When 1-Chloropentane is treated with sodium ethoxide, it follows the SN2 mechanism. Therefore, option (1) is correct.
What is the SN2 mechanism?The SN2 reaction can be defined as a type of reaction mechanism where one bond is broken and one bond is formed in one step. "SN" refers that the reaction is a nucleophilic substitution and proceeds via a bi-molecular mechanism. Here, both the reacting chemical species are involved in the rate-determining step.
The reaction takes place at an aliphatic sp³ carbon center with an electronegative, stable leaving group attached to a halide atom. The breaking of the C-X bond and the formation of the new bond occur simultaneously via a transition state in which a carbon under nucleophilic attack will be pentacoordinate.
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Properties and Reactions of Acids and Bases
CH₃COOH
Initial color of universal indicator___________
Color of indicator after three drop of NaOH________
Drops of NaOH required to reach pH 7__________
mL NaOH required to reach pH 7___________
pH of solution______________
pH of solution_____________
Drops to reach pH 10___________
CH₃COOH Initial universal indicator colors are yellow to red, and the indicator turns pink after three drops of NaOH.
What are instances and indicators?Indicator are weak bases and acids that exhibit a color change as hydrogen ion concentration in a solution varies or as a solution's pH changes. The indicators slightly separate into ions in the water. Indicators include things like Litmus, turmeric, phenol red, etc.
What are fundamental markers?Chemicals called acid-base indicators can tell if a water solution is acidic, balanced, or alkaline. Because of how acidity and alkalinity affect pH, they are also alluded to as pH indicators. Red cabbage juice, phenolphthalein, and litmus paper are a few examples of acid-base indicators.
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which of the following is the equilibrium constant expression for the reaction? 2no(g) o2(g) → 2no2(g)
a. Keq = [NO3]/[NO]^1[O2]
b. Keq = [NO2]^2/[NO]^1[O2]
c. Keq = [NO2]^2/[NO]^2 + [O2]
d. Keq = 2[NO[2/2[NO] + [O2]
e. None of the choices are correct
The equilibrium constant expression for the reaction is:
Keq = [NO₂]² / [NO]² * [O₂]Hence, None of the choices are correct: option E is correct.
What is the equilibrium constant of a reaction?The equilibrium constant of a reaction is a measure of the ratio of the equilibrium concentration of the products of a reaction, to the equilibrium concentration of the reactants where each concentration is raised to a power corresponding to the coefficient in the balanced equation of the reaction.
The equilibrium constant of the reaction is obtained as follows:
equation of the reaction: 2 NO (g) + O₂ (g) ---> 2 NO₂ (g)
Keq = [NO₂]² / [NO]² * [O₂]
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Find the percent by mass of each element in C12H22O11
STEP 1:
C 12 x 12.01 =
H 22 x 1.00 =
O 11 x 15.99 =
Molar Mass =
The percent by mass of each element in C12H22O11 is 42.1 % for C, 6.4 % for H, and 51.43 % for O respectively.
The mass consistent with cent is defined as the grams of solute consistent with grams of solution, accelerated with the aid of one hundred to get the share. The Mass in keeping with cent components is expressed as fixing for the molar mass and also for the mass of each detail in 1 mole of the compound. Mass percent is one way of representing the attention of an element in a compound or a component in a mixture
Calculation:-
Molar Mass of C12H22O11 = 342
C 12 x 12.01 = 144.12 / 342 × 100
= 42.1 %
H 22 x 1.00 = 22/ 342 × 100 = 6.4 %
O 11 x 15.99 = 175.89/ 342 × 100 = 51.43 %
Mass percentage composition is likewise recognized percent via weight. it's miles abbreviated as w/w%. For a solution, mass percent equals the mass of an element in a single mole of the compound divided with the aid of the molar mass of the compound, increased with the aid of 100%.
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7. A mixture of oxygen, nitrogen, and hydrogen gases exert a total pressure of 740 torr at 0°C. The partial
pressure of oxygen is 200 torr and the partial pressure of nitrogen is 400 torr. What is the partial pressure
of hydrogen gas in the mixture?
a. 140 torr
b. 200 torr
c. 740 torr
d. 1,340 torr
The partial pressure of hydrogen gas in the mixture is 140 torr. Option A.
Solution:
So if the total is 740torr Hg then 740 = 400+200+x so solving for x the unknown pressure we get 740-600 = 140torr.
