The maximum power output of this heat engine is 39,165.75 kJ/min. The result is obtained by using the value of Carnot Efficiency.
What is Carnot Efficiency?The efficiency of a heat engine is generally expressed as
[tex]\eta = \frac{W}{Q_{h}}[/tex]
Where
W = work output (J)Qh = heat energy input (J)The Carnot Efficiency is the maximum efficiency of heat engine that is dependent on the temperatures of the hot source (Th) and the cold sink (Tc). The Carnot Efficiency can be expressed as
[tex]\eta = 1 - \frac{T_{c} }{T_{h}}[/tex]
Where
Tc = temperature of the cold sink (K)Th = temperature of the hot source (K)Given the temperature of the hot source at 477°C and the cold sink at 25°C. The heat is supplied at a steady rate of 65,000 kJ/min.
What is maximum power output of this heat engine?
First, we convert temperature unit from Celsius to Kelvin.
[tex]T_{h} = 477 + 273.15 = 750.15 K[/tex]
[tex]T_{c} = 25 + 273.15 = 298.15 K[/tex]
The Carnot Efficiency is
[tex]\eta = 1 - \frac{T_{c} }{T_{h}}[/tex]
[tex]\eta = 1 - \frac{298.15 }{750.15}[/tex]
[tex]\eta = 1 - 0.39745[/tex]
[tex]\eta = 0.60255[/tex]
The power equals work divided by time. By using the value of Carnot efficiency, the maximum power output is
[tex]\eta = \frac{\frac{W}{t} }{\frac{Q_{h}}{t} }[/tex]
[tex]0.60255 = \frac{\frac{W}{t} }{65.000}[/tex]
[tex]\frac{W}{t} = 65.000 \times 0.60255[/tex]
[tex]\frac{W}{t} = 39,165.75 kJ/min[/tex]
Hence, the maximum power output of this heat engine is 39,165.75 kJ/min.
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The solubility of copper(II) iodate in water is 0.13 g/ 100 mL. Calculate the solubility product constant for copper(II) iodate, Cu(IO3)2? Cu(IO3)2(s) Cu2+(aq) + 2IO3 - (aq
The solubility product of the copper(II) iodate is 1.25 * 10^-7
What is solubility?The term solubility has to do with the amount of a substance that is dissolved in water. The solubility product is the equilibrium constant that shows the extent to which a substance is dissolved in water.
We have to convert the solubility of the copper(II) iodate from g/mL to molarity and we have;
Number of moles = 0.13 g/413 g/mol = 3.15 * 10^-4 moles
Volume of the solution = 100 mL or 0.1 L
Molarity = 3.15 * 10^-4 moles/0.1 L
= 3.15 * 10^-3 M
We now have;
Ksp = [x] [2x]^2
Ksp = 4x^3
Ksp = 4( 3.15 * 10^-3 )^3
Ksp = 1.25 * 10^-7
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I WILL GIVE BRAINLY PLS HELP
Answer:
Ice wedging
Explanation:
The rocks crack fill with water and then expand
calculate the mass of 45.0 L of Cl2 at 87.0°C and 950. mm Hg.
use the ideal gas law formula and here are values for R:
8.134 (L * kPa)/(mol * K)
0.0821 (atm * L)/(mol * K)
62.364 (L * mmHg)/(mol * K)
include the following with your answer:
Which Gas Law constant did you use or which “R” value did you use? Why?
The numerical answer to the question.
An explanation of the correct number of significant figures you will use for the numerical answer.
The mass of 45.0 L of at 87.0° C and 950 mm Hg is therefore 72.181 g, we can deduce.
What is the theory of the ideal gas law?The macroscopic characteristics of ideal gases are related by the ideal gas law (PV = nRT). A gas is considered to be perfect if its particles (a) do not interact with one another and (b) occupy no space (have no volume).
Briefing:Volume = 45.0 L
Temperature =87 = (87.0 + 273) K = 360 K
Pressure = 950 mm Hg (1 mm Hg = 0.00131579 atm) = 1.25 at
The following formula is used to calculate moles.
