No, ethanol is not a better solvent for the following reaction. because ethanol is more acidic then alkyne. so NH2- abstracts proton from ethanol insted of alkyne. so expected reaction will not proceed if we use ethanol. CH3CH2OH + NH2- -----------> CH3CH2O- + NH3
Ethanol is a polar solvent, which means that it has a partial positive charge on one end and a partial negative charge on the other end. This polarity allows ethanol to dissolve polar compounds, such as acids and bases, which are commonly involved in proton transfer reactions. Ethanol also has a relatively low boiling point and is relatively less toxic than other solvents, making it a convenient choice for many laboratory procedures.
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The complete question is:
would ethanol (ch3ch2oh) be a suitable solvent in which to perform the following proton transfer?
CH3CH2OH + NH2- -----------> CH3CH2O- + NH3
Balance each redox reaction in basic solution using the half reaction method. O2 + Cr3+ → H2O2 + Cr2O7^2-
The final balanced redox reaction in the basic solution is:
O2 + 2H2O + Cr3+ → H2O2 + Cr2O7^2- + 4OH-
What is a redox reaction?Generally, The half-reaction method involves breaking the overall redox reaction into two half-reactions: oxidation and reduction. The oxidation half-reaction is:
Cr3+ → Cr2O7^2- + 3e-
The reduction half-reaction is:
O2 + 2H2O + 4e- → 4OH-
To balance the electrons in the oxidation half-reaction, we need to add 3 electrons on the right side. To balance the electrons in the reduction half-reaction, we need to add 4 electrons on the left side.
When we combine the two half-reactions, we get:
O2 + 2H2O + Cr3+ → H2O2 + Cr2O7^2- + 3e-
We then add 4OH- on the right side to neutralize the electrons on the left side, giving us:
O2 + 2H2O + Cr3+ → H2O2 + Cr2O7^2- + 3e- + 4OH-
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Which one of the following reactions would produce (S)-3-methoxyheptane in high yield? Entry field with correct answer
O sodium methoxide + (R)-3-bromoheptane
O sodium methoxide + (S)-3-bromoheptane
O sodium (R)-3-heptoxide + bromomethane
O sodium (S)-3-heptoxide + bromomethane
O Sodium methoxide + (S)-3-bromoheptane is the reactions would produce (S)-3-methoxyheptane in high yield.
Write about (S)-3-methylheptane.There are 26 atoms in the (S)-3-methylheptane molecule (s). Eight carbon atoms and 18 hydrogen atoms are present (s). Therefore, C8H18 can be used to represent the chemical formula of (S)-3-Methylheptane.
The molecular formula, as opposed to the empirical formula, which gives the numerical proportions of atoms of each kind, is the basis for the chemical formula of (S)-3-Methylheptane, which is based on the molecular formula and does not include structural information.
According to the rule of conservation of mass, a chemical reaction does not cause a change in the amount of any one of the elements included in a chemical formula. In light of the chemical formula, each side of the equation must therefore represent the same amount of any given element.
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Predict the number of signals and their multiplicity in the 1H-NMR spectra of the following compounds.
(i) ClCH2CH2CH2Cl (ii) ii)CH3CH2COOCH(CH3)2
I ClCH2CH2CH2Cl (c)
Such a demonstration is possible. ClーCH2ーCH2ーCH2ーClThe structural formula of the supplied compound's carbon atoms is marked as C-1, C-2, and C-3 on the left side.The carbon atom C-2 is seen to have a plane of symmetry there.The hydrogen (H) atoms connected to C-1 and C-3 are hence equivalent. Additionally, the hydrogen (H) atom connected to the C-2 carbon atom has a distinct chemical environment than the C-1 and C-3 carbon atoms.Thereby,
In the specified compound, there are three equivalent sets of protons. In the 1H-NMR spectrum, three signals have been identified.The (n+1) rule, where n is the number of hydrogen atoms bonded to a neighbouring carbon atom, is used to calculate the multiplicity of the three signals as follows:
1. There are n+1 H atoms connected to the C-1 carbon atom.Here, n =2 (because the nearby carbon (C-2) atom contains two H-atoms)So, (2+1) = 3 (signal shows as a triplet) (signal appears as a triplet)Similarly,2. H is bonded to carbon atom C-2 in multiples of (4+1) = 5. (appears as a quintet)3. The H atoms linked to the C-3 carbon atom have a multiplicity of (2+1) = 3. (appears as a triplet)CH3CH2COOCH(CH3)2
It may appear as:
CH3ーCH2ーCOーOーCHー(CH3)2
On the right side of the structural formula, the two -CH3 groups connected to the -CH group are in the same chemical environment. This makes the hydrogen (H) atoms in the two (-CH3) groups equal. 6 protons will thus produce a single signal in 1H-NMR.In the 1H-NMR spectrum, the H atom in the -CH group (carbon atom single bonded to the O atom) on the right side of the structural formula produces one signal.On the left side of the structural formula, the 2 H atoms in the -CH2 group joined to the C=O group produce 1 signal in the 1H-NMR spectrum.The given compound contains a total of 4 equivalent protons. Consequently, the 1H-NMR spectrum shows 4 signals.
