Answers
Answer:
In the reaction between p-aminophenol and acetic anhydride to form acetaminophen, 4.5 ml of water were added. This was done to recover the product out the container. Water was used as a means of carrying out the product out the container. However, it should be noted that we would want a small amount to be added in order to avoid the product dissolving onto it.
Explanation:
Related Questions
which compound is an electrolyte ? 1) butene 2) propane
Answers
Answer:
1.)
Explanation:
Assume that 8.5 L of iodine gas (I2) are produced at 0.75 atm and 295 K according to the following balanced equation: ___ KI (aq) + ___ Cl2 (g)→___ KCl (aq) + ___ I2 (g)a. How many grams of KI were used?
Answers
answer and explanation
from the reaction equation
2KI + Cl₂ > 2KCl + I₂
we are given the pressure, volume and Temperature of the reaction. therefore we can used the ideal gas equation to determine the numner of mols of I₂ that formed
PV =nRT
n = PV/RT
= (0.75x 8.5)/(0.0821 x 295)
= 0.25 mols of I₂
we can see that the mole ratio between KI and I₂ is 2:1
therefore the number of mols of KI that must have reacted are
2/1 x 0.25 = 0.5 mols of KI
to find the mass we simply use
mass = mols x Molar mass
= 0.5 mols x 166.0g/mol
= 83 grams were used
Which portion of a molecule of F2O has partial positive charge?
Question 3 options:
A)
The F atoms
B)
The central O atom
C)
The partial charge on each atom is zero
D)
The partial charge on each atom is negative
Answers
The partial charges on each fluorine atom are negative. Option B) The central O atom is the correct answer. Option B
The partial charges in a molecule are determined by the electronegativity values of the atoms involved. Electronegativity is the ability of an atom to attract electrons towards itself in a chemical bond. In the case of \(F_2O\), fluorine (F) is more electronegative than oxygen.
Fluorine is the most electronegative element on the periodic table, meaning it has a high ability to attract electrons. Oxygen is also relatively electronegative but less so than fluorine. When fluorine atoms bond with oxygen, the shared electrons will be pulled more towards the fluorine atoms, creating a polar covalent bond.
In \(F_2O\), each fluorine atom will pull the shared electrons towards itself, resulting in a higher electron density around the fluorine atoms. This creates a region of partial negative charge around the fluorine atoms.
Conversely, the oxygen atom will have a region of lower electron density and, therefore, a partial positive charge. This is because the shared electrons spend more time around the fluorine atoms due to their higher electronegativity.
Option B
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which of the following statements best describes energy? view available hint(s)for part a which of the following statements best describes energy? energy is the food we eat. energy can be created and destroyed. energy is the capacity to change the position, physical composition, or temperature of matter. entropy is another name for energy.
Answers
It is true that energy is the capacity to change the position, physical composition or temperature of matter.
In physics, energy is the ability to perform work. It may exist in different forms, including potential, kinetic, thermal, electrical, chemical, radioactive, and more. In addition, energy is transferred from one body to another through effort and heat. Energy is always identified in accordance with its nature after being transferred. Thus, heat transfer may result in the creation of thermal energy, whereas work performed may result in the generation of mechanical energy. Motion is a property of all types of energy.
It is only possible to modify the form of energy; it cannot be created or destroyed. The first law of thermodynamics or the concept of energy conservation is what is meant by this.
Joules are the unit of measurement for energy in the International System of Units (SI). The work carried out by a one-newton force operating over a one-meter distance is equivalent to one joule.
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How do you Convert 312 kelvin too 100 Fahrenheit?
Answers
ºF = 1.8 x (K - 273) + 32.
So first you’d subtract whatever kelvin you had and 273 so:
312-273=39
and then you’d take that answer and multiple by 1.8
39x1.8=70.2
and then you add 32 to your answer
70.2+32= 102.2 fahrenheit
Iodine shines like metals but is not metal what is its basis
Answers
Answer:
Iodine is a non-metal, but it is lustrous (lustrous is the property of metal) in nature.
For reactions in the gas phase, an equilibrium constant may be written in terms of molarity (Kc) or in terms of partial pressures (Kp).
The value of Kc for the reaction shown below is equal to 2.9×10⁻⁴ at 298K.
2 NOBr(g) ⇄ 2NO(g) + Br₂(g)
What is the value for Kp at 298K for the reaction represented by the equation shown below? The value for the gas constant, R, is 0.08206 L . atm/mol. K.
