The theoretical yield is 5.154 g
What is P- aminophenol?
White, reddish-yellow, or light brown crystals or powder make up P-AMINOPHENOL. when exposed to light, becomes violet. (NTP, 1992) One of the three potential isomers of amino phenol is 4-aminophenol, which has a single amino substituent next to the phenolic -OH group. As a metabolite, it serves a purpose.
Given,
P- aminophenol = 6.944 g
M.W OF P- aminophenol = 109.15 g/mol
Acetic anhydride = 3.490 g
M.W of acetic anhydride = 109.09 g/mol
M.W of acetaminophen = 151.16 g/mol
M.W of acetic acid = 60.052 g/mol
STEP 1
Calculate the mole of a given reactant
Mole of p-aminophenol = 0.0636 mol
Mole of acetic anhydride = 0.0341 mol
STEP 2
Write the balanced chemical equation
H2NC6H4OH + (CH3CO)2O → C8H9NO2 + CH3COOH
at t=o 0.0636 mol 0.0341 mol
at t-=t 0.02965mol 0 mol 0.0341 mol 0.0341 mol
here, we can see that 1 mole of p aminophenol reacts with 1 mole of acetic anhydride and gives 1 mol of acetaminophen and 1 mole of acetic acid.
Therefore acetic anhydride is a limiting reactant because it has less mole than p- aminophenol
So,
0.0341 mole of acetaminophen will form.
Theoretical yield of acetaminophen = mole X M.W = 0.0341 X 151,1 = 5.154g
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a sociology professor has created a new assessment of political awareness. in using the assessment, she has determined that political awareness is normally distributed in college students with a population mean of 35.3 and a population standard deviation of 8.6. using the z-score found for the question above, what proportion of the population falls below a score of 22 on this test? round your answer to four decimal places.
the score by the sociology professor was -1.54
what is sociology ?
Sociology is a social science that studies society, human social behaviour, patterns of social interactions, social interaction, and cultural elements of daily life. It employs a variety of empirical inquiry and critical analysis techniques. 3-5 to build a foundation of knowledge on social order and social change 32–40 While some sociologists perform research that may be immediately applied to social policy and welfare, others are primarily concerned with improving theoretical knowledge of social processes and the phenomenological approach. The topics covered might range from micro-level studies of society (i.e., individual interaction and agency) to macro-level assessments of society (i.e. of social systems and social structure).
the mean (m) is = 35.3,
standard deviation = 8.6
P x <22
z = (x - m) / sd
We have all these values, replacing we have:
z = (22 - 35.3) / (8.6)
z = -1.54
22 score to z-score is -1.54
therefore the score was 22 score to z-score is -1.54
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According to the following reaction, how much energy is evolved during the reaction of 32. 5 g b2h6 and 72. 5 g cl2? the molar mass of b2h6 is 27. 67 g/mol.
The energy is evolved during the reaction is 237.6 kJ
the reaction is given as:
B₂H₆ + Cl₂ ----> 2BCl₃ + 6HCl
mass of B₂H₆ = 32.5 g
mass of Cl₂ = 72.5 g
molar mass of B₂H₆ = 27.67 g/mol
number of moles of B₂H₆ = mass / molar mass
= 32.5 / 27.67
= 1.17 mol
number of moles of Cl₂ = mass /molar mass
= 72.5 / 71
= 1.02 mol
6 mol of Cl₂ = 1 mol of B₂H₆
1.02 mol of Cl₂ = 1.02 / 6 = 0.17 mol
1 mole of B₂H₆ = 1396 kJ/mol
0.17 mol B₂H₆ = 0.17 × 1396
= 237.6 kJ
The energy of the reaction = 237.6 kJ.
Thus, According to the following reaction, energy is evolved during the reaction of 32. 5 g B₂H₆ and 72. 5 g Cl₂ the molar mass of B₂H₆ is 27. 67 g/mol is 237.6 kJ.
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How would an increase in temperature affect evaporation?
F) it would end evaporation
G) it would speed up evaporation
H) it would slow down evaporation
J) temperature does not affect evaporation
Answer:
G) It would speed up evaporation.
Explanation:
As the temperature increases, the rate of evaporation also increases.
If the reaction of 150. G of ammonia with 150. G of oxygen gas yields 87. G of nitric oxide (no), what is the percent yield of this reaction?.
