169.2K is the equilibrium temperature of the system after the insulating wall is removed.
What is equilibrium?Generally speaking, a condition of equilibrium is one in which nothing is changing. A body in equilibrium won't undergo any energy exchanges, either positive or negative. Equilibrium is defined significantly differently in biology, physics, and chemistry.
Yet the underlying idea is the same. A body in balance will be least affected by outside influences. Even when external pressures are present, the opposing forces often have a balanced impact on the item under consideration.
for gas, n1=1mol
T1= 148K
for solid,n2=2mol
T2=178K
for conservation of energy, ΔQ= Qgas+ Qsolid=0
Q= CvΔT
0=Cvgas(Teql-148) + Cvsolid(Teq-178)
0= 5/2×1×R(Teql-148) + 3×2×R(Teq-178)
Tequi= 169.2K
Therefore, 169.2K is the equilibrium temperature of the system after the insulating wall is removed.
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use the interactive to observe the reactions between various metals and metal cation solutions. determine whether a reaction occurs for each metal-metal nitrate solution pair.
Aluminum and Sodium Nitrate: No Reaction
What is sodium?Sodium is a chemical element found in nature as a silver-white metal. It is the sixth most abundant element in the Earth's crust, making up around 2.8 percent of the total mass of the crust. It is also one of the most important elements in human diet. Sodium is essential for many biological processes, such as maintaining water balance, transporting nutrients, and regulating nerve impulses. It can be found in many foods, such as table salt, dairy products, seafood, and processed foods. It is also an important component of many medications, such as antacids, diuretics, and blood pressure medications. Without adequate sodium in the diet, people may experience headaches, fatigue, muscle cramps, and other symptoms. Too much sodium in the diet, however, can increase the risk of high blood pressure, stroke, and heart disease.
Aluminum is more reactive than sodium, so a reaction will not occur when they are combined. Aluminum will not react with the sodium nitrate because sodium is not reactive enough to cause a reaction.
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b) How many moles of oxygen are needed to react with 3.5 moles Fe?
Answer:
2.625
Explanation:
The balanced chemical equation is needed to determine the mole-to-mole ratio of Fe to O.
4Fe + 3O2 -> 2Fe2O3
From the equation, 3 moles of O2 react with 4 moles of Fe. Therefore, the mole-to-mole ratio of O2 to Fe is 3:4.
To find how many moles of O2 are needed to react with 3.5 moles of Fe, we can use this ratio:
3.5 moles Fe × (3 moles O2 / 4 moles Fe) = 2.625 moles O2
Therefore, 2.625 moles of O2 are needed to react with 3.5 moles Fe.
Without checking the detailed numbers, please arrange the ionic compounds CsI, MgO, NaCl, and AlN in order of increasing lattice energy.
For the above compounds, the order of increasing lattice energy is MgO, NaCl, CsI, and AlN.
Which is ionic? MgO or NaCl?Because the ionic species in MgO have greater charge (Mg+2 and O2- as opposed to Na+ and Cl-), the ionic bond is stronger than it is in NaCl. As a result, MgO has greater ionic connections than NaCl. MgO is hence more ionic than NaCl.
whose MgO lattice energy is the highest?The size of the ions involved has an inverse relationship with lattice energy in ionic compounds. MgO has the highest lattice energy because Mg2+, the smallest of the four ions (because anion is the same in all), is present.
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Butylbenzene cannot be synthesized in good yield directly from benzene using a freidel-crafts alkylation. Propse an alternate synthesis of butylbenzene that does not use a freidel-crafts reaction.
Provide an alternative method for producing that does not employ a Related trades alkylation and can be done in good yields by starting with benzene.
A Craft is what?The trade of the carpenter. trades like sewing, carpentry, and ceramics; the craft of producing plays. Weaving, Quilting, Macramé, Lace-making, Knitting, and Tapestry Art.
A carpenter is what?You would be involved with the planning, chopping, and construction of furniture as a carpenter utilising various types of wood. Working on a job site, at a client's house, or in a shop are all options. They build, set up, and fix wooden furniture, doors, and window frames, among other things.