NOBr(g) ⇄ NO}(g) + 1/2 Br₂(g)
Answers
The equilibrium constant of the reaction on the basis of concentration is 1.2 * 10^-7.
What is the Kc?We know that the equilibrium constant has to do with the value that shows the extent to which the reactants can be converted into products in the reaction as shown. We have been given in the question, the equilibrium constant that is based on the partial pressures of the reactants.
We then have the formula that we have to use to solve the problem as;
Kp = Kc(RT)^Δn
Kp = Equilibrium constant based on partial pressure
Kc = Equilibrium constant based on concentration
R = Gas constant
T = temperature
n = Number of moles
Thus we have;
Kc = Kp/(RT)^Δn
Kc = 2.9×10⁻⁴/(8.314 * 298)^(3-2)
Kc = 2.9×10⁻⁴ /2477.57
Kc = 1.2 * 10^-7
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Calculate the sublimation pressure of the solid at the melting point of 400.00 K assuming that the enthalpy of sublimation is not a function of temperature.
Answers
This question is incomplete, the complete question is;
Tonksite is a solid at 300.00K. At 300.00 K its enthalpy of sublimation is 66.00 kJ/mol. The sublimation pressure at 300.00 K is 5.00 × 10⁻⁴ atm
Calculate the sublimation pressure of the solid at the melting point of 400.00 K assuming that the enthalpy of sublimation is not a function of temperature.
Answer: the sublimation pressure of the solid at the melting point is 0.3727 atm
Explanation:
Given that;
T1 = 300 K
T2 = 400 K
H_sub = 66 kJ/mol = 66000 J/mol
P1 = 5.00 × 10⁻⁴ atm
p2 = ?
now using the expression
log( p2 / 5.00 × 10⁻⁴ ) = (H_sub / R × 2.303 ) (( T2 - T1) / T1T2)
now we substitute of given values into the expression
log(p2/p1) = (66000 / 8.314 × 2.303 ) (( 400 - 300) / 300 × 400 )
p2 = 0.3727 atm
therefore the sublimation pressure of the solid at the melting point is 0.3727 atm
ΚΕ:
m.22
2
What is the kinetic energy of 10kg dog running with a velocity of 12m/s?
Answers
Answer:
The answer is
720 JoulesExplanation:
The kinetic energy of a body can be found by using the formula
\(K.E = \frac{1}{2} {mv}^{2} \)where
m is the mass
v is the velocity / speed
From the question
mass = 10 kg
velocity = 12 m/s
Substitute the values into the above formula and solve
That's
\(KE = \frac{1}{2} \times 10 \times {12}^{2} \\ = 5 \times 144 \: \: \)We have the final answer as
720 JoulesHope this helps you
amino acid addition to a growing chain happens at the [ select ] and [ select ] (consider only the formation of a peptide bond and not other steps such as translocation)
1. for the first blank, is it a C terminal / N terminal?
2. Do they require GTP/ ATP/ or none of them?
Answers
Amino acid addition to a growing chain happens at the C terminal and ATP is required.
Proteins are made up of substances called amino acids. Proteins and amino acids are the components of life. Amino acids are the byproducts of the digestion or breakdown of proteins. Amino acids are used by the human body to create proteins that benefit the organism. Two ATP molecules are needed for amino acid activation, two more for peptide bond formation and ribosome translation, as well as an additional ATP molecule or so for error correction and the synthesis of sequences that are lost during protein maturation, in order to add an amino acid to a growing peptide chain.
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CH3-CH2-CH=CH-CH3 ( MARKOVIAN'S RULE AND ANTI MARKOVIAN'S RULE)
Answers
Answer:
Explanation:
CH3-CH2-CH=CH-CH3 is a molecule with a long carbon chain containing a double bond between the third and fourth carbon atoms. In this molecule, the first three carbon atoms (CH3-CH2-CH) form a substructure known as a propyl group, while the last two carbon atoms (CH=CH-CH3) form a substructure known as an allyl group.
When applying Markovnikov's rule to this molecule, the double bond is treated as a functional group that can react with other molecules. In this case, the double bond will react with a molecule of hydrogen to form a new carbon-hydrogen bond, with the hydrogen atom attaching to the carbon atom that already has the most hydrogens. In this molecule, the carbon atom in the propyl group has three hydrogens, while the carbon atom in the allyl group has only two hydrogens. Therefore, according to Markovnikov's rule, the hydrogen atom will react with the carbon atom in the allyl group, forming a new molecule with the following structure: CH3-CH2-CH-CH2-CH3.