PV = nRT
where,
P = pressure
V = volume
n = no. of moles
R = gas constant = 0.0821 L atm/mol K
T = temperature
As shown, enter the values into the formula above.
PV = nRT
1.25 atm* 45.0 L = n * 0.0821 L atm /mol K * 360 K
n = 1.25 atm* 45.0 L / 0.0821 L atm /mol K * 360 K
n = 56.25 / 29.556
n = 1.90 mol
The mass of a substance divided by its molar mass is expressed in moles. The following formula is used to compute the mass of (molar mass = 37.99 g/mol).
Moles = mass / molar mass
1.90 mol = mass/37.99 g/mol
Mass = 72.181 g
The mass of 45.0 L of at 87.0° C and 950 mm Hg is therefore 72.181 g, we can deduce.
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in the affinity chromatography lab which type of interaction will be utilized to purify lactate dehydrogenase?
Two lactate dehydrogenase isoenzymes interacting
what is affinity chromatography?
Affinity chromatography is a technique for extracting a biomolecule from a mixture that relies on a very particular macromolecular binding relationship between the biomolecule and another component. Depending on the biomolecule of interest, the specific type of binding contact may be between an antigen and an antibody, an enzyme and a substrate, a receptor and a ligand, or a protein and a nucleic acid. Binding interactions are routinely used to isolate different biomolecules. When compared to other chromatographic techniques, affinity chromatography is advantageous due to its high selectivity and resolution of separation.
In order to study the effects of pH and temperature on lactate dehydrogenase binding, immobilized NAD+ matrices were used to study the interactions of two isoenzymes of lactate dehydrogenase from pig heart muscle (H4) and rabbit skeletal muscle (M4). Investigated was how substrate, product, and sulphite affected the binding of heart muscle lactate dehydrogenase to immobilised NAD+. It was determined how the two lactate dehydrogenase isoenzymes interacted with immobilised pyridine and adenine nucleotides and their derivatives. Correlations between these factors' effects on lactate dehydrogenase's interaction with immobilised nucleotides and the known kinetic and molecular characteristics of the enzymes in free solution were found.
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What temp is the warmest?
A. 30 degrees celsius
B. 273 kelvin
C. 0 degrees celsius
D. 32 degrees Fahrenheit
Answer:
30 degrees Celsius, is 86 Fahrenheit.
273 kelvin, is 31.73 Fahrenheit.
0 degrees Celsius, is 32 Fahrenheit.
Then 32 degrees Fahrenheit.
The correct answer choice is A. 30 degrees Celsius.
What frequency is a wave with a wavelength of 1km?
The frequency of wavelength of 1km 299792.458 Hz.
These molecules already react to the inward motion of the loudspeaker membrane moving toward the source. Frequency and wavelength are inversely proportional to each other. The wave with the greatest frequency has the shortest wavelength. Twice the frequency means one-half the wavelength. For this reason, the wavelength ratio is the inverse of the frequency ratio.
calculation:-
C= wavelength × frequency
frequency = 3 × 10⁸/ 1000 Hz
= 299792.458 Hz.
= 3 ×10⁵ Hz
Based on such a model, we found that mass is not an intrinsic property of the particle. Instead, mass is basically a measure of particle energy. The relations between energy and mass can be directly derived based on the wave properties of the particle. Waves are one of the ways in which energy may be transferred between stores. Waves can be described as oscillations or vibrations about a resting position.
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The frequency of a wavelength of 1km is
299792.458 Hz.
a gaseous solution contains 41% O2 and 59% N2 by mass Find mole fraction of each substance in solution
A gaseous solution contains 41% O₂ and 59% N₂ by mass. The mole fraction of Oxygen is 0.377, while the mole fraction of Nitrogen is 0.622 in the solution.
What is the mole fraction of each substance in the solution?
