electrons. Many elements have one or more isotopes that are radioactive. These isotopes are called radioisotopes. In nuclear reactions, it is the nucleus of the atom that gains stability by undergoing a change of some kind. Some elements have no stable isotopes, which means that any atom of that element is radioactive. For some other elements, only certain isotopes are radioactive. A radioisotope is an isotope of an element that is unstable and undergoes radioactive decay. The energies that are released in nuclear reactions are many orders of magnitude greater than the energies involved in chemical reactions. Unlike chemical reactions, nuclear reactions are not noticeably affected by changes in environmental conditions, such as temperature or pressure.
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How do you control chemical exposure in the workplace?.
By changing process to minimize contact with hazardous chemicals. And Isolating or enclosing the process etc. We can control chemical exposure in the workplace.
Controlling exposures to chemical hazards and toxic substances is the fundamental method of protecting workers. A hierarchy of controls method is used as a means of determining how to implement feasible and effective controls.
The method use to control can be-
Change process to minimize contact with hazardous chemicals.
Isolate or enclose the process.
Use of wet methods to reduce generation of dusts or other particulates.
General dilution ventilation.
Use fume hoods.
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draw the electron dot structure of the scl2 molecule, and then use vsepr theory to draw a model that shows the shape of the molecule and its polarity. the electronegativity difference between s and cl is 0.5
When left at room temperature, Sulphur dichloride is a viscous crimson liquid. It smells strong, almost like chlorine. Acids containing chlorine are created when it combines with water.
It is extremely poisonous and corrosive to use Sulphur dichloride. Because S and Cl have negligible differences in electronegativity, it is a covalent molecule. They are both non-metals. chlorine is in the -1 oxidation state while S is in the +2 oxidation state. In addition to carbon tetrachloride, it is soluble in hexane and benzene.
Dots are used in this method to represent the electrons in the valence shell; two dots on dissimilar elements can be connected to form a bond. The octet rule and formal charges should be satisfied by the final Lewis structure of Sulphur dichloride. Another Lewis structure is drawn if it doesn't fulfil either of them.
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Suppose 2.5 g of Compound A and 6.5 g of Compound B are consumed in a reaction that produces only one product, Compound C. Calculate the theoretical yield of C. Round your answer to the nearest 0.1 g. Suppose 6.0 g of C are actually isolated at the end of the reaction What is the percent yield of Compound C? Round your answer to the nearest whole percent. x ?
According to the given statement 70% is the percent yield of Compound C.
What are instances and compounds?A composite is a material made of two maybe more components. Examples of compounds includes carbon dioxide, water, and table salt.
Briefing:According to the information provided, a reaction that results in the production of Compound C uses 2.5 g of Compound A and 6.0 g of Compound B. We can presume that the mass of A and B that are both entirely consumed to form C has been calculated using the limiting reactant.
The sum of a masses of the reactants equals the total of the masses of the products according to the rule of mass conservation. so:
Theoretical yield
= sum of the reacting masses
Theoretical yield = (2.5 + 6.0) g
Theoretical yield = 8.5g
Percentage yield
= (actual yield/theoretical yield) * 100%
Percentage yield = (6.0 g / 8.5 g) * 100%
Percentage yield = 70%
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Does mitosis help with cancer?.
Increased immune resistance brought on by the blockage of the cell cycle during the mitotic phase may aid cancer cells in thwarting immunological attack.
Cancer is caused by "aggressive division" of cells, which the immune system leaves unchecked. In order to thwart the immune system, cancer cells express a number of proteins. Targeting and preventing cancer cells from dividing is a key component of treatment. We discovered that during the mitotic phase of cell division, these proteins express themselves more strongly. As a result, blocking the cell cycle during the mitotic phase may boost immune resistance, which will aid cancer cells in avoiding immunological attack. PBMCs (peripheral blood mono-nuclear cells), a type of cancer cell, and real-time immune cell attack (RTICA) analyses were used. According to our research, cells that express higher levels of HLA-G and PD-L1 are mostly in the G2 phase, while cells that express lower levels are primarily in the G1 phase.
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suppose that daniel has a 2.50 l bottle that contains a mixture of o2 , n2 , and co2 under a total pressure of 5.10 atm. he knows that the mixture contains 0.310 mol n2 and that the partial pressure of co2 is 0.250 atm. if the temperature is 273 k, what is the partial pressure of o2 ?
The partial pressure of O₂ from daniel's 2.5L bottle that contains a mixture of O₂, N₂ and CO₂ under a total pressure of 5.10 atm is 2.171atm.
What is partial pressure?In a mixture of gases, each constituent gas has a partial pressure which is the notional pressure of that constituent gas as if it alone occupied the entire volume of the original mixture at the same temperature.
