The reaction between Mgo and carbonic acid produces magnesium carbonate and water. The abbreviated ionic equation is written as follows:
[tex]\rm Mg ^{2 +} (s)+ CO_{3} ^{2-} (aq) \rightarrow MgCO_{3} (s)[/tex].
What is magnesium carbonate?Magnesium carbonate is an ionic compound formed by the ionic bonding between Mg metal and carbonate group. The reaction of Mg with carbonic acid results in the formation of magnesium carbonate as written below:
[tex]\rm MgO + H_{2}CO_{3} \rightarrow MgCO_{3} + H_{2}O[/tex]
This reaction is an example of double displacement reaction. Here, the oxygen and carbonate groups interchange between Mg metal and hydrogen.
Here, Mg is in solid state an it forms the solid precipitate of magnesium carbonate as written in the ionic equation.
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if 0.300 mol of ch4 burns and all the heat given off by the burning methane is put into 4.00 kg of water, initially at 20.0 o c, what is the final temperature of the water?
The final temperature of the water is 36°C.
What is temperature ?
Temperature is an indicator of the system's atoms' or molecules' typical kinetic energy. According to the zeroth law of thermodynamics, when two things are in thermal equilibrium, there is no heat transfer between them and they therefore have the same temperature.
What is burning ?
Burning, also known as combustion, is a high-temperature exothermic redox chemical process that occurs when an oxidant, typically atmospheric oxygen, reacts with a fuel (the reductant) to generate oxidized, frequently gaseous products in a mixture known as smoke.
CH₄+2O₂⇒CO₂+2H₂O
Amount of heat produced on burning of one mol of CH₄ is 890 KJ
on burning of 0.300 mol of CH₄ amount of heat produced = (0.300*890)KJ
267KJ
267*10⁻³KJ[∴1KJ= 10⁻³J]
let the final temperature of the water be t₁
amount of heat absorbed by water msΔt
4*10³g*4.18Jg⁻¹°C⁻¹*(t-20)°c
4*10³g*4.18Jg⁻¹°C⁻¹*(t-20)°c = 267*10³J
(t-20)= 267*10³/4*10³g*4.18
t-20= 15.96
t=20+15.96
t= 35.96
t= 36°c
Therefore, the final temperature of the water is 36°C.
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In this reaction, how does the rate of forward reaction vary with the concentration of the product?
2H2S(g) ⇌ 2H2(g) + S2(g)
The rate of the forward reaction increase with a decrease in the concentration of the product.
What is Le chatelier's principle?According to Le chatelier's principle, by increasing the rate of chemical reaction then the equilibrium of the reaction will shift towards the low concentration side. On decreasing the rate of reaction then the equilibrium of the reaction shifts towards the high-concentration side.
The effect on the rate of forward chemical reaction to the concentration of the product.
The rate of forward reaction will increase when the concentration of the product decreases. The rate of forward reaction will decrease when the concentration of the product will be increased.
The rate of the forward reaction is also affected by the concentration of the reactant. The rate of forward reaction will increase when the concentration of reactant will increase. The rate of forward reaction will decrease when the concentration of the reactant will decrease.
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12.7 l of argon at 33°c and 735 torr are dissolved in enough water to give a final volume of 0.750 l. what is the molarity of the resulting solution
a. 6.02 M
b. 0.652 M
c. 0.0644 M
d. 0.489 M
e. 4.95 M
Option (b) is correct. The molarity of the resulting solution is 0.652 M. This is calculated using the expression of ideal gas equation and molarity.
12.7 l of argon at 33°c and 735 torr are dissolved in enough water to give a final volume of 0.750l. so,
P = 735.0 torr
= (735.0/760) atm.
= 0.9671 atm.
V = 12.7 L
T = 33.0 o C
= (33.0+273) K
= 306 K
We can find the number of moles using ideal gas equation. The ideal gas law, also called the general gas equation, is the equation of state of a hypothetical ideal gas. It is a good approximation of the behavior of many gases under many conditions. The ideal gas equation is,
P * V = n*R*T
0.9671 atm. * 12.7 L = n * 0.08206 atm. L/mole . K * 306 K
n = 0.4891 mole
Now, we will calculate Molarity. Molarity or molar concentration is the number of moles of solute per liter of solution, which can be calculated using the following equation,
Molarity = number of mole / final volume
= 0.4891 mole / 0.750 L
= 0.652 M
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for a new element, 61.74% is an isotope with mass 281.5 amu, 2.52% is an isotope with mass 283.5 amu, and 35.74% is an isotope with mass 284.5 amu. calculate the average atomic mass of this new element.