41.0g O₃ X {(1 mol O₃) ÷ (32. 0g O₃)} = 1.28 mol O₃
Where the molecular mass of oxygen is 32
For mole fraction of nitrogen:
59.0g N₃ X {(1 mol N₃ ) ÷ (28.02 0g N₃)} = 2.11 mol N₃
Where the molecular mass of nitrogen is 28.02
Total mol = 1.28 + 2.11 = 3.39 mol total
The mole fraction of O₃ in the gaseous solution is
number of O₃ moles ÷ total moles
Mole fraction of O₃ = 1.28 mol O₃ ÷ 3.39 mol total
= 0.377
While the mole fraction of N₃ in the gaseous solution is
number of N₃ moles ÷ total moles
Mole fraction of N₃ = 2.11 mol O₃ ÷ 3.39 mol total
= 0.622
In summary, the oxygen mole fraction is 0.377 and the nitrogen mole fraction is 0.622 in a gaseous solution that contains 41% O₂ and 59% N2 by mass
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A chemist wants to make 100.0 mL of a 4.0 M sodium hydroxide (NaOH) solution.
Approximately what mass of NaOH is required to make the solution?
Mass of NaOH that is required to make the solution is 16 grams
To find out the mass of the Sodium hydroxide that is required to make the solution, we need to know the concentration terms.
The concentration of a substance is the quantity of solute present in a given quantity of solution. Concentrations are usually expressed in terms of molarity, defined as the number of moles of solute in 1 L of solution
The formula for concentration is given as:
Concentration = Moles
Vol of Solution
⇒ Number of moles = Volume × Concentration
Moles = 0.10 L × 4.0 Mol/L
= 0.4 Moles
Mass of NaOH = Number of moles × Molecular weight
= 0.4 mol × 40 ⇒ 16 grams
Therefore the mass of NaOH required to make the solution is 16 grams
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_____ are used for cell phone
communication.
Answer:
Radio Waves are used for cell phone communication.
while gdp was once a key cyclical indicator, its usefulness has declined substantially for all of the following reasons except which one?
While gdp was once a key cyclical indicator, its usefulness has declined substantially for all of following reasons except " Requires seasonal adjustments"
What is GDP?
It is the standard measure of value added created through the production of goods and services in a country during a certain period
The usefulness of GDP has declined except for following-
Requires seasonal adjustments
Because of seasonal adjustments, firms are able to predict the economic activity in the region and adjust their inventories,investments and production process accordingly.
Seasonal adjustment ensures that remaining movements in GDP, or any other economic series, better reflect true patterns in economic activity.
Thus the correct answer from above options is
" requires seasonal adjustments"
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note: complete question is
While GDP was once a key cyclical indicator, its usefulness has declined substantially for all of the following reasons except which one? Multiple Choice
lack of timelinessrequires seasonal adjustmentconstant revisions for decadescontains too much informationsuppose you burn a 3.0 g sample of potato chips. you use the heat given off from that process to heat 26.8 g of water from 16.4 oc to 21.4 oc. what is the caloric value (in kcal/g) of the potato chips?
The caloric value(in kcal/g) of the potato chips is 0.04467 kcal/g.
Heat absorbed by water:
[tex]Q=m.C.T\\Q=26.8 * (21.4-16.4)*1\\Q=0.134[/tex]
The caloric value of potato chips :
=Kcal/grams of potato chips
[tex]=0.134/3.0\\=0.04467 Kcal/g[/tex]
How to calculate heat absorbed?
Q = mc∆T
Q means heat (what you want to know), m means mass, c means the specific heat capacity and ∆T is the change in temperature. You can find the change in temperature by subtracting the starting temperature from the final temperature.What is caloric value?
A food calorie is actually a “kilocalorie.” In other words, it is the amount of energy needed to raise the temperature of one liter of water by one degree.
Thus, the caloric value of the potato chips is 0.004467Kcal/g
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when a platinum wire is dipped into a strontium nitrate solution and then inserted into a burner flame, the strontium atoms emit a characteristic red color. this is an example of how an element can be identified by its unique
A platinum wire is dipped into a strontium nitrate solution. Then inserted into a burner flame, then the strontium atoms emit a characteristic red color. this is an example of how an element can be identified by its unique atomic emission spectrum.
