Answer:
carbon reduction we can extract a base metal from its ore via reduction of fused metal oxide using carbon whereas, in thermite process, we use aluminium powder instead of carbon.
In carbon reduction, we use carbon for the extraction of metal and obtain free metal. In the thermite process, we use aluminum powder, and metal is obtained in an oxide compound.
What is carbon reduction?In the carbon reduction process, metal ore is heated with carbon while carbon acts as a reduction agent. It reduces metal oxides by removing oxygen in order to form metal elements such as Zn, iron lead, etc. We obtain oxygen, and carbon itself gets oxidized and gives carbon dioxide or carbon monoxide.
\(\[{\text{Metal oxide + Carbon}} \to {\text{Metal + CO/C}}{{\text{O}}_2}\]\)
But this works only for less reactive metals i.e. elements in the reactivity sequence placed Aluminium such as iron, zinc, lead, copper, etc. Since carbon will not get reduced to more active metals such as sodium, it is utilized for processes of extraction as electrolysis.
The carbon reduction process can be used to remove metals from their oxide ores. The thermite process is the process of reduction of any metal oxide using aluminum powder as the reducing agent.
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Describes the chemical reaction (s) that produce AMD. Equations
are balanced and formatted to show subscripts.
Pls help I’m so confused
What is the binding energy of a mole of nuclei with a mass defect of 0.00084 kg/mol?
Answer:
The binding energy of a mole of the nuclei is 252KJ
Explanation:
The binding energy is the amount of energy required to separate an atom into its nuclei.
From Einstein's relations,
E = Δm\(c^{2}\)
where E is the energy, Δm is the mass defect and c is the speed.
The mole of nuclei moves with the speed of light, so that;
c = 3.0 × \(10^{8}\) m/s
Given that Δm = 0.00084Kg/mol, the binding energy is calculated as;
E = 0.00084 × 3.0 × \(10^{8}\)
= 252000
= 252KJ
The binding energy of a mole of the nuclei is 252KJ.
Answer:
7.55×10^10 KJmol-1
Explanation:
The actual mass of a nucleus is usually less than the sum of the masses of the constituent neutrons and protons that make up the nucleus. This difference is called the mass defect.
The mass defect is related to the binding energy holding the neutrons and protons together in the nucleus. Since energy and mass are related by Einstein's equation;
E=∆mc^2 where;
E = binding energy of the nucleus
∆m= mass defect of the nucleus
c= speed of light
The larger the mass defect, the larger the binding energy of the nucleus and the more stable the nucleus.
From the data provided;
Mass defect= 0.00084 kg/mol or 0.84g/mol
Since 1 g/mol= 1 amu
0.84g/mol= 0.84 amu
The conversion factor from atomic mass units to MeV is 931
Binding energy = 0.84 × 931= 782.04 MeV
Since 1eV= 96.49KJmol-1
782.04×10^6eV= 7.55×10^10 KJmol-1
How many moles are in 1.23 x 1024 molecules of oxygen gas.
Answer:
2.04moles
Explanation:
Given parameters:
Number of molecules = 1.23 x 10²⁴molecules
Unknown:
Number of moles of oxygen gas = ?
Solution:
To solve this problem;
6.02 x 10²³ molecules makes up 1 mole of any substance
1.23 x 10²⁴molecules will make up \(\frac{1.23 x 10^{24} }{6.02 x 10^{23} }\) = 2.04moles
6.02 x 10²³ molecules makes up 1 mole of any substance
1.23 x 10²⁴molecules will make up = 2.04moles
Calcium chloride is applied to highways in winter to melt accumulated ice. A snow-plow truck applies 207 lbs of calcium chloride per mile of highway. How many formula units of the compound are applied per mile? Enter in scientific notation.
In scientific notation, there are 94090.90 g of formula units of the compound are applied per mile.
What is scientific notation?Scientific notation is defined as a way of expressing numbers which are too large or too small so that they can be easily written in decimal form. It can be referred to the scientific form or the scientific index form or even the standard form.
