Which compound contains a chiral carbon atom? 3-chloropentane 2-bromopropane 3-bromopentane 2-bromopentane

Ethanoyl chloride is a common acyl chloride. Any other acyl chloride will function similarly.  Similarly, ethanol is regarded as a typical alcoholic beverage. simply substitute the CH3CH2 group with an alkyl group.

The first stage of the reaction (the addition stage) includes a nucleophilic attack on the relatively positive carbon atom by one of the lone pairs on an ethanol molecule's oxygen.

The second stage (elimination) occurs in two stages. The carbon-oxygen double bond reforms in the first step, releasing a chloride ion.

The ethanoyl chloride then removes a hydrogen ion, yielding ethyl ethanoate and hydrogen chloride.

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Respiration deals with the gaseous exchange that occur between the individuals and the environment.

The term respiration deals with the gaseous exchange that occur between the individuals and the environment. The individuals take in a gas from the environment and pass out a gas to the environment. This is the way in which the balance of the universe is maintained.

Now, plants take in carbon dioxide and give out oxygen whereas animals take in oxygen and give out carbon dioxide. By so doing, the delicate carbon - oxygen balance in nature is maintained unless it is upturned by anthropogenic activities.

The following fill in the blanks as requested in the question;

a) Inhalation and exhalation'

b) trachea

c) carbon dioxide

d) leaves and stomata

e) xylem and phloem

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Answer:

a) inhalation and exhalation

b) trachea

c) carbon dioxide

d) leaves and stomata

e) xylem and phloem

Answer:

43 g N₂

Explanation:

To find the mass of N₂ required, you need to (1) convert grams H₂ to moles H₂ (via molar mass), then (2) convert moles H₂ to moles N₂ (via mole-to-mole ratio from equation coefficients), and then (3) convert moles N₂ to grams N₂ (via molar mass). It is important to arrange the conversions in a way that allows for the cancellation of units. The final answer should have 2 sig figs to match the amount of sig figs of the given value.

Molar Mass (H₂): 2(1.008 g/mol)

Molar Mass (H₂): 2.016 g/mol

Molar Mass (N₂): 2(14.009 g/mol)

Molar Mass (N₂): 28.018 g/mol

1 N₂(g) + 3 H₂(g) -----> 2 NH₃(g)

9.3 g H₂           1 mole             1 mole N₂             28.018 g
--------------  x  ----------------  x  --------------------  x  ------------------  =  43 g N₂
                        2.016 g            3 moles H₂            1 mole

When nitrous acid (HNO₂) dissociates in water (H₂O), the reaction that best captures this process is:

                HNO₂ (aq.) + H₂O ↔  H₃O⁺ (aq.) + NO₂⁻ (aq.)

How does one know about HNO₂?

Is HNO₂ a basic or an acid?

Acidity is assigned to nitrous acid (HNO₂). Once dissolved in water, it gives out H+ ions. Acid is a chemical that produces H+ ions in a water-based solution or gives the protons to other molecules.

Thus, HNO₂ is acid because it causes a mixture of water to contain H+ ions. In a 10 mM concentration, it possesses a pH of 2.67.

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Answer:

32(molecular mass has no unit )

Explanation:

(16)(o2)

16×2

=32

The possible options for the proposed multiplication or division of measurements are:

1. 9.0 km * 7.0 km = 63 km²; this is a correct option because km² is dimensionally correct.

3. 24 dL²/0.60 L = 0.24 L²/0.60 L = 0.4 L is a correct option since L is a unit of volume.

The possible options among the proposed multiplication or division of measurements are those which are dimensionally correct.

Considering the given options:

1. 9.0 km * 7.0 km = 63 km²

This is a correct option because km² is dimensionally correct as it is a unit of area.

2. 2.0 g²  * 0.043 kg is not correct since there is no unit of square mass.

3. 24 dL²/0.60 L = 0.24 L²/0.60 L = 0.4 L is a correct option since L is a unit of volume.

In conclusion, the correct measurements options are those that are dimensionally correct.

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A student makes up 2 l of a 3. 0 m aqueous solution of HBr. to this solution she adds 1 l of a 4 m NaOH solution, then the pH of the resulting solution is 13.83.