The percentage yield of the given reaction is 77.33%.
What is percentage yield?
Reactants frequently produce fewer product quantities than predicted by the chemical reaction's formula. The percentage of a theoretical yield that's been produced in a reaction is calculated using the percent yield formula. Working through a stoichiometry problem yields the theoretical yield, which is the ideal quantity of the final product. The actual yield is determined by calculating the volume of the product formed. We can determine the percentage yield by dividing the actual yield by the theoretical yield.
Moles is calculated by using the formula:
Moles of Ammonia:
Given mass of ammonia = 150g
Molar mass of ammonia = 17 g/mol
Putting values in above equation, we get:
Moles of Oxygen
Given mass of oxygen = 150g
Molar mass of oxygen = 32 g/mol
Putting values in above equation, we get:
For the given chemical equation:
By Stoichiometry,
5 moles of oxygen reacts with 4 moles of ammonia.
So, 4.6875 moles of oxygen will react with = of ammonia
As, moles of ammonia required is less than the calculated moles. Hence, ammonia is present in excess and is termed as excess reagent.
Therefore, oxygen is considered as a limiting reagent because it limits the formation of products.
By Stoichiometry of the given reaction:
5 moles of oxygen gas produces 4 moles of nitric oxide
So, 4.6875 moles of oxygen gas will produce = of nitric oxide
Now, to calculate the theoretical amount of nitric oxide, we use equation 1: Molar mass of nitric oxide = 30 g/mol
Given mass of nitric oxide = 112.5 g
Now, to calculate the percentage yield, we use the formula:
Experimental yield = 87 g
Theoretical yield = 112.5 g
Putting values in above equation, we get:
Hence, the percentage yield of the given reaction is 77.33%.
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Write a balanced half-reaction for the reduction of nitrate ion to gaseous nitrogen dioxide in acidic aqueous solution. Be sure to add physical state symbols where appropriate.
To determine the number of atoms of each element we need to multiply stoichiometry that is written in front of the molecule to the number that is written on the foot of the element. Hence, the balanced chemical equation for the reduction of nitrate ion to gaseous nitrogen dioxide in acidic aqueous solution is NO₂ (g) + H₂O (l) → NO³⁻ (aq) + 2H⁺ + e⁻.
Balanced chemical equation
Balanced equation is defined as the reaction where the number of atoms of each species is same on reactant and product side. In balanced equation mass can neither be destroyed nor be created.
The skeletal equation can be written as:
NO₂ (g) + H₂O (l) → NO³⁻ (aq) + 2H⁺ + e⁻.
The number atoms of N on reactant and product side is 1 so N is balanced.
The number of atoms of H is 2 on reactant and on product side it is 2. So, H is balanced.
The number of atoms of O is 3 on reactant and on product side it is 3. So, O is balanced.
Hence, the balanced chemical equation for the reduction of nitrate ion to gaseous nitrogen dioxide in acidic aqueous solution is:
NO₂ (g) + H₂O (l) → NO³⁻ (aq) + 2H⁺ + e⁻
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patterns of reactivity quick check
Reactivity decreases as you move from left to right. The farther to the left and down the periodic chart you move, easier it is for electrons to be given or taken away, hence resulting in higher reactivity.
What is the pattern of reactivity in periodic table?Reactivity decreases as we move down the column. As you learn more about the table, you will be able to find that this pattern is true for other families.
The atoms get bigger, as the atomic number increases. The chemical properties change slightly when compared to the element right above them on the table. The non-metal elements in Group 7 that are known as the halogens, get less reactive as you move to the down of the group.
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ampicillin amoxicillin mezlocillin and penicillin g all have
Ampicillin is a type of aminopenicillin, a semisynthetic class of β-lactams that were created for effectiveness against both gram-negative and gram-positive organisms. It is also referred to as a broad-spectrum penicillin. Penicillin was combined with an amino group or side chain to produce aminoopenicillins.
What is β-lactams ?
Antibiotics known as β-lactams have a beta-lactam ring as part of their chemical structure. This comprises carbapenems, cephalosporins, monobactams, cephamycins, and derivatives of penicillin.
Ampicillin belongs to the penicillin drug class. It eliminates bacteria to operate. Colds, the flu, and other viral diseases cannot be treated with antibiotics like ampicillin. Antibiotic use that is not necessary raises the likelihood of developing a later infection that is resistant to antibiotic treatment.
