The idea is to foretell the formation of a carbonyl compound by the reaction between alcohol and too much pyridinium chlorochromate. An oxidizing agent called pyridinium chlorochromate converts the alcohol group into the 1carbonyl group.
The carbonyl molecule that results from the reaction will depend on the reactant's OH group. Pyridinium chlorochromate [PCC] converts primary OH to aldehydes, whereas it converts secondary OH to ketones, and oxidation of tertiary OH has little effect. Alcohols and pyridinium chlorochromate [PCC] react to create a carbonyl molecule.
From primary alcohols to aldehydes and from secondary alcohols to ketones, pyridinium chlorochromate oxidizes alcohols one step up the oxidation ladder. pyridinium chlorochromate will not oxidize aldehydes to carboxylic acids, in contrast to chromic acid. Comparable to Pyridine (the Collins reagent) and CrO3 will both oxidize primary alcohols to aldehydes. Here are two instances of pyridinium chlorochromate being used.
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When testing the temperature of catalase, what would happen if you changed the temperature using the same tube with the same catalase and hydrogen oxide mixture?.
The hydrogen bonds between molecules of hydrogen peroxide loosen as temperature rises toward the optimal point, facilitating catalase's reaction with the molecules. The enzyme denatures and its structure is affected if the temperature rises above the ideal level.
What is a catalase?The catalase is an enzyme that is responsible for reducing hydrogen peroxide.
What does catalase do?This enzyme is in charge of neutralizing hydrogen peroxide through its breakdownIt hence preserves an ideal level of the molecule in the cell that is also necessary for cellular signaling processesImportance of catalase enzyme:Almost every organism that is exposed to oxygen contains the very common enzyme catalase. In order to prevent oxidative damage, which can happen when cells or other molecules in the body come into contact with oxidative chemicals, catalase serves as a protective barrier in live cells.To learn more about catalase visit:
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The hydrogen bonds between molecules of hydrogen peroxide loosen as temperature rises toward the optimal point, facilitating catalase's reaction with the molecules. The enzyme denatures and its structure is affected if the temperature rises above the ideal level.
What is a catalase?The catalase is an enzyme that is responsible for reducing hydrogen peroxide.
What does catalase do?This enzyme is in charge of neutralizing hydrogen peroxide through its breakdownIt hence preserves an ideal level of the molecule in the cell that is also necessary for cellular signaling processesImportance of catalase enzyme:Almost every organism that is exposed to oxygen contains the very common enzyme catalase.In order to prevent oxidative damage, which can happen when cells or other molecules in the body come into contact with oxidative chemicals, catalase serves as a protective barrier in live cells.To learn more about catalase visit:
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Ethene is exposed to h2 in a solution containing a chunk of solid palladium. if it reacts successfully, the original alkene will:________
If ethene and hydrogen reacts successfully in a solution containing a chunk of solid palladium, the original alkene will become unsaturated.
What is hydrogenation?The term hydrogenation is used in chemistry to describe that addition of hydrogen to an unsaturated compound. Recall that ethene is an un saturated compound (alkene) and one of the reactions that an unsaturated compound can undergo is the addition of atoms or group across the double bond to yield adducts.
In this case, the adduct is a compound that is saturated ad will not have the same properties as ethene because the carbon carbon double bond that was characteristic of ethene has been replaced by a carbon carbon single bond.
Thus, if ethene and hydrogen reacts successfully in a solution containing a chunk of solid palladium, the original alkene will become unsaturated.
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Which of the molecules obeys the octet rule? i. bh3 ii. no2 iii. sf6 iv. o3 v. pcl5 select one: a. choice i b. choice ii c. choice iii d. choice iv e. choice v
The molecule obeying the octet rule is option (D) O3.
According to the octet rule, an atom's outer shell or orbit needs to contain eight electrons for the molecule to be stable. Knowing the number of valence electrons in a molecule is made easier by Lewis structure. The electrons involved in bond-forming and non-bonding electron pairs are known as valence electrons.
Each oxygen molecule in ozone or O3 has six valence electrons.Due to the presence of three oxygen molecules, there are a total of 18 valence electrons (6*3=18). Therefore, the Ozone molecule has a total of 18 valence electrons accessible.
Therefore,The molecule obeying the octet rule is option (D) O3.