The (n+1) rule, as given in the above part I is once more used to calculate the multiplicity of the four signals.
1. The number of 6 H molecules in the two CH3 groups is equal to n+1.
n= 1 (just 1 H is present on the next carbon that is, -CH group) (only 1 H is present on the adjacent carbon that is, -CH group)In other words, the multiplicity of 6 H = 1+1 = 2 (signal appears as a doublet)Similarly,2. 1H on the CH group has a multiplicity of 6+1 = 7. (signal appears as a septet)3. 2H's multiplicity on the CH2 group equals 3+1 = 4. (A quartet represents signal.)The multiplicity of 3H on the CH3 group = 2+1 =3 (signal appears as a triplet)To learn more about compound refer to:
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If a scientist was attempting to decide what type of light was best for reducing migraines, what is a dependent variable that would be tested? Number of migraines recorded in the study The different types of light used in the study Randomization of people used in the study The number of light bulbs used in the study
The dependent variable in this experiment is the number of migraines recorded in the study (option A).
What is dependent variable?Dependent variable in an experiment is the outcome measured to see the effectiveness of the treatment.
In an experiment, the independent variable is altered or changed to bring about a response in the dependent variable.
According to this question, if a scientist was attempting to decide what type of light was best for reducing migraines, the number of migraines recorded is the dependent variable.
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A sample of sodium oxide weighing 12.57 g contains 9.34 g of sodium. What is the empirical formula for this compound?
The empirical formula of a compound is NaO, and the approximate molar mass is 76 g.The answer then is Na2O2.
What is Empirical formula?An empirical formula is a compound's Chemical formula that only specifies the ratios of the elements it contains and not the precise number or arrangement of atoms. This would be the compound's element with the lowest whole number ratio.
Steps to write Empirical formulaAssume a 100g sample of the substance so that the percentages can be translated into grams directly.To convert grams of any element to moles, use their molar masses.Divide the moles of each element by the mole that is the least from step 2 to arrive at a whole-number ratio.The empirical formula can be expressed with the moles as the subscript of each element if all the moles are whole numbers at this stage (or extremely near to it).There may be instances where one or more of the moles determined in step 3 are not whole numbers. Each mole should be multiplied by the least whole number that will make it a whole number.To know more about Empirical formula refer to:
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What is the mass of 3.25 moles of NaF
How do the Z, N, and A values compare for each pair of atoms?
(a) ^3_1 H and ^3_2 He (b) ^14_6 C and ^15_7 N
(c) ^19_9 F and ^18_9 F
The Z value is the atomic number of an atom, which is the number of protons in the nucleus of an atom.
What is nucleus?The nucleolus is a specialized structure located in the nucleus of a eukaryotic cell. It is composed of proteins and RNA molecules, and is responsible for the production, assembly, and transport of ribosomes. The nucleolus is the site of transcription, processing, and assembly of ribosomal RNA (rRNA) precursors into the ribosomal subunits that make up the ribosome. The ribosome is the cell's protein-synthesizing machinery, and the nucleolus is essential for its production. The ribosomes are then released into the cytoplasm, where they can translate mRNA into proteins.