Thus, Ampicillin is a type of aminopenicillin, a semisynthetic class of β-lactams that were created for effectiveness against both gram-negative and gram-positive organisms.
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predict the ordering, from shortest to longest, of the bond lengths in co, co2, and co2−3. but why does (CO3)2− have a longer bond length than CO2?
The bond length order becomes: CO < CO₂ < CO₃⁻².
What is bond order?The total amount of covalent bonds that two atoms have together. A single bond exists when two atoms share one pair of electrons (bond order = 1). Two pairs of electrons make up a double bond (bond order = 2), whereas three pairs of electrons form a triple bond (bond order = 3).
CO has triple bond.
CO₂ has double bond and
CO₃⁻² has a nature in between double and triple bond.
Thus, the bond length order becomes: CO < CO₂ < CO₃⁻².
As, we all know, bond order has an inverse relationship with bond length. That is, longer bonds are stronger bonds. CO has a bond order of 3 (triple bond), CO₂ has a bond order of 4 (two double bonds), and CO₃⁻² has a bond order of 1.33. ( bond nature between single and double bonds). That's why CO₃⁻² have a longer bond length than CO₂.
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larry made this picture to represent a chemical reaction: there are two circles on the left, one white and the other gray, and there is a plus sign between them. the white circle is labeled x and the gray circle is labeled y. an arrow pointing right is shown on the right of the circles. two circles, one white and the other gray are shown on the right. a small portion of the two circles overlap and the label below the circles is xy. which of the following statements best explains the type of chemical reaction represented by larry's picture? it represents a synthesis reaction because two reactants form one product. it represents a synthesis reaction because the total mass of the product is less than the mass of the reactants. it represents a decomposition reaction because one reactant breaks apart and forms two products. it represents a decomposition reaction because the same atoms are present in the reactants and products.
The statement which best represents chemical change carried out by Larry is that it represents a synthesis reaction because two reactants form one product.
Chemical changes are defined as changes that occur when a substance combines with another substance to form a new substance.Alternatively, when a substance decomposes or breaks down to give new substances which is also considered to be a chemical change.
There are several characteristics of chemical changes like change in state, change in color , change in composition and change in odor . During chemical change there is even formation of precipitate which is an insoluble mass of substance or even evolution of gases.
As two reactants are combining to form a product it represents a synthesis reaction.
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B. The Lewis diagram for AsO2 is: :0-as=0 Recall that for predicting geometry, double and triple bonds count as only one electron pair region. The electron-pair geometry around the As atom in AsO2 is trigonal plantar There are unshared pair(s) around the central atom, so the geometry of the AsO2 molecule is bent
The Lewis structure of the arsenite is shown in the image attached.
What is the Lewis structure?We know that the Lewis structure of a compound can help us to be able to see the way that there can be a good arrangement of the atoms that we have in the compound.
There are two parts of the Lewis structure and they are;
-The symbol of the element
-The electrons in the elements shown as dots
For the arsenite, we can see tat we have one atom of arsenic and then we have two atoms of oxygen in the Lewis structure of the compound. The compound is linear in molecular geometry but the electron domain geometry is trigonal planar.
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predict the major product for the reaction shown.
The product of the reaction is m-nitrobenzaldehyde, option B.
What is m-nitrobenzaldehyde?M-nitrobenzaldehyde, also known as meta-nitrobenzaldehyde is an organic aromatic compound that contains a nitro-group which is meta substituted to an aldehyde. It is soluble in water at 2.34 mg/ml and a temperature of 25° C. It is also soluble in ethanol, benzene and slightly in ether. M-nitrobenzaldehyde production process is prepared by nitration.
The carboxylic group is meta directing and has an ortho-para deactivating group therefore, during nitration of benzaldehyde, meta position gains an attachment from the nitro group forming m-nitrobenzaldehyde as product.
