The maximum number of moles of Fe could be produced is 0.1 option - A is correct.
How are grams and moles converted?The grams to moles formula must be used in order to accurately calculate the number of moles, n, of a substance with a given mass, m, (in grams): M is the material's molar mass, so n = m / M.
According to the periodic table, the molecular mass of iron, to three decimal places, is 55.845 and its elemental symbol is Fe.
Moles = mass/molar mass
Molar mass of Fe = 56
Number of moles of Fe = 8/56
Number of moles of Fe = 0.14moles.
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Be sure to answer all parts. Write a balanced equation and Kb expression for the following Brønsted-Lowry base in water: guanidine, (NH2)2CNH (double bonded N is most basic). Include the states of all reactants and products in your equation. You do not need to include states in the equilibrium expression. Do not include double bonds in your answers below.Balanced equation:Kb expression:[OH- / [(NH2)2CNH)]
The balanced equation for the reaction of guanidine with water is: (NH2)2CNH (aq) + H2O (l) ⇌ (NH2)2CNH2+ (aq) + OH- (aq).
The Kb expression for this reaction is: Kb = [OH-] [(NH2)2CNH2+] / [(NH2)2CNH]
In this reaction, guanidine acts as a Brønsted-Lowry base by accepting a proton from water to form the conjugate acid (NH2)2CNH2+ and the hydroxide ion (OH-).
The Kb expression reflects the equilibrium between the reactants and products, with the concentrations of the products in the numerator and the concentration of the base in the denominator.
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Help plz:))) I’ll mark u brainliest ASAP 10 points
Answer: I believe it’s the second one
(F)
Explanation:
Which of the following describes an impact of the specific heat of water on the planet? (3 points)
A. Islands and coastal places have moderate pleasant climates.
B. Ocean waters experience sudden spikes and drops in temperature.
C. The internal temperature of living organisms varies over a wide range.
D. Inland places have minimal temperatures changes throughout the year.
An impact of the specific heat of the water on the planet is that islands and coastal places have moderately pleasant climates. Therefore, option A is correct.
The specific heat of water is relatively high compared to other substances. This means that water requires a significant amount of heat energy to increase its temperature. As a result, water has a stabilizing effect on the climate of coastal and island regions.
The high specific heat of the water helps to moderate temperature changes, resulting in milder and more pleasant climates in these areas.
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what is the scope of humidity?
Humidity refers to the amount of moisture present in the air or atmosphere. It is a crucial atmospheric parameter that impacts various aspects of our environment and daily lives.
The scope of humidity extends across multiple domains, including meteorology, agriculture, health, and technology. In meteorology, humidity plays a vital role in determining weather patterns, cloud formation, and precipitation. In agriculture, it affects crop growth, irrigation requirements, and pest control. Humidity also influences human comfort and well-being, as high humidity can make temperatures feel hotter and exacerbate respiratory conditions. Moreover, industries such as manufacturing and electronics depend on humidity control to ensure product quality and prevent damage.Understanding and managing humidity levels are essential for optimizing numerous processes, improving human health, and maintaining the balance of ecosystems.For such more question on Humidity
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A scientific law is different from a scientific theory because it describes something in nature without attempting to explain it.
Yes, that statement is generally correct. A scientific law is a statement that describes a phenomenon or pattern in nature, often expressed mathematically, without attempting to explain why it occurs. A scientific theory, on the other hand, is a well-substantiated explanation for a set of phenomena, based on empirical evidence and scientific reasoning.
A scientific law summarizes what happens in a particular situation, often in the form of an equation or formula, whereas a scientific theory attempts to explain why it happens.
For example, the law of gravity describes the attraction between masses, but it does not explain why this attraction occurs. In contrast, the theory of general relativity attempts to explain the underlying principles of gravity, including its effects on the curvature of space-time.
It's worth noting that both scientific laws and scientific theories are based on empirical evidence, but they serve different purposes in scientific inquiry. Laws describe what happens in a particular situation, while theories attempt to explain why it happens.
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For some transformation having kinetics that obey the Avrami equation, the parameter n is known to have a value of 1.5. If the reaction is 25% complete after 125 sec, how long (total time) will it take the transformation to go to 80% completion?
