Calculate the final temperature of the water mixture using the equation T(final) = (m1_T1 + m2_T2) / (m1 + m2), where m1 and m2 are the weights of the water in the first and second containers, T1 is the temperature of the water.
What is the formula to find the final temperature of a mixture?Let T be the final temperature of the mixture of 50g of water at 20°C and 50g at 40°C. Let S represent the water's specific heat capacity. Therefore, a mixture of 50g of water at 20°C and 50g of water at 40°C would have a final temperature of 30°C. The final heat of your substance can be calculated by adding the temperature change to the starting point. Your water's final temperature would be 24 + 6, or 30 degrees Celsius, for instance, if it started off at 24 degrees Celsius. Once more, you solve for T, the final temperature, using the formula q = mcT, but this time you assume that qaluminum = qwater. For aluminium and water, you must check up the specific heat values (c).To learn more about final temperature refer to:
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Given the value of n write the names of molecular formulas of straight chain alkanes. general formula: cnh2n 2
The Alkanes are the compound that contains the carbon - carbon single bond. the general formula for the alkane is CnH₂n₊₂.
The names and the molecular formula for the Alkanes are given as :
If n = 1 , chemical formula is CH₄, name is methane.
If n = 2, chemical formula is C₂H₆. name is ethane.
if n = 3. chemical formula is C₃H₈, name is propane.
if n = 4 , chemical formula is C₄H₁₀, name is butane.
if n = 5 , chemical formula is C₅H12, name is pentane,.
If n = 6 , chemical formula is C₆H₁₄ , name is hexane.
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please help me really quick
True because The only time I can use the "take the sum and divide by the number of integers" method is when I have equal proportions of each isotope is true.
What are integers?The collection of whole numbers and negative numbers is known as an integer in mathematics. Integers, like whole numbers, do not include the fractional portion. Integers can therefore be defined as numbers that can be positive, negative, or zero but not as fractions. On integers, we can carry out all arithmetic operations, including addition, subtraction, multiplication, and division. Integer examples include 1, 2, 5, 8, -9, -12, etc. "Z" stands for an integer. Let's talk about how numbers are defined, their symbol, their kinds, their operations, their rules, and their associated attributes.
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Arrange the following elements in order of increasing metallic character: Fr, Sn, In, Ba, Se. Note: 1 most; 6- least Ba [Select] Se [Select] Fr [Select In [Select] Sn [Select
The elements in order of increasing metallic character are Fr, Ba, In, Sn, Se
The characteristics of a metal, particularly the propensity to lose electrons during chemical reactions, are referred to as an element's metallic character.
An element's capacity to lose its outer valence electrons determines whether or not it has metallic properties. Thermal and electrical conductivity, metallic sheen, hardness, ductility, and malleability are a few examples of characteristics that are associated with metallic character. Caesium is the next most "metallic" element after francium.
Keep in mind that the metallic aspect will often get softer as we approach the upper right corner. And keep in mind that this makes sense since, as we move toward the upper right corner, we start to resemble non-metals more. Fr, Ba, In, Sn, and Se are the least metallic elements in sequence.
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A molecule of Al 2 (SO 4 ) 3 contains:
6 Al atoms
12 S atoms
4 Oatoms
12 O atoms
The answer is 12 Oxygen are present in an Al₂(SO₄)₃ molecule. Aluminum sulfate, or Al₂(SO₄)₃, is a salt, hence option D is correct.
What is Aluminum sulfate?
In aluminum sulfate, there are two atoms of aluminum (Al), three atoms of sulfur (S), and twelve atoms of oxygen (O).
Each of the three sulfate anions (SO42) has four oxygen atoms and one sulfur atom. Sulfate has a charge of -2 and aluminum has an oxidation number of +3.
Water is soluble in the chemical molecule known as aluminum sulfate (Al2 (SO4)3). The substance is mostly utilized as a coagulant in the production of paper, wastewater treatment, and water purification.
Therefore, 12 Oxygen are present in an Al₂(SO₄)₃ molecule.
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balancing chemical equations
(pls help a girl out)
H₂O₂ → H₂O + O₂
Answer:
2H2O2 ---> 2H2O+O2
Explanation:
the answer is: 2 H₂O₂ → 2 H₂O + O₂
explanation:
This reaction is caused by the spontaneous breakdown of hydrogen peroxide into water and oxygen.