In a gas mixture, the partial pressure of each gas is the product of the total pressure and the mole fraction of that gas. The pressure exerted by a single gas in a mixture is called partial pressure. Assuming you have an ideal gas mixture, you can use the ideal gas law to solve the problem of gases in a mixture. The pressure exerted by a gas in a gas mixture when it alone occupies the entire volume occupied by the mixture. A partial volume of a particular gas in a mixture is the volume of one component of the gas mixture.
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Use the diagram below to answer question 13
13. A student walks from home to school,
on to a soccer field, then to an ice cream
shop, and finally home. Use grid distances
and directions to describe each leg of his
trip. What is the distance between the
student's home and the ice cream shop?
An ice cream shop is six units away from the student's home.
Just what is distance?Unaffected by direction, distance is an object's overall movement. Distance can be described as the amount of ground that an object has covered, regardless of its starting or ending points.
Student walks = Home to School + School to Soccer field + Soccer field to ice cream shop Student walks = B to C + C to D + D to E
Taken as 1 standard grid unit per city block
B to C = (0,2) (North)
C to D = (-3,0) (West)
D to E = (0,-1) ( South)
Student walks = distance in x + distance in y
Student walks = 6 unit ( 6 city blocks)
In order to get to the ice cream shop from home, the student must walk six units.
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Which of Newton's Laws of Motion is called the Law of Inertia?
Question 1 options:
1st
3rd
2nd pls help
The Newton's first (1st) Law of Motion is called the Law of Inertia.
What is Newton's first law of motion?
Newton's first law of motion states that an object at rest or uniform motion in a straight line will continue in that path unless it is acted upon by an external force.
This law (Newton's first law of motion) is called the law of inertia because it depends on mass of the object.
Inertia is the measure of reluctance of an object to move or resist motion when a force is applied to it.
The more massive an object is, the more inertia it will possess because it will exert a greater resistive force to prevent motion.
Basically, the Newton's first law of motion is all about the difficulty to stop an object in motion or get an object at rest to start moving on its own. The resistive force of the object to prevent motion can be overcame when an external force is applied to the object.
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Researchers investigated the influence of environmental pH on the activity of peroxidase, an enzyme that catalyzes the conversion of hydrogen peroxide to water and oxygen gas. In an experiment, the researchers added a hydrogen peroxide solution containing guaiacol to several identical test tubes and adjusted the solution in each test tube to a different pH . The researchers included the guaiacol because it caused the solutions to change color as the reactions proceeded, which the researchers relied on for measuring reaction rates. Finally, the researchers added the same amount of peroxidase to each test tube and measured the rate of each reaction at 23°C . The results of the experiment are represented in Figure 1.
Based on Figure 1, which of the following statements best predicts the effect that a change from a moderately acidic environment ( pH near 6) to a basic environment will have on peroxidase activity?
answer choices
Peroxidase activity will decrease.
Peroxidase activity will increase.
Peroxidase activity will stay the same.
Peroxidase activity will increase at first and then decrease.
From the given graph, if we change from a moderately acidic environment ( pH near 6) to a basic environment, the peroxidase activity will decrease. Therefore, option (A) is correct.
What is pH?pH can be described as the negative logarithm of hydrogen ion (H⁺) concentration. Mathematically, pH is generally inversely proportional to the concentration of hydrogen ions (H⁺).
pH = -log ([H⁺])
In chemistry, pH is a scale used to determine the acidity or basicity of an aqueous solution. Acidic solutions are calculated to have lower pH values than basic or alkaline solutions.
The pH scale possesses ranges from 0 to 14 while pH 7.0 is neutral. A low pH (about 1 or 2) is acidic and a high pH (12 or 14) is basic.
When we change the moderately acidic environment to a basic environment. We actually increase the pH value in the graph showing the peroxidase activity decreases when pH increases more than 6.
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For the dissolution of HCl in water represented above, which of the following pairs includes the Brønsted-Lowry bases?HCl(aq)+H2O(l)→H3O+(aq)+Cl−(aq)
According to Lowry-Bronsted concept, for dissolution of HCl in water , H₂O acts as a Lowry-Bronsted base as it accepts proton from HCl.
What is Lowry-Bronsted concept?According to Lowry-Bronsted concept, acid can be defined as a substance which donates a proton and forms its conjugate base while base is a substance which accepts a proton and forms its conjugate acid.
