step 4: if a chiral center is formed from grignard addition, a mixture of enantiomers will be formed. the grignard reagent can attack at either the top face or bottom face of the carbonyl to give an equal mixture of chiral products. which carbonyls will give an achiral product after a grignard reaction with ch3mgbr ?

Explanation:

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The species that act as acid are the ones that donates H⁺ in the reaction.

Since we are working with an equilibrium, we have to consider both directions.

From left to right, we have H₂O turning into OH⁻ because it lost one H⁺, so H₂O is acting as an acid in the forward reaction.

From right to left, we have CH₃NH₃⁺ tunrning into CH₃NH₂ because it lost one H⁺, so CH₃NH₃⁺ is acting as an acid in the backwards reaction.

So, the species that act as acids are H₂O and CH₃NH₃⁺, I and II only.

Energy storage and transport. Chemical energy transport.

Answer:

to clean the water

Explanation:

\(C_3H_6\)  has a double bond in its carbon skeleton. This is a true statement.

Carbon skeleton refers to the chain of carbon atoms that make up an organic molecule. The presence or absence of double bonds in the carbon skeleton affects the properties of the molecule and how it interacts with other molecules. In \(C_3H_6\), there are three carbon atoms arranged in a linear chain, with each carbon atom forming single covalent bonds with two hydrogen atoms. The remaining valence electrons on each carbon atom form a double bond between the first and second carbon atoms.

This double bond is responsible for the unsaturated nature of the molecule. \(C_3H_6\)is an example of a simple alkene, also known as propene. Its carbon skeleton and double bond make it a versatile molecule that can be used in various applications, including the production of plastics, rubber, and other materials.

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Answer:

D

I just got it right

Answer:

D

Explanation:

On edge

Answer:

I don't wanna intrigue but I think this is how you want things to go. But to make it easier all you have to do is look up "what is genomics" and then simply answer each question should take maybe 5-7 minutes. Just trying to help :)

There are 11.5 moles of potassium contained in 449 g fundamental units of potassium. therefore,

option B is correct.

A mole is the mass of a substance made up of the same number of fundamental components. Atoms in a 12-gram example are identical to 12C. Depending on the substance, the fundamental units may be molecules, atoms, or formula units.

Atomic weight 39.1 is assigned to potassium (chemical symbol K).

K content in a 449g sample is equal to

                                  =given weight / atomic weight

                                  =449/39.1

                                  = 11.5mol.

A 449g sample has 11.5 moles of potassium.

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Answer:

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the Clausius equation relates the change in entropy of a system to the heat flow and temperature at which the heat is transferred. This physical relationship reflects the fundamental principle that the entropy of a system tends to increase over time, and that heat flows spontaneously from hotter to cooler objects in order to achieve this increase in entropy.

The Clausius equation relates the change in entropy of a system to the heat flow and temperature at which the heat is transferred. It is given by:

ΔS = Qrev/T

where ΔS is the change in entropy of the system, Qrev is the amount of heat transferred reversibly between the system and its surroundings, and T is the temperature at which the heat is transferred.

To understand the physical basis of this equation, we need to consider the concept of entropy. Entropy is a measure of the disorder or randomness in a system. As a system evolves, it tends to move towards a state of maximum entropy, where its energy is spread out uniformly and there is no gradient or potential for further energy transfer. The second law of thermodynamics states that the entropy of an isolated system always increases over time, which implies that heat always flows spontaneously from hotter to cooler objects.

The Clausius equation relates this concept of entropy to the transfer of heat between a system and its surroundings. It tells us that the change in entropy of a system is proportional to the amount of heat transferred reversibly between the system and its surroundings, and inversely proportional to the temperature at which the heat is transferred. The term "reversible" refers to a process that can be reversed with infinitesimal changes to external conditions, so that the system and its surroundings return to their original states.