Normality is defined as the ratio of equivalent mass of compound to the volume of solution in litre.

N1 is the normality of HBR = 3m

N2 is the normality of NaOH = 4m

V1 is the volume of the HBr = 2l

V2 is the volume of the NaOH = 1l

V is the total volume of solution = V1 + V2 = 2l +1l

= 3l

Normality of the solution = N

As we know that,

N1V1 - N2V2 = NV

3 × 2 – 4 × 1 = N × 3

6 – 4 = N – 3

N = 2/3 = 0.67 m

(OH-) = N = 0.67 m

Since normality of NaOH is greater than BR . Hence the resulting solution is alkaline.

pOH = -log[OH-]

POH = - log (0.67) = 0.17

As we know that,

PH + pOH = 14

pH = 14 – 0.17

= 13.83

Thus, we calculate that the pH of the resulting solution is 13.83.

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The number of  electrons present in the nonbonding π molecular orbital of the allyl anion is 4 electrons . 2 in the pi bond of the allyl ion and the other two will be present as a lone pair on the carbon atom.

It is a type of orbital that does not affect the bond order or bond length and the bond order of the molecule and does not affect its energy too.

In allyl anion  allyl anion occupies 4 pi electrons and ψ2 is the Highest Occupied Molecular Orbital whereas ψ3* is the Lowest Unoccupied Molecular Orbital

Therefore, the number of  electrons present in the nonbonding π molecular orbital of the allyl anion is 4 electrons . 2 in the pi bond of the allyl ion and the other two will be present as a lone pair in on the carbon atom.

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Answer:

A.) 6.35

Explanation:

To find the mass of MgCl₂, you need to multiply the given value by the molar mass. The molar mass is made up of each element's atomic mass times their quantities. It is important to arrange the conversion in a way that allows for the cancellation of units.

Atomic Mass (Mg): 24.305 g/mol

Atomic Mass (Cl): 35.453 g/mol

Molar Mass (MgCl₂): 24.305 g/mol + 2(35.453 g/mol)

Molar Mass (MgCl₂): 95.211 g/mol

0.0667 moles MgCl₂           95.211 grams
---------------------------------  x  ------------------------  = 6.35 grams MgCl₂
                                                   1 mole

The addition of two-carbon units to a growing fatty acid chain is directly driven by Decarboxylation of malonyl-coA.

Hence, Option C is correct answer.  

Fatty acids are carboxylic acid in which molecules are composed of a straight long chains of even number of carbon atom with hydrogen atoms. Fatty acid is an acid that is found in fats and oils.

The chemical reaction which eliminates a carboxyl group and releases carbon dioxide is called decarboxylation.

Thus from the above conclusion we can say that The addition of two-carbon units to a growing fatty acid chain is directly driven by Decarboxylation of malonyl-coA.

Hence, Option C is correct answer.  

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Disclaimer: The question was given incomplete on the portal. Here is the complete question.

Question: The addition of two-carbon units to a growing fatty acid chain is directly driven by

a) Hydrolysis of ATP

b) Oxidation of NADPH

c) Decarboxylation of malonyl-coA

d) Reduction of NADP+

The location of reduction in an electrochemical cell is called the anode.

An electrochemical cell ( galvanic cell ) is generate electric energy from chemical reactions. In galvanic cell species ( for example zinc and zinc cations ) from one half-cell lose electrons ( oxidation ) and species from other half-cell ( for example copper and copper cations ) gain electrons ( reduction ).  Electric current is generated due to the flow of electrons from the anode that undergoes an oxidation reaction to the cathode which has a reduction reaction in the circuit of an outer wire circuit.

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There are  0.138 gram  copper could be electroplated on the cathode in an experiment where an average of 200 ma was passed through the cell for 35 minutes .

Calculation ,

Given ; Current passed through copper ( I ) = 200 mA =  200×[tex]10^{-3}[/tex] A

time in second = 35 minutes×60 = 2100 sec

Current ( I )= Q/t

Q =It =  200×[tex]10^{-3}[/tex] A  × 2100 sec  = 420 C

96500 C of charge =  1 mole

420 C of charge =  1 mole ×420 C/ 96500 C = 0.00435 mol

In  , the valancy of Cu is +2 .

