The molar mass of the diprotic acid is 212 grams/mol.
Perimeter
Mass of a diprotic acid = m₂ = 0.2046 gThe general formula H₂A Volume of NaOH = V₁ = 18.55 mL = 0.01855 LMolarity of NaOH = M₁ = 0.1040 MCalculate the mole of a diprotic acid
n NaOH = M₁ × V₁Calculate the molar mass
[tex]n_2 = \frac{m_2}{M_2}[/tex]
[tex]M_2 = \frac{m_2}{n_2}[/tex]
[tex]M_2 = \frac{0.2046}{0.0009646}[/tex]
M₂ = 212 g/mol
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how does gravity influence the motion of objects in the solar system
state any three properties that can be used to classify elements
Answer:
The elements on the Periodic Table have been organized into groupings based on the chemical and reactive properties of the elements. The three major groups are the metals, nonmetals, and metalloids. The metals towards the left and lower parts of the Table tend to give up electrons in chemical bonding. The nonmetals to the right and upper parts of the Table tend to accept electrons in chemical bonding. The metalloids some say have an identity crisis and are a band of elements in between the metals and nonmetals which can show characteristics of the bordering groups depending on the type of bonding or chemical reaction. This group is also the foundation of our semiconductor, integrated circuit industries.Other groupings of the elements are into "families" based on the chemical nature of the elements. Some of these are the alkali metals, alkaline earth metals, transition metals, chalcogens, halogens, and inert/noble gases. There is also a semi-grouping of elements above atomic number 83 as these tend to be unstable and show natural radioactivity. Additionally, one could group the elements based on their physical states at room temperatures, such as solids, liquids, and gases.
In all both, chemical and physical properties are used to classify and group elements into useful associative collections based on these attributes. It simply depends on the purpose for the classification.
the molecular mass of butanoic acid is 88.1 amu . calculate the molecular mass of ethyl acetate, an isomer of butanoic acid. express your answer with the appropriate units.
The molecular mass of ethyl acetate is 88.1 amu.
The structure formula of butanoic acid is CH3CH2CH2COOH, while structural formula of ethyl acetate is CH3COOCH2CH3. Thus, both butanoic acid and ethyl acetate have same number of constituent atoms. Therefore they have same atomic mass. Thus, molecular mass of ethyl acetate is 88.1 amu.
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molar mass of Mg(OH)2 in g/mol
Answer:
2× Ar(O) + Ar(H) ×2 =58,3197 g/mol
a chemist measured the amount of beryllium sulfide produced during an experiment. she finds that of beryllium sulfide is produced. calculate the number of moles of beryllium sulfide produced.
The moles of BeS produced is 0.20231 mol.
molecular weight of Be = 9.01 g/mol
molecular weight of S = 32.065 g/mol
Thus, the molecular weight of beryllium sulfide is equal to:
molecular weight of BeS = 9.01 + 32.065 = 41.075 g/mol
The number of moles will be equal to: 8.31*(1/41.075) i.e., 0.20231 mol.
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The 18th-century chemist Antoine Lavoisier and his wife Marie-Anne put fruit into a glass container, and then they sealed it. After weighing the fruit and container, they left it in a warm place for a few days. The fruit decayed, and there was condensation inside the glass and gas in the container. Lavoisier and his wife weighed the decayed fruit and the container again. The weight was the same. What scientific principle did the Lavoisier's experiment support?
Explanation:
The 18th-century chemist Antoine Lavoisier and his wife Marie-Anne put fruit into a glass container, and then they sealed it. After weighing the fruit and container, they left it in a warm place for a few days. The fruit decayed, and there was condensation inside the glass and gas in the container. Lavoisier and his wife weighed the decayed fruit and the container again. The weight was the same. What scientific principle did the Lavoisier's experiment support?
Is boiling or evaporation of water more common on earth
by using photons of specific wavelengths, chemists can dissociate gaseous hi to produce h atoms with certain speeds. when hi dissociates, the h atoms move away rapidly, whereas the heavier i atoms move more slowly. if a photon of 248 nm is used, what is the excess energy (in j) over that needed for dissociation? enter your answer in scientific notation.