The full question is:
Predict the major product for the reaction shown.
a. o-cyanonitrobenzene & p-cyanonitrobenzene
b. m-nitrobenzaldehyde
c. o-cyanonitrobenzenesulphonic acid & p-cyanonitrobenzenesulphonic acid
d. m-cyanonitrobenzenesulphonic acid
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Consider the buffer system of hydrofluoric acid, HF, and its salt, NaF. HF(aq)+H2O(l)?H3O+(aq)+F?(aq) 1) The purpose of this buffer system is to: a) maintain [HF] b) maintain [F?] c) maintain pH 2) If OH? is added, it is neutralized by: a) the salt b) H2O c) H3O+
Buffer is a solution used to stabilize the pH (acidity) of a liquid.
A buffer system in chemistry is a type of solution that is able to resist changes in its pH when small amounts of an acidic or basic substance is added to it.
Many chemical reactions are carried out at a constant pH. In nature, there are many systems that use buffering for pH regulation
According to this question, a buffer system of hydrofluoric acid, HF, and its salt is given. The purpose of the buffer system is to stabilise the pH of the hydrofluoric acid solution.
Also, hydroxide ion (OH) can be added to the solution to neutralise the acid content of the solution as characterized by the presence of hydronium ions (H₃O⁺).
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Compare the electronic configuration of Helium, Neon and Argon and establish what is their characteristic in common, And its relationship with the fact that they do not react with other elements when exchanging electro
The electronic configuration of
Helium is - 1s2,
Neon is [He]2s²2p⁶
Argon is 1s²2s²2p⁶ or Ne 3s² 3p⁶
The common characteristic is that their outermost shells are filled making them noble gases.
What is electronic configuration?We can define the electronic configuration as the distribution of electrons of an atom or molecule in molecular orbitals.
Helium has 2 electrons in its atomic number is 2
Neon has 2,8 electrons in its shell atomic number 10.
Argon has 2,8,8 electrons in its shell and atomic number 18 Argon electron configuration will be 1s²2s²2p6 It is called a noble gas.
They do not react with other elements because their electronic shells are filled completing their octet configuration, and are stable and inert. They are called noble or inert gases.
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. calculate the ground state ionization energy (in kj/mol) and the wavelength (in nm) required for b4
The wavelength of radiation required to ionize b4 is therefore equal to 4.51 kj/mol / 10.8 eV, or 0.42 nm.
What is radiation?
Based on the energy of a radiated particles, radiation is frequently divided into ionising and non-ionizing categories. More than 10 eV is carried by ionising radiation, which is sufficient to ionise atoms as well as molecules and rupture chemical bonds. Due to the significant differences in how harmful these substances are to living things, this distinction is crucial. Radioactive substances that emit radiation in the form of helium nuclei, electrons as well as positrons, or photons are frequently sources of ionising radiation.
The ground state ionization energy of b4 is the energy required to remove an electron from the atom in its ground state. This energy is usually expressed in kilojoules per mole (kj/mol) and is equal to the amount of energy required to ionize one mole of b4 atoms.
The wavelength (λ) of radiation required to ionize b4 is the energy of the photon of radiation divided by the ground state ionization energy of b4. This wavelength is usually expressed in nanometers (nm).
The ground state ionization energy of b4 is 10.8 eV, which is equal to 4.51 kj/mol. The wavelength of radiation required to ionize b4 is therefore equal to 4.51 kj/mol / 10.8 eV, or 0.42 nm.
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Produces pyruvate. The multienzyme complex catalyzes the oxidative of pyruvate to yield carbon dioxide and acetyl coa. The overall equation for the reaction is acetyl coa is the main form in which carbon compounds enter the.
Pyruvate is produced by the reaction of a glycolysis. The multienzyme complex catalyzes the oxidative of pyruvate to yield carbon dioxide and acetyl coa. Its reaction is given as
Pyruvate+CoA+NAD⁺→acetyl CoA+NADH+H⁺+CO₂
Acetyl CoA→Citric acid cycle
Glycolysis process is defined as the conversion of a glucose(C₆H₁₂O₆) into the pyruvate(CH₃COCO₂H). In the glycolysis reaction, high energy ATP molecules and reduced nicotinamide adenine dinucleotide is created. The series of ten enzyme-catalyzed process makes up glycolysis.
One of the metabolic route which does not require is glycolysis(In anaerobic conditon, pyruvate is converted to lactic acid). It is occurred in various species, which tells us that it is old metabolic route.
Therefore, the glycolysis reaction produces pyruvate and its complete reaction is
Pyruvate+CoA+NAD⁺→acetyl CoA+NADH+H⁺+CO₂
Acetyl CoA→Citric acid cycle
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suppose 7.26 g of ammonium chloride is dissolved in 150. ml of a 0.50 mm aqueous solution of potassium carbonate.