When the definition of atomic mass, isotopes, and average atomic mass of an element are kept in mind, the average mass of the metal is 20. 2. Exactly how does atomic mass mean?
The atomic mass of an element is its average atomic mass given in number of atoms (amu, also known as daltons, D). The atomic mass of a particular element is its arithmetic mean across all of its isotopes.
What does atomic mass look like?
An average atomic value is a number that is the only mass of an isotope of carbon-12. The carbon-12 reference standard is used to represent the mass of any isotope of any element. For illustration, the weight of an atom of information as appropriate is 4.0026 amu.
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how many moles of chlorine are required to react completely with 0.66 moles of sodium using this reaction: na cl2 ---> nacl 23.1 moles 1.32 moles 0.33 moles 0.99 moles
b. There must be 1.32 moles of chlorine to balance the reaction.
This answer can be determined by using the stoichiometric equation, which states that for a balanced equation, the number of moles of each element in the reactants must equal the number of moles of each element in the products.
In this case, the equation is Na + Cl2 --> NaCl, and the given information is that there are 0.66 moles of sodium. In order to determine how many moles of chlorine are required to react completely with the sodium, we must first determine how many moles of sodium chloride will be produced.
Since there is one mole of sodium for every mole of chlorine, we can calculate that 0.66 moles of sodium chloride will be produced. This means that there must be 1.32 moles of chlorine to balance the reaction and produce the desired amount of sodium chloride.
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how does the mass of the products of a nuclear fusion reaction compare to the mass of the original elements?
The mass of the products element of a nuclear fusion reaction is more than the mass of the original elements.
H2+H2= He
Nuclear fusion is the process by which light elements interact to create heavier elements (up to iron). Significant amounts of energy are released when interacting nuclei from low atomic number elements, like hydrogen (atomic number 1) or its isotopes deuterium and tritium, are involved. Thermonuclear weapons, also known as hydrogen bombs, were created in the decade immediately following World War II and were the first to use the vast energy potential of nuclear fusion. See nuclear weapon for a thorough history of this development. Meanwhile, there has been a significant push to harness nuclear fusion for the generation of power due to the potential peaceful applications of the process and the virtually infinite supply of fusion fuel on Earth.
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in the laboratory, a student dilutes 24.8 ml of a 11.0 m hydrochloric acid solution to a total volume of 200.0 ml. what is the concentration of the diluted solution?
There are various approaches to answering this question. The most typical method is to use the formula M1V1=M2V2 . the concentration of the diluted solution is 1.364 M
Make sure M is Molarity and V is Volume in Liters when entering this formula. To solve this issue, you must divide 24.8 mL 1,000 to obtain.0248 L. M1 denotes the given molarity (11.0M), and V1 denotes the given molarity's volume (.0248 L). V2 is the final volume of M2, the final molarity that we are looking for. This makes sense given that we increased the volume of the solution while maintaining the same number of moles in the concentration . Our solution should be less concentrated (have a smaller molarity) is 1.364 M
(11.0M) * (.0248 L) = (X) * (.2000 L)
(11.0M) * (.0248 L) / (.2000 L) = (X)
1.364 M = X
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What is the electrical charge of a proton in coulombs (C)?
The electrical charge of a proton is equal to 1.602 x 10^-19 coulombs (C).
The International System of Units uses this as the reference unit for electric charge (SI). The proton is a subatomic particle with a positive charge that is located in the nucleus of an atom. When compared to the electron, which is a negatively charged particle, its charge is the opposite in sign. Any subatomic particle's charge, whether it be that of a proton or another one, is a fundamental characteristic that cannot be altered.
The magnitude of the charge of the proton, and other subatomic particles, is defined by the electric charge of the electron, which is the elementary charge unit. The magnitude of the charge of the electron is 1.602 x 10^-19 C, and this value is used as the reference for the charge of other particles.
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The picture below shows the snowfall during a snowstorm in New England in 1983.