Conjugate base which is formed from acid accepts a proton and acid is reformed, while conjugate acid which is generated from base donates a proton and base is regenerated.
The theory involves the transfer of protons between an acid and a base.They are also classified depending on their ability to donate and accept protons .Strong Lowry-Bronsted acid and bases are those which loose and accept protons easily while weak Lowry-Bronsted acids and bases are those which do not loose and accept protons readily.
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The typical dosage of statin drugs for the treatment of high cholesterol is 10 mg. Assuming a total blood volume of 4.5 L, calculate the concentration of drug in the blood in units of % (w/v)
Answer:
1.904 ppm
Explanation:
Concentration of drug in units of ppm = mass of solute / (mass of solution ) × 1000000
mass of blood = density of blood × volume = 1.05 g / ml × 5000 ml = 5250 g
mass of solution = mass of blood + mass of solute ( statin) = 5250 + 0.01 g = 5250.01 g
Concentration of drug in units of ppm = (0.01 g / 5250.01 g) × 1000000 = 1.904 ppm
I hope this helps!!
A constant electric current deposited 365 mg of Ag in 216 minutes from an aqueous Silver trioxonitrate (v). What is the Current?
The electric current is 0.025 A
Electric current refers back to the go with the flow of energy in an electronic circuit and to the amount of strength flowing through a circuit. it's far measured in amperes (A). the bigger the cost in amperes, the more energy is flowing within the circuit.
Ag+ + e¯ →Ag
1F deposits 107.87 g/mol (molecular mass) of silver
1F = 96500 C
Let, 107.87 g/mol needed = 96500 C
Number of coulombs required to deposit 0.3650 g of silver =(96500/107.87) 0.3650
Q = 326.5 C
According to Faraday’s law, Q = I x t
I = 326.5 C / (216 x 60 s) = 0.025 A
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Calculate the molecular formula of a compound with a molar mass of 60.06 g/mol and the following percent composition: 39,9% carbon, 6,7% hydrogen and 53,4% oxygen by mass.
Considering the definition of empirical formula, the molecular formula of a compound with a molar mass of 60.06 g/mol is C₂H₄O₂.
Definition of empirical formulaThe empirical formula is the simplest expression to represent a chemical compound, which indicates the elements that are present and the minimum proportion in whole numbers that exist between its atoms.
Definition of molecular formulaThe molecular formula is the chemical formula that indicates the number and type of distinct atoms present in the molecule. The molecular formula is the actual number of atoms that make up a molecule.
To obtain the molecular formula you must relate the molecular weight (PMc) with the molecular weight of the empirical formula (PMfe):
n= PMc÷ PMfe
Then:
molecular formula= n× empirical formula
Empirical formula in this caseIn this case, assuming a 100 grams sample, the percentages match the grams in the sample. So you have:
Carbon (C): 39.9 gramsHydrogen (H): 6.7 gramsOxygen (O): 53.4 gramsThen it is possible to calculate the number of moles of each atom in the molecule, taking into account the corresponding molar mass:
Carbon (C): 39.9 g÷ 12 g/mole= 3.325 molesHydrogen (H): 6.7 g÷ 1 g/mole= 6.7 molesOxygen (O): 53.4 g÷ 16 g/mole= 3.3375 molesThe empirical formula must be expressed using whole number relationships, for this the numbers of moles are divided by the smallest result of those obtained:
Carbon (C): 3.325 moles÷ 3.325 moles= 1Hydrogen (H): 6.7 moles÷ 3.325 moles= 2.01≅ 2Oxygen (O): 3.3375 moles÷ 3.325= 1Therefore the C: H: O mole ratio is 1: 2: 1
Finally, the empirical formula is C₁H₂O₁= CH₂O.
The molar mass of the empirical formula is 30 g/mole
Molecular formulaThe molecular formula of the compound has a molar mass of 60.06 g/mol. So, the value of n is:
n= PMc÷ PMfe
n= 60.06 g/mole÷ 30 g/mole
n≅ 2
This means that to obtain the molecular formula it is necessary to multiply the number of all the atoms of the empirical formula by 2:
molecular formula= 2× C₁H₂O₁
molecular formula= C₂H₄O₂
Finally, the molecular formula is C₂H₄O₂.
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When making lemonade, you accidentally use twice as much lemonade powder as the directions call for. No matter how much you stir, you cannot get all the powder to dissolve. What is true of the solution you made?
It is a colloid.
It is saturated.
It is an emulsion.
