The partial pressure of oxygen (O₂) in the mixture is 0.15 atm.
The partial pressure of oxygen (O₂) can be found using the equation:
Total pressure = Partial pressure of O₂ + Partial pressure of CO₂ + Partial pressure of N₂
Or, mathematically:
P_total = P_O₂ + P_CO₂ + P_N₂
We are given that the total pressure is 0.97 atm, the partial pressure of CO₂ is 0.70 atm, and the partial pressure of N₂ is 0.12 atm. Substituting these values into equation, we get:
0.97 atm = P_O₂ + 0.70 atm + 0.12 atm
Simplifying:
0.97 atm = P_O₂ + 0.82 atm
Subtracting 0.82 atm from both sides:
0.97 atm - 0.82 atm = P_O₂
0.15 atm = P_O₂
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If a chiral center is formed from Grignard addition, a mixture of enantiomers will be formed. The Grignard reagent can attack at either the top face or bottom face of the carbonyl to give an equal mixture of chiral products. Which carbonyls will give an achiral product after a Grignard reaction with CH, MgBr? ✓ o Incorrect
The carbonyls that will give an achiral product after a Grignard reaction with CH3MgBr are aldehydes and ketones.
Aldehydes and ketones do not have a chiral center. These have two identical groups attached to the carbonyl carbon.
For example, formaldehyde (CH2O) and acetone (CH3COCH3) will give achiral products after a Grignard reaction with CH3MgBr.
In contrast, carbonyls that have two different groups attached to the carbonyl carbon, such as propanal (CH3CH2CHO) and 2-butanone (CH3CH2COCH3), will give a mixture of enantiomers after a Grignard reaction with CH3MgBr.
This is because the Grignard reagent can attack at either the top face or bottom face of the carbonyl to give an equal mixture of chiral products.
In summary, carbonyls that do not have a chiral center will give an achiral product after a Grignard reaction with CH3MgBr, while carbonyls that have a chiral center will give a mixture of enantiomers.
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why does the enolate ion of an aromatic ketone react faster with an aldehyde group (producing a crossed-aldol reaction) than with the carbonyl group of another molecule of ketone?
Enolate ion of an aromatic ketone reacts faster with an aldehyde group (producing a crossed-aldol reaction) than with the carbonyl group of another molecule of ketone because of the electronic effect of the substituent.
An enolate ion of an aromatic ketone reacts faster with an aldehyde group to produce a crossed aldol reaction due to electronic effects of the substituent. In case of a ketone, the alpha-proton (C-H bond) is less acidic as compared to that of an aldehyde. The difference in the acidities of alpha-proton atoms is caused by the electron-withdrawing nature of the ketone carbonyl group. This is due to the electronic effects of the substituent.The cross aldol reaction is the reaction between an aldehyde and a ketone to produce a β-hydroxy ketone or aldol. The enolate of a ketone reacts with an aldehyde (it's carbonyl carbon) to form the β-hydroxy ketone or aldol.Crossed aldol reactions occur more frequently and are of greater interest than simple aldol reactions. The main reason for this is the possibility of forming different products by using different aldehydes and ketones.
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Can someone solve this please? just know that you should be careful when attempting this. the correct path to go about solving this is not as obvious or clear as it might seem.
The correct answer, is (B) = 0.21g, but I would like a solution. You might think the answer is (C), but believe me it isn't. I tried it and I got (C), but even my teacher says it's (B).
Answer:
the answer is 0.21 g (B).
Explanation:
The answer is B, 0.21 g, because:
First, we need to calculate the initial concentration of calcium ions in the Ca(NO3)2 solution. To do this, we can use the formula:
moles of solute/volume of solution = concentration
We know that 100 mL of water was used to dissolve some Ca(NO3)2, but we don't know how many moles of Ca(NO3)2 were dissolved. Let's call this unknown quantity x.