How to calculate the partial pressure of O₂?
Volume (V) = 2.5L
T = 273K
o₂ + N₂ + CO₂ ---> Total pressure P = 5.1atm
N₂ = 0.31 mol
Partial pressure CO₂ = 0.25atm
R = 0.0821L (ideal gas constant with given volume in L and temperature in K)
P*V = n*R*T
n = P*V / R*T
= (5.1 * 2.5) / (0.0821 * 273)
= 12.75 / 22.4133
= 0.56886 mole
Partial pressure of N₂
= mol fraction * Total pressure
= (0.31 / 0.56886) * 5.1
= 2.779atm
Total pressure
P = P O₂ + P N₂ + P CO₂
5.2 = P O₂ + 2.779 + 0.25
P O₂ = 5.2 - 2.779 - 0.25
P O₂ = 2.171atm
Therefore, the partial pressure of O₂ is 2.171atm.
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What is the conflict theory in social work?.
The competition among social groupings for scarce resources is the main topic of conflict theory.
Conflict definition, for instance.An ongoing argument between individuals who hold diametrically opposed principles or opinions: He and his father had a lot of disagreements. As a result of its unpopularity, the policy led to numerous disputes inside the party. Frequently, he and the president would disagree due to his outspoken opinions.
In what ways does a story conflict?These issues are known as conflicts in literature. Conflict is a more exact term for thwarted, imperiled, or competing desire. Essentially, it occurs when a character tries to accomplish a goal but is hindered by external circumstances. Perhaps something is desired by the character but is out of reach.
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both copper (atomic number 29) and chromium (atomic number 24) appear to break the pattern in the order of filling the 3d and 4s orbitals. this change in pattern is expressed by
A decrease in the amount of electrons in the 4s orbital and an increase in the 3d orbital are indicators of the pattern alteration.
THE ORDER OF FILLING 3d AND 4s ORBITALS: -
You may easily determine the electrical structures of elements by using the method that is typically taught when explaining the sequence in which orbitals are filled. However, it does provide issues when attempting to describe various transition element features.
The order of filling orbitals: -
Prior to filling higher energy orbitals, electrons first fill low energy orbitals that are closer to the nucleus. When given the option between two orbitals with the same energy, they fill the orbitals singly as much as they can.
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when 15.1 g of al reacts with 17.7 g of oxygen gas, how many grams of al2o3 (101.96 g/mol) are predicted to form? report your answer to the tenths place and do not include units.
[tex]2Al+ 1.5O_2 \to Al_2O_3\\2Al= 2×27=54 \\g .[/tex]
Hence, the weight of Al used in the chemical reaction is 54 g.
What is a chemical reaction?
chemical reaction, the transformation of one or more chemicals (the reactants) into one or more distinct compounds (the products). Chemical elements or chemical compounds make up substances. In a chemical reaction, the atoms that make up the reactants are rearranged to produce various products.Chemical reactions are a fundamental component of life itself, as well as technology and culture. Burning fuels, smelting iron, creating glass and pottery, brewing beer, making wine, and making cheese are just a few examples of ancient processes that involved chemical reactions.To know more about chemical reactions, click the link given below:
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what amount of solid naoh must be added to 1.0 l of a 0.14 m h2co3 solution to produce a solution with [h ]
0.0114 g of solid Sodium hydroxide (NaOH) must be added to 1.0 L of a 0.14 M H2CO3 solution to produce a solution with [H+] of 3.5×10−11 M.
What called NaOH ?Lye and caustic soda are other names for sodium hydroxide, an inorganic substance having the formula NaOH. It is a white, solid ionic substance made up of the cations sodium (Na+) and the anions hydroxide (OH).
Contact with very high sodium hydroxide concentrations can result in fatal or severe burns to the eyes, skin, lungs, digestive system, or eyes. Skin contact that is prolonged or repetitive may result in dermatitis. Repeated lung injury from inhaling sodium hydroxide vapour is possible.
H2CO3 + 2NaOH → Na2CO3 + 2H2O
C H2CO3 = 0.14 M
V sln = 1 L
[H3O+] = 3.5 E-11 M
pH = - Log [H3O+]
pH = 10.456
14 = pH + pOH
pOH = 3.544
[OH-] = 2.8571 E-4 M
C NaOH = [OH-]
C NaOH = 2.8571 E-4 M
mol NaOH = (2.8571 E-4 mol/L)*( 1 L ) = 2.8571 E-4 mol
molar mass NaOH = 39.997 g/mol
mass NaOH = (2.8571 E-4 mol)*(39.997 g/mol) = 0.0114 g
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How do you identify a type of chemical reaction?.
Type of chemical reaction looking at the given products and reactants in the chemical equation.