It is supersaturated.
Answer: colloid
Explanation:
A copper penny will sink in molten copper. What can you infer about the difference in distance between the molecules in a copper penny and in molten copper?
The molecules in a copper penny is closely packed and and has no space to move apart thus the material will be denser than that in the molten state. That's why the penny sink in the molten copper.
What is molten copper?Copper is a transition metal exhibiting all the metallic properties. The molten state of metals is the fluid state where the molecule are not strongly held by the metallic bonds.
Molten material is made by melting them and the liquid like state contains molecules with some space to move apart. Whereas, in solid state as in a copper penny, the molecules are closely packed and have no space to move apart.
An object will sink in a liquid if it is less dense than the liquid. Copper penny is denser than the molten copper because the molecules are densely packed and it will sink on to it.
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ClCH2 has a molar mass of 96.94g/mol determine its molecular formula
If the compound ClCH2 has a molar mass of 96.94 g/mol then its molecular formula is Cl2C2H4.
Empirical formula of molar mass
= mass of Cl + mass of C + 2 (mass of H)
= 35.45 + 12.00 + 2 (1.008)
=49.46 g/mol
The formula for determining empirical unit is
= molar mass of the compound / empirical formula of molar mass
= ( 96.94 g/mol ) / ( 49.46 g/mol )
= 1.959
= 2
So we can conclude that, the molecular unit is made up of two empirical units, hence the molecular formula is as following : Cl2C2H4.
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Grade 8 practice sheet "Vocabulary of Chemical Equations" | Easy
The information about the chemical reaction as given by the chemical equation is given below:
Word equation: Aluminum metal + oxygen gas ---> Aluminum oxideReactants: Aluminum metal and oxygen gasProducts: Aluminum oxideKnown states of matter: Aluminum metal is solid; oxygen is a gas; Aluminum oxide is a solidChemical Equation: 4 Al (s) + 3 O₂ (g) ---> 2 Al₂O₃ (s)What are chemical equations?Chemical equations are equations that represent chemical reactions that occur in a given system.
Chemical equations use symbols to represent the reactants and the products of a reaction.
The symbols used in chemical equations are the symbols of the elements or compounds involved in the chemical reaction.
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how many of n2 does 29.32 L represent
Consider the N ₂ gas is taken at STP then one mole of nitrogen gas will contains 22.4 L. Then 29.32 L of N ₂ contains 1.33 moles of the gas.
What is molar volume?The volume of a substances occupied by one mole of that substance is called its molar volume. The temperature of 298 K and a pressure of 1 atm is called standard condition of temperature and pressure commonly known as STP.
At STP one mole of any element, molecule or compound contains 22.414 L. Consider the nitrogen gas is taken at STP, then one mole of N ₂ contains 22.41 L. Therefore, number of moles of N ₂ having a volume of 29.32 L is :
29.32 L/ (22.4l L/mol) = 1.33 moles.
Therefore, 29.32 L of N ₂ contains 1.33 moles of the N ₂ gas.
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Question is in picture below!
The structure in option 5 is the compound that is a base in aqueous solution according to Bronsted-Lowry theory.
What are Bronsted-Lowry base and acid?The Bronsted-Lowry theory of acid and base is an acid-base reaction theory, introduced by a chemist called Johannes Bronsted in 1923.
According to Bronsted-Lowry theory, an acid is a substance which donates an hydrogen ion or a proton and forms its conjugate base and the base is a substance which accepts an hydrogen ion or a proton and forms its conjugate acid.
Based on the options in this question, the fifth option is a correct representation of Bronsted-Lowry base because it seemed to have accepted a proton.
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A weak electrolyte that produces H+ in solution is a
According to the Arrhenius concept a weak electrolyte that produces H+ ions in solution is an acid. Weak electrolytes poorly conducts.
What is an electrolyte?An electrolyte is a molten solution containing mobile ions. For example ZnCl₂, NaCl are electrolytes containing their mobile ions. The mobility and conductivity of the ions depends on the concentration and size of the ions.
There are various concepts defining acids and bases. Th earlier concept to defines acids and bases was Arrhenius concept. As per this concept the acids are substances which furnish H+ ions into the solution whereas, bases are substances giving OH- ions in the solution.
Therefore, a weak electrolyte giving H+ ions in solution is an acid. More over weak electrolytes does not conduct as strong electrolytes.