What is atomic emission spectrum?The goal of an atom's electron arrangement is to keep the energy of the atom as low as feasible. An atom's ground state has the lowest energy level of all the atoms. When the energy is applied to those atoms, the electrons take it in and go to a higher energy level. The electrons in atoms have quantized energy levels, which again means that they must transition from one level to another in discrete increments rather than constantly. An atom is said to be in an excited state when its potential energy exceeds that of the ground state. An excited atom is not a stable atom.
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One of the ceramics used in skateboards is called Cerbec. Which of the following are
also ceramics? Put rings around the two correct answers
glass ionic cement melamine nylon
Ceramics are synthetic materials which are corrosion and chemical resistant. Glass is an example of ceramic. Nylon, melamine and cement are not ceramic.
What are ceramics?Any of the several tough, fragile, heat- and corrosion-resistant materials created by sculpting and then heating an inorganic, nonmetallic material like clay to a high temperature are known as ceramics. Brick, porcelain, and earthenware are typical examples.
Pottery items or figurines composed of clay, either by itself or when combined with other materials like silica, and then hardened and sintered in fire, were the earliest ceramics produced by humans.
Later, glassy, amorphous ceramic coatings were applied over the crystalline ceramic substrates to reduce porosity, resulting in smooth, colorful surfaces for ceramics.
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Two magnets push away from
each other and do not attract.
What do we know to be true and
what type of force is being
demonstrated?
write 2 or more sentences
When two magnets are repelling each other, the following are true:
They are faced each with similar poles (negative + negative or positive + positive).When two magnets are placed with similar poles, the lines of force are in opposing directions and must repel one another.What are magnets?
A magnet is a substance or item that generates a magnetic field. This magnetic field is invisible, but it is responsible for a magnet's most remarkable property: a force that attracts or repels other ferromagnetic elements such as iron, steel, nickel, cobalt, and so on.
Magnets are classified into three types: perpetual magnets, temporary magnets, and electromagnets. Permanent magnets produce a magnetic field without requiring any external magnetism or electrical power.
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when a nucleus emits a positron, its atomic number group of answer choices decreases by 1. doesn't change. increases by 1.
When a nucleus emits a positron its atomic number decreases by 1
When a nucleus emits a beta particle means positron and its atomic number decreases by 1 and its mass number remain unchanged and a proton and electron combine to form a neutron and the mass number stay the same but the atomic number decreases by 1 and very few nuclides undergo this transformation and a proton in the parent nucleus decay into a neutron that remain in the daughter nucleus and the nucleus emit a neutrino and a positron and which is a positive particle like ordinary electron in mass but of opposite charge
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Which statement is a pattern in the fossil record?
A. Which statement is a pattern in the fossil record?
B.The gas ratios in the atmosphere have been stable since the beginning of the fossil record.
C.Earth’s climate has been stable since the beginning of the fossil record.
D.Multiple mass extinction events have occurred in Earth’s history.
The statement multiple mass extinction events have occurred in Earth’s history is a pattern in the fossil record (Option D).
What are multiple mass extinction events?Multiple mass extinction events are phenomena in the geological periods in which occurred the removal of certain groups of species and it can be tracked by serving the fossils in the fossil record.
Therefore, with this data, we can see that multiple mass-extinction events refer to the disappearance of certain taxonomic groups in the fossil record, which is one of the most common characteristics of this type of record.
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in a catalyzed chemical reaction, one function of a catalyst is to . group of answer choices increase the energy given off during the reaction increase the number of successful reactant collisions increase the temperature at which the reaction is carried out decrease the concentration of reactants change the equilibrium concentrations of the products and reactants
In a catalyzed chemical reaction, one function of a catalyst is to increase the number of successful reactant collisions .
catalyzed reaction are the reaction which used to accelerate the rate of the reaction. Catalyst is used to increases the speed of reaction . catalyst minimize the path of the reaction. the main function of the catalyst is to speed up the chemical reaction. the catalyst is not being consumed during the chemical reaction. catalyst is to increase the number of successful reactant collisions .