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leucine is an amino acid with the formula c6h13no2 c 6 h 13 no 2 . determine the number of moles of carbon in 57.77 g 57.77 g of leucine.
There are 3 moles of carbon in 57.77 g of leucine.
Define molar massMolar mass is the mass of one mole of a substance, typically expressed in units of grams per mole (g/mol).
To determine the number of moles of carbon in 57.77 g of leucine, we first need to find the molar mass of leucine.
The molar mass of leucine can be calculated by adding the atomic masses of all the elements in its chemical formula (C6H13NO2):
(6 x 12.01 g/mol) + (13 x 1.01 g/mol) + (1 x 14.01 g/mol) + (2 x 16.00 g/mol) = 131.18 g/mol Next, we can use the molar mass of leucine to convert the given mass of 57.77 g into moles:
57.77 g / 131.18 g/mol = 0.4408 mol
Finally, to determine the number of moles of carbon in 57.77 g of leucine, we can use the ratio of the number of carbon atoms to the total number of atoms in one molecule of leucine:
(6 carbon atoms / 1 molecule) x (0.4408 mol) = 2.645 moles of carbon
Therefore, there are 3 moles of carbon atoms in 57.77 g of leucine.
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an automobile tire has a pressure of 255 kPa (guage) in the summer when the tire temp after driving is 50C. what is the winter time pressure of the tire at 0C if the volume of the tire is considered the same and there are no leaks?
Assuming that the volume of the tyre does not change, and that air behaves as an ideal gas, find the gauge pressure of the air in the tyre.
What is volume ?
Volume is nothing but the quantity of area the container fills or holds. Volume is always in a dimensional space, especially three. A solid always has a definite shape. Volume is anything to be held, like solid, liquid, or gas. The volume should be in ml, l, and so on. Finding the volume to know the weight and depth of the container.
What is pressure ?
The pressure is nothing but the vital force applied to the object or particle. Pressure calculates how much force will be gone or extended to the object. Pressure is the force that is perpendicular to the power of extension. The standard unit of pressure is the pascal (pa). The formula for pressure, p= F/ A, p= pressure, F= magnitude, A= area of the surface
pressure is the scalar quantity. Pressure is also expressed in the term atmospheric pressure, atm.
Therefore, Assuming that the volume of the tyre does not change, and that air behaves as an ideal gas, find the gauge pressure of the air in the tyre.
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S(s) +2CO(g)—->SO2(g)+2C(s)+76kJ
Is the reaction exothermic or endothermic based on the equation in the relative number of moles
Answer:
exothermic
Explanation:
The negative sign of the enthalpy change (-76 kJ/mol) indicates that the reaction is exothermic, which means that energy is being released from the reaction into the surroundings.
Your second interpretation is also correct. The enthalpy term of -76 kJ/mol represents the heat change per mole of reaction as written. In terms of masses, for the given amounts of reactants and products, a mass of 32 g of sulfur reacts with 56 g of carbon monoxide gas to produce 64 g of sulfur dioxide and 24 g of carbon.
Which of the following qualities is most frequently used to measure the amount of a substance in a solution?
weight
shape
size
density
light absorbance
There are many methods which can be used to represent the concentration of a solution. Molarity, mole fraction, molality, etc. are used to represent the concentration of a solution. Here weight denotes the quantity of the substance. The correct option is A.
What is concentration?The concentration of a substance is defined as the quantity of the solute present in a given amount of the solution. The quantity of a solute is usually denoted as the weight of the solute. The method molarity is mainly based on the weight of the solute.
The amount of substance can be represented by weight and its units are gram and kilogram.
Thus the correct option is A.
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Describe a procedure for making rock candy using sucrose. At 20°C, the solubility of sucrose is 230.9 g/100 g H2O. At 50°C, it is 260.4 g/100 g H2O. At 100°C, it is 487 g/100 g H2O.
Answer:The solubility of a substance in water is defined as the maximum amount of solute that can be dissolved in 100 g of water at a given temperature. Hence, the solubility of sugar in water at 20â °C is 204 g.
Explanation:The solubility of a substance in water is defined as the maximum amount of solute that can be dissolved in 100 g of water at a given temperature. Hence, the solubility of sugar in water at 20â °C is 204 g.