Base ten notation is used by scientists, engineers as it helps in simplification of arithmetic operations.
As 1 g=0.0022 lbs, 207 lbs =207×1/0.0022=94,090.90 g.
Thus, there are 94090.90 g of formula units of the compound are applied per mile.
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Which of the following chemical substances has a triple
covalent bond?
A. carbon dioxide (CO2)
B. oxygen (0)
C. carbon monoxide (CO)
D. water (H,0)
Answer:
C. Carbon monoxide
Explanation:
Chemical substance which has a triple covalent bond is carbon monoxide.
What is a covalent bond?Covalent bond is defined as a type of bond which is formed by the mutual sharing of electrons to form electron pairs between the two atoms.These electron pairs are called as bonding pairs or shared pair of electrons.
Due to the sharing of valence electrons , the atoms are able to achieve a stable electronic configuration . Covalent bonding involves many types of interactions like σ bonding,π bonding ,metal-to-metal bonding ,etc.
Sigma bonds are the strongest covalent bonds while the pi bonds are weaker covalent bonds .Covalent bonds are affected by electronegativities of the atoms present in the molecules.Compounds having covalent bonds have lower melting points as compared to those with ionic bonds.
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4- The standard potential of cell: Sn/Sn²+||Cr³+/Cr is −0.60V.what is the standard
reduction potential of the Cr³+/Crelectrode? Es = -0.14V
Sn²+
(b) +0.74V
(c) -0.88V
(d) -0.74V
(a) +0.88V
The standard reduction potential of the Cr³+/Cr electrode is -0.46V. None of the option is correct.
To determine the standard reduction potential of the Cr³+/Cr electrode, we can use the Nernst equation, which relates the standard reduction potential to the cell potential under non-standard conditions. The Nernst equation is given by:
E = E° - (0.0592/n) * log(Q)
where E is the cell potential, E° is the standard reduction potential, n is the number of electrons transferred in the half-reaction, and Q is the reaction quotient.
In this case, we have the standard potential of the cell as −0.60V. We know that the standard reduction potential of the Sn/Sn²+ electrode is -0.14V. Therefore, the reduction potential of the Cr³+/Cr electrode can be calculated as:
E = -0.60V - (-0.14V)
E = -0.60V + 0.14V
E = -0.46V
Therefore, the standard reduction potential of the Cr³+/Cr electrode is -0.46V.
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You discover some bones that have roughly %s as much carbon-14 in them as
they initially possessed. How long ago did the animal live?
Answer:
150 years i guess so? im nkt sure
Answer:
If a fossil bone is found to contain 1/8th as much Carbon-14 as the bone of a living animal, what is the approximate age of the fossil?(half-life of C-14 = 5800 years)
Explanation:
The normal freezing point of water (H2O) is 0.00 oC and its Kf value is 1.86 oC/m. A nonvolatile, nonelectrolyte that dissolves in water is antifreeze (ethylene glycol). How many grams of antifreeze, CH2OHCH2OH (62.10 g/mol), must be dissolved in 280.0 grams of water to reduce the freezing point by 0.400 oC
Answer:
3.74g of ethylene glycol must be added to decrease the freezing point by 0.400°C
Explanation:
One colligative property is the freezing point depression due the addition of a solute. The equation is:
ΔT=Kf*m*i
Where ΔT is change in temperature = 0.400°C
Kf is freezing point constant of the solvent = 1.86°C/m
m is molality of the solution (Moles of solute / kg of solvent)
And i is Van't Hoff constant (1 for a nonelectrolyte)
Replacing:
0.400°C =1.86°C/m*m*1
0.400°C / 1.86°C/m*1 = 0.215m
As mass of solvent is 280.0g = 0.2800kg, the moles of the solute are:
0.2800kg * (0.215moles / 1kg) = 0.0602 moles of solute must be added.