A. the climate of New England, because it shows the precipitation over a few days
B. the climate of New England, because it shows the precipitation over many decades
C. weather conditions in New England, because it shows the precipitation over a few days
D. weather conditions in New England, because it shows the precipitation over many decades
The picture given shows the weather of New England, because it shows the precipitation over a few days.
What is the difference between weather and climate?
Climate describes how the weather is in a certain location over a long period of time as opposed to weather, which refers to short-term changes in the atmosphere.
The average of the weather is the climate. As an illustration, you can anticipate snow in the Northeast in January or hot and muggy weather in the Southeast in July. Climate is this. Extreme values, such as record-breaking high temperatures or heavy rainfall, are also part of the climatic record.
The map only shows precipitations only for 2 days hence it is depicting the weather conditions.
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What’s the first change that occurs in your cookie dough after you put the pan in the oven?
Answer:
Butter melts.
Explanation:
identify the major product that is expected when nitrobenzene is treated with br2 in the presence of catalytic albr3 and heat.
The major product formed when nitrobenzene is treated with br2 in the presence of AlBr3 and heat is m - Bromo nitrobenzene.
Nitrobenzene reacts with Br2 in the presence of AlBr3 to give m-Bromo nitrobenzene as the major product. The σ-complex formed by the attack of Br+ at the meta position is the least destabilized and the most stable among the three σ-complexes. Hence, the nitro group acts as meta directing group. It deactivates the ring.
This is an electrophilic substitution reaction. It takes place in the presence of a catalyst. The catalyst is aluminum chloride. Electrophilic substitution reactions are chemical reactions in which an electrophile displaces a functional group in a compound.
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the atomic symbols of 5 of the elements are the same as the standard abbreviations of 5 of the states of the united states. what are these symbols and the corresponding state names
The atomic symbols of five of the elements that correspond to the standard abbreviations of five of the states of the United States are:
1. Ne (Nebraska)
2. Ar (Arizona)
3. K (Kansas)
4. In (Indiana)
5. Md (Maryland)
Neon (Ne) is a chemical element with atomic number 10. It is a noble gas that appears as a colorless, odorless, tasteless gas. The abbreviation for the state of Nebraska is NE.
Argon (Ar) is a chemical element with atomic number 18. It is a colorless, odorless, non-flammable gas that is the most common noble gas in Earth's atmosphere. The abbreviation for the state of Arizona is AZ.
Potassium (K) is a chemical element with atomic number 19. It is a silvery-white metal that is very reactive in water. The abbreviation for the state of Kansas is KS.
Indium (In) is a chemical element with atomic number 49. It is a soft, silvery-white metal that is both malleable and ductile. The abbreviation for the state of Indiana IN.
Mendelevium (Md) is a chemical element with atomic number 101. It is a synthetic, radioactive element that occurs as a decay product of certain heavier elements. The abbreviation for the state of Maryland is MD.
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Describe three steps that can be used to identify a material
Answer:
Decide what properties you want to check, test those properties, and compare the results to the materials
Explanation:
Which is the correct statement regarding the relative Rf values of the starting methyl benzoate vs the product, methyl m-nitrobenzoate on a silica gel TLC plate? a. The product has a lower Rf value on a silica gel TLC plate because it is more polar than the starting methyl benzoate. b. The product has a lower Rf value on a silica gel TLC plate because it is less polar than the starting methyl benzoate. c. The product has a higher Rf value on a silica gel TLC plate because it is less polar than the starting methyl benzoate. d. The product has a higher Rf value on a silica gel TLC plate because it is more polar than the starting methyl benzoate.
The correct statement regarding the relative Rf values of the starting methyl benzoate vs the product, methyl m-nitrobenzoate on a silica gel TLC plate is (a) the product has a lower Rf value on silica gel TLC plate because it is more polar than starting material methyl benzoate.
There are many pores in silica gel, each of which can hold water; as is well known, water carries a polar charge. So we may say that the silica gel that serves as our stationary phase is polar. Because "like dissolves like" in chemistry, polar compounds interact with other polar substances. If there is a greater interaction, the Rf value will also be lower. Rf value is the molecular distance on TLC plate. Since the nitro group in this example is polar, it will interact with the water in the silica gel and as a result, will travel less distance, resulting in a lower Rf value than the methyl benzoate, which does not connect with the water in the silica gel because it lacks polar groups and therefore runs more quickly and covers a greater distance, leading to a higher Rf. So option (a) is the right option.