Alternatively, if the reaction follows anti-Markovnikov's rule, the hydrogen atom will react with the carbon atom in the propyl group, forming a new molecule with the following structure: CH3-CH2-CH2-CH=CH3. This is the opposite of what would happen under Markovnikov's rule, as the hydrogen atom attaches to the carbon atom with the fewest hydrogens instead of the most.
Overall, Markovnikov's rule and anti-Markovnikov's rule describe how double bonds in molecules can react with other molecules to form new bonds. These rules help predict the outcome of chemical reactions involving double bonds, and are important tools in organic chemistry.
Anyone want have a baby?
This would be an experiment (;
If u know what I mean
Answers
Answer:
An experiment that could go extremely wrong or just well.
Answer:
Explanation:
Bro huh??? you can't be asking that on brainly bro ;-;
I need help on number 1 please
Answers
Answer:
Atom 1 and Atom 4 of the elements below are in the same group in the periodic table.
How many aromatic rings in morphine
Answers
Answer:
6
Explanation:
It has 6 bonds.
What type of bond is present between two atoms of zinc in a nickel
Answers
Answer:
Pure covalent
Explanation:
To know the type of bond between two atoms you must find the electronegativity difference of them:
If electronegativity difference is:
< 0.4: Pure covalent.
Between 0.4 and 1.8: Polar covalent.
> 1.8: Ionic.
The electronegativity of Zn is 1.65 and Ni is 1.91. Electronegativity difference is:
1.91 - 1.65 = 0.26
That means the type of bond is:
Pure covalentHydrogen sulfide gas is a flammable gas. The gas burns with
a blue flame according to the following equation:
2 H₂S (g) + 3 O2 (g) => 2 SO2 (g) + 2 H₂O(g)
5.00 L of hydrogen sulfide gas and 7.00 L of oxygen were
allowed to react.
Calculate the theoretical yield, in L (liters), of sulfur dioxide.
All the gases were at the same temperature and pressure.
Answers
Answer:
4.67 liters of SO2 with sig figs
Explanation:
To do this reaction, we first must find the limiting agent.
in this problem, 5 liters of H2S are reacted with 7 liters of O2, and each two moles of H2S corresponds to 3 moles of O2. Assuming ideal behavior, 1 liter of H2S has the same number of moles as 1 liter of O2 has. So, 2 liters of H2S react with 3 liters of O2. To find the limiting reagent, focus on one reagent and calculate how much of the other reagents would be needed to fully consume that one reagent.
Focus on H2S:
5 liters of H2S would require 7.5 liters of O2 (since each 2 liters of H2S requires 3 liters of O2)
Focus on O2:
7 liters of O2 would require 14/3, or 4.666... liters of H2S.
Since we don't have 7.5 liters of O2 (we only have 7 liters) to react with all 5 liters of H2S, we would say that O2 is the limiting reagent, and that we have 7 liters of it.
Next, figure out how much product can be produced per mole of that limiting reagent. 3 moles of O2 and 2 moles of H2S turns into 2 moles of SO2 and 2 moles of H2O. Thus, the ratio of O2 to SO2 is 3:2
We have 7 liters of O2, and since the ratio of O2 to SO2 is 3:2, we can set up the equation:
7:x = 3:2 where x is the number of liters of SO2
cross multiply (or solve with another method) to get:
x = 14/3, or 4.666... liters of SO2
A student made a sketch of a potential energy diagram to represent an endothermic reaction.
A curve line graph is shown. The y axis of the graph has the title Potential Energy and kJ written in parenthesis. The x axis of the graph has the title Reaction Pathway. The curve begins at a higher level and ends at a slightly lower level. A broken horizontal line is shown from a point labelled X on the y axis to the point where the curve begins. Another broken horizontal line is shown from a point labeled Y on the y axis to the point where the curve ends.
Explain, using complete sentences, why the diagram made by the student is correct or incorrect. Be sure to also explain what the values of X and Y represent.
Answers
Based on the description of the potential energy diagram provided, the diagram made by the student appears to be correct.
The potential energy diagram represents the energy changes that occur during a chemical reaction. In an endothermic reaction, the products have higher potential energy than the reactants, meaning energy is absorbed from the surroundings.