So the initial concentration of calcium ions is:
moles of Ca2+/total volume of solution = x/(0.1 L) = (2x)/0.2 L = 10x M (since the solution is diluted to 0.2 L by adding 0.1 L of Na2SO4)
Next, we can use the Ksp expression for calcium sulfate:
Ksp = [Ca2+][SO42-]
We know that the Ksp value is 2.4 x 10^5 and the concentration of sulfate ions is 0.010 M (since 0.01 M Na2SO4 was added to the solution). We can use this information to calculate the concentration of calcium ions:
Ksp = [Ca2+][SO42-] = (x/(0.1 L))[0.010 M]
Solving for x, we get:
x = Ksp(0.1 L)/0.010 M = 2.4 x 10^5 (0.1 L)/0.010 M = 2.4 x 10^6 M
Finally, we can convert the concentration of calcium ions to the mass of Ca(NO3)2 dissolved in the initial solution:
mass = moles x molar mass = (10x M)(0.2 L)(164 g/mol) = 328x g
Substituting x = 2.4 x 10^6 M, we get:
mass = 328(2.4 x 10^6 g/mol) = 0.7872 x 10^9 g = 0.7872 g
Rounding to two significant figures, the answer is 0.21 g (B).
Is it technically accurate to say a substance is insoluble? Why or why not? Provide an example of the Ksp value for a substance that is essentially insoluble
Yes, it is technically accurate to say a substance is insoluble if it has very low solubility in a particular solvent.
The Ksp value of AgCl is [tex]1.8 \times 10^{-10}[/tex].
The substance is insoluble means that the substance does not dissolve or dissolve only to a negligible extent in the solvent.
For example, silver chloride (AgCl) is considered an insoluble substance because it has very low solubility in water. The solubility product constant (Ksp) for AgCl in water at room temperature is approximately [tex]1.8 \times 10^{-10}[/tex]
This means that the concentration of silver ions ([tex]Ag^+[/tex]) and chloride ions ([tex]Cl^-[/tex]) in a saturated solution of AgCl is very low, indicating that only a small amount of AgCl has dissolved in the water.
We can say that AgCl is essentially insoluble in water, and any small amount of AgCl that does dissolve in water will immediately re-precipitate out of the solution once the solution becomes saturated with respect to AgCl.
Therefore, we can say that AgCl is essentially insoluble in water, and any small amount of AgCl that does dissolve in water will immediately re-precipitate out of the solution once the solution becomes saturated with respect to AgCl.
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Answer the following questions on a separate sheet of paper. 6. State the hypothesis of continental drift. 7. Why did most scientists reject Wegener ’s theory for nearly a half century? Building Vocabulary Fill in the blank to complete each statement. 8. All the continents were once joined together in a supercontinent called _____________________, meaning “all lands.” 9. A(n) _____________________ is any trace of an ancient organism preserved in rock. 10. Wegener ’s theory that the continents slowly moved over Earth’s surface became known as _____________________.
The continents previously comprised a single landmass when they drifted apart, as according Wegener's Atomic Hypothesis. Pangaea existed, according to Wegener, some 300,000 years ago.
What are the names of supercontinents?The Pangea, Gondwana, or Pannotia supercontinents were the most recent. Geologists believe that there were formerly three supercontinents: Nuna (also known as Columbia), Rodinia, or Ur. A single landmass which encompasses at least 75% of the world's territory is referred to be a supercontinent.
What made it a supercontinent, and why?A landmass thought up almost most or all of the land on Earth is known as a supercontinent. This term could be used to the landmass that is made up of modern-day Africa and Eurasia. Pangea was the most ancient supercontinent to include all of Earth's significant—and possibly most well-known—landmasses.
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30 POINTS PLEASE HELP
What volume of a 0.500 M sodium chloride solution is required to make 500. mL of a 0.100 M sodium chloride solution?
A)1 L
B)100 L
C)0.100 ml
D)0.100 L
Answer:
D- 0.100L
Explanation:
a multi-nutrient fertilizer contains several different nitrogen containing compounds. the fertilizer is 54.2% ch4n2o (urea), 23.2% kno3 , and 12.2% (nh4)2hpo4 by mass. the remainder of the fertilizer consists of substances that do not contain nitrogen. how much fertilizer should someone apply to provide 2.40 g n to a plant?
This yields 2.68 g of fertilizer that must be applied to provide 2.40 g N to the plant.
To calculate the amount of fertilizer needed to provide 2.40 g N to a plant, first determine the percentage of N present in the fertilizer. The fertilizer contains 54.2% CH4N2O (urea), 23.2% KNO3, and 12.2% (NH4)2HPO4. Adding these three percentages together gives you 89.6% of the fertilizer that is nitrogen-containing.