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propanol has a normal boiling point of 97.8°c. at 400 torr, it has a boiling point of 82.0°c. what is the heat of vaporization?
44.5 kJ/mol Propanol has a boiling point of 82.0°C when its typical boiling point is 97.8°C at 400 Torr.
What is the hexane vapour pressure at its typical boiling point?Hexane's typical boiling point is 342 K. Hexane has a 30.1 kJ/mol molar heat of vaporization. 1.23 atm is the atmospheric pressure.
Propanol typically boils at T1 = 97.8°C = 371.0 K. A pressure of P1 = 1 atm = 760 torr is referred to as "normal." Its boiling point at 400 torr (P2) is T2 = 82.0 °C / 355.2 K. Using the two point form of the Clausius-Clapeyron equation, we can determine the heat of vaporization (Hvap), which results in the heat of vaporization being 44.5 kJ/mol.
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draw n-methylpiperidine and n,n-dimethylaniline, and classify each as a 1°, 2°, or 3° amine.
N-methylpiperidine and n,n-dimethylaniline (structures attached), and both are 3° amine.
According to the number of carbon atoms that are directly bonded to the nitrogen atom, amines can be divided into three categories: primary, secondary, and tertiary. A single carbon atom is linked to the nitrogen atom in primary amines. The nitrogen is bound to two carbons in secondary amines, while it is bonded to three carbons in tertiary amines. Secondary amines are found in organic compounds.
The molecule n,n,-dimethylaniline contains a benzene ring, followed by nitrogen that is linked to two CH3 groups. As a result, we can see that the element nitrogen is bonded to three different carbon atoms in each molecule. As a result, it is an amine of the third degree or it is a tertiary amine.
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Arrange the organic compounds from most soluble in water to least soluble in water: Most soluble in water Least = soluble in water...
Alcohol is more soluble in water than ether. And CH4 is non polar. So, CH4 will be almost insoluble water.
CH3OH - most soluble
CH3-O-CH3 - second
CH4 - least soluble.
Solubility is defined as the maximum amount of a substance that will dissolve in a specified amount of solvent at a specified temperature. Solubility is a characteristic property of a particular solute/solvent combination, and different substances have very different solubilities.
Solubility can be expressed in grams of solute in one liter of saturated solution. For example, the solubility in water at 25 oC is 12 g/L. Molar solubility is the number of moles of solute per liter of saturated solution. For example, 0.115 mol/L at 25 oC
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Match each Earth and space science discipline to its description.
geology
environmental science
astronomy
the study of the space around
Earth and within the universe,
including meteoroids and
galaxies that are trillions of
miles away
the study of Earth's rocky surface
to determine when and how
Earth was formed and how
its surface is changing
the study of the complex interactions
taking place between living organisms
and Earth's nonliving systems
Which statement is a TRUE description of inorganic compounds? Inorganic compounds lack long, complex chains of carbon atoms. Polysaccharides are inorganic compounds because these sugars do not taste sweet. Inorganic compounds can be formed from complex sequences of amino acids. Inorganic compounds can produce energy in the form of ATP.
True statement of inorganic compounds are Inorganic compounds lack long, complex chains of carbon atoms.
A material without both carbon and hydrogen is said to be an inorganic compound. Many inorganic substances, like water (H2O) and the hydrochloric acid (HCl) secreted by your stomach, do contain hydrogen atoms. In contrast, carbon atoms are only present in a small number of inorganic molecules. A chemical without a carbon-hydrogen bond is said to be inorganic. A chemical substance that does not contain carbon-hydrogen bonds, or one that is not an organic complex, is known as an inorganic compound. Any substance in which two or more chemical elements (often those other than carbon) are mixed, almost invariably in precise proportions, is referred to as an inorganic compound. When carbon is bonded to hydrogen, a compound is categorized as organic.
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What is the molarity of 4 g of nacl in 3, 800 ml of solution? molar mass nacl = 58. 44 g/mol.
The molarity of the solution is 0.018 M.
