Answers
Answer:
CH2=CH-CH3
Explanation:
One of the ways of preparing alkenes is by dehydration of alcohols using sulphuric acid. The sulphuric acid merely acts as a catalyst in the process.
It begins with the protonation of the -OH group. This is followed by loss of water molecule since water is a good leaving group.
Loss of a proton now completes the mechanism and regenerates the acid catalyst.
The mechanism of dehydration of 2-propanol as well as the product formed in the process is shown in the image attached to this answer.
Related Questions
If 2.12 Moles of bromine react with excess phosphorus; How many moles of phosphorus tribromide can be produced?
Round all answers to the hundredths place.
Answers
6 molls
As a result, if two moles of dinitrogen gas are specified, six moles of dihydrogen gas are needed.
Will the boiling point of water be higher or lower in the maintains, where the altitude is high, and the pressure is low ?
Answers
Is nitric acid a strong or weak acid. Explain your answer.
Answers
Answer:
There are only a few (7) strong acids, so many people choose to memorize them. All the other acids are weak. The strong acids are hydrochloric acid, nitric acid, sulfuric acid, hydrobromic acid, hydroiodic acid, perchloric acid, and chloric acid.Explanation:
그것은 당신의 교육에 도움이 되기를 바랍니다
How many moles are in 67.94 liters of O2?
I need this answered asap
Answers
Answer:
3.033
Explanation:
67.94/22.4= 3.033
I hope lol
What do we mean by basic MgO?
Answers
Answer:
Magnesium oxide is a simple basic oxide, because it contains oxide ions. It reacts with water to form magnesium hydroxide which is a base.
Answer:
magnesium oxide
Explanation:
this is how that would be read
Which statement describes the law of conservation of energy? A. All systems will exchange matter and energy with their surroundings. B. All systems can exchange energy, but not matter, with their surroundings. C. Energy cannot be created nor destroyed, but it changes from one form to another. D. Energy is destroyed in most chemical reactions when new products are formed.
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Answers
Answer:
C, energy cannot be created nor destroyed.
Explanation:
5. A company uses a substance that is a solid under normal conditions. This substance will be used in extreme conditions, which could make the substance’s molecules move faster and cause a phase change. How would this phase change occur, and how would the molecules of the substance be affected under these extreme conditions?
Energy would be transferred . . .
Answers
Answer:
The shift often happens when heat is applied or removed at a specific temperature
Explanation:
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How could the AX3 molecular structure (one central atom with three bonded atoms) be non-polar even with bond dipoles present?
options:
1. If there were no lone pairs on the central atom
2. If there were one lone pair on the central atom
3. If there were two lone pairs on the central atom
4. If there were three lone pairs on the central atom
Answers
The AX3 molecular structure (one central atom with three bonded atoms) can be non-polar even with bond dipoles present If there were no lone pairs on the central atom. Option 1 is correct.
The molecular structure or shape is a 3-D pattern showing the arrangement of atoms of a molecule.
The molecular structure of AX3 is said to be composed of a central atom connected and bounded to three atoms which are equally spaced at an angle of 120° towards one another. It has a shape of trigonal planar and its sp² hybridized that does not have any lone pair.
The polarity of a molecule or a compound has to do with the presence of lone pair in the central atom. Since AX3 has no lone pair of electrons in its central atom it is said to be non-polar.
Example of compounds that exhibit AX3 with no lone pair is: BF₃ and CO₃²⁻
Therefore, we can conclude that we've understood what is molecular structure and how to identify the molecular structures that are polar and non-polar in nature.
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what’s is the answer?
Answers
The energy of the photon of light can be obtained as 6.27 * 10^-20 J.
What is the energy of the photon?We know that a photon has to to do with a particular unit of light. We know that light can be said to be composed of very tiny corpuscles and these corpuscles of light is what we call the photon of the light.
We can be able to us the equation that is derived by Max Plank to be able to get the value of the energy of the photon of light. Now we know that a photon of light can have an energy that is able to be obtained by;
E = hf
h = Plank's constant
f = Frequency
Then;
E = 6.6 * 10^-34 Js * 9.5 * 10^13 Hz
= 6.27 * 10^-20 J
Thus as we can see from the parameters in the question, the energy of the photon is 6.27 * 10^-20 J.
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an element E forms a hydride EH3, which contains 90% of E by mass. what is the relative atomic mass ?