The N value is the number of neutrons in the nucleus of an atom, and A is the mass number, which is the sum of the number of protons and neutrons in the nucleus of an atom.
For the first pair of atoms, ^3_1 H and ^3_2 He, the Z value for both is 3, since both have 3 protons in their nucleus. However, the N value for ^3_1 H is 1 and the N value for ^3_2 He is 2. Therefore, ^3_2 He has one more neutron in its nucleus than ^3_1 H. Lastly, the A value for ^3_1 H is 1 and the A value for ^3_2 He is 4. Therefore, the mass number of ^3_2 He is 3 times higher than ^3_1 H.
For the second pair of atoms, ^14_6 C and ^15_7 N, the Z value for both is 6, since both have 6 protons in their nucleus. The N value for ^14_6 C is 8 and the N value for ^15_7 N is 7. Therefore, ^15_7 N has one less neutron in its nucleus than ^14_6 C. Lastly, the A value for ^14_6 C is 14 and the A value for ^15_7 N is 15. Therefore, the mass number of ^15_7 N is 1 higher than ^14_6 C.
For the third pair of atoms, ^19_9 F and ^18_9 F, the Z value for both is 9, since both have 9 protons in their nucleus. The N value for ^19_9 F is 10 and the N value for ^18_9 F is 9. Therefore, ^18_9 F has one less neutron in its nucleus than ^19_9 F. Lastly, the A value for ^19_9 F is 19 and the A value for ^18_9 F is 18. Therefore, the mass number of ^18_9 F is 1 lower than ^19_9 F.
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Translate the sawhorse projection below into a wedge-and-dashed bond Cram projection.
The sawhorse projection of the molecule below can be translated into a wedge-and-dashed Cram projection by rotating the molecule 90 degrees so that the hydrogen atoms are on the left and the oxygen atom is on the right.
What is projection?Projection is a method of displaying data or information in a visual format, such as a graph, chart, map, or diagram. It is used to display relationships between two or more variables, such as a change in population over time. It can also be used to show the relationship between multiple variables, such as the correlation between unemployment and poverty. Projection is an important tool for data analysis and decision making, as it provides a visual representation of data that is easier to interpret than tables and equations.
Then, the bonds between the carbon and hydrogen atoms are represented by wedges, while the double bond between the carbon and oxygen atoms is represented by a dashed line. This results in the following Cram projection:
H3C-O-C-H2.
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A 75 N force stretches a spring 175 cm. What was the proportionality constant?
Answer:
The proportionality constant of the spring is 0.42857 N/cm.
Explanation:
The proportionality constant (k) of a spring is given by the equation: force (F) = k * displacement (x)
k = F / x
Therefore, to find the proportionality constant of the spring, we can divide the force applied (75 N) by the displacement (175 cm)
k = 75 N / 175 cm
k = 0.42857 N/cm
The proportionality constant of the spring is 0.42857 N/cm.
The graphs below all refer to the same reaction. What is the order of this reaction?
o first order
o second order
o Unable to predict
o zeroth order
Zeroth order represents one of the choices that is correct for this reaction, according to the statement that is given.
What does the word "reaction" signify in chemistry?The conversion of one or more elements, known as reactant molecules, into one maybe more chemical drugs, known as products, is referred to as a reaction mechanism. Entities are composed of chemical elements or compounds.
What are the different types of reactions?Combustion, combination, decomposition, single-replacement, and double-replacement are the five fundamental categories of chemical reactions. You can categorize a reaction by looking at the reactants and the products of the reaction in question. More than single category will apply to some reactions.
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The complete question is-
The graphs below all refer to the same reaction. What is the order of this reaction?
first order
second order
Unable to predict
zeroth order
Calculate the pH of a solution prepared by dissolving 0.21 mol of acetic acid and 0.43 mol sodium acetate in water and adjusting the volume to 500 mL
The pH of the solution is 5.07.
What is the pH?We know that when we mix the sodium acetate with a solution of acetic acid what we are going to have is a buffer. We know that the buffer is the kind of solution that we are able to get from a weak acid and its salt just as acetic acid and sodium acetate.
