Answer:
a phosphatidylcholine
The molecule that contains sphingosine is a phosphatidylcholine compound.
What is a compound?
Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.
Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:
1)Molecular compounds where in atoms are joined by covalent bonds.
2) ionic compounds where atoms are joined by ionic bond.
3)Inter-metallic compounds where atoms are held by metallic bonds
4) co-ordination complexes where atoms are held by co-ordinate bonds.
They have a unique chemical structure held together by chemical bonds Compounds have different properties as those of elements because when a compound is formed the properties of the substance are totally altered.
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Consider the reaction shown.
4 HCl(g) + O₂(g) → 2Cl₂(g) + 2 H₂O(g)
Calculate the number of grams of Cl2, formed when 0.125 mol HCl reacts with an excess of 0₂.
mass:
Answer:
4.43 g Cl₂
Explanation:
To find the mass of Cl₂, you need to (1) convert moles HCl to moles Cl₂ (via the mole-to-mole ratio from equation coefficients) and then (2) convert moles Cl₂ to grams (via the molar mass). It is important to arrange the conversions/ratios in a way that allows for the cancellation of units. The final answer should have 3 significant figures like the given value.
4 HCl(g) + O₂(g) -----> 2 Cl₂(g) + 2 H₂O(g)
^ ^
Molar Mass (Cl₂): 2(35.453 g/mol)
Molar Mass (Cl₂): 70.906 g/mol
0.125 moles HCl 2 moles Cl₂ 70.906 g
-------------------------- x ---------------------- x ------------------- = 4.43 g Cl₂
4 moles HCl 1 mole
Identify the most likely reaction product(s) in the monobromination of 2-pentanone by bromine in the presence of acid in the dark
The most likely reaction product in the monobromination of 2-pentanone by bromine in the presence of acid in the dark is known to be 1-Bromo-2-pentanone
What is a Monobromination?The term is known to be the bringing in of one bromine atom into what we call an organic compound.
Note that the brominating of benzene is known to be a good example of what we know as electrophilic aromatic substitution reaction. In this kind of reaction, the electrophile (which is bromine) is said to forms a kind of sigma bond to that of the benzene ring, bringing in an intermediate. Then, a proton is said to be deleted from the intermediate to create a substituted of benzene ring.
Hence, The most likely reaction product in the monobromination of 2-pentanone by bromine in the presence of acid in the dark is known to be 1-Bromo-2-pentanone
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See full question below
Identify the most likely reaction product(s) in the monobromination of 2-pentanone by bromine in the presence of acid in the dark.
a.) 1-Bromo-2-pentanone and 3-bromo-2-pentanone
b.) 1-Bromo-2-pentanone, 3-bromo-2-pentanone, and 4-bromo-2-pentanone
c.) 1-Bromo-2-pentanone, 3-bromo-2-pentanone, 4-bromo-2-pentanone, and 5-bromo-2-pentanone
d.) 3-Bromo-2-pentanone
e.)1-Bromo-2-pentanone
When the reactants have less enthalpy than the products, then __________. A. heat energy is given out B. None of these C. heat energy is absorbed D. the reaction will be complete
When the reactants have less enthalpy than the products, then heat energy is given out. That is option A.
What is exothermic reaction?An exothermic reaction is a type of reaction in which the energy level of the reactants are higher than that of the product.
It is this discrepancy in the energy levels of both the reactants and products would lead to the generation and release of energy into the surrounding environment.
The enthalpy of exothermic reaction is gotten by the difference between the energy needed to break the bonds of reactants and the energy needed for the formation of products.
Therefore,when the reactants have less enthalpy than the products, then heat energy is given out.
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Please Help!
9/4Be + 4/2He = 12/6c + ?
a. 1/0n
b. 0/1e
c. 0/1H
d. 2/1H
Answer:
(1/0)n
See attached explanation.
Nacl has a delta.hfus = 30.2 kj/mol. what is the mass of a sample of nacl that needs 732.6 kj of heat to melt completely? use q equals n delta h.. 24.3 g 82.7 g 1,407.1 g 1,417.7 g
The correct value is 1417.7 grams.
The mass of a sample of Nacl that needs 732.6 kj of heat to melt completely is 1417.7 grams.
What is Enthalpy of fusion?Enthalpy of fusion is the quantity of heat energy needed to turn a unit mass of the a solid now at melting point into such a liquids without raising the temperature.
