Draw n‑ethyl‑3‑methylpentanamide. Include all hydrogen atoms

Answer:

I guess the answer ia point A

Answer:

eight because I think it's eight

Based on the observations of the students, the soil they observed appears to be a sandy soil.

What is Foamy?

Foamy refers to the presence of bubbles or foam in a liquid or substance. It can be caused by a variety of factors, such as agitation, the presence of certain chemicals, or the release of gases. In the context of the soil observation mentioned earlier, the lack of foamy reaction with vinegar suggests that the soil does not contain a significant amount of carbonates, which are a common cause of foaming when they react with acids.

Evidence to support this includes the fact that the soil is gritty when dry and sticks to their fingers when wet, which are both common characteristics of sandy soil. Additionally, the observation that the soil does not get foamy with vinegar suggests that it does not contain a lot of organic matter, which is another characteristic of sandy soil. Finally, the fact that the damp soil made a ball but it fell apart quickly suggests that the soil does not have a lot of clay, which is another characteristic of sandy soil.

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Answer:

the answer is electrons

Explanation:

electrons are responsible for the chemical bonding.

Answer:

Because X-rays have wavelengths similar to the size of atoms

X rays are used to probe the crystal structure of a material because this have same wavelength as atoms of crystal have.

X rays are the type of electromagnetic radiations and it is produced when the fast moving electron collide with the target anode and sudden deceleration takes place.

X rays have the high energy so that it easily penetrate in any crystal molecule as they also have same wavelength as atoms of the crystals have.

Hence due to high energy and same wavelength was of atoms of crystal it is used to probe the crystal.

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Answer:

The Lewis structure indicates that each Cl atom has three pairs of electrons that are not used in bonding (called lone pairs) and one shared pair of electrons (written between the atoms). A dash (or line) is sometimes used to indicate a shared pair of electrons: A single shared pair of electrons is called a single bond.

Explanation:

When the initial concentration of crystal Violet is double, the rate of the reaction will rise up about four times the initial rate.

The rate of a chemical reaction refer to the rate of change in concentration of the reaction over the change in time. Introduction.

When you double the concentration the rate doubles. The rate is proportional to the square of the concentration of a reactant. When the rate is doubled the concentration rate goes up four times. The rate is not affected by the concentration of a reactant.

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When doubling the initial concentration of crystal violet, the rate will increase four times.

The rate doubles when the concentration is doubled.

The rate is proportional to the square of a reactant's concentration. When the concentration is doubled, the rate increases fourfold.

The concentration of a reactant has no effect on the rate.

Thus, when doubling the initial concentration of crystal violet, the rate will increase four times.

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The number of moles of each atom present in 5 moles of Cu₃(PO₄)₂ are:

The moles of atom present in 5 moles of Cu₃(PO₄)₂ can be obtained as follow

1 mole of Cu₃(PO₄)₂ contains 3 moles of Cu.

Therefore,

5 moles of Cu₃(PO₄)₂ will contain = 5 × 3 = 15 moles of Cu

1 mole of Cu₃(PO₄)₂ contains 2 moles of P.

Therefore,

5 moles of Cu₃(PO₄)₂ will contain = 5 × 2 = 10 moles of P

1 mole of Cu₃(PO₄)₂ contains 8 moles of O.

Therefore,

5 moles of Cu₃(PO₄)₂ will contain = 5 × 8 = 40 moles of O

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The number of moles of copper, phosphorous and oxygen present in the 5 moles of Cu₃(PO₄)₂ are 15, 20 and 40 respectively.

Stoichiometry of any chemical equation gives idea about the amount of species present before and after the reaction.

Dissociation reaction of Cu₃(PO₄)₂ is shown as below:
Cu₃(PO₄)₂ → 3Cu²⁺ + 2PO₄³⁻

From the stoichiometry of the equation, it is clear that:

1 mole of Cu₃(PO₄)₂ produces 3 moles of copper atom, 2 moles of phosphorous atoms an 8 moles of oxygen atom.

5 moles of Cu₃(PO₄)₂ = produces 3×5=15 moles of Cu

5 moles of Cu₃(PO₄)₂ = produces 2×5=10 moles of P

5 moles of Cu₃(PO₄)₂ = produces 8×5=40 moles of O

Hence required moles of copper, phosphorous and oxygen are 15, 20 and 40 respectively.

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Answer:

Chemical reaction occurs when chemical bonds between atoms are formed or broken . The substance that go into a chemical reactions are called reactants, and the substance produced at the end of the reaction are known as the product .

The coefficients which correctly balance the formula for the equation of reaction of NH₄ and NO₂ is 1,1,1,2.

This is the type of reaction in which the atoms of the elements of the reactants equal that of the product.

The balanced reaction is seen below where 2 was added to H₂O so as to balance the atoms of oxygen on both sides.

NH₄ + NO₂ (s) ⇒ N₂ (g)+2H₂O(l)

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Answer:

22.4

Explanation:

The world is divided into large areas based on their average temperatures and precipitation is called climate zones.

The principal zones that are demarcated by lines of latitude due to which the earth can be divided on the basis of climate. Tropical zone, Subtropics zone, Temperate zone and Cold zone are the four types of climatic zones.

So we can conclude that large areas based on their average temperatures and precipitation is called climate zones.

