Calculations
Weight of acetanilide = 2.7g
Theoretical yield of Nitroaniline =
Weight of para-nitroaniline = 1.5g
Percentage yield of para-nitroaniline =

Please help me which this and show me how you get the answer thank you

Answer:

b

Explanation:

b

The type of structure would contain a few non-metal atoms are simple covalent structure. Option B is correct.

A covalent bond is a chemical bond between two atoms, ions  or molecules in which electron pairs are shared between elements and covalent bond can also be said as  a molecular bond.

Covalent bonds form or made by  between two non-metallic atoms or compounds with identical or same electronegativity for example hydrogen and oxygen are two non metals and bond to form water molecule.

Therefore, type of structure would contain a few non-metal atoms are simple covalent structure. Option B is correct.

Learn more about covalent structure, here:

https://brainly.com/question/6476147

#SPJ2

Explanation:

Photovoltaic means electricity from light

photo = light voltaic = electricity

SUNLIGHT is the answer

Hope this is correct

HAVE A GOOD DAY!

Answer: 13.60

Explanation:

[tex]\frac{10^{-14} }{4.0 x 10^{-} }[/tex] = 2.5 x10^-14  this =[tex][H_{3} O^{+} ][/tex]

pH = -log[tex][H_{3}O^{+} ][/tex]

pH= -log( 2.5 x10^-14) = 13.60

Answer:

the answer will be Oa. 2.26

Answer:

[tex]\boxed{\sf D. \ [Ar] \ 3d5 \ 4s2}[/tex]

Explanation:

Manganese is a group 7 transition metal with an electronic configuration of [Ar] 3d5 4s2.

The atomic number of manganese (Mn) is 25. The electron configuration for manganese is  [Ar] [tex]\rm 3d^5 4s^2[/tex]. Therefore, the correct option is option D.

The electron configuration depicts how electrons are dispersed throughout an atom's energy levels and orbitals. Manganese (Mn) has an atomic number of 25, meaning that the atom contains 25 electrons. Manganese (Mn) has the following electron configuration: [tex]\rm 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^5[/tex]

We can use the noble gas notation to indicate the electron configuration in a more compact form by indicating the noble gas that comes before the electron configuration. The noble gas that comes before manganese (Mn) is argon (Ar), whose electron configuration is[tex]\rm 1s^2 2s^2 2p^6 3s^2 3p^6[/tex]. The electron configuration of manganese (Mn) can be expressed as [tex][Ar] 3d^5 4s^2[/tex] using noble gas notation.

To know more about electron configuration, here:

https://brainly.com/question/29157546

#SPJ6

Answer:

C

Explanation:

Rate = k(A)m(B)n

The correct option is C.

What are K , m and N in the rate law equation?

The specific rate constant (k) is the proportionality constant relating the rate of the reaction to the concentrations of reactants.The exponents m and n are the reaction orders and are typically positive integers, though they can be fractions, negative, or zero.

What do you mean by concentrations of reactants?

The increase in the concentration of reactants, the rate of reaction increases. Ions and molecules interact to form a new compound on increasing the concentration.

Learn more about concentrations of reactants here : brainly.com/question/8314253

#SPJ2

Answer:

Para otros usos de este término, véase Resistencia.

La resistencia antibiótica es la capacidad de un microorganismo para resistir los efectos de un antibiótico. La resistencia se produce naturalmente por selección natural a través de mutaciones producidas por azar. El antibiótico, al entrar en contacto con una población bacteriana, permite solo la proliferación de aquellas bacterias que presentan aquella mutación natural que anula la acción del antibiótico. Una vez que se genera la información genética, las bacterias pueden transmitir los nuevos genes a través de transferencia horizontal (entre individuos) por intercambio de plásmidos; o igualmente producto de una conversión lisogénica. Si una bacteria porta varios genes de resistencia, se le denomina multirresistente o, informalmente, superbacteria.

Answer:

O2(g) as a product

Explanation:

took the test

The substances which appear on the left hand side of the chemical equation are called the reactants and the products are on the right hand side. Here oxygen appears as a reactant in the final equation. The correct option is B.