For the calculation of molarity, we need to use the formula for molarity, put all values in the formula, and then complete the calculation.
formula of molarity= [tex]\frac{number of moles}{volume(L)}[/tex] M
volume of solution is 3800ml or 3.8L
number of moles= [tex]\frac{Given mass}{Molar Mass}[/tex] = [tex]\frac{4}{58.44}[/tex] = 0.06844
where given mass is the mass of solute that are present in the solution
What is molar mass?Molar mass is also defied as the sum of atomic masses of all atoms present in the molecule.
molarity = [tex]\frac{0.06844}{3.8}[/tex] = 0.018 M
Hence the molarity of solution is 0.018 M
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the inflammatory response involves chemical and physical barriers that help protect the body from harmful substances.
The statement stating the inflammatory response involves chemical and physical barriers that help protect the body from harmful substances is true.
Our body has immune system to protect from unwanted substances and organisms that may harm our body. It involves different types of cells that are broadly categorised into myeloid and lymphoid immune cells. They utilise chemicals to impart protection to body.
Physical barrier is tears, skin, mucus that prevents the entry of harmful organisms into the body. The common symptoms we see on encountering the foreign substances are allergy, cough, fever, pain and other such signs.
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Answer: true
Explanation: edg
it is said that secrets should be few and changeable and they should also maximize entropy. what is entropy?
Entropy, the amount of thermal energy per unit temperature in a system that cannot be used for productive work.
Entropy is the measurement of the amount of thermal energy per unit of temperature in a system that cannot be used for productive work. Entropy is a measure of a system's molecular disorder or randomness because work is produced by ordered molecular motion. Entropy theory offers profound understanding of the direction of spontaneous change for many commonplace phenomena. A standout of 19th-century physics is its invention by the German physicist Rudolf Clausius in 1850. Entropy offers a mathematical way to express the intuitive understanding of which processes are impractical even though they wouldn't go against the fundamental principle of energy conservation.
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NH3+__0->NO+H20
a) What mass ofNO2 can be produced from 8.46 x 102 molecules of oxygen?
b) 23.7 g ofNH3 would be able to produce how many moles of H0?
c) How many grams of O2 are needed to produce 1.26 x 102 molecules of H20?
d) How many moles of NH3 are needed to react completely with 22.05 L of oxygen?
a) The mass produced is 6.5 * 10^ -20 g.
b) The amount of water produced is 2.1 moles.
c) The mass of oxygen produced is 7.84 * 10^ -21 g.
d) The moles of ammonia needed is 0.56 moles.
What is stoichiometry?Let us recall that we can be able to use the principles of stoichiometry to be able to obtain the parameters that we need to solve in this question.
a) Given that;
1 mole of oxygen would contain 6.02 * 10^23 molecules
x moles of oxygen would contain 8.46 x 10^ 2 molecules
x = 1.41 * 10^ -21 moles
If 4 moles of ammonia produces 4 moles of nitrogen IV oxide. Hence the mass of the nitrogen IV oxide produced
= 1.41 * 10^ -21 moles * 46 g/mol
= 6.5 * 10^ -20 g
b) Number of moles of ammonia = 23.7 g/17 g/mol
= 1.39 moles
If 4 moles of ammonia produces 6 moles of water
1.39 moles of ammonia produces 1.39 * 6/4
=2.1 moles
c) 1 mole of water would contain 6.02 * 10^23 molecules
x moles of water would contain 1.26 x 10^ 2 molecules
x = 2.1 * 10^ -22 moles
If 7 moles of oxygen produces 6 moles of water
x moles of oxygen would produce 2.1 * 10^ -22 moles of water
x = 2.45 * 10^-22 moles
Mass of the oxygen = 2.45 * 10^-22 moles * 32 g/mol
= 7.84 * 10^ -21 g
d) If 1 mole of oxygen occupies 22.4 L
x moles of oxygen occupies 22.05 L
x = 0.98 moles
If 4 moles of ammonia reacts with 7 moles of oxygen
x moles of ammonia would reacts with 0.98 moles of oxygen
x = 4 * 0.98/7
= 0.56 moles
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C2H2 + O2 CO2 + H2O what is being reduced and what is being oxidized?