We know that;
Molarity of the salt = 0.43/0.5 L = 0.86 M
Molarity of the acid = 0.21/0.5 L = 0.42 M
Hence;
pH = pKa + log(salt/acid)
pH = 4.76 + log(0.86/0.42)
pH = 5.07
We would have a pH of 5.07
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Circle the reactant that is a nucleophile and draw the mechanism using the appropriate arrows for the following reaction.
It is a tertiary alkyl halide that is being supplied. It will easily go through the SN1 replacement. The following steps will lead to the reaction(Attached).
A reactant known as a nucleophile provides an electron pair in order to create a covalent bond. Typically, a nucleophile has a negative charge or is neutral with one or two donatable electrons. Some examples include H2O, -OMe, or -OtBu. The species with a lot of electrons is a nucleophile overall.
A nucleophile typically has one electron pair and is negatively charged or neutral. Some examples include H2O, -OMe, or -OtBu. The species with a lot of electrons is a nucleophile overall. Generally speaking, electrophiles are positively charged or neutral organisms with vacant orbitals that are drawn to an electron-rich center.
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Which of these changes is an example of a physical change?
A. electrolysis of water forming hydrogen and oxygen
B. cooking an egg
C. melting ice
D. iron combining with oxygen to form rust
Answer: C. Melting Ice
Explanation: The rest are chemical changes, the ice is the same substance (water), just changing physical forms, solid --> liquid
Calculate the frequency of the red light emitted by a neon sign with a wavelength of 659.9nm
The red light emitted by a neon sign has a frequency of 4.5410^11 Hz.
What is frequency?Frequency is the number of waves which passes through a fixed point at a certain time.
Here,
The frequency of the red light emitted by a neon sign is 4.54×10¹¹ Hz
Given neon sign with a wavelength of 659.9nm
frequency of the red light is to be calculated
Wavelength and frequency are related to each other by Wavelength=Speed/frequency
speed of light is 3×10⁸ m/s
Wavelength=659.9nm that is equal to 6.599 ×10⁻⁷m
Frequency =3×10⁸ m/s÷6.599 ×10⁻⁷m
Frequency =4.54×10¹¹ Hz
The frequency of the red light emitted by a neon sign is 4.54×10¹¹ Hz.
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Balance the equation below
Answer: [tex]K_{2}[/tex]O + [tex]H_{2}[/tex]O --> 2KOH
Explanation: To balance a chemical equation the atoms of an element on product side is equal to reactant side.
draw the structures of ethane, ethene, and ethyne. show all hydrogen atoms.
The structures of ethane, ethene, and ethyne. show all hydrogen atoms is given below.
What is Ethane?Ethane is a hydrocarbon molecule with the chemical formula C2H6. It is composed of two carbon atoms joined by a single covalent bond and six hydrogen atoms bound to the carbons. The structural formula of ethane is shown below. All six hydrogen atoms are explicitly shown.
Ethene
Ethene is a hydrocarbon molecule with the chemical formula C2H4. It is composed of two carbon atoms joined by a double covalent bond and four hydrogen atoms bound to the carbons. The structural formula of ethene is shown below. All four hydrogen atoms are explicitly shown.
Ethyne
Ethyne is a hydrocarbon molecule with the chemical formula C2H2. It is composed of two carbon atoms joined by a triple covalent bond and two hydrogen atoms bound to the carbons. The structural formula of ethyne is shown below. Both hydrogen atoms are explicitly shown.
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How many atoms are in 17.1 grams of LiCl?
17.1 grams of LiCl is equal to 0.6 moles of LiCl.
What is ionic compound?An ionic compound is a chemical compound composed of ions held together by electrostatic forces termed ionic bonding. It is a type of chemical bond that generates two oppositely charged ions, typically a cation (positive ion) and an anion (negative ion). In other words, ionic compounds are formed when a metal and a non-metal react to form a salt. Examples of ionic compounds include table salt (NaCl), baking soda (NaHCO3), and calcium chloride (CaCl2).