A chemical equation in which the number of atoms of reactants and products on both sides of the equation are equal is defined as the balanced chemical equation. A balanced equation obey the law of conservation of mass.

Here the given two equations are:

C (s) + 1/2 O₂(g) → CO (g)

CO (g) + 1/2 O₂(g) → CO₂ (g)

On adding the above two equations:

C (s) + O₂(g) → CO₂ (g)

So in the final chemical equation, oxygen appears on the reactant side. So oxygen is a reactant.

Thus the correct option is B.

To know more about chemical equation, visit;

https://brainly.com/question/19626681

#SPJ7

The given question is incomplete, most probably your full question was:

Consider the following intermediate chemical equations.

C (s) + 1/2 O₂(g) → CO (g)

CO (g) + 1/2 O₂(g) → CO₂ (g)

How will oxygen appear in the final chemical equation?

A. as a product

B. as a reactant

C. as a salt

D. as a mixture

Answer:

0.00302min⁻¹ = k

Explanation:

In a first order reaction the concentration of the reactant decrease following the equation:

ln[A] = -kt + ln[A]₀

ln [A] / [A]₀ = -kt

Where [A] represents actual and initial concentration of the reactant, k rate constant and t time.

As the reactant drop to 18.0% of its initial concentration  [A] / [A]₀ = 0.18

And time = 56.7min:

ln [A] / [A]₀ = -kt

ln 0.18 = -k*56.7min

-1.715 / 56.7min = -k

Answer:

Increase energy use during reactions

Explanation:

Answer via Educere/ Founder's Education

Increase energy use during reactions. Hence, option D is correct.

An atom is any particle of matter at its most basic level which contains at least one proton.

A reaction with a high atom economy is important in industry because it uses lesser natural resources, produces less waste, and is better for the environment. It is also cheaper to produce and more sustainable.

Increasing energy used during reactions is NOT a reason atom economy is important.

Hence, option D is correct.

Learn more about the atom here:

https://brainly.com/question/1566330

#SPJ5

Answer:

A. stronger

Explanation:

During a phase change, temperature stays constant because the energy added is absorbed by the substance to break intermolecular forces, rather than increasing its kinetic energy. This process, known as latent heat, causes the molecules to undergo a structural rearrangement without temperature change until all the substance has transformed.

When a substance undergoes a phase change, such as melting or boiling, the energy being supplied is used to overcome the forces between its molecules rather than increasing their kinetic energy. This energy is called latent heat.

The absorbed heat breaks intermolecular bonds, enabling the molecules to rearrange their structure. As a result, the temperature remains constant during this transformation until the entire substance has fully changed phases. After the phase change is complete, the temperature resumes increasing or decreasing, depending on the direction of the phase transition.

Read more about temperature here: https://brainly.com/question/27944554

#SPJ6

Answer:

7.0625

Explanation:

The trapezoidal rule ( this is an approximation ) tells you that the average of the left and right endpoints should be as follows,

[tex]\int _a^bf\left(x\right)dx\:\approx \frac{\Delta \:x}{2}\left(f\left(x_0\right)+2f\left(x_1\right)+...+2f\left(x_{n-1}\right)+f\left(x_n\right)\right)[/tex]

where [tex]\Delta \:x\:=\:\frac{b-a}{n}[/tex] ... at this point we can apply the Riemann Formula, in order to divide the interval 0 ≤ x ≤ 2 into n = 4 subintervals of length [tex]\:\Delta x=\frac{1}{2}\:[/tex].

[tex]x_0=0,\:x_1=\frac{1}{2},\:x_2=1,\:x_3=\frac{3}{2},\:x_4=2[/tex] ,

[tex]\frac{\Delta x}{2}=\frac{\frac{1}{2}}{2}=\frac{1}{4}[/tex]

= [tex]\frac{1}{4}\left(f\left(x_0\right)+2f\left(x_1\right)+2f\left(x_2\right)+2f\left(x_3\right)+f\left(x_4\right)\right)[/tex] - Let's calculate the sub intervals for each, substituting to receive our solution.

