Answer:
A answer is write answer
Consider the close-packed structures we have been discussing. What would be the coordination number for a single atom inside of a 3-dimensional close packed structure?Note: The coordination number is the number of atoms bonded to a given atom or in the case of close-packed metals the number of atoms "touching" a given atom. (These atoms can be considered "coordinated" to that atom.) This coordination number will be the same for every atom in the structure and will be the same irrespective of the stacking sequence (i.e., the same for HCP and FCC).
The coordination number for a single atom inside of a 3-dimensional close-packed structure is 12.
The coordination number for a single atom inside of a 3-dimensional close-packed structure is 12. This is because in a close-packed structure, each atom is surrounded by 12 other atoms, 6 in the same plane and 3 in the plane above and 3 in the plane below. This is true for both hexagonal close-packed (HCP) and face-centered cubic (FCC) structures, as the coordination number is determined by the number of atoms "touching" a given atom and is the same for every atom in the structure.
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pls help pls pls pls pls pls
A novel mutation is most likely the cause of the appearance of a black mouse within a population of light mice , those are inconsistent and rare events.
Why do some mice have a light color while others have a dark color?Fur color is influenced by several genes (4:29). The majority of genes are similar, but one gene (Mc1r) separates light and dark rock pocket mice. 4:55). The color of a mouse's fur is influenced by the genotype of the MC1R gene, according to Data Set 2. Mice that have two copies of allele 2 have the fur that is the darkest.
The dark-colored mice were the result of a random mutation in the population at site A. The trait did not spread because it did not benefit the mice from selection.
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With reference to the balanced chemical reactions above, demonstrate your work below.
a. If 0.25 mol Na2CO3 completely reacts with excess HCI, how many moles of NaCl and CO2
will be produced, respectively?
b. If 6.02 x 1022 particles of NaBr completely react with excess Ca(OH)2, how many particles
of NaOH will be produced?
c. If 204.45 g of NH3 is completed used up in the reaction, how many grams of (NH4)2SO4
will be produced?
d. If 1 mol CsH₂O reacts with 2 mol O₂, how many mol of CO₂ will be produced?
There will be 0.5 moles of NaCl and 0.25 moles of CO2 produced if the entire 0.25 mol of Na2CO3 interacts with the excess HCl.
How to calculate moles?When extra Ca(OH)2 and 6.02 x 1022 NaBr particles totally react, 6.02 x 1022 NaOH particles are created.The reaction will yield 794.5g of (NH4)2SO4 if 204.45 g of NH3 are fully consumed during the process.Five moles of CO2 will be created if one mole of C5H9O interacts with two moles of oxygen.Given, A 0.25 mol of Na2CO3Na2CO3 + HCl 2NaCl + H2O CO2
1 mol of Na2CO3 splits into 2 moles of NaCl and 1 mole of CO2.
0.25 moles of Na2CO3 and 0.25 moles of CO2 are formed.
NaBr particles, 6.02 x 1022
Ca(OH)2 = CaBr2 + 2NaOH 2NaBr + Ca(OH)2
NaBr, 2 mole creates two moles of NaOH
Hence, 6.02 x 1022 NaBr particles are converted into 6.02 x 1022 NaOH particles.
204.45 g is the mass of NH3.
(NH4)2SO4 = 2NH3 + H2SO4
34 g of NH3 converts to 132.14 g of (NH4)2SO4.
794.45 g of (NH4)2SO4 are created from 204.45 g of NH3.
1. mol C5H9O
20CO2 plus 18H2O from 4C5H9O and 27O2
20 moles of CO2 are produced by 4 moles of the compound C5H9O.
In the synthesis of one mole of C5H9O, five moles of CO2 are produced.
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draw the diagrammatical representation of Boyle's law
Explanation:
As per figure...You can have a look on it..
Boyes's law states that at constant temperature(T) for a given mass of ideal gas, the volume(V) of the gas is inversely proportional to its pressure(P).
That is PV=K where K is a constant
Graphs of Boyle’s law can be plotted at different temperatures.
The graph of Boyle’s law is known as a pressure-volume graph or PV curve.