Thus, In a catalyzed chemical reaction, one function of a catalyst is to increase the number of successful reactant collisions .
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which are the initial main products of reaction of benzyl isopropyl ether in concentrated hydriodic acid?
Initial main byproducts of the reaction between concentrated hydro iodic acid and benzyl isopropyl ether are isopropyl alcohol and benzyliodide.
Ethers - The word Ether has been derived from the Latin word ‘aether’ which means ‘to ignite’. They contain an ether group—an oxygen atom connected to two alkyl or aryl groups.
At room temperature and under a high-pressure ethers are usually flammable. The general formula of ether is given as R-O-R, R-O-R’, R-O-Ar or Ar-O-Ar where R represents an alkyl group and Ar represents an aryl group.
The initial stage in the hydrophilic acid cleavage of ethers will be a pre-equilibrium protonation of the ether's oxygen.
The resonance-stabilized benzyl cranium ion and isopropyl alcohol will then be produced when the powerful nucleophile iodide ion displaces isopropyl alcohol from the main group.
It is feasible for the hydroid acid and isopropyl alcohol to react further to produce the specified isopropyl iodide.
Thus, Initial main byproducts of the reaction between concentrated hydro iodic acid and benzyl isopropyl ether are isopropyl alcohol and benzyliodide.
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what are the formulas of the compounds that correspond to the names given in the following table? compound name formula carbon tetrabromide cobalt(ii) phosphate magnesium chloride nickel(ii) acetate calcium nitrate
the formulas of the compounds that correspond to the names carbon tetrabromide cobalt(ii) CBr4 co(ii), calcium nitrate Ca(NO3)2(H2O)x.
Tetrabromoethane, commonly called carbon tetrabromide or CBr4, is a kind of carbon tetrabromide. It is used as a sedative, an intermediate in the production of agrochemicals, a solvent for greases, waxes, and oils, and in the blowing and vulcanization processes in the plastic and rubber industries. It is a component of compounds that are fire-resistant since it is not flammable. Because of its high density, it is also employed in the separation of minerals. An inorganic substance having the formula Ca(NO3)2(H2O)x is calcium nitrate, popularly known as norgessalpeter (Norwegian Salpeter). The infrequently encountered anhydrous chemical turns into the tetrahydrate by absorbing moisture from the atmosphere. Salts come in both colorless anhydrous and hydrated forms. There are other uses for calcium nitrate besides being a component of fertilizers.
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Hexane is more likely to dissolve in octane rather than ethanol.
A. true
B. false
Answer:
The answer to your question is,
A. true
Explanation:
I hope this helps
I am sorry if I am wrong
Draw the addition products formed when one equivalent of hbr reacts with 2,4‑hexadiene. Draw a single product for each. Ignore stereochemical or chiral isomers.
The addition products formed after the reaction are 4-bromo-2-hexene and 2-bromo-3-hexene.
What happen when addition of Hbr to alkenes occur?The simplest type of electrophilic reaction to visualize is the addition of as haloacid such as Hbr to an isolated alkene.
The reaction starts between terminal carbon of the double bonds and H⁺. After attaching H⁺ to the carbon, one double bond disappears leaving nearby CH respectively charged. This intermediate is a resonance hybrid of two possible structures. Reaction of bromide at one of the carbons give the 1.2-addition product and at the other carbon gives 1,4-addition product.
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When performing a presumptive blood test with Hemastix, why is it necessary to test an unstained area close to the bloodstain under examination as a control?
When performing a presumptive blood test with Hemastix, the reason why it necessary to test an unstained area close to the bloodstain under examination as a control is that the likelihood that there is presence of blood, and thus need confirmatory test in lab to know if it is actually blood.
What is the presumptive test for Hemastix?Hemastix reagent strips were initially created for the purpose of detecting blood in urine. It has been determined that this quick and simple test is useful as a presumptive test for the presence of blood.
Note that the presence of a chemical in a sample can be determined or confirmed using a presumptive test, which is a qualitative study. These decisions are typically made following a chemical reaction that results in the production of a certain color. A false positive occurs when a different chemical reacts similarly and yields the desired outcome.