The resonance structure of O3 is given below;
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The enthalpy of fusion for Hg is 2.29 kJ/mol. What is the energy change when 78.0 g of Hg melts at −38.8°C?
The enthalpy of fusion for Hg is 2.29 kJ/mol. 0.89 kJ is the energy change when 78.0 g of Hg melts at −38.8°C.
What is Enthalpy of Fusion ?The amount of energy needed to change 1 mole of substance under state change at constant temperature and pressure is called enthalpy of fusion. It is also known as Latent heat of fusion. Unit of enthalpy of fusion is kJ/mol.
How to find the change in energy ?To find the change in energy use this expression:
q = n ΔH
where
q = Energy change
n = number of moles
ΔH = Molar enthalpy
Number of moles (n) = [tex]\frac{\text{Given mass}}{\text{Molar mass}}[/tex]
= [tex]\frac{78.0\ g}{200\ \text{g/mol}}[/tex]
= 0.39 mol
Now put the values in above formula we get
q = n ΔH
= 0.39 mol × 2.29 kJ/mol
= 0.89 kJ
Thus from the above conclusion we can say that The enthalpy of fusion for Hg is 2.29 kJ/mol. 0.89 kJ is the energy change when 78.0 g of Hg melts at −38.8°C.
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Lead is a toxic metal that affects the central nervous system. A Pb-contaminated water sample contains 0.0011% Pb by mass. How much of the water (in mL) contains 150 mg of Pb
Lead is a toxic metal that affects the central nervous system. A Pb-contaminated water sample contains 0.0011% Pb by mass. 13.6 × 10³ ml water contains 150 mg of Pb.
How to calculate the mass of solution ?Given percentage of Pb present in the sample solution is 0.0011%
That means 0.0011 grams of Pb present in the 100g of solution.
So,
= [tex]\frac{0.150\ \text{g Pb} \times 100\ \text{g water}}{0.0011\ \text{g of Pb}}[/tex]
= 13.6 × 10³ g water
What is Density ?The mass per unit volume is called density. Density is represented as D or ρ.
It is expressed as:
[tex]\rho = \frac{m}{V}[/tex]
where,
ρ = Density
m = mass of the object
V = Volume of object
Now put the value in above expression we get
[tex]\rho = \frac{m}{V}[/tex]
[tex]1\ g/ml = \frac{13.6 \times 10^3}{V}[/tex]
V = 13.6 × 10³ ml
Thus from the above conclusion we can say that Lead is a toxic metal that affects the central nervous system. A Pb-contaminated water sample contains 0.0011% Pb by mass. 13.6 × 10³ ml water contains 150 mg of Pb.
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Please help me!!!!!!!!!!!!!
1)The limiting reactant will be aluminum acetate
2) The mass of aluminum hydroxide formed will be 9.75 grams.
Stoichiometric problemThe equation of the reaction is as below:
[tex]Al(C_2H_3O_2)_3 + 3NaOH --- > 3C_2H_3NaO_2 + Al(OH)_3[/tex]
The mole ratio of the 2 reactants is 1:3.
Mole of 100 mL. 1.25 mol/L [tex]Al(C_2H_3O_2)_3[/tex] = 0.1 x 1.25 = 0.125 mol
Mole of 300 mL, 2.30 mol/L NaOH = 0.3 x 2.3 = 0.69 mol
Thus, aluminum acetate is limited.
Mole ratio of [tex]Al(C_2H_3O_2)_3[/tex] and [tex]Al(OH)_3[/tex] = 1:1
Equivalent mole of [tex]Al(OH)_3[/tex] = 0.125 mol
Mass of 0.125 mole [tex]Al(OH)_3[/tex] = 0.125 x 78 = 9.75 grams.
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Which is more precise
164 or 165 if the true value is 167
In calorimetry, what physical quantity do we measure to qualitatively assess if a reaction is endothermic or exothermic?.
The physical quantity used to qualitatively assess if a reaction is endothermic or exothermic in calorimetry is heat.
What is calorimetry?Measurements of heat transferred to or from a substance are determined using calorimetry.