Since LiCl is an ionic compound, it is composed of both Li+ and Cl- ions. Each mole of LiCl contains 6.023 x 1023 formula units, which is the same as 6.023 x 1023 atoms. Therefore, 17.1 grams of LiCl contains 3.61 x 1024 atoms of Li+ and 3.61 x 1024 atoms of Cl-.
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Which of the following is (are) formed in the reaction between ethyl butanoate and ethyl amine?
Select one:
O a. ethanol O b. 1-butanol O c. N-ethylbutanamide O d. both A and C O e, both B and C
Both B and C reaction between ethyl butanoate and ethyl amine.
What is amines?Amines are organic compounds derived from ammonia by replacing one, two, or all three hydrogen atoms with alkyl or aryl groups. They are classified as primary, secondary, and tertiary amines depending on the number of carbon atoms connected to the nitrogen atom. Amines have a strong smell, and many of them are used in the production of pharmaceuticals, dyes, and other products. Amines are also important intermediates in the synthesis of many organic compounds.
In the reaction between ethyl butanoate and ethyl amine, both 1-butanol and N-ethylbutanamide are formed. Ethyl butanoate is an ester, which consists of an alcohol and an acid joined together. When ethyl amine is added, the ester breaks apart, releasing the acid and alcohol components. The acid component is then protonated by the amine, forming N-ethylbutanamide. The alcohol component, which is 1-butanol, is also released in the reaction.
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draw the alcohol you would use to produce each of the following ketones: draw all hydrogen atoms.
A. 3-pentanone
B. 2-pentanone
C. 3-hexanone
Atoms one of the following ketones, all of which contain hydrogen atoms (C5H10), would be created using alcohol.
What is hydrogen, H2 or H?The chemical formula of hydrogen is H2, and it has an molar mass of 1. The atomic number one of the lightest element is hydrogen, abbreviated H. It is a gas at room pressure and temperature that has the functional group H2 hydrogen chloride (HCl), which is a combination of elements hydrogen and chlorine. It is also tasteless, odorless, and highly combustible. Hydrochloric acid is the name given to a gaseous solution in water.
Why H2 rather than H?As a result, when two hydrogen atoms bind, they share electrons. The term for this is covalent bonding. In your forthcoming classes, you will receive a detailed introduction to it. Consequently, hydrogen is H2 rather than H.
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What Volume of 25% (w/v) solution HNO3?
To find the volume of 25% (w/v) solution HNO3, you need to know the mass of HNO3 and the total volume of the solution.
What do you mean by volume?
Volume is a measure of the amount of space taken up by a three-dimensional object or substance. It is commonly used to measure the amount of a liquid, gas, or solid. In chemistry, volume is usually expressed in units such as liters (L), milliliters (mL), cubic centimeters (cm3), or milligrams (mg).
For example, if the total volume of the solution is 100 mL and the mass of HNO3 is 25 g, then the volume of 25% (w/v) solution HNO3 is 25 mL.
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Complete the table of electron-group arrangements, molecular shapes and bond angles
Dichloromethane is the chemical name for this substance. Nitrous oxide is the name given to this chemical. Sulfur trioxide is the chemical formula for this substance.
What is electron-group arrangements?The three-dimensional arrangement of atoms in a molecule is known as electron group geometry. A molecule's geometry is a significant feature that influences the physical and chemical characteristics of a substance. Thus, the "Electron Group" geometry of each center atom in a structure may be established simply by counting the number of "groups" of electrons surrounding the atom and then imagining how those groups would organize themselves to be as far apart as feasible. Any sort of bond—single, double, or triple—and lone electron pairs are the two types of electron groups. The initial step in applying VSEPR to simple molecules is to count the number of electron groups surrounding the core atom. Keep in mind that a multiple bond only counts as one electron group.
Here,
a). SO₃
This compound is known as sulfur trioxide.
The molecular shape of sulfur trioxide is trigonal planer.
And the bond angle is 120°.
b). N₂O
This compound is known as Nitrous oxide. Here, nitrogen is in the center. There is no lone pair around the nitrogen atom and it forms two sigma bonds with the other two atoms.
It is linear in shape.
The bond angle between them is 180°.
c). CH₂Cl₂
This compound is known as the Dichloromethane
The molecular shape of the compound is tetrahedral.