Time taken the transformation to go to 80% completion t = 259.04 sec
From Avrami equation we have
Y= 1 - e^{-Kt^n}
here
Y = 50%
T Time of reaction completion = 148 sec
n = 1.8
putting all value to get constant K
0.5=1- e^{-K*148^1.8}
e^{-K*148^1.8} = 0.5
Taking log on both side
-K*148^{1.8} = -0.693
K=8.59 * 10^{-5}
NOW GIVEN
0.85= 1 - e^{- 8.59 * 10^{-5} *t^1.8}
e^{- 8.59 * 10^{-5} *t^1.8} = 0.15
Taking log on both side
- 8.59 * 10^{-5} *t^1.8 = -1.897
t = 259.04 sec
The speed at which a chemical reaction occurs is called the reaction rate, and it is defined as proportional to the increase in the concentration of a product per unit time and to the. decrease in the concentration. of a reactant per. unit time. Reaction rates. can vary significantly. For instance, cellulose burns in a fire in a matter of fractions of a second, unlike the sluggish, years-long oxidative corrosion of iron under the Earth's atmosphere. The rate typically decreases with time for most reactions. Monitoring the concentration alterations over time allows one to calculate the pace of a reaction.
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PLEASE help, ill mark brainliest. an inflated balloon is left outside overnight. initially, it has a volume of 2.89L when the temperature 32.4 degree celsius and the pressure is 101.87 kPa.the temperature falls to 22.3 degree celsius and the pressure remains constant. what is the volume now?
a) what temperature scale must be used?
b) calculate the new volume
Answer:
B) 2.85 ∘C
Explanation:
A) Kelvin
How many bonds will form between 2 nitrogen atoms? (N2)
no bonds form
O 3
O 2
O1
Answer: Between 2 nitrogen atoms, 3 covalent bonds will form. So answer choice A is the correct answer.
Which describes a likely advantage of the roots that gymnosperms have?
-They are shallow, preventing the plants from growing too tall above ground.
-They are shallow, allowing the plants to easily gather water from Earth’s surface.
-They grow deep, preventing the plants from growing too tall above the ground.
-They grow deep, allowing the plants to gather water from far below Earth’s surface.
please answer quickly! im being timed on EDGE
Answer: They grow deep, allowing plants to gather water from far below Earth's surface- D
Explanation: Sorry I dont have time to explain its D on edgen
To solve this we must be knowing each and every concept related to gymnosperms. Therefore, the roots that gymnosperms grow deep, allowing the plants to gather water from far below Earth’s surface. The correct option is option D.
What is gymnosperms?Unlike angiosperms, and flowering plants, because seeds are closed by fully developed ovaries, or fruits, gymnosperms, or any vascular plant, reproduce by the use of a exposed seed, or ovule.
Many gymnosperms bear their seeds in cones, which are known as "seeds" because they are never visible until they are fully developed. The roots that gymnosperms grow deep, allowing the plants to gather water from far below Earth’s surface.
Therefore, the roots that gymnosperms grow deep, allowing the plants to gather water from far below Earth’s surface. The correct option is option D.
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the number of elements in 2CH4
Answer:mnedd kfj
Explanation:
fr rb r
Venus's atmosphere, while primarily CO2, is also 3.5% nitrogen gas (i.e. mole fraction of 0.035). What is the partial pressure of nitrogen on Venus in kPa given that the total atmospheric pressure is 1334 psi?
The partial pressure of nitrogen on Venus is approximately 321.914 kPa.
To find the partial pressure of nitrogen on Venus, we need to calculate the partial pressure using the mole fraction of nitrogen and the total atmospheric pressure. First, we convert the total atmospheric pressure from psi to kilopascals (kPa) since the mole fraction is given in terms of kPa.
1 psi = 6.89476 kPa
Therefore, the total atmospheric pressure on Venus is:
1334 psi × 6.89476 kPa/psi = 9197.53 kPa
Next, we can calculate the partial pressure of nitrogen using the mole fraction. The mole fraction of nitrogen is given as 0.035, which means that nitrogen makes up 3.5% of the total moles of gas in the atmosphere.
The partial pressure of nitrogen is given by:
Partial pressure of nitrogen = Mole fraction of nitrogen × Total atmospheric pressure
Partial pressure of nitrogen = 0.035 × 9197.53 kPa
Partial pressure of nitrogen = 321.914 kPa
Therefore, the partial pressure of nitrogen on Venus is approximately 321.914 kPa.
It's important to note that the given atmospheric composition of Venus's atmosphere and the total atmospheric pressure are approximate values and can vary depending on specific conditions and measurements.
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does the law of conservation of mass hold true in its original form at present give reason
Answer:
yes
Explanation:
Lavoisier's finding laid the foundation for modern chemistry and revolutionized science. The Law of Conservation of Mass holds true because naturally occurring elements are very stable at the conditions found on the surface of the Earth. Most elements come from fusion reactions found only in stars or supernovae.