Carbonyl fluoride, cof2 , is an important intermediate used in the production of fluorine-containing compounds. For instance, it is used to make the refrigerant carbon tetrafluoride, cf4 via the reaction.
The concentration of carbonyl fluoride (COF2) remains at equilibrium is 0.33M if only COF2 is present initially at a concentration of 2.00 M.
The reaction given is an equilibrium reaction, and so the reaction can be expressed in terms of the equilibrium constant (Kc).
The equilibrium constant (Kc) for the reaction is given as = 5.10.
[tex]2COF2(g) ,--- > CO2(g)+CF4(g)[/tex]
For an equilibrium reaction, the equilibrium concentration of the reactants can be determined using the following equation:
[tex]Kc = [CO2][CF4]/[COF2]^2[/tex] Where [CO2], [CF4], and [COF2] are the equilibrium concentrations of the respective species.
Rearranging the equation gives us the following expression:
[tex][COF2]^2 = [CO2][CF4]/Kc[/tex]
ICE chart is :
[tex]2COF2(g) < -- > CO2(g) + CF(g)[/tex]
I 2 0 0
C -2x +x +x
----------------------------------------------------------
E 2-2x x x
Plugging in the values given, we can calculate the equilibrium concentration of COF2:
[tex]Kc = (x)(x)/(2-2x)^2[/tex]
[tex]6.40 = x^2/(2-2x)^2[/tex]
Taking the square root of both sides, we can calculate the equilibrium concentration of COF2:
x = 0.835M
[COF2] = 2-2x =2 -2(0.835) = 0.33M
Therefore, if only COF2 is present initially at a concentration of 2.00 M, the concentration of COF2 at equilibrium will be 0.33 M.
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complete question: Carbonyl fluoride, COF2 , is an important intermediate used in the production of fluorine-containing compounds. For instance, it is used to make the refrigerant carbon tetrafluoride, CF4 via the reaction 2COF2(g)⇌CO2(g)+CF4(g), Kc = 6.40 . If only COF2 is present initially at a concentration of 2.00 M, what concentration of COF2 remains at equilibrium?
The empirical formula of p-dichlorobenzene is C3H2Cl. What is the molecular formula if its molar mass is 147 g/mol? Pls help I will give brainliest.
The molecular formula of p-dichlorobenzene is C6H4Cl2.
What is an empirical formula?The simplest whole-number ratio of the atoms in a compound is an empirical formula. In other words, it shows the relative number of atoms of each element in a compound, but not the actual number of atoms or the molecular structure. Empirical formulas are often determined by experimental data, such as the mass percentages of each element in the compound, and they are useful for comparing the compositions of different compounds.
The molar mass of the empirical formula can be calculated as follows:
C3H2Cl:
3C = 3 x 12.01 g/mol = 36.03 g/mol
2H = 2 x 1.01 g/mol = 2.02 g/mol
1Cl = 1 x 35.45 g/mol = 35.45 g/mol
Total molar mass = 73.50 g/mol
Now we can calculate the molecular formula by dividing the molar mass of the compound by the molar mass of the empirical formula, and then multiplying each subscript in the empirical formula by this number:
Molecular mass / empirical mass = 147 / 73.50 = 2
C3H2Cl x 2 = C6H4Cl2
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Calculate the average mass from the data set 1 5.455 2 5.495 3 5.453
The average mass from the given data set is approximately 5.4677.
What is average mass?An indicator of the central tendency of a collection of data reflecting item masses is average mass. It is also referred to as the arithmetic mean and is determined by adding the masses of all the objects in a dataset and dividing the result by the total number of objects in the dataset. In order to give a general idea of the normal mass of the objects in the collection, the average mass is employed. It is extensively employed in a variety of industries, including engineering and scientific research. In statistics, the idea of average mass is crucial since it allows for the conclusion- and decision-making-based analysis of big datasets. It offers a summary metric that is helpful for contrasting various data sets.
To calculate the average mass from the data set, we need to add up all the masses and then divide by the number of masses.