The mass of ethylene glycol must be added is:
0.0602 moles * (62.10g / mol) =
3.74g of ethylene glycol must be added to decrease the freezing point by 0.400°C
Look at the reaction below. Upper H subscript 2 upper S upper O subscript 4 (a q) plus upper Upper M g (s) right arrow Uper M g upper S upper O subscript 4 (a q) plus upper H subscript 2 (g). Which substance is the acid in the reaction? Mg(s) H2(g) MgSO4(aq) H2SO4(aq)
Answer:
H2SO4(aq)
Explanation:
The balanced equation for the reaction is given below:
H2SO4(aq) + Mg(s) —> MgSO4(aq) + H2 (g)
An acid is a substance which dissolves in water to produce hydrogen ion, H+ as the only positive ion.
To know which of the substance is acid, let us dissolve them in water to see which will produce hydrogen ion, H+ as the only positive ion.
This is illustrated below:
H2SO4(aq) —> 2H+(aq) + SO4^2-(aq)
Mg(s) + 2H2O(l) —> Mg(OH)2(aq) + H2(g)
MgSO4(aq) —> Mg^2+(aq) + SO4^2-(aq)
H2 is insoluble in water.
From the above, only H2SO4 produces hydrogen ion H+ on dissolution in water. Therefore, H2SO4 is an acid
Answer:
D on edg 2021
Explanation:
Please help 40 points can be made.
List the important characteristics of organisms that are true of a single-celled organism.
Answer:
The characteristics of unicellular organisms are as follows:
The unicellular organisms usually reproduce by asexual means.
They can be eukaryotes or prokaryotes.
They are found in almost all habitats, from hot springs to frozen tundra.
They possess whip-like structures for movement.
The nutrients enter or leave the cell by the process of diffusion.
Explanation:
Answer:
involved in recycling
Makes oxygen we breathe
Explanation:
Discuss the large-scale environmental impacts of soil pollution caused by industrial wastes.
Answer: Industrial processes including mining and manufacturing historically have been leading causes of soil pollution. Industrial areas typically have much higher levels of trace elements and organic contaminants. This is due to intentional and unintentional releases from industrial processes directly into the environment, including to the soil, adjacent water bodies, and the atmosphere.
Explanation:
when electric current is applied externally, which of the following produces a redox reaction: A wood. B. electrolytic C. Solid
Answer:
the answer is a
Explanation:
it is difficult to cut the steam of water
It is difficult to cut the steam of water because of the unique properties of water and steam.Water and steam are two different states of matter, but they have a common property - they are both molecules of H2O. Steam is formed when water is heated, and the molecules of H2O begin to move faster and further apart from one another.
This results in steam, which is a gas and not a liquid like water. It is more challenging to cut the steam of water than the liquid water due to its unique properties.Therefore, the difficulty of cutting steam of water is due to the following properties of steam:Low density: Steam has low density because of the increased space between the water molecules due to heating. This means that steam takes up more space and is lighter than water, making it difficult to cut or separate from the atmosphere.Gaseous state: Steam is a gaseous state, which means it does not have a definite shape or volume like liquid water. Therefore, cutting steam would be difficult as it does not have a defined structure. Moreover, steam would disperse instantly if it is cut due to its gaseous form and become difficult to capture.Very hot: Steam is at a temperature that is harmful to human skin, and can cause severe burns. This means that cutting steam is also a safety concern, which makes the process even more challenging.For such more question on molecules
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Which structure is the Lewis structure for ammonia (NH3)?
A.
A bond line structure of a compound has N H H H. The nitrogen has two dots at its bottom represents a lone pair of electrons.
B.
A bond line structure of a compound has H N H in the linear plane and hydrogen is branching upward, and the compound is H N (H) H.
C.
A bond line structure of a compound has H N H in linear plane and a hydrogen is branching upward, and the compound is H N (H) H. The nitrogen has two dots at its bottom represents a lone pair of electrons.
D.