The bond angles is 120°
This compound is known as the Dichloromethane. This compound is known as Nitrous oxide. This compound is known as sulfur trioxide.
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Which of the following Nitrogen Oxides have the same empirical formula? a)N2O5 b)NO c)N2O d)N2O4 e)NO2
N2O5 Nitrogen Oxide have the same empirical formula. The simplest whole number ratio of atoms present in a substance is its empirical formula in chemistry.
What is empirical formula?The simplest whole number ratio of atoms present in a substance is its empirical formula in chemistry. The empirical formula of sulphur monoxide, abbreviated SO, and disulfur dioxide, abbreviated S2O2, are two straightforward examples of this idea. The empirical formula is the most straightforward formula for a compound and is defined as the ratio of subscripts of the smallest whole number of the formula's constituent elements. It is referred to as the simplest formula as well. We can determine the relative atomic ratios in a compound using an empirical formula. The ratios also hold true at the molar level.The empirical formula is typically applied to simply display the atoms that make up a molecule. This is helpful if you want to quickly identify the elements you're working with. When determining the number of atoms in a chemical, the molecular formula is most helpful.
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A phosphorus compound that contains 34.00% phosphorus by mass has the formula X3 P2
The equation for the phosphorus by mass of the compound with the chemical formula of X3P2 is:%Phosphorus=2×(MolarMassofPhosphorus)/MolarMassofthecompound×100.
A phosphorus compound?Given in this issue is a phosphorus compound with a mass percentage of 34.0 percent phosphorus and the formula x, 3 p 2. Now that x must be identified, the formula is x, 3, p, 2.
There are two phosphorus atoms present, and their combined mass will be 31.0 grammes per mole. That equates to 62.0 g/mol. Given in this issue is a phosphorus compound with a mass percentage of 34.0 percent phosphorus and the formula x, 3 p 2.
Now that x must be identified, the formula is x, 3, p, 2. There are two phosphorus atoms present, and their combined mass will be 31.0 grammes per mole. That equates to 62.0 g/mol.
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What is the correct representation for the subshell with n = 2 and l = 1?
2p
1p
1d
2d
Answer:
The next part is 4, 16, 32
Explanation:
just did it on edge :))
Calculate the total number of atoms in 0.111 mol of Fe(CO)3(PH3)2. please write as many steps as you can so I can understand it.
The total number of atoms in 0.111 mole of Fe(CO)3(PH3)2 is 1.00 × 10^24.
To calculate the number of atoms first we need to calculate the number of moles. In 1 mole of a substance, the number of atoms is NA or 6.023×1023 atoms. This number is also known as Avogadro's number. Multiplying the given moles with NA gives the total number of atoms.
Here, we will find the total number of moles of each element. So let us consider element present in the compound and number of moles of that element. Such that Fe- 1, C- 3, O - 3 , P – 2 , H – 6 . So total number of atoms molecule is 15. The number of atoms in 0.111 moles of Fe(CO)3(PH3)2, therefore 15 x 0.111 which gives 1.665 moles of atom. That is 1.665 x 6.023 x 10^23. This gives the value as 1.00 x 10^24.
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Determine the average rate of change of B from t=0 s to t=402 s.
A ---> 2B
Time: Concentrations of A:
0 0.710
201 0.430
402 0.150
the average rate of change of B from t=0 s to t=402 s. A ---> 2B with
Time: Concentrations of A: 0 0.710, 201 0.430, 402 0.150 is 0.07%
To determine the average rate of change of B from t=0 s to t=402 s, we need to find the change in concentration of B (delta B) and divide it by the change in time (delta t). From t=0 s to t=201 s, the concentration of A changes from 0.710 to 0.430. Since the reaction is A ---> 2B, we can assume that the concentration of B doubles the concentration of A. So, the concentration of B changes from 0.710/2 = 0.355 to 0.430/2 = 0.215.The change in concentration of B is 0.215 - 0.355 = -0.140
From t=201 s to t=402 s, the concentration of A changes from 0.430 to 0.150. Using the same assumption, the concentration of B changes from 0.215 to 0.150/2 = 0.075. The change in concentration of B is 0.075 - 0.215 = -0.140 The total change in concentration of B is the sum of the two changes, which is -0.140 + (-0.140) = -0.280. The total change in time is 402s - 0s = 402sTherefore, the average rate of change of B is -0.280 / 402s = -0.000696, or -0.07% (two significant figures)
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Draw the three-dimensional representation for the R enantiomer of the molecule shown below.