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What is the mass in grams of 5.90 mol C6H12?
The mass, in grams, of 5.90 mol [tex]C_6H_{12[/tex] would be 495.6 grams.
Number of moles of substanceThe number of moles in a given amount of substance is the ratio of the mass of the substance and its molar mass.
The statement of the number of moles of substances can be mathematically expressed as follows:
Mole = mass/molar mass
Making molar mass the subject, the equation becomes:
Molar mass = mass/mole
Making mass the subject, the equation becomes:
Mass = mole x molar mass.
In this case, we are looking for the mass of a given mole of [tex]C_6H_{12[/tex].
C = 12 g/mol
H = 1 g/mol
Molar mass of [tex]C_6H_{12[/tex] = (6x12) + (12x1)
= 72 + 12
= 84 g/mol
Hence:
Mass of 5.90 mol [tex]C_6H_{12[/tex] = 5.90 x 84
= 495.6 grams
In other words, 5.90 mol of [tex]C_6H_{12[/tex] would be equivalent to 495.6 grams of the compound.
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a gas cylinder has a volume of 108 L when filled with 22,700 grams of nitrogen gas if the temperature of this cylinder is 27 degrees what is the pressure inside the tank?
P=183.65 atm is the pressure inside the tank for the given conditions.
How is the pressure calculated?
Given,
V=108 L
m=22700 gm
The formula is PV=nRT
moles= [tex]\frac{Mass}{Molar mass}[/tex]
∴moles of [tex]N_{2}[/tex] = [tex]\frac{22700}{28}[/tex]=810.78 moles.
R=0.082 [tex]\frac{L atm}{molK}[/tex]
T=27°C=300K
P=[tex]\frac{nRT}{V}[/tex]
[tex]P_{N_{2}[/tex]=[tex]\frac{810.71 X 0.0821 X 298}{108}[/tex]
P=183.65 atm
The ideal gas law (PV = nRT) connects the macroscopic characteristics of ideal gases. A gas is considered to be perfect if its particles (a) do not interact with one another and (b) occupy no space (have no volume).
PV = nRT
PV = nRT is the equation for an ideal gas. In this equation, P stands for the ideal gas's pressure, V for the ideal gas' volume, n for the total amount of the ideal gas expressed in moles, R for the universal gas constant, and T for temperature.
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30 years ago, 22.5% of the population—45 out of 200 people—were taller than 1.2 meters. Currently, at least 1.2 meters tall people make up 50.5% of the population. Individuals who are under 1.2 meters tall have dramatically dropped throughout the course of the two years of data. This information lends credence to the claim that directed selection is taking place.
The evidence in the question shows that there is a directional evolution that is taking place as the percentage of the tall individuals is increasing.
What is directional selection?We know that the term natural selection implies that the organisms that are are better able to live and survive in a habitat are the ones that are able to live longer and reproduce and by so doing, they are able to transfer the favorable traits that they posses to their offspring.
Now we can also relate to the fact that the idea of directional selection is takin place when there is a situation in which the trend in the evolution seems to favor only one type of trait over another the other type of trait and this leads to a gradual increase in the abundance of the favored trait in the population.
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write the net ionic equation for the reaction that occurs when 0.087 mol hcl is added to 1.00 l of the buffer solution. use h3o instead of h .
The net ionic equation for the reaction that occurs NO2- + H3O+ = HNO2 + H2O
If HCl is added, then it reacts with the conjugate base of HNO2 means NaNO2.
The ionic equation via breaking all the soluble ionic compounds (the ones marked with an (aq)) into their respective ions. every ion has to be shown with its price and an (aq) to reveal that its miles are present inside the answer. Use coefficients to reveal the variety of every ion present.
A molecular equation is an equation wherein the formulation of the compounds is written as though all materials exist as molecules. An ionic equation is one wherein dissolved ionic compounds are proven as loose ions. Examples of molecular and ionic equations are proven.
Ionic equations and internet ionic equations are usually written most effectively for reactions that arise in answer and strive to show how the ions present are reacting.