When atoms' chemical bonds are established or ruptured, chemical processes take place. The materials that initiate a chemical reaction are known as reactants, while the materials created as a result of the reaction are known as products. Although a chemical reaction is not necessarily a "one-way street," as we'll examine further in the following section, it is usually shown by an arrow between the reactants and products. Some chemical processes just go in one way until all of the reactants have been utilised. It is said that these reactions cannot be stopped. But some reactions can be classified as reversible. Reactions that are reversible have the ability to move both forward and backward.
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Sulfuric acid decomposes into sulfur trioxide gas and water. What would be the respective coefficients for balancing?.
Chemical equations must be balanced, which requires that the quantity and type of atoms on both sides of the reaction arrow be equal.
What are the balanced reaction's coefficients?As a result, chemical equations must be balanced, which requires that the quantity and type of atoms on both sides of the reaction arrow be equal. Coefficients are the values added in front of formulas to balance equations; they multiply each atom in a formula.The number in front of the variable phrases is the coefficient, just like in algebra. The number in front of the formula is the coefficient in chemistry.
Sulphur trioxide = SO_3
Sulfuric acid = H_2SO_4
SO 3(g) + H2O (l) ---> H2SO4 (aq)
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Approximately what percentage of the atp formed by the reactions of glycolysis is produced by substrate-level phosphorylation?.
The percentage of the ATP formed by the reactions of glycolysis produced by substrate-level phosphorylation is 100%.
What is substrate-level phosphorylation?Substrate-level phosphorylation can be described as a metabolism reaction that occurs in the production of ATP or GTP by the transfer of phosphate from a substrate directly to ADP or GDP.
Transferring from higher energy into a lower energy production process uses some of the released chemical energy to transfer a phosphoryl group to ADP or GDP from another phosphorylated compound.
Oxidation and phosphorylation are not coupled in the substrate-level phosphorylation, and reactive intermediates are commonly gained in the oxidation processes in catabolism. Most ATP is formed by oxidative phosphorylation in anaerobic respiration while substrate-level phosphorylation gives a less efficient and quick source of ATP, independent of external electron acceptors.
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Which groups of the periodic table follow patterns in their valence electrons?.
Answer:
Valence Electrons
Calculate the change in heat when 10.00 g of water vapor (steam) at 100.0°c condenses to liquid water and then cools to 10.00 °c
The change in heat when 10g of water vapor at 100 degree celcius condenses to liquid water and then cools to 10 degree celcius is 26.38KJ
What is heat?It is a transfer of a kinetic energy from one substance or object into another substance or object, or from an energy source to a medium or object. Such energy transfer can occur in three ways : radiation, conduction, convection.
Here, we want to calculate how much heat that's been released from the water vapor (steam) at 100 degree celcius, condenses to liquid water, and then cools down into 10 degree celcius.
Q = Q1 + Q2
Q1 = steam condensation takes place at 100 degree celcius.
Q2 = water cools down into 10 degree celcius
Q1 = m. Lv
Lv = latent heat of vaporization of water = 2260 J/g (standard)
m = mass of steam = 10g
Q1 = 10 * 2260 J/g = 22600 J
Specific heat of water = 4.2 J/g.K
ΔT = T final - Tcools down = (100 + 273) - (10 + 273) = 90 Kelvin
Q2 = m*c*ΔT
= 10 * 4.2 * 90
= 3,780 J
Q = Q1 + Q2
= 22,600 + 3,780
Q = 26,380J
1 J = 10^-3KJ
Q = 26.38KJ
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Identify the compound that does not have dipole-dipole forces as its strongest force.
Dipole-dipole forces are not the greatest force [tex]CO_{2}[/tex] from the examples given. While the largest forces in the other compounds, such as [tex]CH_{2}Br_{2}[/tex], [tex]CH_{3}Br[/tex], [tex]CHCl_{3}[/tex], and [tex]CH_{3}OCH_{3}[/tex], are dipole-dipole forces.
Despite having polar connections between its center carbon atom and two oxygen atoms, [tex]CO_{2}[/tex] is a non-polar molecule. There are only London dispersion forces since the dipoles are pointing in opposite directions and cancel each other out.
There is an electronegative difference between the carbon atom and the halogen atom in the compound [tex]CH_{2}Br_{2}[/tex], [tex]CH_{3}Br[/tex], and [tex]CHCl_{3}[/tex] . As a result, these compounds, which are also polar, include dipole-dipole forces. The dipole-dipole and London dispersion forces are both present in the compound [tex]CH_{2}Br_{2}[/tex].
Dimethyl ether is [tex]CH_{3}OCH_{3}[/tex]. In methoxy methane (or dimethyl ether), the carbon and oxygen linkages are polar. Its geometry is angular. This molecule exhibits the London dispersion and dipole-dipole forces.
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ASAP!