2 molecules of hydrogen peroxide and 2 molecules of water are added. Because oxygen is naturally diatomic, the total number of atoms of each element on both sides of the equation is now the same, resulting in a balanced equation.
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2 SO2 (g) + O2(g) = 2SO3(g) Kp = 2 x 10^5 At a certain temperature, SO2(g) and O2(g) react to produce SO2 (g) according to the chemical equation shown above. An evacuated rigid vessel is originally filled with SO2 (g) and O2(g), each with a partial pressure of 1 atm. Which of the following is closest to the partial pressure of O2(g) after the system has reached equilibrium, and why? A) O atm because K2 is very large, nearly all the SO2 (g) and O2(g) are consumed before the system reaches equilibrium B) 0.5 atm, because Kp is very large, nearly all the SO2 (g) is consumed before the system reaches equilibrium, but an excess amount of O2(g) remains at equilibrium C) 1 atm, because Kp is very large, the system is already near equilibrium, and there will be very little change to the partial pressure of O2(g). D) 1.5 atm because Kp is very large, the decomposition of any SO2 (g) that forms increase the amount of O2(g) at equilibrium.
Due to the extremely large Kp, almost all of the SO2 (g) is burned before the system reaches equilibrium, but an excess of O2 (g) remains at equilibrium, resulting in a partial pressure of 0.5 atm once the system has done so.
What exactly is balance?Chemical equilibrium is the condition in which the concentrations of the reactants and products are equal and have no further tendency to fluctuate over time, with no discernible change in the features of the system.The equilibrium moves to the side of the reaction where there are less moles of gas as the pressure increases. When the pressure decreases, the equilibrium moves to favour the reaction that produces more gas molecules.Partial pressure is inversely proportional to volume, according to the ideal gas law. Additionally, it correlates with both the temperature and the amount of moles. At equilibrium, the reaction at room temperature yields the partial pressures of the gases.To learn more about equilibrium refer to :
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Convert 4.34 x 1025 particles of NO₂ gas into grams.
According to the concept of Avogadro's number, there are 3322.26 g in 4.34 x 10²⁵ particles of NO₂ gas.
What is Avogadro's number?
Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.
It has a SI unit of reciprocal mole whose numeric value is expressed in reciprocal mole which is a dimensionless number and is called as Avogadro's constant.It relates the volume of a substance with it's average volume occupied by one of it's particles .
As 46 g of NO₂ gas has 6.023×10²³ particles , thus 4.34 x 10²⁵ particles will be present in 4.34 x 10²⁵×46/6.023×10²³=3322.26 g.
Thus, there are 3322.26 g in 4.34 x 10²⁵ particles of NO₂ gas.
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Calcium nitrate reacts with ammonium phosphate to produce calcium phosphate and ammonium nitrate. If 5.40 mol of calcium nitrate reacts with 3.80 mol of ammonium phosphate to produce 1.6 moles of calcium phosphate, what is the percent yield of the reaction?
The percent yield of the reaction is 34.53%.
Calculating the percent yield of a reaction is an excellent way to measure the efficiency of the reaction and to make sure that all reactants are being used properly.
The equation for this specific reaction is:
5.40 mol calcium nitrate + 3.80 mol ammonium phosphate ---> 1.6 mol calcium phosphate + ammonium nitrate.
By using this equation, it can be determined that the theoretical yield of the reaction should be 4.62 moles of calcium phosphate.
To calculate the percent yield, we must first calculate how much was actually produced in the reaction:
1.6 moles of calcium phosphate/4.62 moles = 34.52% yield.
This means that 34.52% of the theoretical amount was actually produced in the reaction.
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S satellite was in two separate crashes. in both crashes, the satellite had the same mass of 5000kg. The black asteroid has a mass of 1500 X 50 kg and the gray asteroid has a mass of 100 x 50 oh. engineers want to know about the speed and direction of the satellite after the crashes. which crash caused a greater change in velocity for the satellite? please help i will mark you brainliest
According to law of conservation of mass, asteroid with greater mass that is black asteroid of 7500 kg would cause a greater change in velocity for satellite as it has greater mass which on collision would change direction of satellite.
