Answers
Answer:
See explanation
Explanation:
3. so the three metals are Cu, Zn, and Fe (i'm assuming based off of the other answers)
A metal (M1) more reactive than the one in solution (M2) will swap places, precipitating M2 out and M1 will dissolve in solution.
So as an example, Zinc is more reactive than Copper, so Zinc metal will displace Copper 2+ in solution, giving Copper metal and Zinc 2+ in solution
The metal ion in solution is Zn2+, which is a pretty reactive metal. We know that a metal has to be more reactive than Zn to turn Zn2+ into Zn. This means that any metal which produces a change when allowed into contact with Zn2+ would have to be very reactive.
The three metal wires are: Cu, Zn, and Fe
Cu is not more reactive than Zn, so no reaction will occur between Cu and Zn2+.
Fe is not more reactive than Zn, so no reaction between Fe and Zn2+
Zn is well... as reactive as Zn, so there will also be no reaction (because there is no incentive for change, no change happens)
Thus, number 3 will have an answer of "No reactions were observed, and no spontaneous chemical equations can be written" (Though zinc does react with water very slowly. Also, if the ZnCl2 was contaminated with acid, the Zinc wire may have formed some bubbles )
For number 4, it is the same logic. But it is also a little more complicated.
The metal in solution is Fe3+. The wires are Zn, Fe, and Cu
The annoying (or cool, depending on how you look at it) thing about Fe3+ is that it can be reduced to either Fe2+(aqueous), or all the way to Fe(solid).
depending on how much reactant is added and what exactly that other reactant is.
From this point on, instead of saying "Because Zn is more reactive than Fe..." I'll say "Because Zn turning into Zn2+ is more favourable than Fe turning into Fe3+" or something of the sort. Hopefully It doesn't become too confusing. Please ask questions in the comments
Zn turning into Zn2+ is much more favorable than Fe turning into Fe3+, so the Zn will react with Fe3+, turning it into Fe and giving Zn2+ (Charges are not balanced)
So Zn(s) + Fe{3+}(aq) -> Zn{2+}(aq) + Fe(s)
and balance it to get
3Zn(s) + 2Fe{3+}(aq) -> 3Zn{2+}(aq) + 2Fe(s)
Fe may seem like it would not react with Fe3+ since they both are iron. However Fe2+ exists, and since Fe2+ turning into Fe3+ is unfavourable (meaning that Fe3+ is a stronger oxidant) and Fe turning into Fe2+ is favourable, the following reaction happens:
Fe(s) + 2 Fe{3+}(aq) -> 3Fe{2+}(aq)
In this reaction, each iron metal atom gives two iron 3+ ions one electron, loosing 2 electrons itself in the process and turning into Fe2+. The two iron 3+ ions given one electron also turn into Fe2+ ions, resulting in 3 Fe2+ ions total
Copper is fairly unreactive, and while FeCl3 is technically reactive enough to react with copper, forming FeCl2 and CuCl, the CuCl layer prevents underneath copper from reacting further.
Related Questions
Explain why the arrangement of molecules affect the compressibility of the different states of matter.
Answers
How does the arrangement of the molecules differ in each state of matter?
Particles in a: gas is well separated with no regular arrangement. liquid are close together with no regular arrangement. solid are tightly packed, usually in a regular pattern.
How will you differentiate the compressibility of the three phases of matter?
Compressibility: It is the property of matter in which its volume is decreased by applying force.
Fluidity: Matter can flow. Filled a gas container: On filling, a gas takes the shape of the container. Shape: Having definite boundaries.Thus, different states of matter are affected by the arrangement of molecules.
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Repeat these steps for a Carbon-14 nucleus. Describe the similarities and differences you see.