Assessment of the reaction:The heat generated by an exothermic reaction in solution is trapped in the calorimeter when we perform the process, raising the temperature of the solution. Running an endothermic reaction causes the solution's temperature to drop as the reaction's heat source is removed from the solution.Characteristics of endothermic reaction:Any chemical process that takes heat from its surroundings is said to be endothermic. The reaction's activation energy comes from the energy that was absorbed. This kind of reaction is characterized by its cold sensation.Characteristics of exothermic reaction:Exothermic simply means releasing heat. As an exothermic process develops, energy, frequently in the form of heat, is released.In an exothermic reaction, it takes less energy to break bonds in the reactants than is released when new bonds form in the products.To learn more about endothermic and exothermic reactions visit:
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The physical quantity used to qualitatively assess if a reaction is endothermic or exothermic in calorimetry is heat.
What is calorimetry?Measurements of heat transferred to or from a substance are determined using calorimetry.
Assessment of the reaction:The heat generated by an exothermic reaction in solution is trapped in the calorimeter when we perform the process, raising the temperature of the solution.Running an endothermic reaction causes the solution's temperature to drop as the reaction's heat source is removed from the solution.Characteristics of endothermic reaction:
Any chemical process that takes heat from its surroundings is said to be endothermic.The reaction's activation energy comes from the energy that was absorbed.This kind of reaction is characterized by its cold sensation.Characteristics of exothermic reaction:Exothermic simply means releasing heat.As an exothermic process develops, energy, frequently in the form of heat, is released.In an exothermic reaction, it takes less energy to break bonds in the reactants than is released when new bonds form in the products.To learn more about endothermic and exothermic reactions visit:
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Which is a type of star system?
hope my answer is useful..hope my answer is useful..
PLLLEEEAAASEEEE ANSWER QUICK. WHOEVER IS FAST AND RIGHT GETS BRAINLY
What can be done to double the power output of an object?
Neither of these
Both of these
Take half the time to do the work
Double the work done by the object
With a good mask-to-face seal and an oxygen flow rate of 15 L/min, the nonrebreathing mask is capable of delivering up to ______% inspired oxygen.
With a good mask-to-face seal and an oxygen flow rate of 15 L/min, the nonrebreathing mask is capable of delivering up to 90% inspired oxygen.
What is fraction of inspired oxygen?FiO2 is the fraction of inspired oxygen which is explained as the concentration of oxygen inhaled by a person.
Non breather mask:It delivers a high concentration of oxygen. Hence the liter flow will be 8-15L/min with the percentage of oxygen between 60-90%.
The liter flow of nonbreathing mask must not be less than 8L/min.
From the above information we can conclude that the fraction of inspired oxygen for a nonbreathing mask is 90%
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Organic molecules (amino acids) needed to be concentrated to stimulate reactions to form proteins concentration mechanisms do not include:___.
Organic molecules (amino acids) needed to be concentrated to stimulate reactions to form protein concentration mechanisms that do not include Boiling.
Amino acids are natural compounds composed particularly of nitrogen, carbon, hydrogen, and oxygen. Your body desires 20 awesome amino acids to grow and function. amino acid, any of a group of organic molecules that consist of a basic amino group (―NH2), an acidic carboxyl group (―COOH).
fruits have an excessive content of amino acid that allows modify insulin degrees. fruits like bananas, apples, berries, and so forth., are rich resources of amino acids.
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QUICK CHECK
Select the structure corresponding to methylpropylether.
O
Distinguishing Alcohols and Ethers
DONE
The structure that corresponds to methylpropylether is the structure CH3 - O - C3H7 in option C.
What is structure?The structure of a compound is defined as the way in which the atoms in the compound are arranged. We know that a compound is composed of atoms and these atoms are arranged in particular patterns in space. This is the stereochemistry of the molecule.
Now we know that methylpropylether is a compound that contains the methyl group and the propyl group separated by a oxygen atom as is typical of all ethers.
As such, the structure that corresponds to methylpropylether is the structure CH3 - O - C3H7 in option C.
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Blank + BaCl2 = BaSO4 + 2NaCl
How to complete this equation so that it is a Double displacement reaction
The complete equation to following equation to make a double replacement reaction is: Na2SO4 + BaCl2 = BaSO4 + 2NaCl.
What is a double displacement reaction.A double displacement reaction is the reaction that involves the replacement of two elements.
According to this question, barium sulfate (BaSO4) and sodium chloride are produced from the chemical equation given.