The curve line on the graph indicates the energy changes throughout the reaction pathway. It starts at a higher level, representing the initial potential energy of the reactants. As the reaction progresses, the potential energy decreases, indicating the formation of products with lower potential energy.
The broken horizontal line from point X on the y-axis to the point where the curve begins represents the activation energy (Ea) of the reaction. Activation energy is the energy barrier that must be overcome for the reactants to convert into products.
Point X on the y-axis indicates the potential energy of the reactants at the start of the reaction, and the broken line shows the energy required to initiate the reaction.
The broken horizontal line from point Y on the y-axis to the point where the curve ends represents the potential energy of the products. Point Y represents the potential energy of the products at the end of the reaction.
Overall, the student's diagram correctly represents an endothermic reaction, showing the potential energy changes, the activation energy, and the final potential energy of the products. The curve line starts at a higher level (representing the higher potential energy of the reactants) and ends at a slightly lower level (representing the lower potential energy of the products).
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Which of the following statements explain how creativity leads to new investigations? Check all of the boxes that apply.
Creativity lets scientists use their imagination to invent results.
Creativity leads scientists to design new methods to test their hypotheses.
Creativity allows scientists to investigate untestable hypotheses.
Creativity permits scientists to think of new questions to investigate.
Answers
Answer:
Creativity leads scientists to design new methods to test their hypotheses.
Creativity permits scientists to think of new questions to investigate.
Explanation:
A scientist must be very creative and must be a critical thinker.
Creativity is the ability of someone to use imaginations to solve a problem.
It is the art of being inventive. To the scientific world, creativity is very essential. It helps scientists to design new methods to validate their hypothesis. It also helps to bring up new questions that might be investigated.Answer:
B and D
Explanation:
The half-life of Po-210 is 140 days. If the initial mass of the sample is 5 kg, how much will remain after 280 days.
Answers
The half-life of Po-210 is 140 days. If the initial mass of the sample is 5 kg, 3.5g will remain after 280 days.
What is chemical kinetics?Chemical kinetics is a subfield of physical chemistry that studies the speeds of chemical processes. The rate of the reaction may be used to classify it as quick, moderate, or sluggish. Reaction mechanism also enables us to study the effects of temperature and catalyst on reaction rate and rate constant. It informs us about reaction processes and enables us to apply particular rate constants to certain mechanistic stages.
The rate law for first order kinetics is
K=(2.303/T)×log(a/a-x)
half life=0.693/K
Where
k - rate constant
t - time passed by the sample
a - initial amount of the reactant
a-x - amount left after the decay process
K=0.693/half life
K=0.693/140
=0.086
0.086=(2.303/ 280)×log( 5 /a-x)
0.086=0.07×log( 136/a-x)
1.22=log( 136/a-x)
136/a-x=16.5
a-x=3.5g
Therefore, 3.5g will be left after 280 days.
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If 8.0 g of sulfur dioxide came in contact with a cloud containing 2.2 g of oxygen, indicate the
Limiting Reactant and calculate the theoretical yield (in grams) of sulfur trioxide produced.
Answers
Answer:
Limiting reactant= SO₂, Theoretical yield = 9.6g SO₃
Explanation:
The first step is is to find the limiting reactant; you do this using stoichiometry.
The reactant that produces the smallest amount of sulfur trioxide SO₃, is the limiting reactant.
In this problem, SO₂ is the limiting reactant.
Now to find the theoretical yield we will use the smallest value of SO₃.
I have uploaded a picture to better illustrate the problem and hope it helps.
How many protons, neutrons, and electrons does S^2- have
Answers
Answer:
The protons and electrons in each element are equal. The sulfur has 16 electrons and 16 protons. But the ionic atom's electron quantity changes depending on how many it has gained. 'S2-' has gained 2 electrons, which means it has now 18 electrons and 16 protons. 16 neutrons
Explanation:
1 Given that the density of CO₂ at the temperatures we used is 1.25 g/L, calculate the theoretical
and actual yield (based on the amount of sodium acetate produced!) for CO2, in liters, for the
experiment.
нсо
2 How many grams of sodium hydrogen carbonate would be necessary to produce 425 mL of CO₂?.
Use the density of CO2 from
Answers
1.596 grams of sodium hydrogen carbonate would be necessary to produce 425 mL of \(CO_{2}\) at STP.