The pressure and volume graph at constant temperature is known as an isotherm
As the Pressure increases with decreasing in volume, and vice versa.
Other parameters such as temperature and amount of gas are constant in the graph.
The equation of the curve is PV=K, which is the equation of Boyle’s law
CO2 dissolves in water to form an acid called
Answer:
carboxylic acid
Explanation:
i think so
pls mrk me brainliest
A balloon filled with carbon dioxide gas at room temperature is placed in a freezer at 5 °C. Which statement describes the resulting effect on the gas particles?
Answer: they would decrease the speed and collisions of the gas particles
Explanation:
This is because the particles slow down as the temperature decreases and would also effect the volume of the ballon making it deflate a bit as not as much volume is needed anymore.
what has a molar mass of 63?
Note on matter
What is matter
Define 3 states of matter
What is valency
Give an example of a change that the ecosystem was not able to recover from. Can you explain why?
The dodo's extinction was a change that the ecosystem of Mauritius was not able to recover from.
What is an example of a change that ecosystem was not able to recover from?One example of a change that an ecosystem was not able to recover from is the extinction of dodo bird in Mauritius.
The dodo bird was a flightless bird that was native to Mauritius, an island in Indian Ocean. When humans arrived on the island in 16th century, they brought with them non-native animals such as pigs, rats, and monkeys, which preyed on dodo's eggs and competed with bird for food.
The dodo had no natural predators on the island and was not adapted to defend itself against the new threats posed by these introduced species. As a result, dodo population declined rapidly and was completely extinct by the end of 17th century.
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calculate the ph of the final solution when 52.3 ml of hcl is mixed with 15.8 ml of hno3. the ph values of hcl and hno3 solutions are 4.34 and 3.89, respectively.
The final solution has a pH of 1.17.
The pH of the final solution can be calculated by using the equation:
pH = -log[H+]
Where [H+] is the concentration of hydrogen ions in the solution.Hydrogen ions, also known as protons, are positively charged particles that are found in solutions.
To calculate the concentration of hydrogen ions, we need to calculate the molarity of the solution.
Molarity of HCl =[tex]\frac{ (52.3 mL * 0.1000 mol/L) }{ (1000 mL/L) }[/tex]
[tex]= 0.0523 mol/L[/tex]
Molarity of HNO3 = [tex]\frac{(15.8 mL * 0.1000 mol/L) }{(1000 mL/L) }[/tex]
[tex]= 0.0158 mol/L[/tex]
Total molarity of the solution = 0.0523 + 0.0158 = 0.0681 mol/L
[H+] = 0.0681 mol/L
pH = -log[H+]
= -log(0.0681)
pH = 1.17
Therefore,The pH of final solution is 1.17.
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A sample contains 2.1 x 1023 atoms and it has a mass of 13.7 grams. What is the element?
We can see that the closest molar mass to 3.93 g/mol is that of Lithium (Li) which is 6.94 g/mol.
Therefore, the element is Lithium (Li).
How to determine the element?To determine the element, we need to use the molar mass of each element to find the number of moles present in the sample. We can then compare the number of moles to the Avogadro's number to determine the number of atoms.
The molar mass of an element is the mass of one mole of the element in grams. We can calculate the number of moles by dividing the mass of the sample by the molar mass of the element.
Let's assume that the element is X. The molar mass of X can be calculated by dividing the mass of the sample by the number of moles present in the sample:
molar mass of X = 13.7 g / (2.1 x 10²³ atoms / Avogadro's number)
where Avogadro's number is 6.022 x 10^23 atoms/mol.
molar mass of X = 13.7 g / 3.49 mol
molar mass of X = 3.93 g/mol
Now, we can compare the molar mass of X to the molar masses of known elements to determine the element. From the periodic table, we can see that the closest molar mass to 3.93 g/mol is that of Lithium (Li) which is 6.94 g/mol.
Therefore, the element is Lithium (Li).