A bond line structure of a compound has H N H H. The nitrogen has two dots on its top represents a lone pair of electrons.
Answer: **
H-N-H
|
H
Explanation:
Look at a periodic table to determine how many electrons you need to account for. Hydrogen (H) only has 1 electron, while Nitrogen (N) has 5. We have three Hydrogen atoms and one Nitrogen atom, so the total number of electrons will be 3 * 1 + 5 = 8 e-.
Now, place the center atom, which will be Nitrogen and place the three Hydrogens on three sides of it as above in the answer. You should use single bonds for this. Each single bond is a pair of electrons, so since we have three single bonds so far, we have accounted for 2 * 3 = 6 electrons. However, we need 2 more electrons for the total of 8. We put these electrons in as a lone pair above Nitrogen.
We check to see if everything follows the octet rule: Nitrogen has three single bonds, so that's 6 e-, as well as one lone pair, so that's another 2 e- for a total of 8 e-. Check. Now look at Hydrogen: H is the only element whose full orbital is 2 e-. Each H has a single bond with Nitrogen, so each does have 2 e-.
Thus, we know this is the correct diagram, and we are done.
Explanation:
A bond line structure of a compound has H N H in linear plane and a hydrogen is branching upward, and the compound is H N (H) H. The nitrogen has two dots at its bottom represents a lone pair of electrons. So ,the correct answer is option C.
The correct Lewis structure for ammonia (\(NH_3\)) is option C. It shows a bond line structure with three hydrogen atoms (H) bonded to a central nitrogen atom (N) in a linear plane.
One hydrogen atom branches upward from the plane. Additionally, the nitrogen atom in this structure has two dots at its bottom, indicating a lone pair of electrons. This arrangement follows the octet rule, as nitrogen has formed three covalent bonds with hydrogen, completing its valence shell. The lone pair on nitrogen gives ammonia its characteristic properties.
Thus, option C accurately represents the Lewis structure of ammonia, showing the bonding and lone pair arrangement of its atoms.
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Given that π = n M R T, rearrange the equation to solve for V
Answer:
V= n/M
Explanation:
From;
π = nRT/V = MRT
Where;
n= number of moles
R= gas constant
T= absolute temperature
M= molar mass
V= volume of the solution
π= osmotic pressure
Thus;
nRT/V = MRT
nRT = VMRT
V= nRT/MRT
V= n/M
How can a chemical reaction speed up? Pack in more of the reactant to increase the
A. catalyst B. concentration
C. surface area
D. temperature
Answer:
A. catalyst.
Explanation:
Catalyst is something that causes things to decay. I think catalyst is the right answer from what i know from Miraculous Ladybug... Did you know the show was originally going to be an anime?
H3PO4 + Ca(OH)2 ----> H2O + Ca3(PO4)2 If 10.3g of Ca(OH)2 reacts , How much water is made
Taking into account the reaction stoichiometry, if 10.3 g of Ca(OH)₂ reacts, 5.01 grams of H₂O are formed.
Reaction stoichiometryThe balanced reaction is:
2 H₃PO₄ + 3 Ca(OH)₂ → 6 H₂O + Ca₃(PO₄)₂
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
H₃PO₄: 2 molesCa(OH)₂: 3 molesH₂O: 6 molesCa₃(PO₄)₂: 1 moleThe molar mass of the compounds is:
H₃PO₄: 98 g/moleCa(OH)₂: 74 g/moleH₂O: 18 g/moleCa₃(PO₄)₂: 310 g/moleBy reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
H₃PO₄: 2 moles ×98 g/mole= 196 gramsCa(OH)₂: 3 moles ×74 g/mole= 222 gramsH₂O: 6 moles ×18 g/mole= 108 gramsCa₃(PO₄)₂: 1 mole ×310 g/mole= 310 gramsMass of water formedThe following rule of three can be applied: if by reaction stoichiometry 222 grams of Ca(OH)₂ form 108 grams of H₂O, 10.3 grams of Ca(OH)₂ form how much mass of H₂O?
mass of H₂O= (10.3 grams of Ca(OH)₂ ×108 grams of H₂O)÷ 222 grams of Ca(OH)₂
mass of H₂O= 5.01 grams
Finally, 5.01 grams of H₂O are formed.