Adding up the masses:
5.455 + 5.495 + 5.453 = 16.403
Dividing by the number of masses (which is 3 in this case) gives us the average mass:
16.403 / 3 = 5.46766666667 (rounded to 11 decimal places)
Therefore, the average mass from the given data set is approximately 5.4677.
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A cylindrical barrel holds 10,164 cubic inches of oil (44 gallons). If the cylindrical barrel is 23 inches in diameter, what is the approximate height of the barrel?.
The approximate height of the barrel is 22.9 inches. They are also important in mathematics and engineering, as they are used to model and solve problems in various fields, such as calculus, geometry, physics, and fluid mechanics.
What is Cylinder?
A cylinder is a three-dimensional geometric shape that consists of two parallel, congruent circular bases connected by a curved surface. The curved surface is composed of a set of parallel lines that connect the two circular bases.
The cylinder can be described by several measurements, including its height (the distance between the two circular bases), its radius (the distance from the center of one circular base to its edge), and its diameter (the distance across the cylinder at its widest point, passing through the center of the circular bases).
We can use the formula for the volume of a cylinder to find the height of the barrel:
V = πr²h
We are given that the volume of the oil is 10,164 cubic inches and the diameter (which is twice the radius) is 23 inches.
r = 23/2 = 11.5 inches
10,164 = π(11.5)²h
Solving for h, we get:
h = 10,164 / (π(11.5)²) ≈ 22.9 inches
So the approximate height of the barrel is 22.9 inches.
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For the balanced reaction, how many molecules of CO2 are produced when 56 molecules of C6H6 react?
Which of the following electronic transitions represents an increase in energy in a multi-electron atom? A) 4s _ . 3d B) Sp _. 4d C) 4d _. Ss D) 4f _. 6s E) 5d
4f is the following electronic transitions represents an increase in energy in a multi-electron atom.
What is electronic transitions?
Electronic changes occur in atoms and molecules as a result of electromagnetic radiation absorption or emission (typically UV or visible). The electromagnetic wave's frequency and the energy change associated with a transition are coupled by the Planck equation's term E = h.
What is energy ?
It is possible for an electron to be free or linked to an atom. There are three main types of particles in an atom: protons, neutrons, and an electron that is bonded to an atom.
Therefore, 4f is the following electronic transitions represents an increase in energy in a multi-electron atom.
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write the net ionic equation for the reaction of zinc metal with aqueous copper(ii) nitrate. include physical states.
The net ionic equation for the reaction would be: Zn(s) + Cu(NO3)2(aq) → Cu(s) + Zn(NO3)2(aq)
Netw ionic equationIn this reaction, zinc metal (Zn) reacts with aqueous copper(II) nitrate (Cu(NO3)2) to form solid copper (Cu) and aqueous zinc nitrate (Zn(NO3)2).
Zn(s) + Cu(NO3)2(aq) → Cu(s) + Zn(NO3)2(aq)
To write the net ionic equation, we need to remove the spectator ions (ions that do not participate in the reaction and remain unchanged).
The complete ionic equation is:
Zn(s) + Cu2+(aq) + 2NO3-(aq) → Cu(s) + Zn2+(aq) + 2NO3-(aq)
The spectator ions are the two nitrate ions (NO3-), which appear on both sides of the equation. Therefore, we can eliminate them from the equation to obtain the net ionic equation:
Zn(s) + Cu2+(aq) → Cu(s) + Zn2+(aq)
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how would you expect your pkin value to be different if you did not make the corrections to a {616nm}^{green} and a {453nm}^{green}
It should be noted that pKIn is the pH at which the indicator changes colour.
What is pH?In chemistry, the pH scale is used to define the acidity or basicity of an aqueous solution. Formerly, pH stood for "potential of hydrogen." The pH values of acidic solutions are lower than those of basic or alkaline solutions.
pKIn is the pH at which the indicator changes colour. Also, you can get given the Ka value and told to work out the pH. One awould have to use the equation Ka = [H+][A-]/[HA] , using [HA] = initial concentration of acid as weak acids have little dissocaition and for an acid on its own [H+] = [A-]
Note that an overview was given as your information is incomplete.
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calculate the amount of energy available to a tertiary consumer in the following ecosystem: 150,000 j of energy produced by algae in the aquatic ecosystem
In an ecosystem, 0.0015 joules of energy is available to tertiary consumer in the aquatic ecosystem.