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electron configuration for the elements that are identified by these atomic numbers
a. Atomic number 16 is Sulfur its electronic configuration is:
1s2 2s2 2p6 3s2 3p4
b. Atomic number 11 is Sodium its electronic configuration is:
1s2 2s2 2p6 3s1
c. Atomic number 32 is Germanium its electronic configuration is :
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p2
d. Atomic number 47 is Silver its electronic configuration is :
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s1
e. Atomic number is 12 Magnesium its electronic configuration is :
1s2 2s2 2p6 3s2
f. Atomic number 28 is Nickel its electronic configuration is :
1s2 2s2 2p6 3s2 3p6 4s2 3d8
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How many molecules are in 24 grams of ozone (03)
Answer:48
Explanation:
Answer: 3. 0.125 X 10”23 molecules
Explanation:
What is complete analysis
Answer:Listwise deletion
Explanation:
How much heat is required to melt 15.0 grams of ice at 0.0º C?
The amount of heat required to melt 15.0 grams of ice at 0.0º C is 4950 J.
What is the amount of heat required to melt 15.0 grams of ice at 0.0º C?The amount of heat required to melt 15.0 grams of ice at 0.0º C is calculated from the formula given below:
Amount of heat = mass * latent heat of fusion of ice
The latent heat of fusion is the amount of heat required to convert a unit mass of ice at 0.0º C to water at 0.0º C
The latent heat of fusion of ice is 330J/g
mass of ice = 15.0 g
Amount of heat required = 15.0 g * 330 J/g
Amount of heat required = 4950 J
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A substance has a molar mass of 60 g/mol with 40.0 percent carbon, 6.7 percent hydrogen, and 53.3 percent oxygen. What is its empirical formula? 1. C3H3O2 2. CHO 3. C2H4O2 4. C2H2O3 5. CH2O 6. C2HO 7. C3H2O2 8. CHO2 9. C2H3O2
The empirical formula for the given compound is CH₂O. Therefore, option (5) is correct.
What is the empirical formula?The empirical formula of a compound gives the simplest ratio of the number of different elements present in a compound. The molecular formula can be defined as a multiple of the empirical formula of a compound.
Given, the percent of carbon = 40 % = 40 g
The percent of hydrogen = 6.7 % = 6.7 g
The percent of oxygen = 53.3 % = 53.3 g
The moles of the carbon = 40/12 = 3.33
The moles of hydrogen = 6.7/1 = 6.7
The moles of oxygen = 53.3/16 = 3.33
The ratio of C: H:O can be written as 3.33: 6.7: 3.33
The simplest ratio can be 1 : 2 : 1
Therefore, the empirical formula of the given compound is CH₂O.
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Research Question - do powdery substances dissolve in water?
The experiment involves using 3 glass jugs, filled with water. An equal amount of sugar will be placed into Jar 1, an equal amount of salt into Jar 2, and an equal amount of flour in Jar 3. The experiment involves seeing whether powdery substances dissolve in water.
Find independent and Dependant Variables
Please I really need help!
It depends on the powdery substances that is been dissolved hence it can be insoluble or partially soluble in water.
The Independent is the powdery substances .The Dependent Variables is the solvent: Water.Can you dissolve powder in water?To make any granules into useful cleaners, it must first be dissolved in water. But not all powdered raw materials easily dissolve into water, therefore it could take some time to combine them together to get a solution. For a powdered substance, builders must be used for the majority of the cleaning.
Therefore, Powders, which are tiny solids, are frequently only weakly or completely soluble in water. Powder insoluble levels in water rely on a variety of controllable elements, including temperature, humidity, and particle size.
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A 1.90 g sample of elemental sodium, Na(s) is reacted with water, yielding sodium
hydroxide, NaOH, and hydrogen. 2Na(s) + 2H2O(l)→ 2NaOH(aq) + H2(g); The H2(g) is collected
over water at 18 oC. What are the partial pressures of the two gases (hydrogen and water
vapor) when contained in a 1.00 l container at 25
oC? What is the total pressure?
The partial pressure of hydrogen is 0.98 atm while the partial pressure of water is 0.02 atm. The total pressure of the system is 1 atm.
What is the pressure?We have seen the reaction as it has been shown in the equation that is attached to the question above. Now, we must have to find the number of moles of the hydrogen that was obtained.