Mass of ammonium chloride (NH4Cl) = 11.4 grams
Volume of 0.3 M aqueous solution of potassium carbonate (K2CO3) = 250 mL = 0.250L
Step 2: The balanced equation
2NH4Cl + K2CO3 → 2KCl + (NH4)2CO3
Step 3: Calculate moles of (NH4)Cl
moles (NH4)Cl = 11.4 grams /53.49 g/mol
Moles (NH4)Cl = 0.213 moles
Step 4: Calculate moles of K2CO3
Moles K2CO3 = Molarity * Volume
Moles K2CO3 = 0.3M * 0.250 L = 0.075 moles
Step 5: Calculate moles (NH4)Cl at the equilibrium
For 2 moles (NH4)Cl consumed, we need 1 mole of K2CO3 to produce 2 KCl and 1 mole of (NH4)2CO3
(NH4)2CO3l will dissolve in 2NH4+ + CO32-
Moles (NH4)2Cl = 0.213 moles - 2*0.075 = 0.063 moles
Moles NH4+ = moles (NH4)Cl = 0.063 moles
Step 6: Calculate Molarity of NH4+
Molarity = Moles / volume
Molarity of NH4+ = 0.063 moles / 0.250 L
Molarity of NH4+ = 0.252 M
Therefore, the molarity of the final ammonium cation is 0.252M
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Insoluble sulfide compounds are generally black in color. which of the following combinations could yield a black precipitate?
a.Na2S(aq)+KCl(aq)
b.Li2S(aq)+Pb(NO3)2(aq)
c.Pb(CIO3)2(aq)+NaNO3(aq)
d.AgNO3(aq)+KCl(aq)
e.K2S(aq)+Sn(NO3)4(aq)
Answer:
the answer for the question is B and E
an ideal otto cycle with argon as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 540 and 2350 r. account for the variation of specific heats with temperature. the properties of argon are cp
The specific heat of gases can be taken roughly as a constant for differences in the order of 100⁰ C from ambient. Variation is crucial and cannot be disregarded for temperatures of more than, let's say 500 ⁰C or 1000⁰C.
The ideal gas constant is the difference between cp and cv for low pressures (the ideal gas).The classical statistical physics principles for ideal non-interacting gases are found in any university physics primer.The demonstration that pV/T = constant is typically included in texts on macroscopic thermodynamics suggests that while temperature changes depend on specific heats, the opposite is also true. Real gas behavior requires a more complex explanation.As a result, we employ two techniques to determine the specific heat of gases: at constant volume and constant pressure. The value of the heat capacity at constant pressure is always greater than the value of the heat capacity at constant volume because the former also takes into account the value of the heat energy required to expand the substance against the constant pressure as its temperature rises.To learn about Real gas
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h3no lewis structure
Answer:
It is attached below.
Explanation:
The Lewis structure for H₃NO, also known as ammonia oxide or nitroxyl is given in the image.
Count the total number of valence electrons:
Hydrogen (H) has 1 valence electron.
Nitrogen (N) has 5 valence electrons.
Oxygen (O) has 6 valence electrons.
Total valence electrons = (3 × 1) + 5 + 6 = 14
Determine the central atom:
In this case, nitrogen (N) is the central atom, as it is less electronegative than oxygen (O) and hydrogen (H).
Connect the atoms with single bonds:
Place a single bond (represented by a line) between nitrogen (N) and each hydrogen (H). This accounts for 3 electrons.
Distribute the remaining electrons:
Place the remaining 11 electrons as lone pairs around the atoms to satisfy the octet rule. In this case, nitrogen (N) will have a lone pair, and oxygen (O) will have a lone pair.
Each line represents a single bond, and the lone pairs are represented by pairs of dots or dashes. The hydrogen atoms are bonded to the nitrogen atom, and the oxygen atom has a lone pair.
Hence, the Lewis structure is in the image.
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The ideal gas law is represented by pv=nrt . as volume is held constant and the temperature increases, how would the pressure be expected to change?
If in a gas the volume is held constant and the temperature increases, pressure exerted by the gas also increases.