Once alchol is in the bloodstrram it will reach the brain I'm a few
Once alcohol is in the bloodstream it will reach the brain in a few seconds to minutes, depending on various factors such as the amount and concentration of alcohol consumed, body weight, metabolism, and other individual factors.
Alcohol's Effects on BrainAlcohol can swiftly cross the blood-brain barrier after it is ingested, having an impact on the brain and neurological system. Depending on the quantity and frequency of drinking, alcohol's effects on the brain can range from minor disturbances in judgment and coordination to more serious consequences including loss of consciousness and, in the worst circumstances, death.
Long-term changes in brain structure and function, such as cognitive impairment and a higher chance of developing specific neurological and mental illnesses, can also result from chronic alcohol consumption.
Once alcohol is in the bloodstream it will reach the brain in a few seconds to minutes, depending on various factors such as the amount and concentration of alcohol consumed, body weight, metabolism, and other individual factors.
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There are four different starting molecules that one might use to synthesize the illustrated alkyl halide as the major product using an electrophilic addition reaction. Please draw all four of them.
Answer:
Explanation:
An electrophilic addition reaction occurs when an electrophile attacks a substrate, with the end result being the inclusion of one or many comparatively straightforward molecules along with multiple bonds.
In the given question, the hydrogen bromide provides the electrophile while the bromide is the nucleophile. The mechanism proceeds with the attack of the electrophile on the carbon, followed by deprotonation. This process is continued with a formation of carbocation and the bromide(nucleophile) finally bonds to the carbocation to form a stable product.
The first diagram showcases the possible various starting molecules for the synthesis while the second diagram illustrates their mechanism.
1. Which solvent is best for the following solute. Explain why
a.
Explain:
a
9:0:
A
CH₂
H₂c
H₂c
b
HC
HC.
CH₂
CH
CH₂
CH₂
HC-0:
The solubility of the solute in the solvent depends on intermolecular interactions.
How does the nature of the solvent affect its ability to dissolve a solute?The nature of the solute and the solvent alone determines how soluble they are in a solvent. In a polar solvent, a polar solute dissolves. In a non-polar solvent, a polar solute is poorly soluble. In a non-polar solvent, a non-polar solute dissolves.
Since the question is incomplete, we can not see what the solute or the solvent ought to have been. However, we must know that the solubility of the solute in the solvent must depend on intermolecular interactions between the both.
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Which of the following can be mixed in solution with NH3 to make a buffer?
Answer:
c. NaOH
Explanation:
just took the quiz
11. In a reaction from number 10, 65.0g of Ni(NO3)2 is reacted with 58.0g KOH. Which is
the limiting reactant? Show your work for credit. (4pts)
Answer:
Ni(NO3)2 is the limiting reactant.
Explanation:
- First, we balance the equation...
Ni(NO3)2 + 2 KOH ---> 2 KNO3 + Ni(OH)2
- Second, we find the moles of each substance...
65g Ni(NO3)2 / 182.703g Ni(NO3)2 = 0.356 mol Ni(NO3)2
58g KOH / 56.1056g KOH = 1.034 mol KOH
- Third, to make the molar ratio equal to each other for comparison, we either multiply KOH by 1/2 or multiply Ni(NO3)2 by 2 to compare the number of moles; because the Ni(NO3)2 to KOH molar ratio is 1 to 2. Note that the multiplication of moles is only for comparison. We do not use these multiplied values. We use the values from step 2...
0.356 mol Ni(NO3)2 * 2 = 0.712 mol Ni(NO3)2
0.712 mol Ni(NO3)2 < 1.034 mol KOH ... Ni(NO3)2 is the limiting reactant.
Who has course hero?I really need the “lion king…Ecology science.” Answer key so I can print it.It wont let me print mines.
Note that the above prompt on Ecology draws it's analysis form a well known story which have been told visually called "The Lion King".
The answers are:
1) Biotic Factors, simply put are living things
2 examples of things from Lion King Introduction are:
3) Abiotic factors are Non -living things.
4) Examples from the introduction are:
MountainWaterDirt5) the symbiotic relationship is called: commensalism.
What is commensalism?Long-term biological interactions known as commensalism occur when individuals of one species benefit while those of the other species suffer neither advantages nor harm.
Ecology which is the study of the environment, allows a person to comprehend how different types of creatures coexist in various kinds of physical settings.