This clearly suggests that Sodium sulfate is the missing reactant, hence, the complete equation to following equation to make a double replacement reaction is:
Na2SO4 + BaCl2 = BaSO4 + 2NaCl.
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Which state of matter is being described below?
It cannot be squashed easily, spreads out slowly, is of medium density & flows to
fill up space
A. Plasma
B. Liquid
C. Gas
D. Solid
Answer:
C. Gas
Explanation:
I think this is the right answer because it fits the description
In a titration of a monoprotic weak acid with sodium hydroxide, the ph at the half-equivalence point is 4. 20. What is the experimental ka value of this acid?.
Ka value of monoprotic weak acid:
The experimental ka value of this acid is 6.3 × [tex]10^{-5}[/tex]
Half-equivalence point:
The pH of the solution will be equal to the pKa of the weak acid at the half-equivalence point.At the equivalence point, the strong base OH- will neutralize the weak acid in the case of a weak monoprotic acid, which I'll denote as HA.HA + OH⁻ → A⁻ + H₂OThe moles of OH are equivalent to the moles of the acid since the acid is monoprotic:
At half equivalence point, pH = pKₐ
The pKa is determined by the weak acid's Ka acid dissociation constant.
pKₐ = -log(Kₐ)
Kₐ = [tex]10^{-pKa}[/tex]
At the half equivalence point,
Kₐ = [tex]10^{-pH}[/tex]
Given,
pH = 4.20. By putting the value;
Kₐ = [tex]10^{-4.20}[/tex]
= 6.3 × [tex]10^{-5}[/tex]
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A generic element, Q, has two isotopes, 195Q and 190Q, and an average atomic mass of 191.86 amu. The natural abundances of the two isotopes are 38% 195Q and 62% 190Q. The isotopic mass of 195Q is 194.96 amu. What is the isotopic mass of 190Q
A generic element, Q, has two isotopes, 195Q and 190Q, and an average atomic mass of 191.86 amu. The natural abundances of the two isotopes are 38% 195Q and 62% 190Q. The isotopic mass of 195Q is 194.96 amu. the isotopic mass of 190Q is 186.80.
What do you mean by Isotopes?Isotopes are two or more atom types that share the same atomic number (number of protons in their nuclei), location in the periodic table, and chemical element but have distinct nucleon numbers (mass numbers) as a result of having a different number of neutrons in their nuclei. Although the chemical properties of each isotope of a given element are nearly identical, they differ in their atomic weights and physical characteristics.
191.86 =(62% x 194.96 + 38% x X )
where, X is the mass of other Isotope.
X = (191.86 - 120.8752)/0 .38
= 186.80
Parent and Daughter IsotopesThe initial radioisotope and the isotope that results from radioactive decay may not be the same. The atoms created by the reaction are known as daughter isotopes, whereas the original isotope is known as the parent isotope. It's possible to get different kinds of daughter isotopes.
As an illustration, the uranium atom is the parent isotope and the thorium atom is the daughter isotope when U-238 decays into Th-234.
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Complete the charge balance equation for an aqueous solution of h2co3 that ionizes to hco−3 and co2−3.
The relevant coefficients for each species on the right side of the equation in order to balance the charges.
We can add a coefficient of 2 to HCO³⁻ and a coefficient of 1 to CO3- because the charges must cancel out: H₂CO₃ ⇌ 2HCO³⁻ + CO₃²⁻-
The charges balance is now: No initial charge
Charge total: 2(-1) + (-2) = -4
Due to the balance of the charges, the charge balance equation is as follows: H₂CO₃ ⇌ 2HCO³⁻- + CO₃²⁻.
,Thus, The charge balance equation is as follows: H₂CO₃ ⇌ 2HCO³⁻- + CO₃²⁻.
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Which equation agrees with the ideal gas law?
StartFraction V subscript 1 over T subscript 1 EndFraction equals StartFraction V subscript 2 over T subscript 2 EndFraction.
V subscript 1 n subscript 1 equals V subscript 2 n subscript 2.
P subscript 1 n subscript 1 equals P subscript 2 n subscript 2.
StartFraction P subscript 1 over P subscript 2 EndFraction equals StartFraction T subscript 2 over T subscript 1.
The equation for ideal gas law is written as PV = nRT.