Ideal gas law
The gas law which relates the macroscopic properties of ideal gases is known as ideal gas law. A gas is known as an ideal gas when its particles (a) do not attract or repel one another and (b) take up no space (have no volume). The ideal gas law equation is given as the following,
(PV = nRT)
Where,
P is pressure
V is volume
R is the universal gas constant
T is the temperature and
n is the number of moles
As we can see from the equation that T is directly proportional to P so when V is kept constant and T increases P also increases.
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Use MO diagrams to place B2+, B2, and B2- in order of (a) decreasing bond energy; (b) decreasing bond length.
We use the MO diagram for a homonuclear diatomic species (since C and N are neighbours, we treat them as the "same").
The first two electrons contribute to bonding. The next two are anti-bonding.
The next six contribute to bonding, and the following six are anti-bonding.
So, if we start with CN+, which has 4+5-1 (8) valence electrons, we note that the first two electrons contribute to bonding, while the next two cancel this out; the next four contribute to bonding, so the bond order is 4/2 = 2.
If we add one more electron to get CN, there are now 5 bonding electrons, giving bond order 5/2=2.5.
Adding one more to give CN- would give the bond order 6/2 = 3. (If we added more electrons, each one would lower the bond order.)
Given a series of molecules with identical skeletal structures, the one with the highest bond order has the highest bond energy:
CN+ < CN < CN-
Lewis structures will verify that CN- has a triple bond, but they do not work particularly well for CN+ and CN.
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How Many Carbonyl Groups Are Generated Upon Treatment Of The Molecule Below With Ozone, Followed By Zinc Metal And Water? A) 1 B) 2 C) 3 E) 8
The answer will be E if the query is correct. Following the treatment of the molecule below with ozone, zinc metal, and water, eight carbonyl groups are produced.
Exactly what is a carbonyl group?
A double bond connecting a carbonyl carbon atom and a carbonyl oxygen atom makes up a carbonyl group. Two of the six valence electrons that the carbonyl oxygen atom has are shared with the carbonyl carbon atom. Two sets of electron lone pairs make up the four valence electrons that are still present.
How many different kinds of carbonyl groups exist?
Aldehydes, ketones, carboxylic acids, acid chlorides, acid anhydrides, esters, lactones, amides, and lactams are examples of compounds that include carbonyl groups..
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item 3 select the representation(s) for the solution that results when dimethyl ether is dissolved in water
When dimethyl ether is dissolved in water results in,
CH₃OCH₃(aq)(g) + H2O(l) ⇌ CH₃OCH₃(aq)
What is Dimethyl ether?
Dimethyl ether (also known as DME) is a colorless, flammable gas with a faint, ether-like odor. It is the simplest ether, a derivative of methane, and is a promising alternative fuel for diesel engines. It is produced from the reaction of methanol and hydrogen or by steam reforming of natural gas.
What are Ethers?
Ethers are organic compounds containing an oxygen atom connected to two alkyl or aryl groups. Generally, ethers are colorless and have low boiling points, making them volatile. Ethers are widely used in the production of pharmaceuticals, fragrances, and other chemicals.
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how might a natural disaster such as a forest fire affect the elements of the hydrosphere
Answer:
A fire could cause an increase in evaporation of water from surface water near the fire.
Explanation:
Answer:
Explanation:
Wildfires can compromise water quality both during active burning and for months and years after the fire has been extinguished. Burned watersheds are prone to increased flooding and erosion, which can negatively affect water-supply reservoirs, water quality, and drinking-water treatment processes.
Wildfires can have immediate and long term effects on rivers, lakes, and streams. After burning vegetation, the ground's soil becomes hydrophobic and is unable to absorb any water. This creates what is known as stormwater runoff. Stormwater runoff is rainflow that travels over the surface of the ground.
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a sample of polystyrene, which has a specific heat capacity of , is put into a calorimeter (see sketch at right) that contains of water. the polystyrene sample starts off at and the temperature of the water starts off at . when the temperature of the water stops changing it's . the pressure remains constant at .
The mass of the polystyrene sample is 57.3 grams.
Styrofoam cups help insulate the reaction mixture and slow heat loss from the sides and bottom. Of course, heat is lost through the surface of the liquid mixture, but this can be reduced by using a styrofoam lid with a hole for the thermometer.