For the reaction below calculate how many grams of M3N7 are needed to produce 3 g of Sn3N4
4 Mn3N7 + 21 Sn(504)2 ---> 6 Mn2(504)7 + 7 Sn3N4
Taking into account the reaction stoichiometry, a mass of 1.092 grams of Mn₃N₇ is needed to produce 3 g of Sn₃N₄.
Reaction stoichiometryIn first place, the balanced reaction is:
4 Mn₃N₇ + 21 Sn(SO₄)₂ → 6 Mn₂(SO₄)₇ + 7 Sn₃N₄
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
Mn₃N₇: 4 molesSn(SO₄)₂: 21 molesMn₂(SO₄)₇: 6 molesSn₃N₄: 7 molesThe molar mass of the compounds is:
Mn₃N₇: 263 g/moleSn(SO₄)₂: 311 g/moleMn₂(SO₄)₇: 782 g/moleSn₃N₄: 413 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
Mn₃N₇: 4 moles ×263 g/mole= 1052 gramsSn(SO₄)₂: 21 moles ×311 g/mole= 6531 gramsMn₂(SO₄)₇: 6 moles ×782 g/mole= 4692 gramsSn₃N₄: 7 moles ×413 g/mole= 2891 gramsMass of Mn₃N₇ requiredThe following rule of three can be applied: If by reaction stoichiometry 2891 grams of Sn₃N₄ are produced by 1052 grams of Mn₃N₇, 3 grams of Sn₃N₄ are produced by how much mass of Mn₃N₇?
mass of Mn₃N₇= (3 grams of Sn₃N₄× 1052 grams of Mn₃N₇)÷ 2891 grams of Sn₃N₄
mass of Mn₃N₇= 1.092 grams
Finally, a mass of 1.092 grams of Mn₃N₇ is needed.
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which quantities are the same for all atoms of chlorine? i number of protons ii number of neutrons iii number of electrons
The number of protons and electrons is the same for all atoms of Chlorine. The correct options are i and iii
Isotopes are atoms of the same element that have the same number of protons but a different number of neutrons. These variations in the number of neutrons result in atoms of the same element having different mass numbers.
The difference in the number of neutrons means that isotopes of an element have different atomic masses and different physical and chemical properties.
For example, Chlorine has two naturally occurring isotopes, Chlorine-35(17 protons, 18 neutrons) and Chlorine-37 (17 protons, 18 neutrons). All three isotopes have the same number of electrons and protons, but the different number of neutrons results in different mass numbers.
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What led to the prohibition of alcohol?.
(- Temperance Movement
there was a combination of political and social factors that led to prohibition. one of the main political factors was the Temperance Movement.
The temperance movement was a social movement against the consumption of alcohol.
ow many geometric isomers are possible for [co(en)(nh3)2(h2o)cl] ? how many of those geometrical isomers are chiral? (meaning that each has a non-superimposable mirror image)?
[co(en)(nh3)2(h2o)cl] has a possible four geometric isomers. Unless they also have chiral centers, geometric isomers are typically not optical isomers.
What is an example of an isomer?Isomers are substances that have the exactly the same amount of protons as one another, meaning they have the exact same equations, but differ from one another in terms of how the atoms are ordered. Ethylbenzene, m-xylene, p-xylene, or o-xylene are some examples of isomers having the formula C8H10.
What makes it an isomer?Are referred to as isomers if they have the same chemical formula but different characteristics and atom arrangements. Isomers are chemicals that exhibit isomerism as a result. The Greek words "isos" and "meros," which mean "equal pieces," are the source of the English word "isomer."
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put the steps of this transport pump in order na-k pump question 18 options: potassium triggers dephosphorylation of the pump which stabilizes the e1 confirmation. 2 potassium bind the e1 confirmation is open to the inside of the cell and has a high affinity for sodium 2 potassium ions are released inside the cell 3 sodium ions bind the e2 confirmation is open to the outside of the cell and has a high affinity for potassium. 3 sodium ions are released outside the cell. sodium triggers phosphorylation of the pump which stabilizes the e2 confirmation.
The carrier protein and three sodium ions first bind. The carrier protein and three sodium ions first bind. The sodium exits thanks to the altered form. Here 2 potassium ions are discharged.
The carrier protein is shaped in such a way that it can attach to potassium. The protein undergoes another shape change after the release of the sodium ions. The cell is now filled with potassium ions. The e2 confirmation is stabilized by the pump being phosphorylated by sodium, which causes it to happen. With an extremely high affinity for sodium, potassium binds the e1 confirmation, which is accessible to the inside of the cell. Inside the cell, 2 potassium ions are discharged. Three sodium ions bind to the e2 confirmation, which is accessible from the outside of the cell and has a strong affinity for potassium.
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