What is Ideal gas law?Ideal gas law states that, the volume of a given amount of gas is directly proportional to the number on moles of gas, directly proportional to the temperature and inversely proportional to the pressure.
PV = nRT
where;
P is pressure of the gasV is volume of the gasn is number of molesR is ideal gas constantT is temperatureThus, the equation for ideal gas law is written as PV = nRT.
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How many moles of sucrose are in 5.25x10^29 sucrose molecules?
Answer:
8.72×10^5
Explanation:
Answered it in the comments! ^^
1.For the first ten reactions, write a balanced reaction for each tube in which a reaction occurred. If there was no reaction, write NR
The equations of reaction occurring in the tubes are as follows:
2 MnO₄⁻ + 6 Br⁻ + 8 H⁺ → 2 MnO₂ + 3 Br₂ + 4 H₂O2 MnO₄⁻ + 6 I⁻ + 8 H⁺ → 2 MnO₂ + 3 I₂ + 4 H₂ONo reaction2 Fe³⁺ + 2 I⁻ → 2 Fe²⁺ + I₂What are the reactions occurring in the tubes?The reactions occurring in the tubes are redox reactions.
Based on the table the equations of reaction are as follows:
2 MnO₄⁻ + 6 Br⁻ + 8 H⁺ → 2 MnO₂ + 3 Br₂ + 4 H₂O2 MnO₄⁻ + 6 I⁻ + 8 H⁺ → 2 MnO₂ + 3 I₂ + 4 H₂ONo reaction2 Fe³⁺ + 2 I⁻ → 2 Fe²⁺ + I₂In conclusion, redox reaction are reactions in which electrons are transferred.
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Which of the following can easily form an ionic bond with a cation?
Sr
Ne
NH4+
PO43–
PO43- can form an ionic bond with a cation.
The chemical species which can easily form an ionic bond with a cation will be.
The definition of an ionic bond is a chemical bond that is formed between two ions that have opposite charges.
An Ionic bond is formed when one atom gives up one or more electrons to another atom.
These bonds can easily form between a pair of atoms or between molecules. This kind of bonding is most widely seen in bonds present in salts.
Compared to other options given, is the best option as the total number of 32 valence electrons, is the highest among the given choices. Its tendency to form ionic bonds with the other cation is much higher as compared to others.
P has 5 electrons which combine with 4 O atoms which have 6 lone pairs and a -3 charge on it, which means it is accepting 3 electrons so it will be (+3), so total valence electrons will be 5 + 6 (4) + 3 = 32.
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What is different about atoms after a redox reaction has happened?
A. They have changed physical states.
B. Their oxidation states have changed.
C. The number of protons has changed.
D. They have higher electronegativities.
SUBMIT
In the reaction catalyzed by the pyruvate dehydrogenase complex, the two carbons constituting the acetyl group are
Transferred to the lipoamide by an earlier intermediate in the process.
The pyruvate dehydrogenase complex (PDC) is a mitochondrial multienzyme complex composed of three different enzymes
What reaction is catalyzed by enzyme 2 of the pyruvate dehydrogenase complex ?the pyruvate dehydrogenase complex is the bridge between glycolysis and the citric acid cycle
Five coenzymes are used in the pyruvate dehydrogenase complex reactions: thiamine pyrophosphate or TPP, flavin adenine dinucleotide or FAD, coenzyme A or CoA, nicotinamide adenine dinucleotide or NAD, and lipoic acid.during the reactions catalyzed by the pyruvate dehydrogenase complex, it is first reduced to dihydrolipoamide, a dithiol or the reduced form of the prosthetic group, and then, reoxidized to the cyclic form.Learn more about Pyruvate dehydrogenase complex here:
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Amines suitable for preparing buffers are often synthesized by treating ammonia with epoxides. Consider the following series of reactions, and draw the structure of compound B.
It is correct to state that Amines are suitable for preparing buffers are often synthesized by treating ammonia with epoxides. The relative structures of compound B are attached accordingly.
What is an Amine?Amine is a family of basic chemical compounds formed by replacing hydrogen with one or more monovalent hydrocarbon radicals.
Apart from medications and pharmaceuticals, amines are employed in the production of azo-dyes and nylon.
They are commonly employed in the development of crop protection, pharmaceutical, and water purification chemicals. They are also used in personal care products.