To calculate the amount of sodium hydrogen carbonate needed to produce 425 mL of \(CO_{2}\), you can use the following steps:
Convert the volume of \(CO_{2}\) to moles using the molar volume at STP:
425 mL ÷ 1000 mL/L = 0.425 L \(CO_{2}\)
0.425 L \(CO_{2}\) ÷ 22.4 L/mol = 0.019 moles \(CO_{2}\)
Use the balanced chemical equation to determine the stoichiometry between sodium acetate and carbon di oxide:
\(NaC_{2} H_{3} O_{2}\) \(+ H_{2} O + CO_{2}\) → \(Na HC_{3} O_{2}\)\(+ CH_{3} COOH\)
For every 1 mole of sodium acetate, 1 mole of CO2 is produced. Therefore,
0.019 moles CO2 = 0.019 moles \(NaC_{2} H_{3} O_{2}\)
Calculate the mass of sodium hydrogen carbonate needed using its molar mass:
0.019 moles \(NaC_{2} H_{3} O_{2}\) × 84.01 g/mol = 1.596 g \(Na HC_{3} O_{2}\)
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how does the earth compare in the orbital speed to the other planets?
Answers
You want to make a photo album for your friend. In three to five sentences, describe at least one advantage and one disadvantage of choosing a digital photo album rather than a physical one. Analyze a potential solution to the disadvantage
Answers
Because digital data can be lost so easily, Atomic Theory it is essential for photographers to have at least 1 backup of each shot they intend to save for the long term.
What are digital photography's drawbacks?Higher Initial Cost: Compared to roll film cameras, greater, fully-loaded digital cameras can be a little more expensive. Battery Consumption: With digital cameras, the battery runs out more quickly. This necessitates having a few spare batteries on hand, especially while taking numerous photos.
How do you recognise probable remedies?The process of finding solutions is iterative: Start by formulating theories for potential solutions to your problem. Create a how map by structuring these hypotheses. Next, prior to performing the actual testing, choose which hypothesis you wish to test first.
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If MgCl2 (aq) has a molarity of 2.5 M, then the molarity of the Cl-1 ions is ____ M.
Answers
Answer:
molarity of Cl⁻ ions = 5.0 M
Explanation:
The molarity of a solution expresses the amount in moles of a solution present in a litre of solvent. Its unit is mol/L or mol/dm³ written as M.
MgCl₂ when dissolved to form an aqueous solution dissociates into positive and negative ions, Mg²⁺and Cl⁻ ions.
Equation of the dissociation of MgCl₂ in aqueous solution is given below:
MgCl₂(aq) -----> Mg²⁺(aq) + 2Cl⁻(aq)
1 mole of aqueous MgCl₂ produces 2 moles of chloride ions, Cl⁻
Molar concentration of MgCl₂(aq) = 2.5 M
Molarity of chloride ions = number of moles of Cl⁻ ions * molarity of MgCl₂
molarity of Cl⁻ ions = 2 * 2.5 M
molarity of Cl⁻ ions = 5.0 M
This chemical equation represents a chemical reaction.
HCl + NaOH - NaCl + H20
Which two chemicals are products in the chemical reaction?
A. NaOH
B. H20
C. NaCl
D. HCI
Answers
Explanation:
products are Nacl + H20
Which of the following is a noble gas? O A. Hydrogen (H) O B. Oxygen (0) O C. Nitrogen (N) O D. Argon (AN)
Answers
Answer:
D. Argon
Explanation:
Helen knit a total of 175 centimeters of scarf over 35 nights. How many nights will Helen have to spend knitting in order to knit a total of 180 centimeters of scarf? Solve using unit rates.
Answers
Helen takes 35 nights to knit a total of 175 centimeters of scarf. Hence, she will take 36 nights to knit 180 centimeters of scarf.
What are length units?Length is a basic measurement in for an object which is basically taken in meters or centimeters. The basic unit of length in American standard is meters (m) and in CGS system it is centimeters.
It is given that, Helen knit a total of 175 centimeters of a scarf over 35 nights. Then, the length she knit in one nigh is calculated as:
175/35 = 5 cm.
Therefore, the number of nights required to complete 180 cm is :
180 /5 = 36
Thus, she will take 36 nights to knit a total of 180 cm of scarf.
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Step 6: Measure Pressure and Volume with the Book and 1 kg of Weight
Answers
Answer:
Picture:
Explanation:
Edge 2022
tom pays 5 cents per minute to use his cell phone. Write an expression for the cost in cents of using his cell phone for minutes.
Answers
Answer:5m
Explanation:Because in the question it say per minute so it would be 5 times m