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Ranking single, double, triple bonds in order of increasing flexibility and increasing strength: PH3, CF4, CO2, SO3, HCN, CO, H2O
Increasing flexibility: CF4 < SO3 < CO2 < PH3 < H2O < HCN < CO
Increasing strength: CF4 < CO2 < SO3 < PH3 < H2O < HCN < CO
Explanation:
CF4 has only single bonds, which makes it the least flexible molecule on the list.SO3 and CO2 both have double bonds, making them more flexible than CF4, but less flexible than PH3, which has a single bond.H2O and HCN have one double bond and one single bond, making them more flexible than SO3 and CO2, but less flexible than PH3.CO has a triple bond, making it the most flexible molecule on the list.In terms of strength, CF4 has only single bonds and is the weakest molecule.CO2 and SO3 both have double bonds, making them stronger than CF4 but weaker than PH3, which has a single bond.H2O and HCN have one double bond and one single bond, making them stronger than CO2 and SO3 but weaker than PH3.CO has a triple bond, making it the strongest molecule on the list.A 23.5 g sample of nacl was placed in a 500.0 ml erlenmeyer flask, which was filled to the mark with water. what is the molar concentration of the resulting nacl solution?
the molar concentration of the resulting NaCl solution is 0.804 mol/L.
The molar concentration of the NaCl solution can be calculated using the equation:
C = n/V,
where C is the molar concentration, n is the amount of substance (in moles), and V is the volume of the solution (in liters).
Given that the sample has a mass of 23.5 g and the molar mass of NaCl is 58.44 g/mol, we can calculate the amount of substance (n) in the sample:
n = 23.5 g / 58.44 g/mol = 0.402 mol
The volume of the solution (V) is equal to the volume of the Erlenmeyer flask, which is 0.500 L:
V = 0.500 L
Therefore, the molar concentration of the NaCl solution can be calculated as follows:
C = 0.402 mol / 0.500 L = 0.804 mol/L
Therefore, the molar concentration of the resulting NaCl solution is 0.804 mol/L.
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Give at least 10 beneficial effects of separate mixture
Separation of mixtures is the process of isolating and purifying individual components from a mixture. It has a wide range of applications in various fields, including chemistry, biology, and environmental science. Here are ten beneficial effects of separation of mixtures:
Helps to obtain pure substances: Separation of mixtures helps in obtaining pure substances, which are essential for research and industrial processes.
Enables identification of individual components: Separation of mixtures allows the identification and characterization of individual components in a mixture.
Allows the removal of impurities: Separation of mixtures can be used to remove impurities from a mixture, which can improve the quality of the final product.
Facilitates recycling: Separation of mixtures is crucial for recycling materials such as plastic, paper, and metals.
Enables selective extraction: Separation of mixtures can be used to selectively extract specific components from a mixture.
Helps in drug development: Separation of mixtures is important in drug development, where pure compounds are required for testing and clinical trials.
Helps in forensic analysis: Separation of mixtures is used in forensic analysis to identify and analyze evidence.
Facilitates food processing: Separation of mixtures is used in the food industry to extract and purify ingredients.
Enables the production of clean energy: Separation of mixtures is used in the production of clean energy, such as separating hydrogen from other gases.
Helps in environmental remediation: Separation of mixtures is used in environmental remediation to separate and remove pollutants from soil, water, and air.
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Anyone who falls into a lake fully clothed could develop hypothermia (very low body
temperature). First aid treatment by paramedics is always to remove wet items of clothing. Use
your knowledge of thermal energy, evaporative cooling, and changes of state to explain
why.
Depending on the severity of the hypothermia, emergency medical care may include one or more of the following measures to increase the body temperature: Rewarming that is done passively. It is sufficient to cover someone suffering from moderate hypothermia with heated blankets .
What is the hypothermia first-aid treatment?Remove damp garments with care. Warm, dry jackets or blankets should be used in lieu of damp items. If more warming is required, it should be done gradually. Apply warm, dry compresses to the center of the body, such as the neck, chest, and groin.
Frostbite, or tissue loss induced by tissue freezing, is one of the most prevalent problems linked with hypothermia. Chilblains are caused by nerve and blood vessel injury. Gangrene is also known as tissue death.