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Full Question:
Although part of your question is missing, you might be referring to this full question:
1) What is Biotic Factors
2) List three biotic factors from the Lion King introduction
3) What is Abiotic factors?
4) List three Abiotic factors from the Lion King introduction
5) The bird riding on the tusks of the elephant feed on insects the elephant stirs up. What kind of symbiotic relationship exists between the two?
An atomic emission spectrum of hydrogen shows three wavelengths:
121.5 nm,102.6 nm, and 97.23 nm
Assign these wavelengths to transitions in the hydrogen atom.
Drag the appropriate items to their respective bins.
We have that wavelengths to transitions in the hydrogen atom.
\(nf=2,ni=1 \rightarrow 121.5nm\\\\ni=1,nf=3 \rightarrow 102.6nm\\\\\ni=1,nf=4 \rightarrow 97.2nm\)
From the question we are told that
121.5 nm,102.6 nm, and 97.23 nm
Generally the equation for wavelength is mathematically given as
\(\frac{1}{\lambda}=R_H*(\frac{1}{nf^2}-\frac{1}{nf^2})\\\\\frac{1}{\lambda}=1.097*10^7*\frac{1}{nf^2}-\frac{1}{ni^2}\)
Therefore
For nf=2,ni=1
\(\frac{1}{\lambda}=1.097*10^7*\frac{1}{2^2}-\frac{1}{1^2}\\\\\frac{1}{\lambda}=121.5nm\)
For ni=1,nf=3
\(\frac{1}{\lambda}=1.097*10^7*\frac{3}{1^2}-\frac{1}{1^2}\\\\\frac{1}{\lambda}=102.6nm\)
For ni=1,nf=4
\(\frac{1}{\lambda}=1.097*10^7*\frac{1}{4^2}-\frac{1}{1^2}\\\\\frac{1}{\lambda}=97.2nm\)
Therefore
The Correct slots are
\(nf=2,ni=1 \rightarrow 121.5nm\\\\ ni=1 ,nf = 3 \rightarrow 102.6nm\\\\\ni=1,nf=4 \rightarrow 97.2 nm\)
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HQ5.40
Homework Answered Due Today, 11:59 PM
The reaction 3H₂(g) + N₂(g) → 2NH3(g) has an enthalpy of reaction of -92.6 kJ/mol. If 1 g of hydrogen and 2 g of nitrogen are
reacted, how much heat is produced (kJ)?
The amount of heat energy produced when 1 g of hydrogen and 2 g of nitrogen are reacted, is -6.61 KJ
How do i determine the heat energy produced?First, we shall obtain the limiting reactant. Details below:
3H₂ + N₂ -> 2NH₃
Molar mass of N₂ = 28 g/molMass of N₂ from the balanced equation = 1 × 28 = 28 g Molar mass of H₂ = 2 g/molMass of H₂ from the balanced equation = 3 × 2 = 6 gFrom the balanced equation above,
28 g of N₂ reacted with 6 g of H₂
Therefore,
2 g of N₂ will react with = (2 × 6) / 28 = 0.43 g of H₂
We can see that only 0.43 g of H₂ is needed in the reaction.
Thus, the limiting reactant is N₂
Finally, we the amount of heat energy produced. Details below:
3H₂ + N₂ -> 2NH₃ ΔH = -92.6 KJ
Molar mass of N₂ = 28 g/molMass of N₂ from the balanced equation = 1 × 28 = 28 gFrom the balanced equation above,
When 28 grams of N₂ reacted, -92.6 KJ of heat energy were produced.
Therefore,
When 2 grams of N₂ will react to produce = (2 × -92.6) / 28 = -6.61 KJ
Thus the heat energy produced from the reaction is -6.61 KJ
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Which set of terms best defines what affects kinetic energy and potential energy, respecrively
What is the function of the esophagus?
The esophagus functions primarily as a transport tube that directs the progression of food and fluids from the mouth to the stomach.
How many grams of NaCl
You would recover 36.525g of NaCl after evaporating all of the water.
How to find the how many grams of NaCl that would be recover when all water is evaporated off of this solution?To find the grams of NaCl that would be recovered after evaporating all the water, we can use the following formula:
mass = moles * molar mass
Where:
Moles = Molarity * Volume
Molarity = 0.250 M
Volume = 2500.0 mL = 2.5 L
Molar mass of NaCl = 58.44 g/mol
mass = 0.250 M * 2.5 L * 58.44 g/mol
mass = 36.525 g
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Mangrove trees grow in swampy areas and have strong roots that hold the soil in place. How is this helpful for the environment?
a
They absorb water from the soil.
b
They overtake the environment.
c
They provide wood for humans.
d
They protect the land from eroding
Mangrove trees' robust roots aid in stabilizing the soil and preventing soil erosion. This is especially crucial in swampy coastal locations, where the soil is frequently loose and prone to wind and wave erosion. Mangrove trees work to stabilize the coastline and stop land erosion by securing the soil in place.