Answers
Explanation:
Explanation:
Nucleons can be either protons or neutrons contained in an atom, and since Carbon-14, has a mass number of 14, it is evident that it contains 14 nucleons, as the mass number of an element is the sum of the protons and neutrons of an element
What is the ppm concentration when 7.0 x 10 "-3g" of sodium chloride is dissolved in a solution with a volume of 2
Answers
The ppm concentration of the sodium chloride solution, given that 7.0×10⁻³ g is dissolved with a volume of 2 L is 60 ppm
How do I determine the concentration in ppm?To obatin the concentration in ppm, we'll begin by obtaining the mole of the sodium chloride in the solution. This can be obtained as follow:
Mass of sodium chloride = 7.0×10⁻³ gMolar mass of sodium chloride = 58.5 g/molMole of sodium chloride =?Mole = mass / molar mass
Mole of sodium chloride = 7.0×10⁻³ / 58.5
Mole of sodium chloride = 0.00012 mole
Finally, we shall determine the concentration in ppm. This can be obtained as follow:
Mole of sodium chloride = 0.00012 moleVolume of solution = 2 LConcentration (in ppm) =?Concentration (in ppm) = (mole of solute / volume) × 10⁶
Concentration (in ppm) = (0.00012 / 2) × 10⁶
Concentration (in ppm) = 60 ppm
Thus, we can conclude that the ppm concentration is 60 ppm
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ASAP PLEASEEEEE HELP
Leaving the doors open while the air conditioner is on in a home represents?
A. an loop system
B. an open system
C. an closed system
D. an isolated system
Answers
Option B: an open system
How many moles of Mn are there in a sample of Mn that contains 3.80×1024 atoms?
Answers
There are moles of Mn in a sample of Mn that contains 3.80 × 10²⁴ atom is 6.31 moles.
How to calculate number of moles?The number of moles in a substance can be calculated by dividing the number of atoms of that substance by Avogadro's number, which is equivalent to 6.02 × 10²³ atoms.
No of moles = no of atoms ÷ 6.02 × 10²³
According to this question, there are 3.80 × 10²⁴ atoms in manganese element. The number of moles in this substance is as follows:
no of moles = 3.80 × 10²⁴ ÷ 6.02 × 10²³
no of moles = 6.31 moles
Therefore, 6.31 moles is present in 3.80 × 10²⁴ atoms of manganese.
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A sample of ideal gas is in a sealed container. The pressure of the gas is 735 torr , and the temperature is 6 ∘C . If the temperature changes to 74 ∘C with no change in volume or amount of gas, what is the new pressure, P2 , of the gas inside the container?
Express your answer with the appropriate units.
Answers
The final pressure of the gas is 914 torr. This is obtained by the use of the ideal gas equation and its parameters.
What is the ne pressure?The ideal gases are those kind of gases to which we can be able to apply the ideal conditions. Let us recall that the laws of the ideal gas pertains to the gases that are in the ideal condition. This implies that the gases are at a low pressure and a high temperature.
Now we have that;
Initial pressure P1 = 735 torr
Final pressure of the gas P2 = ??
Initial temperature of the gas T1 = 6 ∘C or 279 K
Final temperature of the gas T2 = 74 ∘C or 347 K
Then by the use of the formula;
P1/T1 = P2/T2
P1T2 = P2T1
P2 = P1T2/T1
P2 = 735 * 347 /279
P2 = 914 torr
The pressure that the gas would have at the end of the process is 914 torr.
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Develop your understanding: Open the Isotopes screen, then explore to develop your own ideas about “isotopes”
1. Which element does the image below represent?
Please harry please
Answers
To see the number of atoms of an element in a given molecule we need to multiply stoichiometry to the number that is written on the foot of the element that is stoichiometry. First image represent oxygen element and second picture represent fluorine element.
What is atom?Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit.
In first image the number of protons are 8 which is of oxygen element. In second image the number of protons are 9 which is of Fluorine element.
Therefore, first image represent oxygen element and second picture represent fluorine element.
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What are the two substances produced through photosynthesis? A. water. B. sugars. C. oxygen. D. carbon dioxide.
Answers
Carbon dioxide + water = Glucose & Oxygen
What is the wavelength of a microwave that has a frequency of 4.2 x 10^8 Hz
Answers
Answer:
0.714 m (app.)
Explanation:
use ∧ = c/f
here, ∧ = wavelength
c = velocity of light = 3 × 10^8 m/s
f = frequency = 4.2 × 10^8 Hz
Which pair of molecules can form a hydrogen bond with one another
Answers
Here's some examples
CH, OH, FH, etc
A beaker weighed 53.10g. To the isolated beaker was added 5.348g of iron pellets and 56.1g of hydrochloride acid. What was the total mass of the beaker and the products after reaction?