What is law of conservation of mass?According to law of conservation of mass, it is evident that mass is neither created nor destroyed rather it is restored at the end of a chemical reaction .
Law of conservation of mass and energy are related as mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of mass is widely used in field of chemistry, fluid dynamics.
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Which of the following molecules can form hydrogen bonds?
A. HI
B. BH3
C. CH4
D. HF
E. NaH
The molecules which can form the hydrogen bonds is the D) HF. The HF can form the hydrogen bond.
The hydrogen bond is the force of the attraction between the polar molecule that arises by the dipole - dipole interaction between the hydrogen atom that is directly attached to the electronegative atom and the more electronegative atom lies in the vicinity of hydrogen.
The hydrogen bonding in the given molecule is shown below :
H - F ----- H - F ------ H - F ------- H - F ----- H - F
The hydrogen bonding are of two types :
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acetylene c2h2 gas and oxygen o2 gas react to form carbon dioxide co2 gas and water h2o vapor. suppose you have 2.0 mol of c2h2 and 1.0 mol of o2 in a reactor. calculate the largest amount of co2 that could be produced. round your answer to the nearest 0.1 mol
The biggest amount of CO₂ produced when 2 moles of C₂H₂ reacted with 1 mole of O₂ is 0.8 mole.
What is 1 mole?A mole is 6.02214076 x 1023 of the any chemical unit, comprising atoms, molecules, ions, and others. Because of the large number of atoms, molecule, or other components that make up any substance, the mole is a useful measure to utilize
We'll start by writing the balanced reaction equation.This is given below:
2C₂H₂ + 5O₂ —> 4CO₂ + 2H₂O
2 : 5
2 : 1
We can see from the above balanced equation that O2 is the limiting reagent because there is a limited supply of it.
Finally, using the limiting reagent shown below, we will calculate the highest amount of CO2 that was produced:
5 moles of O2 interacted to create 4 moles of CO2 using the equation above.
So,
when 1 mole of O2 reacts, it will result in = 4/5 = 0.8 moles of CO2.
Therefore, 0.8 moles of CO2 are the most that the reaction can create.
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Three salt solutions are to be used in an experiment, a 0.5 g/dm3 solution (solution 1), a 1.5 g/dm3 solution (solution 2) and a 2.5 g/dm3 solution (solution 3). Which solution will contain the fewest salt particles in a particular volume?
Solution 1 will contain the fewest salt particles in a particular volume as it has the lowest concentration of salt.
What is concentration?
Concentration in chemistry refers to the quantity of a material in a certain area. The ratio of the solute in a solution to the solvent or whole solution is another way to define concentration. In order to express concentration, mass per unit volume is typically used. The solute concentration can, however, alternatively be stated in moles or volumetric units. Instead of using volume, concentration can be stated as a mass per unit. Although concentration is typically used to describe chemical solutions, it may be computed for any mixture.
Concentration Examples in Units: g/cm3, kg/l, M, m, N, and kg/L
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Properties of pure substances, Substance X and Substance Y, are given below.
1) Substance X reacts with air
2) Substance Y reacts with air and water
3) Substance X and Substance Y react to produce Substance Z
Which of the following is definitely true about Substance Z?
A. It reacts only with air.
B. It reacts with both air and water.
C. It will neither react with air nor water.
D. It may or may not react with air or water.
The statement that is definitely true about Substance Z, a compound is: It may or may not react with air or water.
The correct option is D.
What are pure substances?Pure substances are substances that are composed of entirely the same type of particles or molecules.
Examples of pure substances are elements and compounds.
Elements are pure substances that are cannot be split into simpler units by an ordinary chemical process. Examples are sodium, oxygen, etc.
Compounds are substances that are composed of two or more elements chemically combined together. Examples are sodium chloride and carbon dioxide.
Considering the properties of Substance Z:
Substance X and Substance Y react to produce Substance Z;
Substance Z is a compound and may have properties different from X and Y.
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Jose’s lab instructor gives him a solution of sodium phosphate that is buffered to a pH of 4. Because of an error that he made while calibrating the pH meter, Jose’s measurements of the pH of the sodium phosphate solution are 5.4, 5.4, and 5.4
Since Jose’s measurements of the pH of the sodium phosphate solution are 5.4, 5.4, and 5.4. The statement that best describes his results is option B: They are precise but not accurate.