Answers
Answer:
27 g/mol of E
Explanation:
Note that percentage by mass= mass of each element present. So, since there is 90% of E, there is 90g of E present. By implication, there are 10g of H corresponding to 10%H. Note that there is 100g of EH3
1 moles of E corresponds to 90 g of E
Mole ratio of E: H= 1:3
Thus
Number of moles of H = 10g/ 1g/ mol = 10 moles of H
Since E contains 1/3 the number of moles of H
Number of moles of E = 1/3 × 10 = 3.33 moles of E
Molar mass of E= mass of E/ number of moles of E
Since mass of E = 90 g
Molar mass of E = 90g/3.33 moles
Molar mass of E = 27 g/mol
Why do you think Petri dishes contain sugar?
Answers
Answer:
sugar is mainly responsible for growth of yeast, but in BG11 medium there is no sugar
Explanation:
Although petri dishes do not contain sugar by themselves, the growth media used in these dishes can contain sugar to offer an energy source for the microorganisms being grown.
In laboratories, Petri plates are often used to cultivate and develop microorganisms such as bacteria, fungus, and other tiny creatures. Dishes are typically constructed of glass or clear plastic and have a flat, shallow, cylindrical shape with a cover. Petri plates do not contain sugar by definition; rather, they are utilised as containers for many types of growth media, including ones containing sugar.
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Consider the following half-reactions and their standard reduction potential values to answer the following questions.
Cu2+ (aq) + e- Cu+ (aq) E° = 0.15 V
Br2 (l) + 2e- 2Br- (aq) E° = 1.08 V
i) State which reaction occurs at the anode and which at the cathode. [2 marks]
ii) Write the overall cell reaction. [2 marks]
iii) Calculate the value of E°cell. [2 marks]
iv) Calculate the value ΔG° [2 marks]
v) What is the value of Kc at 25°C? [2 marks]
Answers
Answer:
Br2 (l) + 2e- ---------> 2Br- (aq) E° = 1.08 V cathode
Cu2+ (aq) + e- --------->Cu+ (aq) E° = 0.15 V anode
Explanation:
We have to first state the fact that the reaction having the most positive reduction potential occurs at the cathode in any spontaneous electrochemical cell. The half reaction with the less positive electrode potential usually occurs at the anode.
The overall reaction equation is;
2Cu2+ (aq) + Br2 (l) ----->2Cu+ (aq) + 2Br- (aq)
E°cell= E°cathode - E°anode
E°cathode= 1.08 V
E°anode= 0.15V
E°cell = 1.08-0.15 = 0.93 V
But
∆G°= -nFE°cell
n= 2, F=96500C, E°cell= 0.93V
∆G° = -(2× 96500× 0.93)
∆G= -179490 J
But;
∆G = -RTlnK
R=8.314 JK-1
T= 25+273= 298K
Kc= the unknown
∆G° = -179490 J
Substituting values and making lnK the subject of the formula
lnK= ∆G/-RT
lnK= -( -179490/8.314 × 298)
lnK= 72.45
K= e^72.45
K= 2.91×10^31
Starting with 0.3500 mol CO(g) and 0.05500 mol COCl2(g) in a 3.050 L flask at 668 K, how many moles of CI2(g) will be present at equilibrium?
CO(g) + Cl2(g)》COCl2(g)
Kc= 1.2 x 10^3 at 668 K
Answers
At equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.
1: Write the balanced chemical equation:
\(C_O\)(g) + \(Cl_2\)(g) ⟶ \(C_OCl_2\)(g)
2: Set up an ICE table to track the changes in moles of the substances involved in the reaction.
Initial:
\(C_O\)(g) = 0.3500 mol
\(Cl_2\)(g) = 0.05500 mol
\(C_OCl_2\)(g) = 0 mol
Change:
\(C_O\)(g) = -x
\(Cl_2\)(g) = -x
\(C_OCl_2\)(g) = +x
Equilibrium:
\(C_O\)(g) = 0.3500 - x mol
\(Cl_2\)(g) = 0.05500 - x mol
\(C_OCl_2\)(g) = x mol
3: Write the expression for the equilibrium constant (Kc) using the concentrations of the species involved:
Kc = [\(C_OCl_2\)(g)] / [\(C_O\)(g)] * [\(Cl_2\)(g)]
4: Substitute the given equilibrium constant (Kc) value into the expression:
1.2 x \(10^3\) = x / (0.3500 - x) * (0.05500 - x)
5: Solve the equation for x. Rearrange the equation to obtain a quadratic equation:
1.2 x \(10^3\) * (0.3500 - x) * (0.05500 - x) = x
6: Simplify and solve the quadratic equation. This can be done by multiplying out the terms, rearranging the equation to standard quadratic form, and then using the quadratic formula.
7: After solving the quadratic equation, you will find two possible values for x. However, since the number of moles cannot be negative, we discard the negative solution.