Answers
114.5 g is the total mass of the beaker .
Total mass of beaker=53.10g+5.348g+ 56.1g
Total mass=114.5 g
Mass is used in physics to specific inertia, a fundamental function of all remember. basically, it's far a mass of rely's resistance to changing its course or pace in response to the software of a force.
The exchange that an applied force produces is smaller the extra mass a body has. The kilogram, the unit of mass within the international machine of gadgets, corresponds to 6.62607015 1034 joule seconds using Planck's consistent (SI). One joule is produced by way of multiplying one kilogram by means of one rectangular meter per 2d.
The kilogram is decided by genuine measurements of Planck's regular on account that the second one and the meter have formerly been described in phrases of other bodily constants.
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The average kinetic energy of the molecules in a gas sample depends only on the temperature, T. However, given the same kinetic energies, a lighter molecule will move faster than a heavier molecule, as shown in the equation for rms speed
rms speed = square root 3RT/M
where R = 8.314 J/(mol•K) and M is molar mass in kilograms per mole. Note that a joule is the same as a kilogram-meter
squared per second squared (kg•m²/s²).
What is the rms speed of Cl₂ molecules at 411 K?
What is the rms speed of He atoms at 411 K?
Answers
The RMS speed of Cl₂ and He molecules at 411 K is 379.97m/s and 1600 m/s
In a gas, the root-mean-square speed is used to calculate particle speed, which is defined as the square root of the common velocity squared of the molecules in the gas. It is represented mathematically as vrms=3RT/M.
The average kinetic energy of gas molecules is proportional to temperature and inversely proportional to molecular weight.
The root mean square(RMS) speed of the molecule in a gas can be calculated using the following formula
Rms speed = √(3RT/M)
Here R is the gas constant, T is the absolute temperature and M is the molar mass of the gas molecule in kg/mol
Now we have to calculate the RMS speed of Cl₂ molecules at 411 K? and the RMS speed of He atoms at 411 K.
At 411 K, the RMS speed of Cl2 molecules is
RMS speed = √(3RT/M)
=√((3 x 8.314 x 411)/(71 x 10-3 ))
=√(10251.162/0.071)
= √144382.563
= 379.97m/s
RMS speed of He molecules at 411 K
RMS speed = √(3RT/M)
=√((3 x 8.314 x 411)/(4 x 10-3 ))
=√(10251.162/0.004)
= √2562790.5
= 1600 m/s
Therefore the RMS speed of Cl₂ and He molecules at 411 K is 379.97m/s and 1600 m/s
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What is the mass of 1.81 x 1023
molecules of nitrogen, N2? The molar
mass of N2 is 28.02 g/mol.
Answers
The mass of nitrogen, N₂ that contains 1.81×10²³ molecules is 8.42 g
How do I determine the mass of nitrogen, N₂?From Avogadro's hypothesis,
6.02×10²³ molecules = 1 mole of nitrogen, N₂
But
1 mole of nitrogen, N₂ = 28.02 g
Thus,
6.02×10²³ molecules = 28.02 g of nitrogen, N₂
With the above information, we can obtain the mass of nitrogen, N₂ that contains 1.81×10²³ molecules as follow:
6.02×10²³ molecules = 28.02 g of nitrogen, N₂
Therefore,
1.81×10²³ molecules = (1.81×10²³ × 28.02) / 6.02×10²³
1.81×10²³ molecules = 8.42 g of nitrogen, N₂
Thus, we can conclude that the mass of nitrogen, N₂ is 8.42 g
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If 2.5 ggiven off? of KCLO3 were heated in a test tube, how many grams of oxygen gas should be
Answers
Answer:
1.46878825 g O_3
Explanation:
the balanced equation is:
2 KClO_3 = 2 KCl + 3 O_2
using stoichiometry, you can find the amount of O_2 produced from 2.5 g KClO_3
2.5 g KClO_3 x (1 mol / 122.55 g KClO_3) x (3 mol O_3 / 2 mol KClO_3) x (48 g O_3 / 1 mol O_3) = 1.46878825 g O_3
The rock sample on the left is basalt, a type of igneous rock. Heat and intense
pressure changed the basalt into blueschist, a type of metamorphic rock.