The excess energy needed for the dissociation of the HI atom is 3.102 x 10⁻¹⁹ J
The wavelength of the photons used to dissociate the HI molecule is 248 nm.
The energy of the photon is given by,
E = hc/λ
Where,
H is Planck's constant,
c is the speed of light,
λ is the wavelength of the photon,
Putting values,
E = 6.62 x 10⁻³⁴ 3 x 10⁸/248 x 10⁻⁹
E = 8 x 10⁻¹⁹ J.
The bond energy required to dissociate the HI atom is 4.898 x 10⁻¹⁹ Joules.
The excess energy is given by,
E = 8 x 10⁻¹⁹ - 4.898 x 10⁻¹⁹
E = 3.102 x 10⁻¹⁹ J.
so, the excess energy needed is 3.102 x 10⁻¹⁹ J.
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a 40.0 ml sample of 0.25 m koh is added to 60.0 ml of 0.15 m ba(oh)2 . what is the molar concentration of oh- (aq) in the resulting solution? (assume that the volumes are additive.)
A 40.0 ml sample of 0.25 m KOH is added to 60.0 ml of 0.15 m Ba(OH)₂. the molar concentration of OH⁻ ion in the resulting solution is 0.28 M.
Given that :
volume of KOH = 40 mL = 0.04 L
Molarity of KOH = 0.25 M
volume of Ba(OH)₂ = 60 mL = 0.06 L
molarity of Ba(OH)₂ = 0.15 M
moles of OH⁻ in KOH = 0.04 × 0.25 = 0.01
moles of OH⁻ in Ba(OH)₂ = 2 (0.06 × 0.15) = 0.018
total no. of moles = 0.01 + 0.018 = 0.028 mol
total volume = 0.04 + 0.06 = 0.1 L
molarity of OH⁻ ion = moles / volume
= 0.028 / 0.1
= 0.28 M
Thus, A 40.0 ml sample of 0.25 m KOH is added to 60.0 ml of 0.15 m Ba(OH)₂. the molar concentration of OH⁻ ion in the resulting solution is 0.28 M.
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5. What are the coefficients when the equation below is balanced?
_H₂+_0₂→--H₂O
O 1,1,2
O 4,3,1
O 2,1,2
0 2,2,1
Answer:
C.) 2,1,2
Explanation:
You have to balance the equation by getting the number of elements on the left and right side to equal. Before balancing there is one more oxygen on the left side than the right side. You have to change the coefficient in front of H2O to fix this, and that means adding a "2" in front of the H2 to get that to equal as well.
You end up with 2H₂+10₂→ 2H₂O
What is the volume in liters of hydrogen gas that would be produced by the reaction of 55.0 g of Al with excess HCl at STP according to the following reaction?
2 Al (s) + 6 HCl (aq) → 2 AlCl₃ (aq) + 3 H₂ (g)
Answer:
About 68.495 L hydrogen gas
Explanation:
a solution is made using 200.0 ml of methanol (density 0.7920 g/ml) and 567.1 ml of water (density 1.000 g/ml). what is the mass percent of the methanol?
The mass percent of the methanol is 21.83%.
The parameter
Methanol volume = 200.0 mlThe density of methanol = 0.7920 g/mlWater volume = 567.1 mlThe density of water = 1.000 g/mlCalculate the mass of methanol and water.
[tex]\rho = \frac{m}{V}[/tex]
m = ρ × V
Where m is a mass (kg), ρ is the density (kg/m³), and V is volume (m³)
m₁ = mass of methanol = 0.7920×200.0Mass percent of the methanol
= [tex]\frac{mass \: of \: methanol}{mass \: of \: solution} \times 100\%[/tex]
= [tex]\frac{m_1}{m_1 + m_2} \times 100\%[/tex]
= [tex]\frac{158.4}{158.4 + 567.1} \times 100\%[/tex]
= [tex]\frac{158.4}{725.5} \times 100\%[/tex]
= 0.2183 × 100%
= 21.83%
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acid h2x gives two h ions. a 1.70 g sample of h2x reacts completely with 40.0 ml of 0.450 m naoh solution. what is the molar mass of h2x?