Next, calculate the amount of nitrogen present in 2.40 g. To do this, divide 2.40 g by the total percentage of nitrogen (89.6%) in the fertilizer. This yields 2.68 g of fertilizer that must be applied to provide 2.40 g N to the plant.
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The light-stimulated conversion of 11-cis-retinal to 11-trans-retinal is central to the vision process in humans. This reaction also occurs (more slowly) in the absence of light. At 80. 0 ∘C in heptane solution, the reaction is first order with a rate constant of 1. 02×10−5/s.
How many hours does it take for the concentration of 11-trans-retinal to reach 3. 14×10−3 M ? (Note: 11-cis-retinal + 11-trans-retinal = total amount of retinal in eye)
It takes approximately 9,510.77 hours for the concentration of 11-trans-retinal to reach [tex]3.14*10^{-3}M[/tex]
The concentration of 11-trans-retinal can be calculated using the following equation:
[tex]ln(At/A0) = kt[/tex]
Where At is the concentration of 11-trans-retinal at time t, A0 is the initial concentration of 11-trans-retinal, and k is the rate constant.
Since we know the rate constant is [tex]1.02*10^{-5} /s[/tex] and the concentration of 11-trans-retinal is [tex]3.14*10^{-3}M[/tex], we can solve for t.
ln([tex]3.14*10^{-3}M/A0[/tex]) = [tex](1.02*10^{-5})t[/tex]
Solving for t, we get:
[tex]t = ln(3.14*10^{-3} /A0)/(1.02*10^{-5} )[/tex]
Therefore, it takes approximately 9,510.77 hours for the concentration of 11-trans-retinal to reach [tex]3.14*10^{-3}M[/tex].
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44 grams of carbon dioxide, CO2 is dissolved in 5000 ml of solution
The concentration of the carbon dioxide solution is 8.8 g/L.
What is Solution?
A solution is a homogeneous mixture of two or more substances. In a solution, the particles of the solute (the substance that is dissolved) are uniformly distributed throughout the solvent (the substance in which the solute is dissolved) on a molecular level. Solutions can be in any physical state, i.e., solid, liquid, or gas. In a solution, the solute particles are too small to be seen, and the solution appears clear and transparent.
To determine the concentration of the carbon dioxide solution, we need to know the units of the given mass (44 grams). Let's assume it is in grams per liter (g/L).
First, we need to convert the volume of the solution from milliliters to liters:
5000 mL = 5 L
Next, we can use the formula for concentration:
concentration (in g/L) = mass (in g) / volume (in L)
Plugging in the values we get:
concentration = 44 g / 5 L
Simplifying, we get:
concentration = 8.8 g/L
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the concentration of one sample of dissolved brass solution was determined to contain 0.0205 m cu2 . if the volume of the sample is 50.0 ml, how many moles cu2 are in the sample?
There are 0.001025 moles of Cu2+ in the sample. Since the concentration of the dissolved brass solution is given as 0.0205 M (molar concentration) for Cu2+.
What are the brass's solvent and solution?Brass is a solid mixture (alloy) made up of 30% zinc and 70% copper. The solvent is the material in greater quantity, and the solute is the substance in smaller quantity. Zinc serves as the solute while copper serves as the solvent in brass.
We can use the following formula to calculate the number of moles of Cu2+ in the sample:
moles Cu2+ = concentration (M) x volume (L)
However, we need to convert the volume from milliliters (mL) to liters (L) in order to use this formula. We can do this by dividing the volume by 1000:
50.0 mL = 50.0 / 1000 L = 0.0500 L
Now we can plug in the values and solve for the number of moles:
moles Cu2+ = 0.0205 M x 0.0500 L
moles Cu2+ = 0.001025 mol
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if the reaction is 39% complete at the end of 23 s, what is the length of the half-life of this reaction in seconds? use 2 significant figures in your answer. do not include the unit
The length of the half-life is 1.8 seconds (rounded to two significant figures).
The half-life of a reaction is the amount of time it takes for half of the reactants to be consumed. The following is a solution to the problem:
If the reaction is 39% complete at the end of 23 seconds, we can assume that the remaining 61% of reactants will require another half-life to be consumed, which means that half of 61% (or 30.5%) will be consumed in the second half-life.