Which characteristics of the rock sample changed?
Answers
The rock sample on the left is basalt, a type of igneous rock. Heat and intense pressure changed the basalt into blueschist, a type of metamorphic rock glaucophane schist
Blueschist facies is determined by the particular temprature and pressure condition required to metamorphose basalt to form blueschist and felsic rock and pelitic sediment which are subjected to blueschist facies condition will form different mineral assemblages then metamorphosed and blueschist facies rock are generally formed in subduction zones where oceanic crust is being stuffed into a trench that will become true blueschist once they were pressure cooked and also called glaucophane schist and is a metavolcanic rock that with similar composition at high pressure and low temprature
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Question attached, chemistry :(
Answers
Answer:
jar 1 = barium chloride
jar 2 = potassium bromide
jar 3 = calcium iodide
Explanation:
Electronegativity (EN): A measure of an atom's ability to attract electrons (or electron density) toward itself. On the Pauling scale, fluorine is the most electronegative element (EN = 4.0) and cesium and francium are the least electronegative elements (EN = 0.7).
in a newspaper, the prosecutor said, “Trace evidence is what was really important in this case. Without it, the suspect would not have been found guilty.” Based on this statement, what MOST likely happened in this case?
A.
The murder weapon was found at the suspect’s home.
B.
Multiple witnesses claimed to have seen the suspect commit the crime.
C.
A piece of the suspect’s hair was found on the victim’s body.
D.
There was video footage of the suspect leaving the victim’s home.
Answers
Trace evidence in the above case refers to the piece of the suspect’s hair that was found on the victim’s body.
Trace Evidence Analysis is the field of forensic science that deals with the minute transfers of materials that cannot be seen with the human eye. The handling and analysis of trace evidence requires care and specialized techniques. Trace evidence may provide a link between the victim and a suspect, a victim and a scene, or the suspect and a scene.
Thus with the help of trace trace evidence we can identity the suspect.
It is not uncommon for people to shed hair throughout the day. The ease of transfer of this type of evidence makes it very useful in criminal investigation. Forensic testing of hairs involves identification of human versus animal hair and also the comparison of microscopic features to differentiate between hairs from different individuals. Once comparison is completed, hair with follicular tags can be sent to the Nuclear DNA Unit for analysis.
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Which one is stronger 1.starch or inulin and 2. Cellulose and inulin?helppppp
Answers
Answer:
depends on the type of insulin, but your normal low everyday kind strach is stronger then insulin is stronger than cellulose
Please help I need help like right now!!
There are 0.0449 mole LiCIO4 and 0.135 mol H2O in the sample. Step 3: Divide each by the smallest number of moles to get the ratio.
What is the ratio of LICIO4:H2O? ?] mol LiClO4: [ ? ] mol H2O
Answers
The whole number mole ratio of LiCIO₄ to H₂O in the sample of the compound is 1 : 3.
What is the mole ratio of a reaction?The mole ratio of the reaction is the ratio in which moles of reactants combine to form moles of product.
The mole ratio of the given reaction is calculated below as follows:
Moles of LiCIO₄ present in the sample of the compound = 0.0449 mole LiCIO₄
Moles of H₂O present in the sample of the compound = 0.135 mol H₂O
To get the whole number mole ratio, we divide each mole of substance present in the sample by the smallest number of moles.
Mole ratio of LiCIO₄ = 0.0449 mole / 0.0449 mole
Mole ratio of LiCIO₄ = 1
Mole ratio of H₂O = 0.135 / 0.0449
Mole ratio of H₂O = 3
Hence mole ratio of LiCIO₄ to H₂O in the sample = 1 : 3
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A sample of gas with an initial volume of 29.1 Lat
a pressure of 719 mm Hg and a temperature of
306 K is compressed to a volume of 14.1 L and
warmed to a temperature of 372 K.
Answers
The pressure is 6.215mmHg
Pressure is force per unit area of surface
Here given data is
Initial volume V₁ = 29.1 L
Initial temprature T₁ = 306 K
Initial pressure P₁ = 719 mm Hg
Final volume V₂ = 4.1 L
Final temprature T₂ = 372 K
Final pressure P₂ = ?
We have to find final pressure = ?