The acid h₂x gives two h ions a 1.70 g sample of h₂x reacts completely with 40.0 ml of 0.450 M NaOH solution, the molar mass of h₂x is 188.8 g/M.
How is molar mass calculated?Volume = 40ml = 0.04 L
mass of NaOH = 0.450 M
moles of NaOH = mass × volume
= 0.450 × 0.04
Therefore, moles of NaOH is = 0.018
The no. of moles required in the reaction:
H₂X(aq) + 2NaOH(aq) ⎯→ Na₂X(aq) + 2H₂O(l)
Now, moles of NaOH is [tex]\frac{0.018}{2}[/tex] which is equal to 0.009
We know,
molar mass of H₂x = mass of H₂x / moles of NaOH
= 1.70 / 0.009
= 188.88 g/M
The molar mass of H₂x is 188.8 g/M
What is molar mass?Molar mass of is defined as the mass of a substance in the gram of one mole of compound.
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What is the purpose of the glass heat shield? Why is it important?
A heat shield is essentially a thermal barrier intended to keep things from overheating. The automotive industry to isolate the engine block to stop heat damage to the bodywork and internal parts.
What is a heat shield used for?A heat shield is essentially a thermal barrier intended to keep things from overheating. They are frequently employed in the automotive industry to separate the engine to stop heat damage to the bodywork and internal parts.
What occurs if a heat shield is absent?If the heat becomes too high, plastic engine parts may melt or deform, and belts may also become damaged. You should schedule a visit with your mechanic right away if you start to smell burning emanating from your car or discover that the engine hood is too hot to touch.
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under standard conditions, what is the pressure of the carbon dioxide and the ph of the water? at 1 atm
ph = 1.5E.8 and pressure = 44.64 kj/mol of carbon dioxide.
Pressure is defined as the force perpendicular to an object's surface divided by the area across which it is dispersed.
Overpressure is the pressure that exists in comparison to the atmospheric pressure. To express pressure, various units are employed. Manometer, differential, and absolute pressure measurements are the three methods available.
Absolute pressure is defined in terms of vacuum pressure. l. Water's pH level reveals how basic or acidic it is. 7 serves as a neutral value in the range of 0 to 14, with. A pH value more than 7 indicates basicness, and a pH value less than 7 indicates acidity. In actuality, the pH scale gauges the percentage of free hydrogen and
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How many spaces have been left for the possible discovery of new elements?
this is the answer to ur question hope is helpful
Which example involves the transformation of chemical enegy directly to light energy?
1.A glow stick
2.Photosynthesis
3.Windmill
4.A hydroelectric dam
A glow stick is an example of a device that directly converts chemical energy into light energy.
A) A glow stick generates luminance, or light energy, using chemical energy from the compounds contained within it. When the stick is broken or twisted, the chemicals inside it are released and, through a chemical reaction, chemical energy is transformed into light energy.
B) plants employ light energy during photosynthesis to create oxygen and energy in the form of sugar (glucose).
C) The wind serves as the energy source for a windmill, and when the rotor blades revolve, the wind energy is transformed into mechanical energy. Then, electrical energy is created from that mechanical energy. The light energy produced by these electrical currents is subsequently employed in lamps. As a result, the chemical energy is not changed directly.
D) Water provides mechanical energy to a hydroelectric dam. When the water reaches the turbine, the gravitational potential energy that it had because of its height is transformed into kinetic energy. Then electrical energy is created from this kinetic energy.
Therefore, Glow Stick is the sole example where chemical energy is transformed into light energy in this manner.
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One volume of chlorine gas measured at STP would be liberated by the current of 2.5 ampere flowing for a period of 1.8 hours through an aqueous solution of silver chloride
The volume of chlorine gas produced at STP by the current of 2.5 amperes flowing for a period of 1.8 hours through an aqueous solution of silver chloride is 1.504 L.