8: The positive value of x represents the number of moles of \(Cl_2\)(g) at equilibrium. Substitute the value of x into the expression for \(Cl_2\)(g):
\(Cl_2\)(g) = 0.05500 - x
9: Calculate the value of \(Cl_2\)(g) at equilibrium:
\(Cl_2\)(g) = 0.05500 - x
\(Cl_2\)(g) = 0.05500 - (positive value of x)
10: Calculate the final value of \(Cl_2\) (g) at equilibrium to get the answer.
Therefore, at equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.
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A physical change produces a new element, a chemical change results from breaking bonds between atoms. A physical change results in a new compound being formed; a chemical change results in the formation of a new element. A physical change results in a new compound being formed; a chemical change results in the formation of a new element. A physical change results in a new substance being formed, which is different than what results from a chemical change. A physical change results in a new substance being formed, which is different than what results from a chemical change. A physical change is a change from one state of matter to another; a chemical change results in the formation of a new substance.
Answers
A physical change is a change from one state of matter to another; a chemical change results in the formation of a new substance.
What is Physical and Chemical change ?Examples of physical changes include changes in the composition or size of materials. Physical changes include changes from one state to another, for as going from a solid to a liquid or a liquid to a gas. Some of the processes that result in physical changes are cutting, bending, dissolving, freezing, boiling, and melting.
Chemical changes are those in which one or more new compounds are created. A chemical reaction is another name for a chemical change. Examples include the burning of any substance and the corrosion of iron.Chemical synthesis, or, alternatively, chemical breakdown into two or more separate molecules, occurs when one material reacts with another to create a new substance. These processes are referred to as chemical reactions, and they are typically irreversible barring additional chemical reactions.Learn more about Physical and Chemical change here:
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biochem chapter 8 analyze the data and complete the following sentences. match the words in the left column to the appropriate blanks in the sentences on the right. make certain each sentence is complete before submitting your answer.
Examine experimental data
Consider the following experimental data that were obtained for two different enzymes, A and B, to determine their reaction rate or velocity under varied substrate concentrations, [S].
Table for Enzyme A Table for Enzyme R
(S)x 10-³. reaction rate. (S)x10-³. reaction rate
(mmol/L). (mmol/s). (mmol/L) (mmol/s). 1. 29. 2. 2.5
2. 45. 3. 3.9
5. 30. 6. 6.5
6. 20.8. 8. 8
7. 65. 12. 10
8. 80. 24. 13.5
9. 90. 36. 16
12. 112. 40. 16 For enzymes obeying the Michaelis-Menten equation, a graph that plots the reaction rate or velocity as a function of substrate concentration will be a hyperbolic curve. This curve can be
used to determine Vmax and KM, where Vmax is the maximum velocity of the reaction (maximum rate), and KM is the substrate concentration when the velocity is half its maximum.
8
shows no trend
decreases uniformly
40 × 10-³
a linear
8 × 10-³
x
Increases uniformly
a hyperbolic
A
no defined
40
B
16
Of the two enzymes studied, when plotting concentration versus reaction rate, enzyme A produces a
plot with
shape and enzyme B produces a plot with
shape.
The reaction rate of enzyme A
saturation point, and the reaction rate of enzyme
Given this data, enzyme
this plot, the estimated value of Vmax is
mmol/L.
as the concentration of substrate increases to its
over the same set of conditions.
obeys the Michaelis-Menten equation. Analyzing the shape of
mmol/s and KM is
Answers
Of the two enzymes studied, when plotting concentration versus reaction rate, enzyme A produces a hyperbolic plot and enzyme B produces a linear plot.
The reaction rate of enzyme A increases uniformly, reaches a saturation point, and the reaction rate of enzyme B decreases uniformly over the same set of conditions.
Given this data, enzyme A obeys the Michaelis-Menten equation. Analyzing the shape of this plot, the estimated value of Vmax is 112 mmol/s and KM is 8 × 10-³ mmol/L. For enzyme B, there is no defined saturation point and the reaction rate decreases uniformly.
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What amount of heat (in kJ) is required to convert 13.7 g of an unknown liquid (MM = 83.21 g/mol) at 19.2 °C to a gas at 93.5 °C? (specific heat capacity of liquid = 1.58 J/g･ °C; specific heat capacity of gas = 0.932 J/g･ °C; ∆Hvap = 22.5 kJ/mol; normal boiling point, Tb = 57.3 °C)
Answers
In terms of energy, when atoms chemically bond to form a stable compound:_____.