2 moles of electron  are required for the decomposition of 1 mole of Cu on the cathode .

0.00435 mol  of electron  are required for the decomposition of Cu =  1mol × 0.00435 mol/2 = 0.002175 mol of Cu

Number of moles of Cu = given mass / molar mass

Mass of Cu = Number of moles of Cu × molar mass = 0.002175 ×63.546

Mass of Cu = 0.138 gram

Therefore , mass of copper is  0.138 gram

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A buffer solution contains an equivalent amount of acid and base. The pH of the solution with an acid dissociation constant (pKa) value of 3.75 is 3.82.

The amount of hydrogen or the proton ion in the solution is expressed by the pH. It is given by the sum of pKa and the log of the concentration of acid and bases.

Given,

Concentration of salt [HCOO⁻] = 0.24 M

Concentration of acid [HCOOH] = 0.20 M

The acid dissociation constant (pKa) = 3.75

pH is calculated from the Hendersons equation as,

pH = pKa + log [salt] ÷ [acid]

pH = 3.75 + log [0.24] ÷ [0.20]

= 3.75 + log (1.2)

= 3.75 + 0.079

= 3.82

Therefore, 3.82 is the pH of the buffer.

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After 0.0015 mol of NAOH is added to 0.5000 l of this solution, the pH is 3.37.

First, modify the Henderson-Hassle-batch equation to find the acid's pka.

[tex]pH=pka + log\frac{[A]}{[HA]}[/tex]

[tex]pka = pH-log\frac{[A]}{[HA]}[/tex]

[tex]=3.35- log \frac{[0.1500]}{[ 0.2000 ]}[/tex]

[tex]pka =3.47[/tex]

Molarity of the added NaOH.

[tex]M=\frac{mol}{L}[/tex]

[tex]=\frac{0.0015 mol}{ 0.5000L}[/tex]

= 0.003 M

In water, NaOH will dissociate

[tex]NaOH- > Na^{+} + OH^{-}[/tex]

strong base OH will react with HA

HA+ OH --> [tex]H_{2} O[/tex] + A

the reaction also produced A. as, all OH are consumed in the reaction

HA will be decreased by 0.003 M and A will be increased by 0.003 M.

[tex]HA= 0.2000-0.003 \\= 0.1970[/tex]

[tex]A=0.1500+0.003=0.1530 M[/tex]

solving new pH using pka and the new values of [HA] and [A]

[tex]pH=pka + log\frac{[A]}{[HA]}[/tex]

[tex]=3.35 + log\frac{[0.1530]}{[0.1970]}[/tex]

pH=3.37 is the ph after 0.0015 mol of naoh is added to 0.5000 l of this solution

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Ethers have a much lower boiling point than their isomeric alcohols because ether have not hydrogen bond that why ethers have lower boiling point .

Ethers will not have a hydrogen atom attached to the oxygen atom as alcohols do. Because ether molecules can not form intermolecular hydrogen bonds, their boiling points are much shorter than those of alcohol with such a comparable mass.

Owing to the combination of intermolecular H-bonding in alcohols though not in ethers, alcohols possess higher boiling temperatures than isomeric ethers.

Therefore, ethers have a much lower boiling point than their isomeric alcohols because ether have not hydrogen bond that why ethers have lower boiling point .

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Answer:

decreased by a factor of 10

Explanation:

pH is defined in such a way that;

pH= −log10(H)

Where H represents the concentration of Hydronium or Hydrogen ions

Given that pH is changed from 1 to 2,

By rearranging the above formula , we get 10−pH = H

Therefore,  0.1/0.01 = 10 and 0.1 > 0.01

Hence, the concentration of hydronium ions in the solution is decreased by a factor of 10.

The stable form  of the major product of naoch2ch3 in ch3ch2oh reaction is given below.

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Since 1750, about 46 percent of CO2 is increased in the atmosphere.

Co2 gas is considered as Greenhouse effect.