What are the moles of chorine gas that are liberated at STP by passing a given current through an electrolyte containing chloride ions?The moles of chorine gas that are liberated at STP by passing a given current through an electrolyte containing chloride ions is determined from the equation of the oxidation reaction that occurs when chlorine gas is liberated from chloride ions.
The equation of the oxidation reaction is given below:
2 Cl⁻ ---> Cl₂ (g) + 2 e
From the equation of reaction, two moles of electrons liberated 1 mole of chlorine gas.
The volume of 1 mole of chlorine gas = 22.4 L
Quantity of current in 2 moles of electrons = 2 * 96500 C
Quantity of current in 2 moles of electrons = 193000 C
Quantity of current in 2.5 amperes flowing for a period of 1.8 hours = 2.5 * 1.8 * 3600
Quantity of current in 2.5 amperes flowing for a period of 1.8 hours = 12960 C
The volume of chlorine gas produced = 12960 * 22.4/1930000
The volume of chlorine gas produced = 1.504 L
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Complete question:
What volume of chlorine gas measured at STP would be liberated by the current of 2.5 amperes flowing for a period of 1.8 hours through an aqueous solution of silver chloride?
a 200. g sample of a metal is heated to 54 degrees celsius and then dropped into 119. g of water in a calorimeter. the temperature of the water rises from 21.0 degrees celcius to 41.0 degrees celcius. what is the specific heat of the metal (j/g.k)?
The specific heat of given metal is 3.83 j/g.k
What is specific heat?Specific heat, the amount of heat required to raise the temperature of 1 gram of a substance by 1 degree Celsius. Units of specific heat are usually calories or joules/grams . Celsius.
Considering:
Heat gain by water = Heat lost by metal
Qₐ = Qₓ
mₐ cₐ (T₂ - T₁) = mₓ cₓ (Tₙ - T₂)
Where, mₐ = 119 g (mass of water)
cₐ = 4.186 j (specific heat of water)
T₂ = 41.0°C (final temperature of water)
T₁ = 21.0°C (initial temperature of water)
mₓ = 200 g (mass of metal)
cₓ = specific heat of metal
Tₙ = 54°C (Initial temperature of metal)
Now, substitute the values in the equation mentioned above,
119 × 4.186 × (41.0 - 21.0) = 200 × cₓ × ( 54 - 41.0)
9962.68 = 2600 cₓ
cₓ = 3.83 j/g.k
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in aqueous solutions, excess hydrogen ions bind to nearby water molecules, so it is generally considered more accurate to write h (aq) as h3o (aq). what is the name of the h3o ion?
In aqueous solutions, excess hydrogen ions bind to nearby water molecules, so it is generally considered more accurate to write h (aq) as H₃O (aq) then name of the H₃O ion is hydronium ion
The hydrogen ion in aqueous solution is no more than proton and a bare nucleus although it carries only a single unit of positive charge and this charge is concentrated into a volume of space that is only about a hundred million as large as volume occupied by smallest atom in case of water this will be the lone pair electron of the oxygen atom and the tiny proton will be buried within the lone pair and will form a shared electron bond with it and creating a hydronium ion means H₃O⁺ and here H₂O is the base and the product H₃O⁺ is the conjugate acid of water
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the 2s and 2p sublevels are very close in energy, as are the 3s and 3p sublevels. explain how the orbital diagram for sodium confirms that the 3s sublevel is lower in energy than the 3p sublevel
The 2s and 2p sublevels are very close in energy, as are the 3s and 3p sublevels. The s sublevel is located lower on the page than the p sublevel.
Chemical bonds within substances contain energy. Exothermic reactions are those that release heat as well as chemical energy during the course of a reaction. The quantum theory defines a sublevel as an energy level. Sublevels in chemistry describe electron-related energies. Sublevels in physics can also refer to nuclear energy levels. A single orbital that can accommodate up to two electrons makes up the s-sublevel. Spherical best describes it. Since it is smaller than the 2s, which is smaller than the 3s, and so on, the 1s is the particle closest to the nucleus. 3 identical orbitals that resemble make up the p-sublevel.