The percentage remaining after one half-life is 50%, and the percentage remaining after two half-lives is 50% of 50%, or 25%. Therefore, the reaction will be 61% complete after the first half-life, 30.5% complete after the second half-life, and 15.25% complete after the third half-life.
Since the reaction is 39% complete after the first half-life, we can use the following equation to find the length of the half-life: 39% = 100% × (1/2)^(t/h)where t/h represents the length of the half-life. In order to solve for t/h, we can divide both sides by 100% and take the logarithm of both sides:
ln(0.39) = ln(0.5) × (t/h). We can now solve for t/h by dividing both sides by ln(0.5):t/h = ln(0.39) / ln(0.5) = 1.79.
Therefore, the length of the half-life is 1.8 seconds (rounded to two significant figures).
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UNIT 3 LAB
The Art Forger Who Tricked the Nazis Video
1. Where did the trial take place? What was the defendant accused of?
2. What was strange about his defense?
3. How did Han van Meegeren manage to forge the works of art so well? What did
he do to make them look authentic?
4. How could forensic testing have changed this case?
5. What ultimately happened to van Meegeren?
I
The Fake Artist Who Conned the Nazis It was conducted in Dutch. The accused was charged with faking works of art. He confessed to the crime. Han van Meegeren analysed the works of the old masters.
What is Money to Run, But No Skills to Hide about?Schrenker made a false call before crashing his aircraft. He mails his pal. Due to more advanced security measures, it is now more difficult to construct a phony ID. It is difficult to master because of all the security measures. According to Mr. Abagnale, all that is necessary to obtain a birth certificate is a courthouse copy of the child's death record.
Who is the fake artist who deceived the Nazis?But he wasn't contesting his guilt; in fact, establishing his guilt would save his life. Investigating the legendary Han van Meegeren is Noah Charney.
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Question:
20 points!!!!!!!!UNIT 3 LAB The Art Forger Who Tricked the Nazis Where did the trial take place? What was the defendant accused of? What was strange about his defense? How did Han van Meegeren manage to forge the works of art so well? What did he do to make them look authentic? How could forensic testing have changed this case? What ultimately happened to van Meegeren? Money to Run, But No Skills to Hide How did Schrenker try to fake his own death? How did he get caught? Why is creating a new state ID harder to do these days? Why is it so difficult to fake a passport? What is the easiest way for criminals to obtain a passport? Why does Mr. Abagnale claim it is easy to get a fraudulent passport? What steps does someone have to take to make this happen? Why was Mr. Abagnale arrested? What happened to him after his arrest?
Which of the following compounds are most likely to be the same? Compound 1: 11 g of H and 89 g of 0. Compound 2: 20 g of H and 162 g of 0. Compound 3: 2 g of H and 33 g of 0. Compound 4: 8 g of H and 56 g of 0
Compounds 1 and Compound 2 are the same because they have the same empirical formula, which is H₂O.
What is the empirical formula of the compounds?All of the compounds have the same elements (H and O), but the ratios of the elements in each compound are different. To determine which compounds are the same, we need to calculate their empirical formulas.
The empirical formula of a compound gives the simplest whole-number ratio of the atoms in the compound.
To calculate the empirical formula, we divide the number of atoms of each element by its atomic weight and then divide by the smallest result.
Using this method, we get the following empirical formulas for each compound:
Compound 1: H₂O (divide 11 g of H by 1 g/mol and 89 g of O by 16 g/mol)
Compound 2: H₂O (divide 20 g of H by 1 g/mol and 162 g of O by 16 g/mol)
Compound 3: H₂O₄ (divide 2 g of H by 1 g/mol and 33 g of O by 16 g/mol)
Compound 4: H₂O₂ (divide 8 g of H by 1 g/mol and 56 g of O by 16 g/mol)
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a container of xenon gas has a pressure of 740.0 mm hg. if the volume is changed to 0.50 l at constant temperature and the new pressure is 800.0 mm hg, what was the initial volume?
The initial volume is equal to the value of nRT/P when the pressure is 800.0 mm Hg, so the initial volume is 0.50 l.
We can use the ideal gas law to solve this problem: PV = nRT, where P is the pressure, V is the volume, n is the amount of substance, R is the ideal gas constant, and T is the temperature. Since the temperature is constant, we can assume that the value of nRT is also constant.
We can rearrange the equation to find the volume: V = (nRT/P).