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Varying masses of sodium metal
react with a fixed mass of chlorine. The graph shows the masses of sodium used and sodium chloride produced. Explain the general shape of the graph and identify the limiting and excess reagents. laCl (g)
Chlorine serves as the reaction's limiting reagent, and sodium serves as the reaction's reagent. The point of equivalency, known as endpoint of the reaction, where the mass of sodium and mass of chlorine are equal.
sodium chloride is created when chlorine and sodium combine.The white, crystalline substance sodium chloride, or ordinary table salt, which comprises sodium cations and chloride anions, is created by a powerful reaction between the elements sodium and chlorine.
Balanced chemical equations illustrate the conservation of mass in what way?Because each chemical equation must be balanced and the amount of atoms of each element on the reactant side must match the number of atoms of each other, chemical equations serve as examples of the law of conservation of mass.
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(Use the chemical equation below to solve this problem.) A chemist has 25 grams of molecular chlorine. If all of the molecular chlorine in the reaction is consumed to form the product hydrogen chloride, how many grams of hydrogen chloride are produced?
Therefore, if all of the molecular chlorine in the reaction is consumed to form hydrogen chloride, 25.69 grams of hydrogen chloride are produced.
What is reaction?A reaction is a process in which one or more substances (the reactants) are transformed into one or more different substances (the products). Chemical reactions involve the breaking and forming of chemical bonds, resulting in the rearrangement of atoms and the formation of new compounds. Reactions can be classified as physical or chemical, depending on whether or not a chemical change occurs.
Here,
The balanced chemical equation for the reaction between molecular chlorine (Cl₂) and hydrogen gas (H₂) to form hydrogen chloride (HCl) is:
Cl₂ + H₂ → 2HCl
This equation tells us that one mole of Cl₂ reacts with one mole of H₂ to produce two moles of HCl.
To determine the amount of HCl produced from 25 grams of Cl₂, we need to convert the mass of Cl₂ to moles using its molar mass:
molar mass of Cl₂ = 2 x atomic mass of Cl = 2 x 35.45 g/mol = 70.90 g/mol
moles of Cl₂ = (mass of Cl₂) / (molar mass of Cl₂) = 25 g / 70.90 g/mol = 0.352 mol
Since the mole ratio of Cl₂ to HCl is 1:2, the number of moles of HCl produced is twice the number of moles of Cl2:
moles of HCl = 2 x moles of Cl₂ = 2 x 0.352 mol = 0.704 mol
Finally, we can convert the moles of HCl to grams using its molar mass:
molar mass of HCl = atomic mass of H + atomic mass of Cl = 1.01 g/mol + 35.45 g/mol = 36.46 g/mol
Finally, we can use the molar mass of HCl to convert the number of moles to grams:
0.704 mol HCl x 36.46 g/mol = 25.69 g HCl
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the best reason for why a covalent bond forms is a) two atoms exist as ions and the ions are attracted to each other. b) the atoms that form cations have low ionization energy and anions have high electron affinity, so the two atoms exchange electrons. c) nonmetal atoms cannot react with each other unless they share electrons. d) atoms with high electronegativities will not lose electrons, so instead they share electrons to reach a stable number of valence electrons.
The correct option is D:atoms with high electronegativities will not lose electrons, so instead they share electrons to reach a stable number of valence electrons
What do we mean by covalent bond-
A covalent bond is a chemical bond in which two atoms share electrons in such a way that they both attain a noble-gas configuration.
The sharing of valence electrons between atoms is known as a covalent bond.Some atoms lacks or has an extra electron in its outermost state,gaining or losing an electron from their outermost state can lead to stable configuration of both the species reducing their energy levels.Covalent bond is formed between an electronegative species(reciever) and electropositive species(donor),in which the electron is shared.
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If the elements cobalt and bromine were mixed and heated, they would combine into
a solid ionic compound. The name of the compound is Its formula is
To earn full credit for your answers, you must show the appropriate formula, the correct substitutions , and your answer including the correct units.
In 2013, there were 2.6 x 106people living in Rome. In 2013, 2.41 x 104 people died in Rome. What was the Crude death rate?
The crude death rate in Rome in 2013 was 0.9269, or 0.9269 deaths per 1,000 people.
What is the crude death rate?The crude death rate (CDR) is the number of deaths in a population divided by the total population, multiplied by a constant factor (usually 1,000 or 100,000) to express the rate per unit of population.