[tex]f\left(x_0\right)= 0[/tex] ( this is as 0⁴ is 0 )

[tex]2f\left(x_1\right)= 1/8[/tex] ( this is as [tex]2\left(\frac{1}{2}\right)^4=1/8[/tex] )

[tex]2f\left(x_2\right)=2[/tex] ( 2 [tex]*[/tex] 1⁴ is 2 )

[tex]2f\left(x_3\right)= 81/8[/tex] ( this is as [tex]2\left(\frac{3}{2}\right)^4 = 81/8[/tex] )

And finally [tex]f\left(x_4\right) = 16[/tex], as 2⁴ is 16. Therefore, let us plug in our solutions for each into the primary expression, and solve,

[tex]\frac{1}{4}\left(0+\frac{1}{8}+2+\frac{81}{8}+16\right)[/tex] = 7.0625 - this is our solution. The correct answer is option c, and i hope this clarifies why.

Pretty sure it would lose electrons.

If an atom of rubidium (R b) were to ionize, it would loose electron(s).

Ionization is the process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons,.

Ionization is when a neutral atom or molecule can be converted into electrically charged atoms by gaining or losing a free electron.

Ionization happens during the process of a chemical reaction. To ionize an atom or a molecule, either loses or gains electrons―the electron which is either gained or lost forms an ion. 

Therefore ,if an atom of rubidium (R b) were to ionize, it would loose electron(s).

Learn more about ionization of atom, here:

https://brainly.com/question/22845500

#SPJ2

Answer:

The correct ans is....

Option B) NH4" and H30*

Explanation:

NH4" and H30* is an example of conjugate pair

Hope this helps....

The acid-conjugate base pair : ( B ) NH₄⁺ and H₃O⁻

The chemical reaction is

NH₄ + H₂O --> NH₃ + H₃O

An acid-conjugate base pair is a pair that consists of two substances that are different from each other just by the presence or absence of a proton ( H⁺ ) it helps to determine the relative strengths of acids and bases.

Hence we can conclude that the acid-conjugate base pair : ( B ) NH₄⁺ and H₃O⁻.

Learn more about acid-conjugate : https://brainly.com/question/22390063

Answer:

25.5

Explanation:

divide the pressure value by 7.501 to get the answer oa. 25.5

Answer:

C

Explanation:

For each reaction, compare molecules of reactant to molecules of product. Decrease entropy means I'm looking for the one that decreases.

Answer:

Option A. 7.98 L.

Explanation:

The following data were obtained from the question:

Initial volume (V1) = 8 L

Initial temperature (T1) = 9.9 °C

Final temperature (T2) = 9.3 °C

Final volume (V2) =..?

Next, we shall convert celsius temperature to Kelvin temperature. This can be achieved as shown below:

Temperature (K) = temperature (°C) + 273

T(K) = T (°C) + 273

Initial temperature (T1) = 9.9 °C

Initial temperature (T1) = 9.9 °C + 273 = 282.9 K

Final temperature (T2) = 9.3 °C

Final temperature (T2) = 9.3 °C + 273 = 282.3 K

Finally, we shall determine the new volume of the gas as follow:

Initial volume (V1) = 8 L

Initial temperature (T1) = 282.9 K

Final temperature (T2) = 282.3 K

Final volume (V2) =..?

V1/T1 = V2/T2

8/282.9 = V2/282.3

Cross multiply

282.9 x V2 = 8 x 282.3

Divide both side by 282.9

V2 = (8 x 282.3)/282.9

V2 = 7.98 L

Therefore, the new volume of the gas is 7.98 L

Answer:

a 2.49

Explanation:

Molality is a measure of concentration of solution which describes the number of moles of solute per kilograms of the solvent.