What is an ecosystem?Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
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Hydrochloric acid is usually purchased in a concentrated form that is 37. 0% % hcl h c l by mass and has a density of 1. 20 g/ml g / m l.
97ml of the concentrated stock solution in milliliters should you use to make 2.5 L of 0.500 M HCL.
We know that molarity can be expressed as,
C = n V
=> n = CV
The number of moles HCL required is,
= 2.5×0.5
=1.25
We have to find the grams. We get the value by multiplying by the weight of 1 mole of HCL which is equal to its mass required in grams.
Molar mass of HCL is 34.46.
So the mass required = 1.25×34.46 = 43.07grams
The concentrated form is 37.0% by mass. This means that the 100g of the concentrated solution contains 37.0g of HCL. So now we have to find the volume of concentrated solution will give us the mass we need. We have the 37.0g HCL in 100 g of concentrated solution. 1g is present in the 100/37.0g of concentrated solution.
43.07g is present in 100/37.0×43.07 is 116.40g of concentrated solution.
The density of the solution is 1.20g/ml
We know that, density = mass/volume
=> volume = mass/density
= 116.40 / 1.20
= 97 ml
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The complete question is,
Hydrochloric acid is usually purchased in concentrated form with a 37.0% HCL concentration by mass and a density of 1.20 g/ml. How much of the concentrated stock solution in milliliters should you use to make 2.5 L of 0.500 M HCL ?
if a solution is able to conduct electricity, which of the following compounds must be dissolved in it?
If a solution is able to conduct electricity,ionic compounds must be dissolved in it as it will generate ions.
What are ions?
An ion is defined as an atom or a molecule which has a net electrical charge. There are 2 types of ions :1) cation 2) anion . The cation is the positively charged ion and anion is the negatively charged ion . As they are oppositely charged they attract each resulting in the formation of ionic bond.
Ions consisting of single atom are mono-atomic ions while which consists of two or more ions are called as poly-atomic ions . They are created by chemical interactions . They are very reactive in their gaseous state and rapidly react with oppositely charged ions resulting in neutral molecules.
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Weak acids A. are almost insoluble in water, B. are of no value in a buffering system. C. are only partially ionized in an aqueous solution D. give solutions with a high pH. E do not provide hydronium ions
C. Weak acids are only partially ionized in an aqueous solution. When a weak acid is dissolved in water, only a fraction of the acid molecules will donate a proton to water to form hydronium ions, resulting in a solution with a lower concentration of hydronium ions and a higher pH compared to a strong acid with the same concentration.
What is Aqueous Solution?
An aqueous solution is a solution in which the solvent is water. In such a solution, water molecules surround and interact with the solute ions or molecules. Aqueous solutions are very common in nature and are widely used in chemistry, biology, and industry. For example, the fluids in our bodies are aqueous solutions, and many chemical reactions occur in aqueous solutions. The properties of aqueous solutions, such as their acidity or alkalinity, electrical conductivity, and freezing point, depend on the nature and concentration of the solute dissolved in the water.
Weak acids are substances that do not completely dissociate into ions in aqueous solutions. Instead, they exist as a mixture of ions and undissociated molecules in a dynamic equilibrium. This means that only a fraction of the acid molecules dissociate into their respective ions, while the rest remain undissociated.
Because of this partial dissociation, waek acids are not strong sources of hydronium ions (H3O+), which determine the pH of a solution. Instead, they provide a buffer system that can help resist changes in pH when small amounts of acid or base are added to the solution.
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What do weather fronts separate?
a
the troposphere and mesosphere
b
air masses of different densities
c
the troposphere and stratosphere
d
air masses of different altitudes
Different-density air masses are divided by weather fronts. A weather front is an area of difference in temperature, moisture content, and density between two air masses.
What are weather fronts and air masses?A weather front is a place on the planet's surface where two different air masses collide. Where two different air masses converge, or at a front, turbulence usually occurs.
The mesosphere is split in what ways?The region where the mesosphere and thermosphere converge is known as the mesopause. Near the base of the mesosphere is the stratopause, which delineates the boundary between the stratosphere and the mesosphere.