So the formula is
P₁V₁/T₁ = P₂V₂/T₂
719 mm Hg×29.1 L/ 306 K = P₂×4.1 L/372 K
68.37 = P₂×0.011
P₂ = 68.37/0.011
P₂ = 6.215mmHg
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A periods number on the periodic table corresponds to the number of:_____.
Answers
Explanation:
highest principal quantum number of the elements in the period
A periods number on the periodic table corresponds to the number of principal quantum number.
What does principal quantum number signify?
The orbit or shell in which an electron is placed in relation to the atom's nucleus is described by its primary quantum number.
The letter n designates this level.Energy levels, subshells, and atomic orbitals can all be used to describe the configuration of electrons surrounding an atom's nucleus.The total number of shells in which electrons are found in an atom is equal to the row, or period, number that an element occupies on the periodic table. The periodic table's period (or row) to which an atom belongs is represented by the greatest energy level number (1–7) for its electrons.Hence, Each period in the periodic table corresponds to a principal energy level.
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A volume of 85.0 mL of H2O is initially at room temperature (22.00 ∘C ). A chilled steel rod at 2.00 ∘C is placed in the water. If the final temperature of the system is 21.20 ∘C , what is the mass of the steel bar?
Answers
The mass of the steel bar is 26.7 g.
the specific heat capacity expression is given as :
Q = m c ΔT
Q steel = Q water
where,
specific heat for water = 0.452 J/ g ° C
specific heat capacity for steel = 4.18 J/ g ° C
Q steel = -Q water
m c ΔT = - m c ΔT
85 × 0.452 × (19.2) = m × 4.18 ×0.8
mass of steel = 26.7 g
Thus, A volume of 85.0 mL of H2O is initially at room temperature (22.00 ∘C ). A chilled steel rod at 2.00 ∘C is placed in the water. If the final temperature of the system is 21.20 ∘C , the mass of the steel bar is 26.7 g.
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Select the correct answer.
How many electrons does a covalent bond consist of?
O A.
OB.
O C.
O D.
one
two
four
eight
Answers
If 6.92 mol of C5H12 reacts with excess O2, how many moles of CO2 will be produced by the following combustion reaction? C5H12+8O2⟶6H2O+5CO2
Answers
If 6.92 mol of C₅H₁₂ reacts with excess O₂, number of moles of CO₂ will be produced by the following combustion reaction is 34.6 mol.
The balanced reaction is given as:
C₅H₁₂ + 8O₂ ---> 5CO₂ + 6 H₂O
Moles of C₅H₁₂ = 6.92 mol
1 mole of C₅H₁₂ produces 5 moles of CO₂
therefore , 6.92 mol of C₅H₁₂ = 5 × 6.92 mol
= 34.6 mol of CO₂
number of moles of CO₂ = 34.6 mol
Thus, If 6.92 mol of C₅H₁₂ reacts with excess O₂, number of moles of CO₂ will be produced by the following combustion reaction is 34.6 mol.
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Choose the statement that best reflects how energy is involved with chemical bonds.
A. Energy is needed to break bonds.
B. Energy is released when bonds are broken.
C. Energy is formed in the breaking of bonds.
D. Energy plays no role in chemical bonds.
Answers
Energy is needed to break bonds, is the best exemplifies the interaction of energy with chemical bonds.
What is chemical bond?
An enduring attraction between ions or atoms known as a chemical bond is what allows molecules and crystals to form. The bond may be created by the sharing of electrons in covalent bonds or by the electrostatic attraction of two oppositely charged ions, as in ionic bonds. Covalent, ionic, and metallic bonds are examples of "strong bonds" or "primary bonds," whereas dipole-dipole interactions, the London dispersion force, and hydrogen bonding are examples of "weak bonds" or "secondary bonds." The sharing or exchange of electrons between the involved atoms results in strong chemical bonds. The negatively charged electrons that surround the nucleus as well as the positively charged protons that make up a nucleus are attracted to one another because opposite electric charges are attracted to one another.
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chemical reaction NaCl (aq) + AgNO3 (aq)
Answers
The given reaction is a double displacement reaction where, Cl and NO₃ group displaces between and sodium and silver atoms. The complete reaction is written as follows:
[tex]\rm NaCl (aq) + AgNO_{3} (aq) \rightarrow AgCl (s) + NaNO_{3} (aq)[/tex].