Some key point for enthalpy of fusion of melting ice are-
The quantity of heat energy required to convert solid stuff into liquid is known as the heat of fusion (melting.)Q = mHf is the formula for calculating heat of fusion.The temperature is not a part of the equation or the computation because matter does not truly change temperature when it changes states.The fusion heat is usually a positive value, with the exception of when melting heliumCalculation for the heat required-
Nacl has a delta.hfus = 30.2 kj/mol => [tex]\Delta H_{\text {fusion }}=30.2 \mathrm{~kJ} / \mathrm{mol}[/tex]
As a result, the enthalpy of fusion for 1 mole of sample NaCl is 30.2 kJ.
Additionally, the mass of 1 mole for NaCl is 58.44 grams.
For a quantity of 58.44 grams of NaCl, 30.2 kJ of heat are required.
Consequently, 732.6 kJ heat will be required for;
[tex]\frac{58.44 g}{30.2 k J} \times 732.6 k J=1417.65 \approx 1417.7[/tex] grams of NaCl.
Therefore, the mass of a sample of Nacl that needs 732.6 kj of heat to melt completely is 1417.7 grams of NaCl.
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Which substance is a product of glycolysis, a precursor of gluconeogenesis and a precursor of the citric acid cycle?
Pyruvate substance is a product of glycolysis, a precursor of gluconeogenesis and a precursor of the citric acid cycle
A crucial node in the network of metabolic pathways is pyruvate. Pyruvate can be transformed into ethanol, the amino acid alanine, fatty acids or energy through acetyl-CoA, carbohydrates through gluconeogenesis, and fatty acids or energy. As a result, it combines numerous important metabolic activities.
Pyruvate's main job is to carry carbon atoms into the mitochondrion where they are fully oxidized into carbon dioxide.
The final byproduct of glycolysis, pyruvate, is crucial to cell metabolism. It is made in the cytosol and then oxidized in the mitochondria, where it activates oxidative phosphorylation and feeds the citric acid cycle.
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A piston-cylinder device contains helium gas, during a reversible, isothermal process the entropy of the helium will __________ increase.
A piston-cylinder device contains helium gas, during a reversible, isothermal process the entropy of the helium will sometimes increase.
As entropy of an ideal gas depends on pressure and temperature . Hence , entropy change during isothermal process if pressure changes . Enropy changes whenever there is a transfer of heat . The change in entropy is the heat added divided by the temperature at which the transfer took place .
A piston-cylinder is a moving device that is made tight by the piston rings. It moves inside in a cylinder in the form of liquid and later expands and then contracts.
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What are the differences between grasses and legumes? advantages and disadvantages of each
The differences between grasses and legumes are,
The grasses tend to have more digestible fiber than legume plants.Legumes have more protein , energy and micronutrient due to their abundant leaves as compare to grasses.The nutrient composition is an obvious and major difference between the two plants.The advantage and disadvantage of grasses are given below.
Advantage:
Grasses helps to keep air clean, trap carbon dioxide , reduce erosion from storm water runoff , improve soil , decreases noise pollution and reduce temperature.
Disadvantage:
It is necessary to cut grasses regularly.Sometime grasses harmful to the environment . Likewise rainwater runoff from lawns can carry pesticides and fertilizer into river , lake ,streams and ocean via the sewer system.The advantage and disadvantage of legumes are given below.
Advantage:
The legumes supply nutrients essential to our body which supports our health.Disadvantage:
It lower persistence than grass under grazing It has high risk of livestock bloat It is difficult to conserve as silage or hay.learn about legumes
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A 1. 7 m solution of the acid ha has a ph of 1. 0. what is the ka of the acid? the equation described by the ka value is ha(aq) h2o(l)⇌a−(aq) h3o (aq)
A 1. 7 m solution of the acid ha has a ph of 1. 0, then the ka of the acid is 6.25×10^(-3).
What is acid dissociation constant?The acid dissociation constant is defined as the value which is used to measure the strength of the specific acid in the solution.
Equation for general dissociation of strong or weak acid is
HA ----- (H+) + ( A-)
Ka can be expressed as
Ka = [H+] [A-]/[HA]
where [H+] is the concentration of H+ ions
Now, we will find the value of concentration of H+ ions
pH = -log [H+]
1 = -log[H+]
[H+] = antilog(-1)
[H+] = 0.1
By using ICE table, we find that the concentration of [HA] is
1.7-0.1
= 1.6
By substituting all the values we get,
Ka = 0.1 × 0.1/1.6
= 6.25×10^(-3)
Thus, we find that the Ka value of the given solution is 6.25×10^(-3).