A. Energy is released.
B. Energy can either be released or consumed depending upon the bond formed.
C. Energy is transferred from one atom to another.
D. Energy is consumed.
Answers
Answer:
A. Energy is released
Explanation:
Energy is only released when chemical bonds are formed.
which of the statements about light is false?
a. light travels through space at a speed of 3.00 x 10^8m/s
b. light travels much faster than sound
c. a pack of light energy is called a photon
d. a characteristic feature of light the determined its color is its wavelength
e. all of the above statements are true
Answers
The false statement about light is:
e. all of the above statements are true.
Properties of lightThe speed of light in a vacuum is constant at approximately 3 00 x 10 8 m/s
light does travel much faster than sound which has a speed of around 343 meters per second
a photon is a packet of light energy and the energy of a photon is proportional to its frequency the wavelength of light is
a characteristic feature that determines its color therefore statements a b c and d are true
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Need help fast help help help. Help
Answers
Answer:
fjnjfzgnf
Explanation:
Answer:
it blank !
Explanation:
H2S(aq) + Ca(OH)2(aq)
Answers
Answer:
CaS + 2H2O is the balanced equation
PLEASE ANSWER QUICKLY!!
100 NaNO3
90
Solute per 100 g of H₂O (g)
0,80
NH,CI
70 KNO3
60
50
40
30
20
10
0
0 10 20 30 40 50 60 70 80 90 100
Temperature (°C)
KCIO3
60 g KNO3 has
been added to
100 g H₂O at
30 °C. What
type of solution
is this?
A. unsaturated
B. saturated
C. supersaturated
Answers
If 60 grams of the substance are added to 100 g of water, the solution can be categorized as supersaturated.
How saturated is this solution?The graph shows the number of grams that can be dissolved in 100 grams of water at different temperatures. In general, solubility increases with temperature.
According to the graph, at a temperature of 30°C, it is possible to dissolve a total of 48 to 49 grams of \(KNO_{3}\). This information implies that if we add 60 grams at this temperature not all the substance would be dissolved, and therefore the solution would be supersaturated.
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how many milligrams of gas are formed if 10.0mL of 3.00% hydrogen peroxide solution decomposes? the density of the solution is 1.00g/mL. show work using dimensional analysis.
Answers
Answer
So, you that your hydrogen peroxide solution had a volume of 5 mL. The density of this solution was listed at
1.02 g/mL.
The weight by volume percent concentration,
%w/v, for a hydrogen peroxide solution that has that density is listed at 6.6%.
What are two types of fibres obtained from the fleece of a sheep? Which one is used to make wool?
Answers
Answer:
Answer: The two types of fibres obtained from the fleece of a sheep are beard hair, which are coarse and fine, and soft under hair, which grow near the skin. The under hair are used to make wool.
Explanation:
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A Sample of helium occupies a volume of 160 cm³ at 100 KPa and 25°C. what Volume will it occupy if the pressure is adjusted to 80 KPa and the temperature remains unchanged?. -273
Answers
Boyle's Law-
\(\:\:\:\:\:\:\:\:\:\:\:\star\:\sf \underline{ P_1 \: V_1=P_2 \: V_2}\\\)
(Pressure is inversely proportional to the volume)
Where-
\(\sf V_1\) = Initial volume\(\sf V_2\) = Final volume\(\sf P_1\) = Initial pressure\(\sf P_2\) = Final pressureAs per question, we are given that -
\(\sf V_1\) = 160 cm³\(\sf P_1\) = 100KPa\(\sf P_2\) = 80KPaNow that we have all the required values and we are asked to find out volume which will be occupied if the pressure is adjusted to 80 KPa and the temperature remains unchanged. For that we can put the values and solve for the final volume of helium-
\(\:\:\:\:\:\:\:\:\:\:\:\star\:\sf \underline{ P_1 \: V_1=P_2 \: V_2}\)
\( \:\:\:\:\:\:\longrightarrow \sf 100 \times 160 = 80 \times V_2\\\)
\( \:\:\:\:\:\:\longrightarrow \sf V_2 = \dfrac{100 \times 160}{80}\\\)
\( \:\:\:\:\:\:\longrightarrow \sf V_2 =100\times \cancel{\dfrac{ 160}{80}}\\\)
\( \:\:\:\:\:\:\longrightarrow \sf V_2 = 100 \times 2\\\)
\( \:\:\:\:\:\:\longrightarrow \sf \underline{V_2 = 200 \:cm^3 }\\\)
Therefore, 200 cm³ will be occupied if the pressure is adjusted to 80 KPa and the temperature remains unchanged.experimental evidence indicates that the nucleus of an atom
Answers
The nucleus of an atom is positively charged and contains most of the mass if the atom.
What is an atom?An atom is the smallest particle of a an element that can take part in a chemical reaction.