What is Jose’s measurements about?In this case, the pH readings that Jose obtained are precise because they are all the same and do not vary significantly. However, they are not accurate because they do not match the actual pH of the solution, which his lab instructor had told him was 4.
Note that Precision refers to how close the results of a measurement are to each other, while accuracy refers to how close the results are to the true or accepted value. It is possible for a measurement to be precise but not accurate, as in this case, or for a measurement to be accurate but not precise. It is also possible for a measurement to be both precise and accurate, or for it to be neither precise nor accurate.
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See full question below
Jose’s lab instructor gives him a solution of sodium phosphate that is buffered to a pH of 4. Because of an error that he made while calibrating the pH meter, Jose’s measurements of the pH of the sodium phosphate solution are 5.4, 5.4, and 5.4.
Which statement best describes his results?
They are accurate but not precise.
They are precise but not accurate.
They are both precise and accurate.
They are neither accurate nor precise.
law of definite proportions 2 of 22 of 2 questions question there are 175.989 g of oxygen to 22.176 g of hydrogen and 144.132 g of carbon (c) in a 342.297 g sample of sucrose (c12h22o11). what is the mass percent of oxygen in sucrose? responses
Sucrose has a mass amount of oxygen of 51.4%.
What is sucrose?Many plants, including sugars sugarcane beets, contain a form of sugar called sucrose. It also goes by the name "table sugar" and is consisting of two simple sugars, both glucose and fructose, that are connected together chemically. It is the most common sugar used in baking and food preparation, and is also used to sweeten beverages and other food items. Sucrose is commonly used in the body for energy, and is broken down into its component sugars for use by cells. It is also the main carbohydrate used for storage in the body, providing quick energy when needed. In addition, sucrose is widely used as a food preservative, preventing spoilage and maintaining the quality of food.
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compared to dichromate oxidizing agents, hypochlorous acid is _____________.
Hypochlorous acid (also referred to as electrolyzed water, EW) is an oxyacid of chlorine (with formula HClO) containing monovalent chlorine that acts as oxidizing or reducing agent.
It is a weak acid and highly unstable and can only exist in solution. The molecules are electron–accepting in oxidation-reduction reactions in which electrons are transferred from one 42 molecule to another.
Electrolyzed water ("electrolyzed water”, EOW, ECA, electrolyzed oxidizing water, electro-activated water or electro-chemically activated water solution) is produced by the electrolysis of water-sodium chloride solution. The electrolysis of such salt solutions produces hypochlorous acid, hypochlorite, and free chlorine.
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what is the "selection rule" for transitions as a result of absorption or emission of a photon?
The "selection rule" for absorption-related transitions results in the absorptive rotational transition selection rule ΔJ=±1.
The potential transitions between quantum levels brought on by the absorption or emission of electromagnetic radiation are specified by selection criteria. An oscillating electric field E0cos(t) caused by incident electromagnetic radiation interacts with a transition dipole. =e.r, where r is a vector pointing in the direction of space, is the dipole operator.
Keep in mind that the quantum numbers J and M represent, respectively, the total angular momentum and the z-component of angular momentum according to physics.
The primary need for spectroscopic transitions is the conservation of angular momentum. As a result, after a molecule absorbs or emits a photon, the entire angular momentum must be conserved.
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What do these two changes have in common?
What do these two changes have in common?
salt and vinegar removing tarnish from a penny
adding dish soap to water in a sink
Select all that apply:
Both are caused by heating
Both are only physical changes
Both converse mass
Both are changes of state
Answer:
Both are chemical changes.
Both converse mass
Explanation:
A fish tank at the pet store has started leaking. It started with 40 gallons of water and is losing 0. 25 gallons per day. If there are currently 38. 5 gallons of water in the tank, how long has it been leaking?.
A fish tank at the pet store has started leaking. It started with 40 gallons of water and is losing 0. 25 gallons per day. If there are currently 38. 5 gallons of water in the tank, the time taken for leaking is 6 days.
The 40 gallons of the water , the 0.25 gallons losses per day.
the water in the tank = 38.5.
The time taken => 40 - 0.25 T = 38.5
The time taken => 40 - 38.5 = 0.25 T
The time taken => T = 1.5 / 0.25
The time taken = > T = 6 days.