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How many grams of agcl would be needed to make a 4. 0 m solution with a volume of 0. 75 l?
430 g of AgCl would be needed to make a 4.0m solution with a volume of 0.75 L.
What is Molarity?The amount of a substance in a specific volume of solution is known as its molarity (M). The number of moles of a solute per liter of a solution is known as molarity.Calculation of Required amount of AgClRemember that mol/L is the unit of molarity (M).
We can compute the necessary number of moles of solute by multiplying the concentration by the liters of solution, according to dimensional analysis.
0.75L×4.0M=3.0mol
Then, using the periodic table's molar mass for AgCl, convert from moles to grams:
3.0mol×143.321gmol=429.963g
The final step is to round to the correct significant figure, which in this case is two: 430g.
Hence, 430 g of AgCl would be needed to make a 4.0m solution with a volume of 0.75 L.
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Which of the following statements statements expresses the following chemical equation with words?
2 K(s) + Cl₂(g) →> 2 KCI(S)
->
Select one:
O a. Four atoms of krypton react with two molecules of Cl₂
O b. Two atoms of potassium react with one molecule of chlorine to produce two molecules of potassium chloride.
O c. One atom of chromium reacts with 1 molecule of calcium to produce 1 molecule of chromium calcide.
O d. Two atoms of potassium react with potassium chloride to produce chlorine gas.
Answer:
option b is the answer of given statementtwo atoms of potassium react with one molecule of chlorine to produce two molecules of potassium chloride
2CO(g) + O2(g) = 2CO2(g)
If 6.0 L of CO reacts at STP, how many liters of oxygen are required for the reaction?
Answer:
3.0 L O₂
Explanation:
If CO reacts at STP, it means that there are 1.0 moles of CO. To find the moles of O₂, you need to use the mole-to-mole ratio from the given equation.
1.0 moles CO 1 mole O₂
---------------------- x --------------------- = 0.5 moles O₂
2 moles CO
To calculate the liters of oxygen, you need to use Avogadro's Law:
V₁ / N₁ = V₂ / N₂
In this equation, "V₁" and "N₁" represent the volume and moles of the first molecule. "V₂" and "N₂" represent the volume and moles of the second molecule. You can plug the given and calculated values into the equation and simplify to isolate V₂.
V₁ = 6.0 L V₂ = ? L
N₁ = 1.0 moles N₂ = 0.5 moles
V₁ / N₁ = V₂ / N₂ <----- Avogadro's Law
(6.0 L) / (1.0 moles) = V₂ / (0.5 moles) <----- Insert values
6.0 = V₂ / (0.5 moles) <----- Simplify left side
3.0 = V₂ <----- Multiply both sides by 0.5
**I am not 100% confident on this answer. Please let me know if it is incorrect**
Answer:
2CO(g) + O2(g) → 2CO2(g)
If 9.0 L of O2 react at STP, how
many moles of CO2 form during the
reaction?
[?] mol CO2
Explanation:
What would it be if it was 9.0?
How are air temperature and humidity related? 1 colder air can hold more water vapor than warmer air. 2 warmer air and colder air can hold the same amount of water vapor. 3 warmer air can move faster than colder air. 4 warmer air can hold more water vapor than colder air.
Warmer air can hold more water vapor than colder air.
Weather is the atmospheric conditions of a specific area over a short period of time.Precipitation, wind, temperature, atmospheric pressure, relative humidity, cloud, and wind speed are all weather elements.Temperature is a measurement of the degree of coldness or hotness of a physical object (body).Humidity, on the other hand, refers to the concentration (amount) of water vapor in the air. It is high when there is a lot of water vapor in the air and low when there is little water vapor.How can humidity levels affect your home's temperature?Your home's windows are fogged with condensation. A musty odor can be detected in the air inside your home. When you breathe in, you can feel the moisture in the air. These indicators indicate that you should act quickly. Moisture levels in your home raise the overall temperature and make it feel hot.
What is Absolute Humidity & Relative Humidity?Humidity is classified into two types: absolute and relative.
The former describes the humidity present in a parcel of air without taking temperature into account, whereas the latter describes the humidity present in the air while taking temperature into account. The former defines the amount of water content by dividing the parcel's weight by its volume, whereas the latter is calculated by dividing the amount of water content present by the total capacity of the parcel of air to hold multiplied by 100. The former decreases with height, whereas the latter becomes saturated when it reaches 100%.