Ethanol amines are the most widely utilized form of amine on the global market.
It should be noted that ammonia attacks epoxides at the least substituted carbon to produce (A.)
The generated product is then made to react with another epoxide, resulting in the synthesis of successive products.
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What is the order in which electrons start filling the orbitals?
a. 1s 2s 2p 3s 3p 4s 3d 4p
b. 1s 2s 2p 3s 3p 3d 4s 4p
c. 1s 2s 2p 3s 4s 3p 3d 4p
d. 1s 2s 2p 3s 4s 4p 3p 3d
e. 1s 2s 2p 3s 4s 3p 4p 3d
a. 1s 2s 2p 3s 3p 4s 3d 4p is the correct option.
This gives the following order to fill the orbit: 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p, (8s, 5g, 6f, 7d, 8p, and 9s)
Aufbau's principle states that electrons fill low-energy atomic orbitals before they fill high-energy atomic orbitals. .. By following this rule, you can predict the electron configuration of an atom or ion.
There may be two electrons at the maximum of one orbit. Since the s subplane has only one orbit, it can hold up to two electrons. The p subplane has three orbitals, so it can hold up to six electrons. The d-subplane has five orbitals, so it can hold up to 10 electrons.
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What substitute for fossil fuel depletion has been heralded as the solution to the nation’s energy problems??
The renewable energies are the substitute for fossil fuel depletion has been heralded as the solution to the nation’s energy problems.
The benefits of renewable energies to the environment and economic are as follows.
The renewable energies produces less global warming.It also reliable and resilience.The renewable energies helps to improve public health.Through renewable energies ,jobs and other economic gets benefits.The prices of renewable energies is stable.The renewable energies is inexhaustible energy.learn about renewable energies
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In texas, special elections are used to:
In Texas, special elections are used to ratify amendments to the Texas Constitution.
What is Election?This is referred to a formal way of people voting for someone or for a type of cause.
Special elections which are held in Texas is done to ratify amendments to the constitution and is usually done by the legislature thereby making it the most appropriate choice.
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Help Pls!!
A mixture of methane (CH₄) and butane (C₄H₁₀) at one atmosphere pressure and 25°C has a density of 1.375 g/L. Assuming ideal behavior, what is the mass in grams of carbon that are in 1 liter of the mixture?
The mass of carbon in 1 liter of mixture = 1.108 g
What is the mass of carbon in 1 liter of the mixture?The mass of carbon in 1 liter of the mixture is determined as follows:
First the moles of gas is determined using the ideal gas formula:
n = PV/RTn = (1 * 1)/(0.08205L * 298)
n = 0.0409 mole of total gas
mass of gas is then determined using the formula:
mass = density * volumemass = 1 * 1.375
mass = 1.375 g
Let x = mass of CH₄ and y = mass of C₄H₁₀
x + y = 1.375 g
nCH₄ + nC₄H₁₀ = ntotat
moles = mass/molar mass
x + y = 1.695 => y = 1.695 - x
(x/molar mass of CH₄) + [(1.375 - x)/ molar mass C₄H₁₀ = 0.0409
x/16 + (1.375 - x)/58 = 0.0409
x = 0.380 g CH₄
y = 1.375 - 0.380
y = 0.995 g of C₄H₁₀
mass of C in CH₄ = 12/16 * 0.380 = 0.285
mass of C in C₄H₁₀ = 48/58 * 0.995 = 0.823
Mass of carbon in 1 liter of mixture = 0.285 + 0.823
Mass of carbon in 1 liter of mixture = 1.108 g
In conclusion, the carbon is the major component in the mixture.
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Consider the following equation in chemical equilibrium. C2H4(g) H2(g) C2H6(g) 137 kJ What happens to the amount of ethane (C2H6) when the temperature of the system is increased
The amount of ethane decreases
increasing the temperature (adding energy), will drive the reaction to the left
What happens to the amount of ethane (C2H6) when the temperature of the system is increased ?C2H4(g) <--> C2H6(g) + 137 kJ
because this reaction is an exothermic reaction and the heat is a product of this reaction, So when the number of temperature increases
so (more heat will be added) so the reaction will go leftward (toward reactants ) so the amount of C2H4 & H2 will increase and the amount of ethane C2H6 will decrease.Learn more about Chemical Equilibrium here:
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