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gas of unknown molecular mass was allowed to effuse through a small opening under constant pressure conditions. it required 57 s for 1.0 l of the gas to effuse. under identical experimental conditions it required 26 s for 1.0 l of o2 gas to effuse. calculate the molar mass of the unknown gas.
The molar mass of the other gas is 153.79 g/mol
Step 1: The Data given,
It required 57 s for 1.0 L of the gas to effuse.
Under identical experimental conditions it required 26 s for 1.0 L of O2 gas to effuse.
Step 2: Calculate the molar mass
Graham's law of effusion says:
r1/r2 = √(M2/M1)
⇒ with r1 = effusion rate 1 = L/57s
⇒ with r2 = effusion rate 2 = L/26s
⇒ with M1 = molar mass of the gas = x g/mol
⇒ with M2 = molar mass of oxygen = 32 g/mol
We should be careful if we plug in the effusion rate. Because the fractions could flip if we don't give the effusion rates as numeral values.
(L/57s)/(L/26s) = 26/57 = √(32/M1)
26/57 =√(32/X)
(26/57) ² = 32/X
0.208064 =32/X
X = 32/0.208064
X = 153.79 g/mol
Hence, The molar mass of the other gas is 153.79 g/mol
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Consider this reaction: A₂ + 6B --> 2AB, If B is being consumed at a rate of -3 mol/min, what rate is A being consumed?
A aggregate response is a response wherein or greater materials integrate to shape a unmarried new substance. Combination reactions also can be referred to as synthesis reactions. The standard shape of a aggregate response is: A+B→AB.
One aggregate response is factors combining to shape a compound. When or greater reactants integrate with every different to shape a brand new product it's miles referred to as as aggregate response. Combination response is likewise referred to as synthesis response. For instance hydrogen receives mixed with chlorine to from hydro-chloride.
A aggregate response is a response wherein reactants integrate to shape one product. Oxygen and the halogens are very reactive factors and are probable to go through aggregate reactions with different factors.
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Not enough data is given and i cant find a similar question.
water dissolves salts because it: select one: a. is hydrophobic, and salts are also hydrophobic. b. forms covalent bonds with the atoms of the salt crystal. c. has partial positive and negative charges. d. evaporates quickly at room temperature.
Salts get dissolved in water because it has partial positive and negative charges. So option (c) is correct.
Why does salt dissolves in water?The water molecules pull the Na and Cl ions apart while breaking the ionic bond which held them together. After the salt ions are pulled apart, they get surrounded by water molecules. The salt dissolves to form a homogeneous solution.
The slightly positive portion of sodium is attracted to the slightly negative portion of oxygen on the water molecule. At the same time, the slightly electronegative chlorine moieties of NaCl are attracted to the slightly electropositive hydrogen moieties of water.In either case, no true bond is formed, the stronger covalent bonds of water (also commonly held by hydrogen bonds between water molecules) win, NaCl gets pulled apart, resulting in dissociation of Na+ and Cl- ions with the Na+ and Cl- ions setting loosely in place between the intact H₂O molecules. NaCl is then dissolved.Salts are ionic and are expected to dissolve in water because water itself is polar. Therefore, ionic salts are expected to dissolve in polar solvents.
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mass of methane will occupy the same volume as 0.0325 mol 0.0325 mol of propane at 1.00 atm 1.00 atm and 298 k?
5.18 grams of methane will occupy same volume as 0.0325 moles of propane.
The ideal gas equation says,
PV = nRT
Where,
P is pressure, V is volume, n is moles, R is gas constant, T is temperature.
Moles of propane is 0.0325 moles.
volume of propane at 1 atm and 298 K is,
V = nRT/P
V = 0.0325 x 0.082 x 298/1
V = 7.92 L
Volume of propane is 7.92 L.
we know, moles = mass/molar mass.
Molar mass of Methane is 16g/mol.