What is double displacement reactions?There are various kinds of reactions classified based on the way of regrouping of atoms in the reactants. In a double displacement reaction, two species from the reactant side are displaced of each other.
The reaction between sodium chloride and silver nitrate gives sodium nitrate in aqueous form and the precipitate of silver chloride. Here the groups nitrate and chlorine displaces between sodium and silver. Hence it is a double displacement reaction.
The net reaction represents the formation of the silver chloride precipitate.
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Calculate the molecular formula for a compound whose empirical formula is CH2O and molar mass is 150.0 g/mol.
Step 1: Calculate the molar mass for the empirical formula.
What is the molar mass of CH2O?
(C=12.01 amu, H=1.01 amu, O=16.00 amu) [?] g/mol CH₂O
Answers
The molecular formula is (CH2O)5 when the scale factor is 5 and the empirical formula is CH2O.
Considering the question given above, the following data were obtained:
Empirical formula = CH₂O
Molar mass of compound = 150 g/mol
Scaling factor (n) =?
Empirical formula × n = molar mass
[CH₂O]n = 150
[12 + (2×1) + 16]n = 150
[12 + 2 + 16]n = 150
30n = 150
Divide both sides by 30
n = 5
Therefore, the scaling factor is 5
A scale factor is a ratio between corresponding measurements of an object and a representation of that object.In chemistry, the empirical formula of a chemical compound is the simplest whole-number ratio of atoms present in a compound. .Learn more about empirical formula at:
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A 22.46 gram sample of cobalt is heated in the presence of excess bromine. A metal bromide is formed with a mass of 113.8 g. Determine the empirical formula of the metal bromide.
Enter the elements in the order Co, Br
empirical formula =
Answers
The empirical formula of the metal bromide, given that 22.46 grams sample of cobalt is heated in the presence of excess bromine is CoBr₃
How do I determine the empirical formula of the metal bromide?We'll begin by obtaining the mass of bromine in the compound. This can be obtained as follow:
Mass of cobalt = 22.46 gramsMass of metal bromide = 113.8 gramsMass of bromine =?Mass of bromine = (Mass of metal bromide) - (Mass of cobalt)
Mass of bromine = 113.8 - 22.46
Mass of bromine = 91.34 grams
Finally, we shall determine the empirical formula of the metal bromide. Details below:
Mass of cobalt (Co) = 22.46 gramsMass of bromine (Br) = 91.34 gramsEmpirical formula =?Divide by their molar mass
Co = 22.46 / 58.9 = 0.381
Br = 91.34 / 79.9 = 1.143
Divide by the smallest
Co = 0.381 / 0.381 = 1
Br = 1.143 / 0.381 = 3
Thus, we can conclude that the empirical formula of the metal bromide is CoBr₃
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Tricarbon Octasulfide: How many carbons?
* Tricarbon Octasulfide: How many carbons
Answers
The Tricarbon Octasulfide: number of carbons is 3.
The tricarbon octasulfide is C₃S₈. The tricabon octasulfide contains three carbons in the molecular formula. carbon is the element with the chemical symbol C is place in the group 14 and the period second in the periodic table. the atomic number of carbon is six. tri carbon is an inorganic compound with the chemical formula C₃ having three carbon atoms. carbon is used as the fuel in the form of coal , methane . carbon is a non metal and the state of carbon is solid state at room temperature.
Thus, The Tricarbon Octasulfide: number of carbons is 3.
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SC.8.P
2. Construct Arguments Suppose you are a
construction worker. You use aluminum for a
window frame, copper for wiring, and iron for
nails. Use the properties of these materials to
justify their specific uses.
Answers
The aluminum use for a window frame , copper for wiring and iron for nail because of they are malleable , ductile, good conductor of electricity and high energy efficiency.
The aluminum is used for window because aluminum is malleable and the aluminum have high energy efficiency. The copper is used as for the wiring because the copper is the good conductor of the electricity. The iron is use for the nail because iron is hard and have the tendency to resist the corrosion.
Thus, The aluminum use for a window frame , copper for wiring and iron for nail because of they are malleable , ductile , good conductor of electricity and high energy efficiency.
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