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Why were the results of the meta-analysis of 12 randomized controlled trials more significant than the results from the observational studies
of the Britons and Seventh-Day Adventists in North America?
Answer: Why were the results of the meta-study of 12 randomized reserved troubles more meaningful than the results from the practical studies of the Britons and Seventh-Day Adventists in North America? The meta-study is more meaningful cause matters were carelessly picked and pressure misfortune was calculated.
reaction will be spontaneous at all temperatures if _____
If a reaction has a negative ΔG and a positive ΔS, the reaction will be spontaneous at all temperatures.
If a reaction is spontaneous at all temperatures, it implies that the reaction will occur without the need for any external intervention, such as the addition of energy. For a reaction to be spontaneous, it must satisfy the criteria of thermodynamic favorability, which is determined by the change in Gibbs free energy (ΔG) associated with the reaction.
The relationship between ΔG, temperature (T), and the equilibrium constant (K) of a reaction is described by the equation ΔG = ΔH - TΔS, where ΔH is the change in enthalpy and ΔS is the change in entropy.
To ensure spontaneity at all temperatures, two conditions must be met:
ΔG must be negative: A negative ΔG indicates a thermodynamically favorable reaction, meaning the products have a lower Gibbs free energy than the reactants. If ΔG is negative, the reaction will proceed spontaneously in the forward direction.
ΔS must be positive: A positive ΔS signifies an increase in the overall entropy of the system. Higher entropy means more disorder, and spontaneous reactions often involve an increase in randomness. When ΔS is positive, it can compensate for the enthalpic term, ΔH, allowing the reaction to proceed spontaneously.
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A compound is found to contain 9.227 % boron and 90.77 % chlorine by mass. What is the empirical formula for this compound?
Answer:
Empirical formula of a compound means that it provides simplest ratio of whole number.
Explanation:
Mass of boron and chlorine is 9.224% and 90.74%
Which of the following has a fixed volume and shape?
milk feather carbon dioxide oxygen
Answer:
the feather
Explanation:
solids do not change shape
How many liters of wine can be held in a wine barrel whose capacity is 22.0 gal?
Question 2 options:
0.172 L
5.81 L
5810 L
83.3 L
0.000172 L
Answer:
83.3 L
Explanation:
Step 1: Given data
Capacity of the wine barrel (V): 22.0 gal
Step 2: Calculate how many liters of wine can be held in the barrel
To calculate the number of liters of wine that can be held in the barrel, we need to convert 22.0 gal to liters. We will use the conversion factor 1 gal = 3.79 L.
22.0 gal × 3.79 L/1 gal = 83.3 L
Reduction occurs at the cathode in
1.
electrolytic cells, onlysing
2.
voltaic cells, only
3.
both electrolytic cells and voltaic cells
4.
neither electrolytic cells nor voltaic cells
Answer: 3
Explanation:
3) both electrolytic cells and voltaic cells
The statement, that describes reduction occurs at the cathode is "both electrolytic cells and voltaic cells."
What is a reduction?The gain of electrons is referred to as reduction. The species that is being oxidised is also known as the reducing agent or reductant, whereas the species that is being reduced is known as the oxidising agent or oxidant.
Reduction takes place at the cathode electrode whereas oxidation occurs at the anode in both galvanic and electrolytic cells, and electrons travel from the anode to the cathode.
Electrons must move toward the location of reduction since reduction is the addition of electrons. The negative charge is on the cathode of an electrolytic cell, while the positive charge is on the anode.
Hence, the correct answer is 3.