Moles of methane = mass/16
Volume of methane,
V = nRT/P
7.92 = mass x 0.082 x 298/16
Mass = 5.18grams.
So, 5.18 grams of methane will have same volume as that of 0.0325 moles of propane.
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1.explain why a polar aprotic solvent is used for this reaction? what is the polar aprotic solvent that is used?
Polar aprotic solvents are those solvents which have not acidic proton and polar nature.
Polar aprotic solvents are used in SN1 mechanism because these solvated both carbocation and anion .
The SN1 reaction mechanism follows a stepwise process in which the carbocation is first formed by removal of a leaving group. The carbocation is then attacked by a nucleophile. Finally, the protonated nucleophile is deprotonated to yield the desired product.
Thus, polar protic solvents help stabilize both carbocations and anions, and solvation of both cations and anions aids the progression of the SN1 mechanism. Therefore, polar protic solvents favor the SN1 mechanism.
Polar aprotic solvents are solvents that do not have acidic protons and are polar. Such solvents lack hydroxyl and amine groups. Many solvents, including chlorocarbons and hydrocarbons, can be classified as aprotic, but polar aprotic solvents are of particular interest due to their ability to dissolve salts.
examples: Actone , ethyl acetate
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question: methanol, ch4o, is finding use as a fuel additive. describe the effect of each of the following changes on the equilibrium mixture for the combustion of methanol: a. adding more co2(g) b. adding more o2(g) c. increasing the temperature d. adding a catalyst
On adding more CO2 equilibrium shifts to left, adding more oxygen the equilibrium shift to right, increasing a temperature will shift the equilibrium to left and adding the catalyst will not affect the equilibrium.
According to Heisenberg Uncertainty Principle, if the equilibrium of a system of reaction is disturbed by making any changes in the property the reaction will shift into that direction by itself that stabilizes the equilibrium again.
According to the reaction,
CH4O + O2 = H2O + CO2 + Heat
a. Adding more CO₂ will shift the reaction towards the left side or we can say that adding carbon dioxide into the system will shift the reaction towards the reactant side. Because the concentration of carbon dioxide on the product side has increased, the equilibrium is disturbed so in order to stabilize the equilibrium again the reaction will shift towards the reactant side.
b. Adding more oxygen means that we are adding more amount of reactants which disturbs the equilibrium of the reaction so to stabilize the equilibrium again the reaction will shift towards the product side.
c. Increasing the temperature of the equation means that we are giving heat to the system which means that the equation or the system will shift toward the product side because the reaction is exothermic in nature.
d. Adding a catalyst will not affect the equilibrium of the reaction it will only increase the rate of the reaction.
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saline solutions are often administered intravenously to patients. if a saline solution is 0.450% sodium chloride by mass, what is the molarity of na in the saline solution? assume the saline solution has a density of 1.005 g/ml.
The the the molarity of na in the saline solution of nacl in the saline solution was 0.077 M.
Molar concentration is a measure of the concentration of a chemical species, especially of a solute in a solution, in terms of the amount of substance according to the unit quantity of the solution. In chemistry, the most normally used unit for molarity is the variety of moles according to liter, having the unit symbol mol/L or mol/dm³ in the SI unit.
Calculation:-
0.45% NaCl by mass
Density = 1.005 g/ml
0.45g NaCl in a total mass of 100 g
100 g in ml = 100/1.005 mL
= 99.50 ml
0.450 g NaCl in moles = 0.450 /M nacl
= 0.450/58.44
= 7.70 × 10⁻³ mol
Molarity of NaCl = 7.70 × 10⁻³ /99.50 × 100
= 0.077 M
Molarity (M) is the quantity of a substance in a sure volume of answer. Molarity is defined because the moles of a solute according to liters of a solution. Molarity is also called the molar awareness of a solution.
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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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Help!!
Predict the missing component in the nuclear equation.
Answer:
the missing component is the option (a) electron
Explanation:
this is a nuclear decay of Th which resulted in the emission of alpha particles, equivalent to high speed electrons.