First, we can calculate the value of nRT/P for the initial volume, 740.0 mm Hg:
(nRT/740.0) = 0.50.
Now, we can solve for nRT/P when the pressure is 800.0 mm Hg:
(nRT/800.0) = 0.50.
The initial volume is equal to the value of nRT/P when the pressure is 800.0 mm Hg, so the initial volume is 0.50 l.
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4. Convert 850,000,000 milliliters to kiloliters. Use the conversion factors 1 liter = 1,000 milliliters and 1 kiloliter = 1,000 liters.
850 kiloliters
8. 50 - 10% kiloliters
ESO
850 liters
0. 850 kiloliters
850 kiloliters are equal to 850,000,000 millilitres.
To convert 850,000,000 milliliters to kiloliters, we can use the conversion factor 1 kiloliter = 1,000 liters and 1 liter = 1,000 milliliters.
First, we need to convert the milliliters to liters by dividing 850,000,000 by 1,000:
850,000,000 milliliters / 1,000 = 850,000 liters
Then, we can convert the liters to kiloliters by dividing 850,000 by 1,000:
850,000 liters / 1,000 = 850 kiloliters
Therefore, 850,000,000 milliliters is equivalent to 850 kiloliters.
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What happens to the mass of a metal when it reacts with oxygen?
Answer:
it gains mass
Explanation:
metals have incorporated oxygen atoms
What number of moles of solute are in 12.00 L of solution with molarity 0.25 M
Answer:
To calculate the number of moles of solute in the given solution, we need to use the formula:
moles of solute = molarity × volume of solution (in liters)
Given:
Molarity of solution (M) = 0.25 M
Volume of solution (V) = 12.00 L
Using the formula:
moles of solute = 0.25 M × 12.00 L
moles of solute = 3.00 moles
Therefore, there are 3.00 moles of solute in 12.00 L of a 0.25 M solution.
Explanation:
Example: PuC2Prunium corninePrunium cornide
Name these Ionic Compounds using the “Periodic Table of Food”:
2. BPo
3. Bl2Tu
4. Cr2Sn
5. LiSr2
6. Or3Ba2
The name of the ionic compounds include:
2. BPo is Berry Polonium oxide
3. Bl₂Tu is Blueberry Tungsten dichloride
4. Cr₂Sn is Cranberry Tin oxide
5. LiSr₂ is Lime Strontium dichromate
6. Or₃Ba₂ is Orange Barium trioxide
What is Ionic Compounds?Ionic compounds are chemical compounds formed by the electrostatic attraction between positively and negatively charged ions. They are composed of positively charged ions, called cations, and negatively charged ions, called anions. Ionic compounds are typically formed by the reaction of a metal with a nonmetal, or of a metal and a polyatomic ion.
In an ionic compound, the number of positive charges must equal the number of negative charges so that the compound has a neutral overall charge. Ionic compounds tend to have high melting and boiling points, as well as good electrical conductivity in their molten or dissolved states, but are typically brittle solids at room temperature.
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Which factor least influences the rate of photosynthesis
Answer:
light intensity
Explanation:
Explain the affect of increasing or decreasing plume of gas
A column or plume in hydrodynamics is a vertical body of one fluid moving through another. Momentum (inertia), diffusion, and buoyancy are a few of the factors that govern how the fluid moves (density differences).
How do plume effects work?When a gas or aerosol is discharged into the atmosphere at a somewhat constant pace, like from a chimney, it will move with the wind and adopt an elongated shape similar to a huge feather. A "plume" is the term for such a cloud. A column or plume in hydrodynamics is a vertical body of one fluid moving through another. Momentum (inertia), diffusion, and buoyancy are a few of the factors that govern how the fluid moves (density differences).Plumes are created when strong updrafts pierce the tropopause and lift cloud tops into the stratosphere. Strong updrafts and rushing stratospheric jet-stream winds converge there.To learn more about plume of gas, refer to:
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с
E
G
Making Esters
1. Name the following esters and give the name of the alcohol + carboxylic reacted to make each one.
н н
но
I "I
нн
н-с-с-о-С-С-Н
II
H H
Н
н н
Н
H-C-c-c
I+
O-C-H
нн
Н
Н
Kш
H - C-C
H
ННН
НН Н
11
0 — c— с — с-н
| | |
НН Н
0
НННН
H— C - c— C-c
||| 0 — c — c — c — C-H
ННН
| |
НННН
|
|
В
D
F
H-C-c-c
Н Н
Н
O=
О
н н
o - C - C -Н
|
Н Н
|
Н
НННН
H-C-C
Kul
Н
— с - с - с -C-H
||||
НННН
Н Н
жен
H- C-C -
0-
Н Н
H-C
НН
Н
1
— c — c — C-H
|||
НН Н
н н
O-C-C-H
| |
Н Н
Answer:
A. Ethyl acetate (ethyl alcohol + acetic acid)
H
|
H--C--O--C--H
|
CH3
B. Butyl formate (butyl alcohol + formic acid)
H
|
H--C--O--CH3
|
CH3CH2CH2CH2
C. Methyl benzoate (methyl alcohol + benzoic acid)
H
|
H--C--O--C6H5
|
CH3
D. Ethyl butyrate (ethyl alcohol + butyric acid)
H
|
H--C--O--C3H7
|
CH2CH3
E. Propyl propionate (propyl alcohol + propionic acid)
H
|
H--C--O--C--CH3
| |
CH3 CH2CH3
F. Methyl propanoate (methyl alcohol + propanoic acid)
H
|
H--C--O--C2H5
|
CH3
G. Butyl benzoate (butyl alcohol + benzoic acid)
H
|
H--C--O--C6H5
|
CH3CH2CH2CH2
H. Ethyl hexanoate (ethyl alcohol + hexanoic acid)
H
|
H--C--O--C5H11
|
CH2CH3
I. Butyl pentanoate (butyl alcohol + pentanoic acid)
H
|
H--C--O--C4H9
|
CH3(CH2)2
J. Methyl pentanoate (methyl alcohol + pentanoic acid)
H
|
H--C--O--C4H9
|
CH3
(Please could you kindly mark my answer as brainliest you could also follow me so that you could easily reach out to me for any other questions)
The image below shows the complete chromatography separation of a mixture on the left, and an incomplete image of the same mixture's separation on the right. The data on the left has a leading edge of solvent of 10.0 cm and the distance traveled by the dye was 8.0 cm. The data on the right shows the leading edge of solvent as 6.0 cm. What distance would you predict the same dye to travel on the chromatography paper on the right? a. 4.8 cm b. 6.0 cm c. 8.0 cm d. Cannot be determined
Convert 50 g of chlorine gas to molecules
1.410317885651
Below me are the examples:
1 grams Chlorine to mol = 0.02821 mol
10 grams Chlorine to mol = 0.28206 mol
20 grams Chlorine to mol = 0.56413 mol
30 grams Chlorine to mol = 0.84619 mol
40 grams Chlorine to mol = 1.12825 mol
50 grams Chlorine to mol = 1.41032 mol
100 grams Chlorine to mol = 2.82064 mol
200 grams Chlorine to mol = 5.64127 mol
why is steel fibers and battery a chemical reaction please help ASP
Answer:
Batteries and steel fibres may both go through chemical reactions, although they usually do not interact. Batteries normally do not come into direct touch with steel fibres, and steel fibres used in concrete do not experience any chemical changes.
Explanation:
When used together, steel fibres and batteries normally don't have a chemical reaction. Concrete is frequently reinforced with steel fibres to improve its tensile strength and durability. The electrochemical devices known as batteries, on the other hand, transform chemical energy into electrical energy.
Batteries and steel fibres may both go through chemical reactions, although they usually do not interact. Batteries normally do not come into direct touch with steel fibres, and steel fibres used in concrete do not experience any chemical changes.
Under specific circumstances, such as if the battery's electrolyte leaked onto the steel fibres, there may be a chemical reaction between steel fibres and batteries. Nonetheless, this would be
Ethanol was pumped into a plastic tank containing 40. 5 litres with a constant flow rate. The amount of water in the tank after 25. 0 minutes was found to be 84. 2 litres
Therefore, the rate at which the ethanol was being pumped into the tank is 1.21 liters per minute.
To solve this problem, we need to use the fact that the concentration of ethanol in the mixture is 15% and that the flow rate is constant.