Green house effect : The trapping of the sun's warmth in a lower atmosphere of planet, due to the more and more transparency of the atmosphere to visible radiation from the sun than the infrared radiation which are emitted by the surface of the planet.

Due to greenhouse effect the temperature of earth surface increases.

Many reasons for increase in Greenhouse effect are as follow:

Due to these reason the percentage of CO2 in the atmosphere is increased by 46.

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The molar concentration of potassium ions in a  0. 250 m K₂SO₄(aq) solution is 2.

The molar concentration of a solution is the presence of solute in one unit of a solution.

Molar concentration = number of moles / volume

The volume is given 0.250 m

To calculate the number of moles:

There will be 2 moles of potassium and  1 mole of sulfate in one L of the solution.

So in 0.250 L

0.250 x 2 x 1 = 0.500

The total number of moles of potassium and sulfate ion are 0.500

Now, putting the value:

Molar concentration = number of moles / volume

0.500 / 0.250 = 2

Thus, the molar concentration is 2.

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The viscosity of a solution is quadrupled, the rms-average distance of a collection of diffusing molecules from their starting point would be [tex]\frac{1}{2}[/tex] over the same amount of time.

If the viscosity of a solution is quadrupled then the distance of collection of diffusing molecules would be half over the same amount of time. The viscosity of the molecules is dependent on density of the liquid. It is independent to the volume of the liquid.

Viscosity is measure of a fluid's resistance of flow.

The SI unit of viscosity is Poiseuille (PI) is other units ae newton second per square meter or pascal second. The dimensional formula of viscosity is [[tex]ML^{-1}T^{-1}[/tex]].

The viscosity of liquids decreases rapidly with an increase in temperature, and the viscosity of gases increases with an increase in temperature.

η = [tex]\frac{2ga^{2} (Δρ)}{9v}[/tex]

Where (Δρ) is the density difference between fluid and sphere tested, a is the radius of the sphere, g is the acceleration due to gravity and v is the velocity of the sphere.

Viscosity Types:

Viscosity is the measure of fluid's friction to it's flow. There are two ways to measure the fluid is viscosity is follows:

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Answer:

Explanation:

Hope it helps you

The reading of mass so of hydrochloric acid involves sequence of analysis including:

The chemical structure of hydrochloric acid is HCl

Mass spectrometry is defined as a special analytical technique that is used to measure the mass ratio of ions.

It is used to determine the masses of atoms of chemical elements

So therefore, the reading of mass so of hydrochloric acid involves sequence of analysis including:

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The mass of the substance is the quantitative measure of the physical object. The mass of the sample must be reported as 3.5465 g. Thus, option e is correct.

The mass of the substance is the quantity of matter that the sample weighs and is reflected in grams or kilograms.

Given,

Mass of empty sample container = 12.00 g

Mass of sample + empty container = 15.5465 g

The mass of the sample will be given as,

mass of sample = (Mass of sample + empty container) - ( Mass of empty container)

= (15.5465 g - 12.00g)

=3.5465 g

Therefore, 3.5465 gm is the mass of the sample, and the correct option is e.

Your question is incomplete, but most probably your full question was, A label on an empty sample container reads 12.00 g. you add in a sample of a compound and the mass of the sample container obtaining 15.5465 g. what should the mass of the sample be reported as?

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Answer:

B.) More NO would form.

Explanation:

If the amount of N₂ increases, the equilibrium will be out of balance. In order to restore the balance, the reaction will shift to the products side. As such, the amount of NO will increase.

According to Le-chatlier principle, if N₂ is added to the reaction system, then more NO will be produced so as to decrease the amount of N₂.

The Le Chatlier's Principle, also known as the Le Chatlier's Law, is a principle in chemistry that states that when a system at equilibrium is subjected to a change in conditions, such as temperature, pressure, or concentration, the system will adjust its equilibrium position to counteract the change and restore equilibrium.

In other words, if a system is disturbed from its equilibrium state, it will try to minimize the effect of the disturbance by shifting the equilibrium position in a direction that partially offsets the disturbance.