The three-dimensional representation for the R enantiomer of the molecule shown below:
What is R enantiomer?An enantiomer is one of two stereoisomers that are not superposable onto their own mirror image in chemistry. It is also known as an optical isomer, antipode, or optical antipode. Enantiomers, like one's right and left hands, cannot be superposed on one other when staring at the same face. The chiral compound's enantiomers are named using the "right hand" and "left hand" nomenclature. The stereocenters are denoted by the letters R or S. Consider the first image: a curved arrow is drawn from the most important (1) substituent to the least important (4) substituent.
Here,
The following is a three-dimensional depiction of the molecule's R enantiomer:
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Predict the product formed when calcium, Ca, combines with arsenic, As? (Please explain why) a. Ca3As2 b. Ca2As3 c. CaAs d. Ca2As2 e. Ca3As3
The chemical element calcium has the atomic number 20 and the letter Ca as its symbol. Calcium is an alkaline earth metal that reacts with air to create a black oxide-nitride coating.
What happens when calcium reacts with?With the chemical symbol Ca and atomic number 20, calcium is a member of the calcium family. Calcium is a reactive metal and an alkaline earth metal that, when exposed to air, develops a shady oxide-nitride layer.
In this article, the arsenic acid formula—also known as orthoarsenic acid formula or as arsoric acid formula—is explored. Three hydroxyl and one oxo group make up this arsenic oxoacid.
Arsenopyrite is the mineral with the greatest prevalence of arsenic. Realgar, orpiment, and enargite are some more minerals. Most arsenic is created as a byproduct of the copper and lead refining process.
Metal calcium and water interaction - Less vehemence is produced when calcium metal combines with water.
Therefore, the correct answer is option e) Ca3As2.
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How does the pH at the equivalence point change as the acid being titrated becomes weaker? How does the volume of NaOH( aq ) needed to reach the equivalence point change?
As the acid weakens, the pH at the equivalence point rises (becomes more basic). The amount of extra base required to achieve the equivalence point grows.
What is titration?Titration is a standard quantitative chemical analysis laboratory method for determining the concentration of a specified analyte. The titrant or titrator is a reagent that is produced as a standard solution of known concentration and volume. A titration is a procedure that uses a known solution to determine the concentration of an unknown solution. Typically, until the reaction is complete, the titrant (the known solution) is added from a buret to a known quantity of the analyte (the unknown solution). A titration is described as 'the process of calculating the quantity of a material A by adding calibrated increments of substance B, the titrant, with which it interacts until precise chemical equivalency (the equivalence point) is obtained'.
Here,
The pH at the equivalency point rises as the acid diminishes (becomes more basic). The quantity of additional base needed to reach the equivalence point increases.
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Calculate the binding energy per nucleon for 3He and 4He. MeV/nucleon (for 3He) = MeV/nucleon (for 4He) = Which nucleus is more tightly bound?
Nuclear binding energy is defined as the minimum amount of energy required to disassemble or break down an atom's nucleus into the subatomic particles that make it up (which are protons and neutrons).
Define binding energy per nucleon?Protons and neutrons, a pair of subatomic particles found in the nucleus, are collectively referred to as nucleons.The difference between nuclear attraction and the disruptive energy of the electric force constitutes the net binding energy associated with a certain nucleus.
It is important to note that as the number of nucleons in the nucleus increases, so does the net binding energy per nucleon.As a result, the atomic number is inversely proportional to the net binding energy per nucleon. Using the formula BE=(m)c2, where m is the mass defect, get the total binding energy (BE).
BE divided by A yields the binding energy per nucleon (BEN) (Equation 10.3. 3). BE=[2mp+2mn]−m(4He)c2. Say, for instance, that we have a nucleus of mass MA and Z protons, N neutrons, and A.
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