In the chemical reaction C2H2 + O2 CO2 + H2O, the compound C2H2 is being oxidized, while the compound O2 is being reduced. This is because, in an oxidation-reduction reaction, the substance that is being oxidized (in this case, C2H2) is losing electrons, while the substance that is being reduced (in this case, O2) is gaining electrons.
14. B = Black fur, b = white fur, Show a punnett square for this cross: Bb x Bb, Give the genotypes and
phenotypes as probabilities.
Answer: the image below is the answer
Explanation:
indicate whether the following reaction involves c–o or o–h bond cleavage of the alcohol molecule.
The following reaction involves (1) C–O bond cleavage of the alcohol molecule.
When extreme circumstances and an abundance of hydrogen halides are present, the C-O bond in ethers can be broken. Two molecules of alkyl halide are produced as a byproduct of the process involving dialkyl ether. Because of the increased strength of the aryl-oxygen bond, the alkyl-oxygen bond in alkyl aryl ethers is the point of cleavage. The reaction results in the production of phenol and alkyl halide.
As we can see in the given mechanism, after the first step, an intermediate C-O bond is broken by the Br⁻ ion in alcohol, which is an incoming ion via the SN2 mechanism. At this stage, the O-H bond is not broken; only the C-O bond is broken.
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Which is a saturated fatty acid?
Answer:
The saturated fatty acids are derived from both animal fats and plant oils. Rich sources of dietary saturated fatty acids include butter fat, meat fat, and tropical oils (palm oil, coconut oil, and palm kernel oil). Saturated fatty acids are straight-chain organic acids with an even number of carbon atoms (Table 2)
Compare and contrast biological and non biological
methods of metal extraction
Biological and non-biological methods of metal extraction refer to the different ways in which metals can be extracted from ore deposits in the ground. Biological methods, also known as biomining, use microorganisms to extract metals from ores. These microorganisms, such as bacteria and fungi, can break down the chemical bonds in ores and release the metals they contain, which can then be extracted and purified. Non-biological methods, on the other hand, use physical or chemical processes to extract metals from ores. These methods can include roasting, smelting, and leaching, and they do not require the use of living organisms.
One key difference between biological and non-biological methods of metal extraction is the speed at which they can extract metals. Biological methods are generally slower than non-biological methods, but they are also often more environmentally friendly, as they do not produce as much waste or pollution. Non-biological methods, on the other hand, can be faster and more efficient, but they can also be more harmful to the environment.
Another difference between the two types of metal extraction methods is the types of ores that they can be used on. Biological methods are typically more effective on sulfide ores, which are ores that contain sulfur. Non-biological methods, on the other hand, are often more effective on oxide ores, which are ores that contain oxygen.
Overall, biological and non-biological methods of metal extraction are two different approaches to extracting metals from ores. While both methods have their advantages and disadvantages, they are both important tools in the field of mining and metallurgy.
for water to change into the gas phase, energy is required to break hydrogen bonds between h2o molecules. this energy is referred to as:
For water to change into the gas phase, energy is required to break hydrogen bonds between H₂O molecules. this energy is referred to as latent heat.
Latent heat is defined as the energy in the form of heat that is required in order to change a matter from its solid into liquid form or liquid into gas form, but without a change of temperature. An example of a latent heat would be of boiling water at 100 degrees Celsius (212 degrees Fahrenheit), because at this stage, the water from its liquid form will start to change into its gas form, forming a water vapor, while the temperature remains constant at 100 degrees Celsius.
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Explain how magic numbers are related to nuclear stability.
In nuclear stability, there are seven magic numbers which are 2, 8, 20, 28, 50, 82, and 126.
What are magic numbers?A magic number can be described as a number of nucleons such that they are arranged into shells within the atomic nucleus. Atomic nuclei with a 'magic' number of protons or neutrons are much more stable than other simple nuclei.
The seven most recognized magic numbers are 2, 8, 20, 28, 50, 82, and 126. For protons. the elements helium, oxygen, calcium, tin, nickel, lead, and unbihexium, although 126 is known to be a magic number for neutrons.
Atomic nuclei containing such a magic number of nucleons exhibit a higher binding energy per nucleon.
The magic number shows the number of filled nuclear shells. They tend to recognize the isotopes that are much more stable as compared to other elements and show the energies of each nucleon.
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