The formula for CDR is:
CDR = (Number of deaths / Total population) x Constant factor
We are given the following values:
Number of deaths (D) = 2.41 x 10^4
Total population (P) = 2.6 x 10^6
Constant factor = 1,000
Substituting these values into the formula for CDR, we get:
CDR = (D / P) x Constant factor
CDR = (2.41 x 10^4 / 2.6 x 10^6) x 1000
CDR = 9.269 x 10^-1
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How many moles of CO would be products if 8.40 moles of SO4 was also produced
Answer:
Need the reast of the question. Like the reactants or equation
Explanation:
Honey aroma is a compound isolated from bee honey that can be used to sweeten food for people that have a problem with diabetes. A small 4.10-gram sample was taken from a beehive for analysis. It was found to contain 3.0 grams of carbon, and .30 grams of hydrogen and the rest was oxygen. What is the empirical formula for this sweetener? If it has an actual molar mass of 164 g/mole, then what is its molecular formula?
1. The empirical formula for the sweetener is C₅H₆O
2. The molecular formula for the sweetener is C₁₀H₁₂O₂
1. How do i determine the empirical formulaThe empirical formula for the sweetener can be obtained as follow:
Mass of compound = 4.1 gCarbon (C) = 3 gHydrogen (H) = 0.3Oxygen (O) = 4.1 - (3 + 0.3) = 0.8 gEmpirical formula =?Divide by their molar mass
C = 3 / 12 = 0.25
H = 0.3 / 1 = 0.3
O = 0.8 / 16 = 0.05
Divide by the smallest
C = 0.25 / 0.05 = 5
H = 0.3 / 0.05 = 6
O = 0.05 / 0.05 = 1
Thus, the empirical formula is C₅H₆O
2. How do i determine the molecular formula?The molecular formula for the sweetener can be obtained as follow:
Molar mass of sweetener = 164 g/molEmpirical formula = C₅H₆OMolecular formula =?Molecular formula = empirical × n
Molecular formula = mass number
Thus,
Empirical × n = mass number
[C₅H₆O]n = 164
[(12 × 5) + (1 × 6) + 16]n = 164
[60 + 6 + 16]n = 164
82n = 164
Divide both sides by 82
n = 164 / 82
n = 2
Molecular formula = [C₅H₆O]n
Molecular formula = [C₅H₆O]₂
Molecular formula = C₁₀H₁₂O₂
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Which stimulus is an example of an internal stimulus?
Responses
an artificial light that attracts insects
an artificial light that attracts insects
a sudden change of air temperature
a sudden change of air temperature
a decrease in oxygen levels in the blood during exercise
a decrease in oxygen levels in the blood during exercise
an increase in the amount of water available to a plant
a decrease in oxygen levels in the blood during exercise
an artificial light that attracts insects
stimulus is an example of an internal stimulus
What kinds of internal stimuli and reactions can you think of?Things like oxygen levels, blood sugar and pH levels, water levels, and internal temperature are examples of internal stimuli. If any of these factors becomes too high or too low, the body will react in order to reestablish homeostasis.
There are both internal and exterior stimuli. One illustration of external stimulation is how your body reacts to drugs. Vital sign alterations brought on by internal body changes are an example of internal stimulation.
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How do prevailing winds affect the precipitation an area experiences
Both Groups IA and IIA have high_____ ionization energies and ____ electronegativity, which is why these substances are very reactive.
Both Groups IA and IIA have high ionization energies and high electronegativity, which is why these substances are very reactive.
What is ionization?Ionization is the process by which atoms or molecules gain or lose electrons, resulting in the formation of ions. It is a fundamental process in physics and chemistry, and is the basis of many physical and chemical phenomena. Ionization is essential to the formation of many kinds of molecules, and it occurs when electrons are either added to or removed from neutral atoms or molecules. This process can be done through a variety of methods, including electrical or thermal energy, or radiation. Ionization can also occur through chemical reactions, such as the reaction of a metal with an acid, or the reaction of a gas with a liquid. In each of these cases, the resulting ions may take part in subsequent chemical reactions. Ionization is also responsible for the formation of ions in the atmosphere, and is responsible for many of the properties of matter.