The Coffee Mug Calorimeter is essentially a polystyrene mug with a lid. A beaker is partially filled with a known amount of water and a thermometer is inserted through the lid of the beaker so that the bulb is submerged. A coffee cup calorimeter is a convenient and simple device that can be used to measure the temperature change that accompanies a reaction.
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A substance has a half-life of 2. 045 minutes. If the initial amount of the substance was 132. 8 grams, how many half-lives will have passed before the substance decays to 8. 3 grams? what is the total time of decay?.
The total time of decay is 8.18 min.
The half life is the time to takes a substance to decay. so, we half to find out the number of half lives that have passed for initial amount of 132.8 g.
number of half -lives amount of substances in g
0 132.8
1 66.4
2 33.2
3 16.6
4 8.3
so. it will take 4 half -lives for the substance to decay to 8.3 g.
the total time decay = 4 × 2.045 = 8.18 min.
Thus, A substance has a half-life of 2. 045 minutes. If the initial amount of the substance was 132. 8 grams, half - life will have passed before the substance decays to 8. 3 grams. the total time of decay is 8.18 min.
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How many electrons does a Br- ion have?
Answer:
36 electrons
Explanation:
Produces pyruvate. The multienzyme complex catalyzes the oxidative of pyruvate to yield carbon dioxide and acetyl coa. The overall equation for the reaction is acetyl coa is the main form in which carbon compounds enter the.
The Glycolysis produces pyruvate.
What is pyruvate?
Pyruvate is a three-carbon molecule which is the end product of glycolysis, the first step in the breakdown of glucose for energy. It is also the starting point for the Krebs cycle, the second stage of cellular respiration. Pyruvate is formed from the cleavage of the six-carbon sugar molecule, glucose, and is then further oxidized to form acetyl-CoA and enter the Krebs cycle. The enzymes responsible for pyruvate production are known as pyruvate kinases and are found in most eukaryotic cells. Pyruvate is an important molecule in the production of energy within the cell, as it acts as both a source of energy and a precursor to other metabolic pathways. Additionally, pyruvate is involved in the synthesis of fatty acids, amino acids, and other biomolecules. Pyruvate is also used in the fermentation process to produce lactic acid and ethanol.
The pyruvate dehydrogenase (PDH) enzyme is part of the multienzyme PDC, which catalyzes the physiologically irreversible decarboxylation of pyruvate to acetyl-CoA and is often referred to as a 'gatekeeper' in the oxidation of carbohydrate.
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hi
i need help with this
The dissociation equations are shown as;
a) [tex]HCl ------ > H^+ + Cl^-[/tex]
b) [tex]H C_{2} H_{3}O_{2} ---- > C_{2} H_{3}O_{2} ^- +H^+[/tex]
C) [tex]NH_{4} ----- > NH_{3} + H^+[/tex]
D) [tex]C_{6} H_{5} NH_{3} ^+ ------- > C_{6} H_{5} NH_{2} + H^+[/tex]
E) [tex][Al(H_{2} O)_6}] ^{3+} ------ > Al^{3+}[/tex]
What is dissociation?The term dissociation has to do with the procedure by which a substance can be broken up into its components. The components of a substance are those that have to come together so as to form the compound.
When the compound is to be broken up, the components that came together to make up the compound can broken up and then we have the original compounds tat we have at the start of the reaction. In this case, the decomposition equations have been shown with the exclusion of water.
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Which of the following is a
possible way to describe the elemental
oxygen component in the reaction
below?
S8 (s) + 1202(g) → 8SO3(g)
24 L O2
12 g O2
12 moles O2
24 atoms O2
12 moles O2 is a possible way to describe the elemental oxygen component in the reaction.
Define elemental oxygen form?
At normal temperatures and pressures, elemental oxygen is present as a gas, most frequently in the form of O2. This crucial ingredient, which is a crucial part of cellular respiration, is required for life on this planet.
This oxidation-reduction (redox) reaction is taking place:
8 S - 48 e- → 8 S (oxidation)
24 O + 48 e- → 24 O- (reduction)
O2 is an oxidizing agent, whereas S8 is a reducing agent.
Because each substance contains a huge number of atoms and molecules, we use the mole (mol) to express the amount of substances in chemistry. For the researcher who discovered how many atoms there are in 12 grams of carbon, the value provided, 6.022 x 1023 is known as Avogadro's number.
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