If any substance is added to the system, the equilibrium will shift to the direction in which the added substance is consumed. Hence, as  N₂ is added to the system, it will consumed to give the product NO.

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The conjugate acid is H2SeO4 and the conjugate base pairs in the reaction is H2O.

The full equation of the reaction is

H2SeO4 + H2O----- H3O^+(aq) + HSeO4

Conjugate base are those substance formed when an acid loses a hydrogen ion. Considered a base because it can gain a hydrogen ion to reform the acid.

The conjugate acid is the species that donate a proton to the conjugate base, hence H2SeO4 is the conjugate acid while H2O is the conjugate base because it accepts a proton from H2SeO4.

Thus we concluded that the conjugate acid is H2SeO4 and the conjugate base pairs in the reaction is H2O.

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The number of sugar particles is 7.4 * 10^22 particles.

The mole is used to describe the amount of substance. The idea was first introduced by Professor Avogadro and the number of particles that constitute one mole of a substance was said to be 6.02 * 10^23 particles in a mole.

Thus;

Molar mass of sugar = 342 g/mol

Number of moles of sugar = 42 grams/342 g/mol = 0.123 moles

Now;

If 1 mole of sugar costs 90 cents

0.123 moles of sugar costs 0.123 moles *  90 cents/1 mole

= 11 cents

Now we know that;

1 mole of sugar contains  6.02 * 10^23 particles

0.123 moles of sugar contains 0.123 moles *  6.02 * 10^23 particles / 1 mole

= 7.4 * 10^22 particles

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The pH of the solution is 4.96.

pH measures the amount of hydrogen and hydroxide ions in a solution and shows how acidic or alkaline it is.

Weak bases are the solutions to substances that do not dissociate completely in water. Conjugate acids are the product formed by the base and have a difference of one proton.

Using the base dissociation constant, Ka

pKa can be calculated as,

[tex]pKa = - log (Ka)[/tex]

       [tex]= - log (7.1 * 10^-6)[/tex]

       [tex]= 5.15[/tex]

0. 025 M in the weak base and 0. 039 M in the conjugate weak acid.

Therefore, a weak base and its conjugate acid are present in equal proportions in buffer solution. As we are aware, the Henderson-Hasselbalch equation can be used to determine the pH of a buffer solution that comprises a weak base and its conjugate acid.

[tex]pH = pK + log [\frac{A^-}{HA} ]\\[/tex]

     [tex]= 5.15 + log( \frac{0.025}{0.037})[/tex]

     [tex]=5.15 + log 0.64[/tex]

     [tex]=5.15-0.19[/tex]

     [tex]=4.96[/tex]

Therefore, the pH of the solution is 4.96.

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Emphysema can lead to respiratory acidosis acid/base disturbance.The compensated respiratory acidosis is typically the result of the chronic condition  , the slow nature of onset giving the kidney time to compensate.

If the primary acid-base disorder is from respiratory , then the kidneys will compensate. If the primary acid-base disorder is from metabolic cause, then the lungs will compensate.The respiratory compensation can be begin within minutes and becomes maximal in 12-24 hours

The respiratory acidosis occurs when breathing out does not get of enough [tex]CO_{2}[/tex] . The increased [tex]CO_{2}[/tex] that  remains results in overly acidic blood. This can results from respiratory problems.

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The formation of rust (equation above) is an example of both combustion and Synthesis

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Answer:

synthesis

Explanation:

Answer:

525 mmHg

Explanation:

If all other variables are held constant, you can find the pressure using Boyle's Law. The equation looks like this:

P₁V₁ = P₂V₂

In this equation, "P₁" and "V₁" represent the initial pressure and volume. "P₂" and "V₂" represent the final pressure and volume. You can plug the given values into the equation and simplify to find "P₂".

P₁ = 709 mmHg                      P₂ = ? mmHg

V₁ = 3.97 L                              V₂ = 5.36 L

P₁V₁ = P₂V₂                                                         <----- Boyle's Law

(709 mmHg)(3.97 L) = P₂(5.36 L)                      <----- Insert values

2814.73 = P₂(5.36 L)                                          <----- Simplify left side

525 = P₂                                                            <----- Divide both sides by 5.36