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The heat of fusion (δhfus) of benzene (c6h6) is 10. 0kjmol while its heat of vaporization (δhvap) is 34. 1kjmol. estimate the enthalpy of sublimation (δhsub) of benzene.
The heat of fusion (δhfus) of benzene (c6h6) is 10. 0kjmol while its heat of vaporization (δhvap) is 34. 1kjmol then enthalpy of sublimation (δhsub) of benzene is 44.1 kJ mol.
The heat of fusion is amount of heat involved during conversion of solid into liquid.
Solid → liquid
The heat of vaporization is amount of heat involved during conversion of liquid into vapor.
liquid → vapor
The enthalpy of sublimation is amount of energy involved during conversion of solid into vapor.
Solid → vapor
The enthalpy of sublimation is equal to sum of heat of fusion and heat of vaporization .
Mathematically, heat of sublimation = heat of fusion + heat of vaporization .
heat of sublimation = 10. 0 kJmol + 34. 1 kJmol. = 44.1 kJ mol
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What is the optimum ph of a sodium formate/formic acid buffer? (for formic acid, ka = 1. 7 × 10–4. )
The optimum pH of formic acid - formate buffer is 3.75
What is pH? pH is a measure of how acidic/basic water is. The range goes from 0 - 14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base. pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the water.What is Buffer ?
A substance or a solution which resists any changes in pH, when acid or alkali is added to it.
pH = pKa + log[base] / [acid]
Considering equimolar concentration of acid and base
pH = 3.75 + log(x)/(x)
pH = 3.75 + log (1)
pH = 3.75 + 0
pH = 3.75
Hence,
The optimum pH of formic acid - formate buffer is 3.75
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What is the kinetic product obtained from the addition of 1 mole of bromine to 1,3-butadiene?
From the addition of 1 equivalent of HBr to 1,3-butadiene, 3-bromo-1-butene is obtained as a product.
What is moles?
Moles are defined as the smallest base unit that is equivalent to [tex]6.02214 X 10^{23}[/tex] units.
Moles are chemical entities, which are used to measure the mass or molecular mass of the compound, molecule, or atom. The moles are, for example can be explained as equal to the mass of the atom. For example, there is one mole in 12 grams of carboncarbon.
Thus the kinetic product formed is 3-bromo-1-butene.
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Explain why when an ion is formed, the mass of the atom does not change.
Answer:
Atoms are made up of protons, neutrons, and electrons. The mass of an atom is determined by the total number of neutrons and protons in the nucleus. The difference between an atom and an ion is the number of electrons. The change of electrons does not change the mass because electrons have a negligible mass. In other words, the mass of electrons is so small, it is considered insignificant.
Think critically...
Q7. Bridges are made from materials that contract and expand as the temperature changes, so
they cannot be fastened firmly to the bank of a river or lake. The photographs below show an
expansion joint at the end of a bridge in winter and in summer.
www
(A)
(B)
Which season is shown in each picture? Explain how you know?
The season that is shown in the picture attached is that:
For the red - summer For the black - winterWhat is the season about?Metals are known to often expand due to different factor. For example, the rails of a railway are known to often expand in summer and they tend to contract in winter. This tend to make the gaps kept to be between successive rails and it is one that allow for expansion.
Note also that in Summer the expansion joint will tend to have little space as the two sides of the bridge is said to expand because of the heat and in terms of winter, it contract and there are bigger space as they tend to contract in the cold.
Hence, The season that is shown in the picture attached is that:
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How many different products can be formed from a poorly planned crossed aldol addition?
a. 1
b. 2
c. 3
d. 4
e. 5
There are 4 different products will be formed from a poorly planned crossed aldol addition.
In a crossed aldol condensation, two distinct ketone and aldehyde reactants are used. Due to the possibility of several enolate nucleophiles as well as multiple carbonyl electrophiles, similar reactions typically result in a variety of distinct condensation products.
Ethanol and propanol undergo cross-aldol condensation, which results in two products:
one where ethanol serves as an enolate ion and the other where propanol serves as an enolate ion. 2-Methylbut-2-enal and Pent-2-enal are just the two cross-aldol derivatives.Therefore, the correct answer will be option (d)
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There are four different products can be formed from a poorly planned crossed aldol addition.
So the correct option is D
Two distinct ketone and aldehyde reactants are used in a crossed condensation reaction. Due to presence of distinct ketone and aldehyde reactants there are possibility of formation of several enolate ion nucleophiles as well as multiple carbonyl electrophile .