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What keeps galaxies togther? How?
which element has the electrons configuration 1s22s22p63s23p64s23d104p2
Steel is an alloy of iron and carbon. The addition of carbon to iron enhances which of the following properties of iron metal?
O A hardness
O B. malleability
O C. ductility
O D. softness
Answer:
The answer should be A. Adding carbon to iron makes it tougher and stronger.
The addition of carbon atom to iron metal, enhances the property of hardness of metal.
What is alloy?Alloy is a compound which is formed by the mixture of two or more than two metals with different properties to make a new compound with better properties.
When we add carbon atom in the iron metal, it deviates the crystal lattice property of iron and makes it more harder. So, the content of carbon in the iron is directly proportional to the hardness of iron metal.
Hence, option (A) is correct i.e. hardness.
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Write the equation for the neutralization reaction in which barium chloride is the salt formed. Show the reaction in which the fully protonated acid reacts with the base to form the salt indicated. Use the smallest integer coefficients possible. (Use the lowest possible coefficients. Omit states of matter.)
Answer:
2 HCl + Ba(OH)₂ ⇒ BaCl₂ + 2 H₂O
Explanation:
In a complete neutralization reaction, an acid reacts with a base to form neutral salt and water. To form barium chloride, hydrochloric acid (acid) reacts with barium hydroxide (base). The balanced chemical equation is:
2 HCl + Ba(OH)₂ ⇒ BaCl₂ + 2 H₂O
What energy transformations occur in a hot air balloon?
Answer:
: kinetic energy is the energy transformation that occurs in a hot balloon.
Explanation:
Hot air balloons use a propane burner that converts chemical energy to thermal energy. The hot air is less dense than than the colder air and it lifts the balloon
3. A mercury lamp emits radiation with a wavelength of 4.36 x 10-7 m. Calculate the frequency of this radiation
Answer:
The frequency would be 6.88*10^14Hz
\(v=\frac{c}{lambda} = \frac{3.00*10^8 m/s}{4.36*10^-7m}\)
We can solve the equation above to get the answer
The frequency of this radiation should be \(6.88\times 10^{14}\ Hz.\)
Calculation of the frequencySince A mercury lamp emits radiation with a wavelength of \(4.36 \times 10^{-7}\)m
So here the frequency should be
\(= c \div \lambda\\\\= 3.00 \times 10^{8} \div 4.36 \times 10^{-7} m.\\\\= 6.88\times 10^{14}\ Hz.\)
Hence, we can conclude that The frequency of this radiation should be \(6.88\times 10^{14}\ Hz.\)
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An element has 2 stable isotopes. One has 13 amu and 1.07% abundant . The second has 12 amu and 98.93% abundant. What is the average atomic mass of the element
The average atomic mass of the element is 12.0107 amu.
To calculate the average atomic mass of the element in question, we can use the following formula:
average atomic mass = (mass of isotope 1 x abundance of isotope 1) + (mass of isotope 2 x abundance of isotope 2)
where "mass of isotope 1" is the mass of the first stable isotope (13 amu in this case), "abundance of isotope 1" is the percentage of that isotope in the element (1.07% in this case), "mass of isotope 2" is the mass of the second stable isotope (12 amu in this case), and "abundance of isotope 2" is the percentage of that isotope in the element (98.93% in this case).
Substituting the given values in the formula, we get:
average atomic mass = (13 amu x 1.07%) + (12 amu x 98.93%)
average atomic mass = (0.1391 amu) + (11.8716 amu)
average atomic mass = 12.0107 amu
Therefore, the average atomic mass of the element is 12.0107 amu.
This means that on average, one atom of this element weighs 12.0107 atomic mass units (amu), which is slightly heavier than the most abundant isotope (12 amu) due to the presence of the less abundant isotope (13 amu). This concept is important in chemistry because the mass of atoms plays a crucial role in determining their chemical and physical properties. The knowledge of the average atomic mass of an element is important in a wide range of applications, including analytical chemistry, geochemistry, and nuclear physics.
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