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What questions might a scientist ask about the structure of the atom based on these discoveries?
Thin sheets of gold foil were bombarded with positively charged alpha particles. Most alpha particles passed right through the foil. However, a handful of them were dispersed in various directions.
What is atom renowned for?The fundamental component of chemistry is the atom. It is the smallest piece of matter that can be separated without releasing electrically charged particles. It is also the smallest piece of stuff with the characteristics of a chemical element.
Why was atom discontinued?We've made the decision to retire Atom in addition to further our dedication to bringing quick and dependable software development to the internet via Microsoft Visual Studio Code & GitHub Codespaces, even though the goal of expanding the software maker community still exists.
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chromosomes genes To determine how different medicines will affect her, the lab tested several that contain coding for certain traits, including allergies to medications. This genetic material is on structures called that get passed on from generation to generation. chromatids cells .
To determine how different medicines will affect her, the lab tested several genes that contain coding for certain traits, including allergies to medications. This genetic material is on structures called chromosomes that get passed on from generation to generation.
How can genetics be tested ?To determine how different medicines will affect a person, genetic testing can be conducted to analyze specific traits and potential allergies to certain medications.
In the context of genetic testing, chromosomes are typically analyzed to look for genetic variations or mutations that may impact the way an individual metabolizes certain medications.
The genetic material that contains information about traits and allergies is carried on structures called genes, which are located on chromosomes.
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How many kilograms (kg) are in 1.544 micrograms (ug)? (Enter number value only. Do not include
units)
The number of kilograms in 1.544 micrograms (ug) is 1.544 × 10-⁹ kilograms.
How to convert micrograms to kilograms?Kilograms is the unit of mass according to the International System of Units (S.I unit). The base unit of mass; conceived of as the mass of one litre of water.
Micrograms is the unit of mass equal to one millionth of a gram, or 0.000001 grams (symbol: μg or mcg).
The unit of conversion of micrograms to kilograms is as follows:
1 microgram = 1 × 10-⁹ kilogram
This means that 1.544 micrograms can be converted to kilograms as follows:
1.544 ug × 1 × 10-⁹ = 1.544e-9
Therefore, 1.544 ug is equivalent to 1.544 × 10-⁹kg
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If a mixture of 50% liquid water and 50% ice is at zero degrees Celsius, which of the following will change if a small amount of heat is added to the mixture? (There may be more than one correct answer.) a. A small amount (not all) of the ice will melt.
b. The ratio of liquid to solid water will increase.
c. The temperature of the mixture will increase. d. The melting point for the remaining solid ice will change.
Due to the latent heat of fusion, when a modest amount of heat is added, ice will transform into water without changing the temperature. Therefore, a portion of the ice may melt (but not all of it). The right answer is A.
What exactly is fusion?The sun and stars are both powered by fusion. Fusion is the process by which two hydrogen atoms join, or fuse, to create a helium atom. Throughout the process, a portion of both the hydrogen's energy is converted into energy.
What takes place when fusion?When multiple light nuclei combine by fusion, a heavy nucleus is produced. The process results in the production of energy because as the size of the single nucleus that forms is less than the sum of the masses of the two original nuclei. Every leftover mass is transformed into energy.
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How many moles of lead (IV) nitrate will be needed to produce 175 grams of lithium nitrate, assuming that you have an excess of lithium sulfate to complete the reaction?
Pb(NO3)3 + 2 Li2SO4 --> Pb(SO4)2 + 4 LiNO3
The limiting Reagent, in my opinion, is Lead IV Sulfate. This reagent must be present for the reaction to take place, and once it does, it is completely consumed. The reaction would come to an end if there was not enough of the limiting reagent.
Pb(SO4)2 Lead IV Sulfate
Pb: 207.2
S: 32.07(2) -> 64.14
O 1600(4) -> 64.00 (2)= 128
=399.34 g/mol
LiNO3 Lithium Nitrate
Li: 6.941
N: 14.01
O: 16.00(3) -> 48.00
=68.951 g/mol
LiSO4 Lithium Sulfate
Li: 6.941
S: 32.07
O: 16.00 (4) -> 64.00
= 103.011 g/mol
Ratio of LiNO3 to LiSO4 (Lithium Nitrate: Lithium Sulfate) 4LiNO3: 2Li2SO4.