The physical relationship between the quantities in the Clausius equation can be understood as follows. The change in entropy of a system is related to the amount of heat transferred reversibly between the system and its surroundings, because heat flow is a key factor in determining the degree of disorder or randomness in a system. As heat flows from a hotter object to a cooler object, it tends to spread out and become more evenly distributed, which increases the entropy of the system. The temperature at which the heat is transferred is also important, because the higher the temperature, the greater the potential for heat to flow and increase the entropy of the system.

In summary, the Clausius equation relates the change in entropy of a system to the heat flow and temperature at which the heat is transferred. This physical relationship reflects the fundamental principle that the entropy of a system tends to increase over time, and that heat flows spontaneously from hotter to cooler objects in order to achieve this increase in entropy.
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Answer:

\(V_2=146mL\)

Explanation:

Hello there!

In this case, since the equation for the calculation of dilutions is:

\(M_1V_1=M_2V_2\)

Whereas M is the molarity and V the volume, because the final concentration is lower than the initial. Thus, since we are asked to calculate the final volume, we solve for V2 as follows:

\(V_2=\frac{M_1V_1}{M_2}=\frac{0.885M*82.5mL}{0.500M}\\\\V_2=146mL\)

Best regards!

Answer:

96 Zr

Explanation:

just took the quiz and that was the right answer

Answer:

Aluminium (Al): (3*2)+(5*2)=16

Sulphor (S): (3*1)=3

Oxygen (O): (4*3)+(3*1)=15

The balanced equation for the given chemical reaction is:

Cu(s) + 4 HNO3(aq) → Cu(NO3)2(aq) + 2 NO2(g) + 2 H2O(l)

In this chemical reaction, copper (Cu) reacts with nitric acid (HNO3) to produce copper nitrate, nitrogen dioxide, and water.

A balanced equation is one where the number of atoms on both sides of the equation is the same. The balanced equation shows that one copper (Cu) atom reacts with four nitric acid (HNO3) molecules, forming one copper nitrate (Cu(NO3)2) molecule, two nitrogen dioxide (NO2) molecules, and two water (H2O) molecules.

Thus, when the given equation is balanced with the lowest whole-number coefficients, the coefficients are:

Cu(s) + 4 HNO3(aq) = Cu(NO3)2(aq) + 2 NO2(g) + 2 H2O(l).

Therefore, the coefficients of the equation are Cu(s) + 4HNO3(aq) + Cu(NO3)2(aq) + 2NO2(g) + 2H2O(l).

The solution to the problem above was provided with the correct balanced equation and a thorough explanation.

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Instrumental methods of chemical analysis have several advantages over traditional methods. Some of these advantages are; Increased sensitivity, specificity, Speed, Accuracy and precision, and Quantitative analysis.

Instrumental methods are often more sensitive than traditional methods, allowing for detection and quantification of lower concentrations of analytes.

Instrumental methods can distinguish between different analytes that have similar chemical properties, which is not possible with some traditional methods.

Instrumental methods are often faster than traditional methods, allowing for the analysis of a larger number of samples in a shorter period of time.

Instrumental methods are generally more accurate and precise than traditional methods, due to the use of advanced instrumentation and automation.

Instrumental methods can be used to measure the quantity of a specific analyte in a sample, which is not always possible with traditional methods.

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The melting point (mp) of the semicarbazone derivative measured at 161 ºC is higher than the literature value.

The melting point is a characteristic property of a compound and can be used to identify and assess its purity. When comparing the measured mp to the literature value, we can determine if the compound is lower, exact, or higher than expected.

In this case, since the measured mp is higher than the literature value, it suggests that the compound obtained is impure or contains impurities that affect its melting behavior. Impurities can raise the melting point of a compound by disrupting the regular arrangement of molecules and increasing the energy required for the solid to transition into a liquid phase. Therefore, further purification or analysis may be necessary to obtain the compound with the expected or published mp.

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Answer:

Since 1982, STP is defined as a temperature of 273.15 K (0 °C, 32 °F) and an absolute pressure of exactly 105 Pa (100 kPa, 1 bar).