Molality (M) = number of moles of solute (n) / kg solvent

According to the question; mass of solute (HCl) = 418.8g, mass of solvent (water) = 4.62kg

To find the number of moles (n) of solute (HCl), we use; mass (g) / molar mass (g/mol)

Molar mass of HCl = 1 + 35.5 = 36.5g/mol

Hence, n= 418.8/36.5

n= 11.4739

n= 11.5

Therefore, Molality= 11.5 mol of HCl / 4.62kg of water

M= 11.5/4.62

M= 2.489

Hence, molality of the solution is 2.49

Answer:

when silver articles exposed to air silver racts with Sulphur present in the atmosphere and form a black layer of silver sulphide on the surface. copper articles get tarnished by reacting with air and water. due to this, a layer is formed over copper vessels.

Explanation: When silver is exposed to sulfur-containing gases in the air, it discolours and then darkens as it reacts with the gas to form a surface layer of tarnish If a silver object is to be kept from tarnishing, it must be protected from sulfur-containing gases.

Answer:

C. It cannot be physically broken down into different types of atoms.

Answer:

ionize

Explanation:

Acids are chemical substances that lose/donate their hydrogen ion (H+) when they react with water. This property of acids is termed IONIZATION. In a chemical reaction involving acids and bases, acids release their proton or hydrogen ion (H+) in the presence of water solutions to form a conjugate base, which is usually an anion.

For example, in the chemical reaction;

HX + H20 -------> X- + H30+

HX is the acid because it loses its electron to water and forms the anion, X-, which is the conjugate base. Hence, it can be said that acid HX ionizes in water.

Answer:

C. Collisions of the right energy are more likely.

Explanation:

By increasing the concentration of reactants, a higher number of reacting molecules or ions are present in the reaction. This increases the chances of collisions occurring to increase the reaction rate.

Answer: C

Explanation:

collisions of the right energy are more likely

Answer:

[tex]\boxed{\mathrm{Alkene}}[/tex]

Explanation:

The hydrocarbon shown has a double bond. Hydrocarbons with double bonds are known as alkenes.

Cyclic alkanes have cyclic structure.

Alkanes only have single bonds.

Alkynes have triple bonds.

Answer:

Alkene

Explanation:

A molecule having a double bond between its atoms is called an alkene.

Answer:25.7

Explanation:

Answer:

A B C D (all of the above)

Explanation:

Weak acid do not have a much hydrogen ions when in liquids or aqueous solutions. Examples of weak acids include vinegar, citric acid (from oranges, lemons, etc)

The element that has been reduced in the redox reaction [tex]AgNO_3 + Na NaNO_3 + Ag[/tex] is silver (Ag). A redox (reduction-oxidation) reaction involves the reduction of one element by the gain of electrons and the oxidation of another element by the loss of electrons.

When sodium (Na) loses one electron to generate [tex]NaNO_3[/tex] in this reaction, sodium changes from its neutral state (with a zero oxidation number) to a positive oxidation state (+1). On the other hand, when silver (Ag) in AgNO3 gets one electron to create Ag, it moves from a +1 oxidation state to a neutral state (with zero oxidation number).

Silver is the element that undergoes reduction in this process because reduction entails a gain of electrons, reducing it from its +1 oxidation state to its neutral state.

To know more about oxidation state, here

brainly.com/question/31688257

#SPJ2

Answer:

D) C2H6O

Explanation:

structural formula for ethanol is :

C2H5OH or C2H6O

Answer:

[tex]\boxed{\sf C_2 H_6 O}[/tex]

Explanation:

The structural formula of ethanol is given.

There are 2 carbon atoms, 6 hydrogen atoms, and 1 oxygen atom.

The molecular formula of ethanol is [tex]{\sf C_2 H_6 O}[/tex].

Answer: 38.52 moles of hydrogen will be required to produce 19.26 mol of methane

Explanation:

To calculate the moles :

[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]    

[tex]\text{Moles of} CH_4=19.26moles[/tex]

The balanced chemical reaction is:

[tex]C+2H_2\rightarrow CH_4[/tex]

According to stoichiometry :

1 mole of [tex]CH_4[/tex] is produced by =  2 moles of [tex]H_2[/tex]

Thus 19.26 moles of [tex]CH_4[/tex] will be produced by =[tex]\frac{2}{1}\times 19.26=38.52moles[/tex]  of [tex]H_2[/tex]

Thus 38.52 moles of hydrogen will be required to produce 19.26 mol of methane