Mangrove trees also aid in removing contaminants from the water, enhancing the quality of the water in coastal areas while serving as an essential home for a variety of wildlife species. Mangrove trees contribute significantly to environmental protection and are an essential component of coastal ecosystems.
Mangrove trees are crucial for environmental preservation because they hold the soil in place and stop erosion in marshy coastal areas. They also provide crucial habitats for numerous wildlife species, stabilize the coastline, and stop the land from being lost to erosion while enhancing water quality by filtering pollutants from the ocean.
Mangrove trees are an essential part of coastal ecosystems overall, and preserving them is essential for preserving a healthy and sustainable environment.
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How many elements are in the compound C2H8O
Answer:
I think 2
Explanation:
The number of atoms in 10. grams of calcium is equal to 6.0 x 1023 multiplied by which number?
Answer:
1.51×10²³ atoms.
Explanation:
From the question given above, the following data were obtained:
Mass of Calcium (Ca = 10 g
Number of atom of Calcium (Ca) =?
The number of atoms present in 10 g of Ca be obtained as follow:
From Avogadro's hypothesis, we understood that 1 mole of any substance contains 6.02×10²³ atoms. This implies that 1 mole Ca contains 6.02×10²³ atoms.
1 mole of Ca = 40 g.
Now, if 40 g of Ca contains 6.02×10²³ atoms.
Therefore, 10 g of Ca will contain = (10 × 6.02×10²³) / 40 = 1.51×10²³ atoms.
Thus, 10 g of calcium contains 1.51×10²³ atoms.
9.16 liters of CO2 weighs how many grams?
Your answer
Answer:
18.0g of CO₂ are present in 9.16L
Explanation:
To solve this question we must use:
PV = nRT
In order to find the moles of the gas and with its molar mass (44.01g/mol for CO₂) we can find the mass of the gas
Assuming STP conditions:
P = 1atm at STP
V = 9.16L
n are the moles of CO₂
R = 0.082atmL/molK
T = 273.15K
Replacing:
PV / RT = n
1atm*9.16L / 0.082atmL/molK*273.15K = n
0.409 moles = Moles of CO₂
The mass is:
0.409 moles CO₂ * (44.01g / mol) =
18.0g of CO₂ are present in 9.16LC2H6O + 3 O2 → 2 CO2 + 3 H2O
How many moles of CO2 is produced with 8.5 g of O2
0.32 mol
5.7 mol
0.53 mol
0.18 mol
The number of moles of CO₂ produced from the reaction of 8.5 g of oxygen gas, O₂ is 0.18 mole (last option)
How do i determine the number of mole of CO₂ produced?We shall begin by obtaining the mole in 8.5 g of oxygen gas, O₂. Details below:
Mass of oxygen gas, O₂ = 8.5 grams Molar mass of oxygen gas, O₂ = 32 g/mol Mole of oxygen gas, O₂ =?Mole = mass / molar mass
Mole of oxygen gas, O₂ = 8.5 / 32
Mole of oxygen gas, O₂ = 0.266 mole
Finally, we shall determine the number of mole of CO₂ produced. Details below:
C₂H₆O + 3O₂ -> 2CO₂ + 3H₂O
From the balanced equation above,
3 moles of O₂ reacted to produce 2 moles of CO₂
Therefore,
0.266 mole of O₂ will react to produce = (0.266 × 2) / 3 = 0.18 mole of CO₂
Thus, the number of mole of CO₂ produced is 0.18 mole (last option)
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The investigators were able to determine that the footprints were made by a Nike, size 10 tennis shoe; however, they couldn’t match it exactly to the suspect’s shoe. What is TRUE about this piece of evidence?
A.
They were unable to find class nor individual characteristics.
B.
They were only able to find class characteristics.
C.
They were only able to find individual characteristics.
D.
They were able to find both class and individual characteristics.
Answer
the correct answer would be A
Explanation:
They were unable to find class nor individual characteristics.
How are ocean waves formed? gravity energy transfer conduction radiation
Answer:
I apologize that I'm late and all But your answer is B. Energy Transfer.
Explanation:
The waves transfer energy to the sand for example.