Thus time has it been leaking 6 days.
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What is the formula of Sodium Sulfide?
A) Na3S₂
B) NaS₂
C) Na₂S
D) Nas
Answer:C) Na₂S
Explanation:
how many grams of cacl2 are administered in an injection of 5.0 ml of a 5.0%(w/v) solution?
0.25 grammes of calcium chloride are present in an injection of 5.0 ml of a 5.0%(w/v) solution. Solutions include things like soda water and sugar-salt water mixes.
Each component appears as a distinct phase in a solution. The dispersion and homogeneity of the particles are uniform. This explains why a soft drink bottle keeps its flavour the same throughout. An inorganic material is calcium chloride, which is a salt with the chemical formula CaCl2. It is a crystalline white substance that is extremely soluble in water at room temperature. Hydrochloric acid can be produced by neutralising it with calcium hydroxide. 0.25 grammes of cacl2 are present in an injection of 5.0 ml of a 5.0%(w/v) solution.
0.25 is equal to 5 g times (5 mL/100 mL).
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Which of the following pairs of ions represent isoelectronic species? ( All numbers next to element are subscripts)
A)Na^+ and N^2-
B)Al3- and O2-
C)K+ and Na +
D)Cl^- and F-
E) Al3- and P3-
B) Al3+ and O2- are only pair of isoelectronic species in the question mentioned below.
Define isoelectronic species:Isolectronic species are atoms, ions, or molecules that have the same number of electrons and the same electron configuration. They have the same number of protons in the nucleus, which determines the element or atom, but may have different numbers of neutrons. Isolectronic species often have similar chemical and physical properties, such as ionization energy and electron affinity.
Number of electron in both Al3+ and O2- is 10 so both are isoelectronic . and rest all have different number of electron.
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Complete question:
Which of the following pairs of ions represent isoelectronic species? ( All numbers next to element are subscripts)
A)Na^+ and N^2-
B)Al3+ and O2-
C)K+ and Na +
D)Cl^- and F-
E) Al3- and P3-
Using tabulated values from the textbook Resource section or the chemlibre links, calculate the standard reaction entropy of N2(g) + 3 H2(g) → 2 NH3(g). (3 sig figs, units of J/K/mol)
The standard reaction entropy of N2(g) + 3 H2(g) → 2 NH3(g) is -196.3 J/K·mol.
What do you mean by standard reaction entropy?
Standard reaction entropy (ΔS°) is a measure of the disorder or randomness of a chemical reaction at a constant temperature and pressure. It is defined as the change in the entropy of the system when a reaction occurs under standard conditions. The standard state for a substance is its pure form at a pressure of 1 bar and a temperature of 25°C (298 K).
The standard reaction entropy (ΔS°) of a reaction can be calculated using the standard molar entropies (S°) of the reactants and products. The formula to calculate the standard reaction entropy is:
ΔS° = ΣS° (products) - ΣS° (reactants)
To calculate the standard reaction entropy for the reaction: N2(g) + 3 H2(g) → 2 NH3(g)
S° (N2) = 191.8 J/K·mol
S° (H2) = 130.6 J/K·mol
S° (NH3) = 192.5 J/K·mol
ΔS° = [2(S° (NH3)) - (S° (N2) + 3(S° (H2))]
ΔS° = [2(192.5) - (191.8 + 3(130.6))] J/K·mol
ΔS° = -196.3 J/K·mol
Hence, the standard reaction entropy of N2(g) + 3 H2(g) → 2 NH3(g) is -196.3 J/K·mol.
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1s2 2s2 2p6 3s2 3p6 4s1 3d5 is the electronic configuration of
a.
Cr2+
b.
Cu
c.
Cu2+
d.
Cr
Answer:
d. Cr
Explanation:
The electron configuration shows a total of 24 electrons. A nuetral atom with 24 electrons will have 24 protons. The number of protons defines the element. Element 24 is chromium, Cr. Cr2+ isn't valid, since Cr has 24 protons and the +2 charge would mean that that the nucleus would have 26 protons, iron (Fe). Copper, Cu, has 29 protons. Since there are only 24 electrons, the copper would be Cu5+. Same rationale for rejecting Cu2+.