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the rate of a standard reaction is 0.01840 m/s at 25 oc. it is determined that this is too fast, and that the rate should be reduced to 0.0046 m/s. what temperature should the reaction be run at to achieve this?
Thus, the required temperature for the reaction to run at a rate of 0.0046 m/s is 30.7°C approximately.
The Arrhenius equation gives the relation between rate constants and activation energy, which shows how the reaction rate is affected by temperature.
It is written as: k = Ae-Ea/RT Where,
k is the rate constant
A is the pre-exponential factor (frequency factor)
Ea is the activation energy
T is the temperature in Kelvins
R is the universal gas constant
Taking natural logs of both sides of the Arrhenius equation we have: ln(k) = ln(A) - Ea/RTln(k) = -Ea/RT + ln(A)
Now we will use the following rearranged form: ln(k2/k1) = -Ea/R (1/T2 - 1/T1)
We can substitute our given values of k2 = 0.0046, k1 = 0.0184, and T1 = 25oC + 273.15K = 298.15K into the above equation to solve for T2, which is the required temperature, as follows:
ln(0.0046/0.0184) = -Ea/R (1/T2 - 1/298.15K)ln(0.25)
= -Ea/R (1/T2 - 1/298.15K)ln(4)
= Ea/R (1/T2 - 1/298.15K)0.013862
= Ea/R (1/T2 - 1/298.15K)(1/T2 - 1/298.15K)
= 0.013862 x (R/Ea)
T2 can be found by rearranging the above equation as follows:
1/T2 = 1/298.15K + 0.013862 x (R/Ea)1/T2
= 1/298.15K + 0.013862 x (8.314 J/K/mol / Ea)T2
= 1 / (1/298.15K + 0.013862 x (8.314 J/K/mol / Ea))T2
= 1 / (0.0033522 + 0.013862 / Ea)T2
= 298.15 / (0.0033522 + 0.013862 / Ea)
Substituting Ea = 50000 J/mol, we have: T2 = 298.15 / (0.0033522 + 0.013862 / 50000)T2 = 303.9 K = 30.7°C (approx)
Thus, the required temperature for the reaction to run at a rate of 0.0046 m/s is 30.7⁰C approximately.
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If you have 100g of C6H12O6 how many moles of C6H12O6 do you have?
suggest and explain why the invention of the haber process. caused the closure of the humberstone mines in chile
In summary, the invention of the Haber process led to the production of synthetic fertilizers, which reduced the demand for natural nitrates from mines like Humberstone, ultimately leading to its closure.
The invention of the Haber process, which is a method of synthesizing ammonia from nitrogen and hydrogen gas, allowed for the production of large amounts of fertilizer. This increased the amount of farmland that could be cultivated and substantially increased crop yields. As a result, the demand for natural resources like nitrate-based fertilizers, which were previously extracted from mines like Humberstone in Chile, decreased significantly.
Humberstone was one of the largest nitrate mines in Chile and was known for producing high-quality nitrate fertilizers. However, the increased production of synthetic fertilizers through the Haber process meant that the demand for natural nitrate-based fertilizers gradually declined. The falling demand for natural nitrates eventually led to the closure of many nitrate mines like Humberstone in Chile.
In addition to the Haber process, other factors such as the discovery of cheaper sources of natural nitrates in other parts of the world and the decline in the price of nitrate also contributed to the closure of the Humberstone mines.
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sdfghtyfd bgdbj. brtkj rdtiurtb biurb dtbrbtvhj rtburtjb vritb tkrj
Answer:
Explanation:
A?
Which statement is correct for
this reaction?
2NaBr + Ca(OH)2 → CaBr2 + 2NaOH
A. The reaction is not a redox reaction because it does include
oxidation number changes.
B. The reaction is a redox reaction because it does not include any
oxidation number changes.
C. The reaction is a redox reaction because it does include oxidation
number changes.
D. The reaction is not a redox reaction because it does not include
any oxidation number changes.
Answer:
c
Explanation:
Answer:
its actually d
Explanation:
I dont know why all I know is c was wrong and d was correct