The ratio is 4:2, so we will need 4 moles of Lithium Nitrate to react completely with Lead IV Sulfate to produce 2 moles of Lithium Sulfate.
1 mole of Lithium Nitrate is 68.951 g/mol.
1 mole of Lithium Sulfate is 103.11 g/mol.
250 grams (given value from word problem) /68.951 g/mol= 3.62 moles
3.62 moles Lithium Nitrate/4 moles= .905 x 103.11 g/mol= 93.3 grams Lithium Nitrate
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Which compound is a strong electrolyte?
Please choose the correct answer from the following choices, and then select the submit answer button.
Answer choices
Be(OH)2
BeS
Be3(PO4)2
Be(NO3)2
Be(OH)₂ compound is a strong electrolyte.
What is strong electrolyte?A solid or liquid that totally or almost completely ionises or dissociates in a solution is considered a strong electrolyte. In the solution, these ions function well as electrical conductors. An early definition of a "strong electrolyte" was a substance that is an effective conductor of electricity when dissolved in water. Strong electrolytes are those that totally dissociate or ionise when placed in aqueous solution. These electrolytes have a high electrical conductivity and a greater ionisation extension. NaCl, HCl, NaOH, etc. are a few examples.
Correct option: Be(OH)₂
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You must determine the moles of calcium chloride necessary to react with all of the unknown carbonate. If you have 0.335 grams of unknown carbonate with a molar mass of 127.330 g/mol, what is the minimum moles of calcium chloride necessary?
The minimum moles of calcium chloride necessary to react with all of the unknown carbonate is 0.0026 mol.
What is carbonate?Carbonate is a compound containing an anion of carbonate (CO3) and a cation of a metal, such as sodium, calcium, or magnesium. Carbonates are compounds of carbon and oxygen, and are found in many mineral forms, including limestone, marble, chalk, and dolomite. Carbonates are widely used in the construction, food processing, and chemical industries, and are also important components of soil and sediments.
The first step is to calculate the number of moles of carbonate present in the sample. This is done by dividing the mass of the sample by the molar mass of the carbonate:
0.335 g / 127.330 g/mol = 0.0026 mol
Next, we need to calculate the moles of calcium chloride needed to react with all of the carbonate. Since the reaction is a 1:1 ratio, we need the same number of moles of calcium chloride as the moles of carbonate present in the sample:
0.0026 mol CaCl2 = 0.0026 mol
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Hello If u have time po pa help nman uncle jong answer some exercise thanks
The absorbance of a sample of the solution is 0.74, which is equivalent to the molar absorptivity of the Co2+(aq) solution, which is 4.48 x 10⁴ L/mol-cm.
What is moles?Moles are small, burrowing mammals found throughout much of the world. They have a cylindrical body, covered in short, velvety fur, and stocky legs. They have a rounded snout and small eyes, and their fur is usually black, brown, or gray. Moles feed mainly on earthworms, insects, and grubs, and use their powerful front paws to dig extensive tunnel systems in gardens and lawns. Moles are solitary creatures, living and foraging alone, and they are active both day and night.
This can be used to calculate the [Co2+] in the solution.
[Co2+] = Absorbance / (Molar absorptivity x Sample path length)
[Co2+] = 0.74 / (4.48 x 10^4 L/mol-cm x 0.0500 L)
[Co2+] = 0.0164 M
The number of moles of Co2+(aq) in the 50.00 mL solution can be calculated using the following equation:
Moles Co2+ = [Co2+] x Volume
Moles Co2+ = 0.0164 M x 0.050 L
Moles Co2+ = 8.20 x 10⁻³ mol Co2+
The mass percent of Co in the 0.630 g sample of the ore can be calculated using the following equation:
Mass percent Co = (Mass of Co2+ x 100) / Mass of sample
Mass percent Co = (8.20 x 10⁻³mol Co2+ x 58.93 g/mol Co2+) / 0.630 g
Mass percent Co = 5.04%
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