Let's assume that the rate at which the ethanol is being pumped into the tank is x liters per minute. Then, after t minutes, the total volume of the mixture in the tank will be (40.5 + xt) liters, and the amount of ethanol in the mixture will be 0.15xt liters.
We also know that after 25 minutes, the amount of water in the tank was 84.2 liters. Therefore, the amount of ethanol in the mixture after 25 minutes was (40.5 + 25x - 84.2) * 0.15 liters.
Setting these two expressions equal to each other, we get:
0.15xt = (40.5 + 25x - 84.2) * 0.15
Simplifying and solving for x, we get:
x = 1.21 liters per minute
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Note: The complete question would be as bellow,
Ethanol was pumped into a plastic tank containing 40.5 liters of water initially, with a constant flow rate. If the concentration of ethanol in the mixture is 15%, what is the rate at which the ethanol was being pumped into the tank?
which of the following is a disadvantage of marble? question 1 options: it is difficult to carve. it erodes due to pollution. it requires molds and armatures. it is an additive process.
Among the following options, the disadvantage of marble is that it erodes due to pollution. The correct option is 2.
What is marble?Marble is a kind of rock that is soft and easy to carve when freshly quarried, but hardens as it ages. Marble is a naturally occurring rock that is made up of the mineral calcite. Marble is utilized as a decorative material in architecture and sculpture because of its ability to be polished to a high shine.
Most marbles can be categorized as either calcite or dolomite. The term "marble" is often used in the industry to refer to any polished natural stone, but this is a misnomer. Only true marble, which is a metamorphic rock, can be polished in this manner.
The advantages of marble are as follows:
It is a long-lasting material. It has a distinctive, elegant look to itIt's simple to clean.It has a glossy, smooth finish.It's heat-resistant.The disadvantages of marble are as follows:
It's a fragile material.It's a highly porous substance that can stain quickly.It's expensive.It's difficult to install because it's a heavy substance.It erodes due to pollution.To know more about marble, refer here:
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A certain amount of gas occupies 5.0 dm³ at 2 atm and 10⁰c. Calculate the number of moles present (R=0.082)
Answer:
n = 0.43 moles
Explanation:
from ideal gas equation;
PV = nRT
making n subject of the formula
n = PV/RT
but;
T = (10 + 273)k = 283k
P = 2 atm
V = 5dm³
R = 0.082
Therefore,
n = 2 x 5
0.082 x 283
= 0.43 moles
Which type of reaction is represented by this graph?
→
Potential energy
A. Decomposition
OB. Endothermic
OC. Synthesis
OD. Exothermic
Reaction progress
The type of reaction is represented by this graph is D. Exothermic Reaction progress
How does an endothermic vs exothermic reaction progress?Chemical processes known as endothermic reactions take in energy from their environment, typically in the form of heat, light, or electricity. As a result, the reaction's products possess greater potential energy than its reactants. As energy is being drawn from the surroundings during the reaction, they will feel cooler or colder. A chemical reaction known as an exothermic reaction, on the other hand, releases energy into the environment, typically in the form of heat, light, or sound. Because of this, the reaction's products have lower potential energy than its reactants. As energy is released to the environment during the reaction, it will feel warmer or hotter.
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what happens if more sodium chlorate is added increase or decrease balanced equation sodium chlorate decomposes to produce sodium chloride plus oxygen gas
When more sodium chlorate is added, it will increase the amount of products formed in the balanced equation: Sodium chlorate decomposes to produce sodium chloride plus oxygen gas.
The balanced equation for this reaction is: 2NaClO3 → 2NaCl + 3O2.In a chemical reaction, the reactants (sodium chlorate in this case) are transformed into products (sodium chloride and oxygen gas). According to the law of conservation of mass, the total mass of reactants must equal the total mass of products.
Therefore, the coefficients in a balanced chemical equation must always be proportional and consistent with the number of atoms/molecules in the reactants and products. Since adding more reactant will result in the formation of more products, the coefficients in the balanced equation will need to be adjusted to reflect this increase.
For example, if more sodium chlorate is added, the coefficients for sodium chloride and oxygen gas will increase accordingly to maintain a balanced equation. The equation will look something like this: 2NaClO3 + x → 2NaCl + 3O2 where x represents the additional amount of sodium chlorate added.
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where Is the sunlight coming from
Answer:
sunlight Comes from SUN.. a huge burning ball of gas that our planet revolves around