If NaOH is added then it must react with the weak acid HNO2.
Thus, the net reaction contains NaNO2.
NaNO2 + HCl = HNO2 + NaCl
The ionic equation will be:
NO2- + H3O+ = HNO2 + H2O
(because it is given to use H3O+ instead of H+)
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calculate the concentration of h3o ions present in a solution of hcl that has a measured ph of 3.110 .
The concentration of H₃O⁺ present in a solution of HCL is 7.76247 × 10⁻⁴.
Since we know,
pH<7, therefore there are only H₃O+ particles in the solution.
[H₃O⁺ ] = [tex]10^{-pH}[/tex] = [tex]10^{3.110}[/tex] = 7.76247× 10⁻⁴
Pure water will have fewer hydroxide and hydronium ions. They can combine to form water. There will be a dynamic equilibrium between the concentration of molecules of water and ions. The definition of pH states that negative logarithms of hydronium ion concentration. The self-ionization will take place and increase the H⁺ concentration and side by side reduce the OH⁻ concentration.
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Determine the number of valence electrons and what the atoms charge will be when it forms an ion
A. O
B. As
C.N
D.AI
E.K
Please leave instructions.
The valence electron on O = 6, As = 5, N = 5, Al = 3, K = 1
Valence electrons are the electrons in the outermost shell, or energy level, of an atom. For example, oxygen has six valence electrons, two in the 2s subshell and four in the 2p subshell. We can write the configuration of oxygen's valence electrons as 2s²2p⁴.
Similarly we can see that the outermost orbit in As is 4[tex]s^{2}[/tex]4[tex]p^{3}[/tex] hence it has 5 valence electron and the charge on Arsenic ion is +5.
The outermost orbit in N is 2[tex]s^{2}[/tex]2[tex]p^{3}[/tex] hence it has 5 valence electron and the charge on Nitrogen ion is 3-
The outermost orbit in Al is 3[tex]s^{2}[/tex]3[tex]p^{1}[/tex] hence it has 3 valence electron and the charge on Aluminum ion is 3+
The outermost orbit of K is 4[tex]s^{1}[/tex] hence it has 1 valence electron and the charge on Potassium ion is 1+
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when 25 g of a hydrate of nickel chloride was heated, 11.37 g of water was released. determine the name and formula of the hydrate
The correct formula of the compound can now be written as [tex]NiCl_{2} .9H_{2} O[/tex]
What is the formula of the hydrate?We know that when we talk about a hydrate, we are talking about a compound that has some molecules of the water of crystallization in it. Thus we have that in this case, the compound that we are considering is nickel chloride.
Given that;
Number of moles of anhydrous salt = Number of moles of hydrated salt
Number of moles of hydrated salt = 25/130 + 18x
Number of moles of anhydrous salt = 11.37 g/130 g/mol
= 0.087 moles
When we now apply the formula, we have;
25/130 + 18x = 0.087 moles
0.087 (130 + 18x) = 25
11.31 + 1.566x = 25
x = 25 - 11.31 /1.566
x = 9
We now get;
[tex]NiCl_{2} .9H_{2} O[/tex]
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which feature does an iron metal have?responseselectrons shared between single pairs of atomselectrons shared between single pairs of atomsa sea of electronsa sea of electronsfirmly bonded electronsfirmly bonded electronselectrons that transfer between atoms to make cations and anions
Iron metal has a sea of electrons feature. The outside electrons form a sea or pool of delocalized electrons that are free to travel randomly throughout the fixed lattice of positive ions and do not "belong" to any particular atom.
What is iron metal?On the Periodic Table of the Elements, iron is a metal that belongs to Group 8 and is a hard, brittle substance. The most common metal, it is pure form, corrodes quickly when exposed into humid air and high temperatures. Iron is also considered to make up a significant portion of the Earth's core and is the fourth most prevalent metal by weight in the Earth's crust. According to the Los Alamos National Laboratory, it is abundant in the sun and stars in addition to being widely distributed on Earth. According to Jefferson Lab, iron is essential for the survival of all living things.
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