Example : Ethanal and propanone undergoes cross-aldol condensation reaction and give results in two products.
First case: ethanal acts as enolate ion
Second case: propanone acts as enolate ion
Third case: when self condensation is also a product.
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The sp of pbbr2 is 6. 60×10−6. what is the molar solubility of pbbr2 in pure water?
Ksp of PbBr₂ is 6.60 × 10⁻⁶. The molar solubility of PbBr₂ in pure water is 0.0118M.
Ksp or Solubility Product Constant is an equilibrium constant for the dissociation in an aqueous solution.
Molar solubility (S) is the concentration of the dissolved substance in a solution that is saturated.
Let the molar solubility be S upon dissociation.
PbBr₂ or Lead Bromide dissociates in pure water as follows:
PbBr₂ ----------> Pb⁺² + Br⁻
S 2S
Ksp = [Pb⁺²] [ Br⁻]
Ksp = (S) (2S)²
Ksp = 4S³
6.60 × 10⁻⁶ = 4S³
S = 0.0118M
Hence, the Molar solubility S is 0.0118M.
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Aluminum sulfate reacts with barium iodide to produce aluminum iodide and barium sulfate
Al₂(SO₄)₃ + 3BaI₂ → 2AlI₃ + 3BaSO₄
Write the empirical formula for at least four ionic compounds that could be formed from the following ions:
Answer:
Fe(C₂H₃O₂)₃, Fe(CN)₃, Pb(C₂H₃O₂)₄, Pb(CN)₄
Explanation:
Cations (positively charged ions) can only form ionic bonds with anions (negatively charged ions). However, you can't just simply put one cation and one anion together to form a compound. Each compound needs to been neutral, or have an overall charge of 0. When cations and anions do not have charges that perfectly cancel, you need to modify the amount of each ion in the compound.
1.) Fe(C₂H₃O₂)₃
-----> Fe³⁺ and C₂H₃O₂⁻
-----> +3 + (-1) + (-1) + (-1) = 0
2.) Fe(CN)₃
-----> Fe³⁺ and CN⁻
-----> +3 + (-1) + (-1) + (-1) = 0
3.) Pb(C₂H₃O₂)₄
-----> Pb⁴⁺ and C₂H₃O₂⁻
-----> +4 + (-1) + (-1) + (-1) + (-1) = 0
4.) Pb(CN)₄
-----> Pb⁴⁺ and CN⁻
-----> +4 + (-1) + (-1) + (-1) + (-1) = 0
A 400. 0 g sample of liquid water is at 30. 0 ºc. how many joules of energy are required to raise the temperature of the water to 45. 0 ºc?
Energy required to raise the temperature from 35°C - 45 °C= 25116 J.
specific heat, the quantity of warmth required to raise the temperature of one gram of a substance by means of one Celsius degree. The units of precise warmth are generally energy or joules consistent with gram according to Celsius diploma. for instance, the unique warmth of water is 1 calorie (or 4.186 joules) according to gram in step with Celsius degree.
solving,
Sample of liquid = 400. 0 g
temperature = 30. 0 ºc
joules of energy are required to raise the temperature of the water to 45. 0 ºc
therefore rise in temperature 45 - 30 = 15°C
Specific heat capacity = 4.186 J/g m °C
In kelvin = 273 + 15 = 288
= ∴ energy required = Q = m s ( t final - t initial)
= 400*4.186 * 15
= 25116 joule
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A mixture of 10. 0 g of Ne and 10. 0 g ar have a total pressure of 1. 6 atm. What is the partial pressure of Ne?
Answer:
1.1 atm
Explanation:
moles of neon = 10.0g /20.2g/mole =.495 mole
moles of ar = 10.0 g /39.9 g/mole= .251 mole
the partial pressure of each is determined by their mole fractions of the entire mix
Ne .495 mole / (.495 + .251 mole) * 1.6 atm =
1.1 atm ( to two significant figures)
How many molecules are in 1.75 mol of CHCl3
Answer:
1.0535×10(exponent24)
Explanation:
N (number of molecules)
n(number of moles)
L( Avogadro's constant )
N=n×L
N=1.75×6.02×10(exponent 23)
Explanation:
In one mole we always have:
1 mol = 6.02 X 10²³ molecules
So emulates simple rule of 3 we will have;
1 mol ----------> 6.02 X 10²³
1.75 moles ----> X
X = 1.0535 X 10²⁴ molecules
Hope this helps, Good studies!