Number of moles of sodium = 1.90 g/23 g/mol = 0.08 moles
2 moles of sodium produces 1 mole of hydrogen
0.08 moles of sodium would produce 0.08 moles * 1 mole/ 2 moles
= 0.04 moles
Given that;
P = pressure
V = volume
n = Number of moles
R = gas constant
T = temperature
PV = nRT
P = nRT/V
P = 0.04 * 0.082 * 298/1
P = 0.98 atm
The partial pressure of the hydrogen = 0.98 atm
The partial pressure of the water = SVP of water at 18°C = 0.02 atm
Total pressure of the system = 0.98 atm + 0.02 atm = 1 atm
The system has a total pressure of 1 atm.
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which of the compounds can in principle be isolated in optically active form at room temperature? select all valid choices.
The compounds that can in principle be isolated in an optically active form at room temperature are:
2-pentanol compound; option BCarbohydrates; option CWhat are compounds?
A compound is described as a material formed by chemically bonding two or more chemical elements.
The 2-pentanol compound is said to be optically active because it has one asymmetric carbon atom, namely the C atom which binds 4 different groups.
optically active compounds are described as compounds that can rotate the plane of polarization. A compound is optically active if it has asymmetric C or chiral C atoms. Asymmetric C atoms are C atoms that are bonded to four different elements or molecules.
In conclusion, Because not all compounds that have chiral atoms are optical, hence if the atom has a plane of symmetry or a plane that can be folded in half with the same side, it means that it is not an optical compound.
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Which of the compounds can in principle be isolated in an optically active form at room temperature? select all valid choices.
Complete question:
a. is-1,4-dimethyl cyclohexane
b. 2-pentanol compound
c. Carbohydrates
d. trans-1,3-dimethyl cyclohexane
e. 1,1-dimethyl cyclohexane
Please help, I’ll mark your answer as brainliest.
The balanced equation is (NH₄)₂Se + 3HCL = 3NH₄Cl + H₂Se - displacement reaction.
A chemical equation is the symbolic representation of a chemical reaction within the shape of symbols and chemical formulas. A balanced chemical equation is an equation in which the quantity of atoms of each type within the reaction is the same on each reactant and product aspect. The mass, as well as the trade, are equal in a balanced chemical equation.
The worldwide stability equations (additionally referred to as full balance equations) are fixed equations that characterize the equilibrium distribution (or any desk-bound distribution) of a Markov chain, whilst any such distribution exists.
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When two compounds or molecules react together to form new substances what are they called?
Answer: synthesis reaction.
Explanation:
When two or more substances (element or compounds) react together to combine and form a new product, which is a compound with new properties. They synthesize to form a new substance, hence it is called a synthesis reaction.
4. how much energy, in KJ per mole, is released when an electron makes a transition from n=5 to n=2 in an hydrogen atom? is this energy sufficient to break the H-H bond. (436 KJ/mole is needed to break this bond )?
Answer:
252.459 KJ/mol & no, that is not sufficient to break H-H bond.
Explanation:
Calculate wavelength from the equation
[tex]\frac{1}{\lambda} = Rh(\frac{1}{n_{1}^{2} } -\frac{1}{n_{2}^{2} } )[/tex] where n1 = 2 n2 = 5 Rh = 1.097X10^7 m^(-1)
λ = 4.34X10^-7 m
Now calculate E using
[tex]E = \frac{hc}{\lambda}[/tex] where E = Energy h = Plank's constant c = velocity of light (3X10^8 m/s)
E = 4.194X10^-19 J
now to convert Joules to Joule/mol we need to multiply the energy by avogadro's number which is 6.023X10^23
E = 252458.9873 J/mol
Dividing this amount by 1000 would yield energy in KJ/mol
E = 252.46 KJ/mol
252.46<436 KJ/mol
Thus H-H bond can't be broken by this energy
how many moles of NaOH in 125.0 mL of 0.190M NaOH?
Answer:
0.0238 moles NaOH
Explanation:
To find the amount of moles, you need to
(1) convert the volume from mL to L (1,000 mL = 1 L)
(2) calculate the amount of moles (using the molarity equation)
It is important to arrange the conversions in a way that allows for the cancellation of units. The final answer should have 3 sig figs.
125.0 mL NaOH 1 L
--------------------------- x --------------------- = 0.1250 L NaOH
1,000 mL
Molarity = moles / volume (L) <----- Molarity equation
0.190 M = moles / 0.1250 L <----- Insert values
0.0238 = moles <----- Multiply both sides by 0.1250