Explanation:

I hope I helped

Answer:

b, decrease in movement of the molecules

Explanation:

removing the energy will begin making the molecules lock up and stop moving due to the loss of energy.

hope this helped

A potassium atom's ground state electron configuration is 1s2, 2s2, 2p6, 3s2, 3p6, 4s1.

An atom's electron configuration is a picture of how electrons are arranged in relation to orbital shells and subshells. Consequently, this is potassium's electron configuration.

Making Electron Configurations in Writing. Write the energy level (the period) first, then the subshell that needs to be filled, and finally the superscript, which indicates how many electrons are in that subshell. The atomic number, Z, is the sum of all the electrons.

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Answer:

The molarity of the solution is 0.335 \(\frac{moles}{liter}\)

Explanation:

Molar concentration is a measure of the concentration of a solute in a solution, be it some molecular, ionic, or atomic species.

Molarity is the number of moles of solute that are dissolved in a certain volume and is calculated by:

\(Molarity=\frac{number of moles of solute}{volume}\)

Molarity is expressed in units \(\frac{moles}{liter}\).

Being the molar mass of BaBr2 equal to 297.14 g/mole, that is to say that 1 mole contains 297.14 grams, the mass of 198 grams are contained in:

\(198 grams*\frac{1 mole}{297.14 grams} = 0.67 moles\)

So:

Replacing in the definition of molarity:

\(Molarity=\frac{0.67 moles}{2 L}\)

Solving:  

Molarity= 0.335 \(\frac{moles}{liter}\)

The molarity of the solution is 0.335 \(\frac{moles}{liter}\)

Answer:

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Answer:

Pour dish detergent or regular detergent onto the stain area and rub in with the brush. Allow the detergent to sit for 30 minutes. Wash as usual. Air dry, again to make sure the oil stain is actually gone.

Explanation:

Hope I helped

Answer: Both are compounds

Explanation:

\(\text{N}_{2}\) is an element, not a compound.

The type of fingerprint found at the crime scene in this scenario is referred to as plastic.

This is the of fingerprint which is three dimensional and can be easily seen with the human eye.

Plastic fingerprint can be made by pressing the finger on substances such as wax, paint etc.

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Answer:

the answer would be molded I believe.

choices are Latent,patent, inadmissible molded,trace.

Answer: The molar mass of Aluminum Bromide is 266.68 g/mol.

Explanation:

I took the test and I just know the answer.

Hope this helps :)

Please mark me as brainliest.

Answer: 266.68 g/mol.

Explanation: The molar mass of AlBr3 can be calculated by adding the atomic masses of one aluminum atom and three bromine atoms. The atomic mass of aluminum is 26.98 g/mol, and the atomic mass of bromine is 79.90 g/mol.

Therefore, the molar mass of AlBr3 is 26.98 + (3 × 79.90) = 266.68 g/mol.

answer:

is Well-Known Member. For a 35" you should be in the 28-32 range on road.

Explanation:

your welcome make brainlist

Answer:

first you'd need to write the balanced symbol equation of the reaction between KOH and HCL which would be:

KOH+HCL-> KCL+H20

you know that 35cm^3 of 2 mol/dm^3 HCL has been used, and you need to work out the moles of the HCL from this info using the equation:

concentration(mol/dm^3 )=moles(mol)/volume(dm^3)

rearranging the equation to make moles the subject, you'd get: moles=concentration x volume

plugging in the info, you'd get moles of HCL= 35/1000 dm^3 x 2 moldm^3= 0.07 mol

because there's a 1:1 ratio of HCL:KOH, the moles of KOH would also equal 0.07 mol

now using the con equation, you'd get the concentration of KOH= 0.07mol/(50/1000) dm^3= 1.4 moldm^3

Explanation:

hope this helps and sorry if any of my calculations are wrong! you may want to double check all the calculations.

Answer:

a drought !

- little to no water causes it

- it causes for organisms to die and organisms need water !