Determine the [oh−] , ph, and poh of a solution with a [h ] of 7. 2×10−8 m at 25 °c
The pH= 7.57 , pOH = 6.86, and [OH-] = 1.58 x 10⁻⁴ M M of the given solution.
What is pH?pH is a scale that measures the acidity and basicity of a solution. Its ranges from 1 to 14. Seven is neutral.
The H given is 7. 2 × 10⁻⁸ m
Calculating the pOH
[H⁺] = 10^(-7.20)
[H⁺] = 6.31 x 10⁻⁹ M
pOH = 14 - 7.2
pOH = 6.8
Calculating the [oh−]
[OH⁻] = 1 x 10⁻¹⁴ / 6.31 x 10⁻⁹
[OH⁻] = 1.58 x 10⁻⁴ M
Calculating the pH
pH = 14 - 6.43
pH = 7.57
Thus, the pH= 7.57 , pOH = 6.86, and [OH-] = 1.58 x 10⁻⁴ M.
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Calculate the ph of a solution formed by mixing 250. 0 ml of 0. 15 m nh4cl with 200. 0 ml of 0. 12 m nh3. the kb for nh3 is 1. 8 × 10-5.
i. 9. 45
ii. 4. 74
iii. 9. 06
iv. 04. 55
v. 9. 26
The potential of the hydrogen in water gives the pH of the acidity and basicity of the solution. The pH of the solution is 9.06. Thus, option iii is correct.
What is pH?The pH of a substance is given by the subtraction of the pOH from 14 which is the range of the pH scale.
The dissociation reaction for ammonia is given as,
NH₃ (aq) + H₂O (l) ⇄ NH₄⁺ (aq) + OH⁻ (aq)
Here, the concentration of ammonia is [NH₃] - x, ammonium ion is [NH₄⁺] + x, and hydroxide ion is x.
The molar concentration of ammonia is,
M = (0.12 M × 0.2 L) ÷ 0.45 L = 0.053 M
The molar concentration of ammonium ion is,
M = (0.15 M × 0.25 L) ÷ 0.45 L = 0.083 M
From the base dissociation constant and previous concentration from the reaction, the value of x or hydroxide ion is calculated as,
Kb = [NH₄⁺][OH⁻] ÷ [NH₃]
1.8 × 10⁻⁵ (0.053 - x) - (0.083 + x) × x = 0
x = [OH⁻] = 1.15 x 10⁻⁵
The pH from the hydroxide ion is calculated as,
pOH = - log [OH⁻]
= - log (1.15 x 10⁻⁵)
= 4.94
Further,
pH = 14 - pOH
= 14 - 4.94
= 9.06
Therefore, option iii. 9.06 is the pH of the solution.
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When hydrochloric acid reacts with magnesium metal, hydro- gen gas and aqueous magnesium chloride are produced. what volume of 5.0 m hcl is required to react completely with 3.00 g of magnesium?
The volume of 5.0 m hcl is required to react completely with 3.00 g of magnesium is 20 L.
Chemical equation:Mg + 2HCl -----MgCl2 + H2
Given,
Molar mass of Mg = 24g/mol
Mole = Given mass/ Molar mass
Mole= 3/24
= 0.125 mol
From the given equation we get to know that
Mol ratio of Mg and HCl is 1:2.
Therefore,
mol of HCl = (2/1) × mol of Mg
=2× 0.125
= 0.25
Molarity = m× V
= M/m
= 5/0.25
= 20L
Thus, we find that the volume of 5.0 m hcl is required to react completely with 3.00 g of magnesium is 20 L.
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10.0 grams of argon and 20.0 grams of neon are placed in a 1040.0 ml container at 31.5 °c. the partial pressure of neon is ________ atm.
The partial pressure of neon is 24.0498 atm.
To calculate the partial pressure of neon, we can use the ideal gas equation,
PV = nRT
Pne = nRT / V
Number of moles of neon = Mass of neon / Mass of one mole of neon
n = 20 / 20
n = 1 mole
R = 0.0821 L atm K-1 mol-1
T = 31.5 °C
T = 273.15 + 31.5
= 304.65 K
V = 1040.0ml
Pne = 1 * 0.0821 * 304.65 / 1040.0 * 10-3
Pne = 24.0498 atm
The partial pressure of neon is 24.0498 atm.
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Which does not apply to dihydroxyacetone?
a. ketose
b. triose
c. chiral
d. water-soluble