The answer is d. chromium, Cr.
Jose left a place p and drove toward a place q at an average speed of 40 km/h. Rob left some time later driving in the same direction at an average speed of 48 km/h. After driving for five hours rob caught up with jose. How long did jose drive before rob started?.
Jose needs six hours to get there. The object's average speed is the total distance it travels in a predetermined amount of time. A scalar value is used to represent the normal speed. It is characterized by the magnitude and lacks direction.
Given
D(distance)=RT
D=40T
T FOR JOSE IS D/40.
D FOR ROB = 48*5.
From the White House to the recycling facility, it is D miles.
240=40T
T=240/40
Jose's travel time is T=6 Hours.
Calculating the ratio of the body's total distance travelled to the time needed to complete that distance yields the average speed formula. The average speed of an item travelling at a variable speed is calculated using equation.
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Predict the major organic product of the following reaction.
Answer:What is minor and major?
minor is a smaller scale than major, and may be played on lower strings while major is played on higher strings. In the music world, minor scales are often used to create melodies and chord progressions.
Which energy source(s) can cause the turbine to generate electrical energy?
O tea kettle
O faucet
O bicycle
O sun
Recently, the number of elks has increased significantly in a forest. These elks often enter the nearby grassland and eat up all the grass. This is indirectly affecting the livestock industry in that area. Which method might solve the nuisance caused by these excess elks in the fores
The method might solve the nuisance caused by these excess elks in the forest is research. Therefore, option C is correct.
What is forest ?A forest is a land area dominated by trees. Hundreds of definitions of forest are used around the world, with factors such as tree density, tree height, land use, legal standing, and ecological function all being considered.
The word forest comes from the Old French forest (also forès), which means "forest, vast expanse covered by trees"; forest was first used in English to describe wild land set aside for hunting that did not necessarily have trees on it.
A forest is a complex ecological system in which trees predominate. A forest is nature's most efficient ecosystem, with a high rate of photosynthesis that affects both plant and animal systems in a complex web of organic relationships.
Thus, option C is correct.
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Your question is incomplete, probably your question was
Recently, the number of elks has increased significantly in a forest. These elks often enter the nearby grassland and eat up all the grass. This is indirectly affecting the livestock industry in that area. Which method might solve the nuisance caused by these excess elks in the forest?
A- establishing WMA
B- hunting
C- research
D-habitat manipulation
Consider the following equilibrium system at 25°C: HCO3−(aq) + SO42−(aq) ↔ CO32−(aq) + HSO4−(aq) Keq = 4.0 x 10−9
The Ka for HCO3− is 4.8 x 10‒11 at 25°C. What is the Ka for HSO4− at 25°C ?
a. 1.2 x 10−2
b. 2.0 x 10−8
d. 7.2 x 10−4
e. 1.9 x 10−19
f. 8.3 x 101
The Ka for the reaction HCO3−(aq) + SO42−(aq) ↔ CO32−(aq) + HSO4−(aq) at 25°C is 4.0 x 10−9. Using this equilibrium expression and the Ka value of HCO3− at 25°C (4.8 x 10‒11), the Ka for HSO4− at 25°C can be calculated to be 2.0 x 10−8.
To find the Ka for HSO4− at 25°C, we need to use the equilibrium expression for the given reaction and the Ka value of HCO3− at 25°C.
Equilibrium expression: K"eq" = [CO3^2−][HSO4^−]/[HCO3^−][SO4^2−]
Given Ka value of HCO3− at 25°C: Ka = 4.8 x 10‒11
Therefore, Ka for HSO4− at 25°C = 4.0 x 10−9 x (4.8 x 10‒11) = 2.0 x 10−8
The Ka for HSO4− at 25°C is 2.0 x 10−8.
The Ka for the reaction HCO3−(aq) + SO42−(aq) ↔ CO32−(aq) + HSO4−(aq) at 25°C is 4.0 x 10−9. Using this equilibrium expression and the Ka value of HCO3− at 25°C (4.8 x 10‒11), the Ka for HSO4− at 25°C can be calculated to be 2.0 x 10−8. This indicates that the protonation of HSO4− is the more favorable reaction at 25°C.
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_________ are materials that can be made by chemical processes instead of being extracted from a natural resource?