Atoms are made up of other smaller sub-particles which are:
neutrons which are neutral protons which are positively charged electrons which are negatively chargedThe protons and neutrons are found in the nucleus of an atom
The electrons are found regions around the nucleus.
Due to the positive charge of the protons, the nucleus of an atom are positively charged and is massive.
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In a constant-pressure calorimeter, 55.0 mL of 0.340 M Ba(OH), was added to 55.0 mL of 0.680 M HCI. The reaction caused the temperature of the solution to rise from 22.21 °C to 26.84 °C. If the solution has the same density and specific heat as water (1.00 g/mL and 4.184J/g • °C.) respectively), what is A4 for this reaction (per mole H,O produced)? Assume that the total volume is the sum of the individual volumes.
Answers
Answer:
Ba(OH)2 + 2 HCl → BaCl2 + 2 H2O
The reactants are present in equimolar amounts, so there is no excess or limiting reactants.
(0.0500 L) x (0.600 mol/L HCl) x (2 mol H2O / 2 mol HCl) = 0.0300 mol H2O
(4.184 J/g·°C) x (50.0 g + 50.0 g) x (25.82 - 21.73)°C = 1711.256 J
(1711.256 J) / (0.0300 mol H2O) = 57042 J/mol = 57.0 kJ/mol H2O
Explanation:
What volume of 0.130 M HCl is required for the complete neutralization of 1.30 g of NaHCO3 (sodium bicarbonate)?
Answers
Answer: Volume required is 0.115 L or 115 ml
Explanation:
moles of \(NaHCO_3\) = \(\frac{\text {given mass}}{\text {Molar mass}}=\frac{1.30g}{84g/mol}=0.015mol\)
The balanced chemical equation is:
\(HCl+NaHCO_3\rightarrow NaCl+H_2CO_3\)
1 mole of \(NaHCO_3\) requires = 1 mole of HCl
Thus 0.015 mol of \(NaHCO_3\) requires = \(\frac{1}{1}\times 0.015=0.015\) mole of HCl
Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.
\(Molarity=\frac{n}{V_s}\)
where,
n = moles of solute
\(V_s\) = volume of solution in L
\(0.130=\frac{0..015}{V_s}\)
\(V_s=0.115L\)
Thus volume required is 0.115 l or 115 ml
Please Help me ASAP - Next 90 minutes!! With my Homework Assignment!
100 Points + Brainliest if correct! Both questions please!!!!
Answers
Answer:
see below
Explanation:
1) here we are given that one mole of propane releases 2221kJ of energy.
now use unitary method as ,
to burn 1 mol (44g) propane 2221kJ of energy is required
to burn 1g of propane 2221kJ/44g of energy is required
therefore to burn 25g of propane 2221/44*25kJ of energy is required= 1261.93kJ ≈ 1262 kJ
Hence 1262kJ of energy is required to burn 25g propane.
2) amount of heat absorbed= 25kJ
amount of work done = 12J
change in energy= (25-12)kJ = 13kJ
Hence the value of ∆E is 13kJ .
and we are done!
Calculate the N/Z ratio for elements with atomic numbers 104 through 109. Are they in the belt of stability? Are they stable? How do you know?
Answers
The ratio of neutrons to protons, or the N/Z ratio, plays a crucial role in determining a nucleus' stability. The range of N/Z ratios in which nuclei are stable is generally referred to as the belt of stability.
How can you tell whether a substance is stable or unstable?If the forces between the constituents of the nucleus are equal, an atom is stable. If these forces are out of balance or if the nucleus has an excessive amount of internal energy, an atom is unstable (radioactive).
Z = 104 for Rutherfordium, element 104. The isotopes 261Rf and 262Rf, having masses of 261 and 262, respectively, have the longest half-lives. Accordingly, N/Z ratios are:
261Rf: N/Z = (261-104)/157 = 1.08
262Rf: N/Z = (262-104)/158 = 1.09
These N/Z ratios are a little bit higher than the average belt of stability values, which are about 1.0 for heavy nuclei. These isotopes are thought to be reasonably stable because they are close enough.
Z = 109 for Meitnerium, element 109. The isotopes 278Mt and 282Mt, with masses of 278 and 282, respectively, have the longest half-lives. Accordingly, N/Z ratios are:
278Mt: N/Z
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On a hot day, you might cool off by sitting in the shade of a big tree, eating a cold popsicle, going into an air-conditioned building, or jumping into a cold lake. Which of these are examples of using technology?
Answers
Answer:
Air conditionded building
Explanation: Ice cream is processed food so techniacally it could be using technology but Air conditioning is a unit of metal and is built. Hope this is right!