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The world is divided into large areas called climate zones based on their average temperatures and precipitation.

Climate zones are areas of the Earth that results from differences in climate such as temperature, humidity, amount of precipitation etc.

Climate zones of the globe are as follows:

Therefore, it can be said that the world is divided into large areas called climate zones based on their average temperatures and precipitation.

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Answer:

Explanation:

Image result for Summarize: What do you think would happen to the convection currents in the atmospheres and along the coastlines of the surface of the Earth warmed up? Do you think this could have any affect on the convection in the mantle? Why or why not? Your answer should be at least 3 sentences in length,

As the magma cools and solidifies, the convection currents will stop and the Earth will become geologically dead.

Triangles may be regarded as similar or congruent on the following basis;

1) Side angle side (SAS)

2) Side side side (SSS)

3) Angle Angle side (AAS)

A triangle is a three sided figure. The figures are not shown here. However, two triangle may be regarded as similar or congruent by the following conditions;

1) Side angle side (SAS)

2) Side side side (SSS)

3) Angle Angle side (AAS)

Since the triagles are not shown here, the similarity of the triangles can not be established.

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Answer:

They are food for some animals. Some animals use them for nesting material. Humans can dry and burn some types of nonvascular plants as a fuel.

Explanation:

Some nonvascular plants produce various nutrients that are passed to the soil and can be used by other plants. Also, nonvascular plants that cover a large surface area help maintain the cohesion of the land by reducing the risk of erosion. Nonvascular plants are also very important to animals.

                                                  Hope it helps

                                                      Be great

The  standard change in free energy is -35.76 kJ/mol. Values of standard free energy are obtained from thermodynamic tables.

The standard change in free energy can  be obtained using the relation;

ΔG°= ΔH° - TΔS

When;

ΔH°f(HI) = 26.466 kJ/mol

ΔH°f(H2) = 0 kJ/mol

ΔH°f(I2) = 0 kJ/mol

ΔS°f(HI) = 221.63 J/K/mol

ΔS°f(H2) = 145.64 J/K/mol

ΔS°f(I2) = 0 J/K/mol

Hence;

ΔH°freaction = [ 2(26.466)] - 0

= 52.932 kJ/mol

ΔS°freaction = [2(221.63 ) ] - [145.64 + 0]

= 443.26 - 145.64 = 297.62 J/K/mol

ΔG°= 52.932 * 10^3 - [298 * 297.62 ]

ΔG°= -35.76 kJ/mol

The  standard change in free energy is -35.76 kJ/mol.

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The change in free energy for the given chemical reaction between hydrogen and iodine gas is -31.068 kJ/mol.

Free energy change of any reaction will be calculated by using the below equation:

ΔG° = ΔH° - TΔS, where

ΔH° = change in enthalpy

T = absolute temperature = 298K

ΔS = change in entropy

Change in any quantity during the reaction will be find out by substracting the reactant values from product values.

Given chemical reaction is:

H₂(g) + I₂(g) → 2HI(g)

ΔH° = 2(26.466)] - 0 = 52.932 kJ/mol

ΔS = [2(206.6) ] - [131 + 0] = 413.2 - 131 = 282.2 J/K.mol = 0.282 kJ/K.mol

On putting values on above equation, we get

ΔG° = 52.932 - (298)(0.282) = -31.068 kJ/mol

Hence required free enrgy is -31.068 kJ/mol.

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Paul J. Chirik developed methods associated with chemistry catalysis and transition metals, which may result useful for the development of manufacturing technologies.

Catalysis refers to the chemical processes that increase the rate of different types of reactions by lowering its activation energy.

Proteins (enzymes) are biological catalysts that increase the rate of chemical reactions in biological systems.

Catalysis may be reached by using transition metals (e.g., actinium and rutherfordium), which result useful in the development of manufacturing technologies.

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Based on the calculations, the approximate ductility (%el) of this brass is equal to 2.3%.

Given the following data:

Ductility can be defined as an important property of a material which determines its ability to become elongated due to the application of stress.

Mathematically, the ductility of a material can be expressed as percentage elongation in length:

[tex]\% el = \frac{\Delta L}{L_i} =\frac{L_f - L_i}{L_i}[/tex]

Where:

For this exercise, let us assume the original length of this brass is equal to 100 meters.

Substituting the parameters into the formula, we have;

[tex]\% el = \frac{230}{100}[/tex]

Ductility = 2.3%.

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The approximate ductility (%el) of a brass that has a yield strength of 230 mpa is 2.3%.

Approximate ductility of any substance will be calculated by using the below equation as:

%el = ΔL / L₁, where

On putting this values, we get

%el = 230/100 = 2.3%

Hence 2.3% is the approximate ductility.

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Answer: C

Explanation:

C just because the other choices dont really make sense. They use these fibers as a way to see what clothes, shoe strings, carpets, etc was there it help identify a person at the scene. Hope this helps!!

Answer:

carbon = 3

hydrogen=5

nitrogen=3

Oxygen=9

Answer:

1. mechanical energy

2. Kinetic energy

3. Energy

4. Work

5. potential energy

Explanation:

1. The total amount of mechanical energy is merely the sum of the potential energy and the kinetic energy. This sum is simply referred to as the total mechanical energy 
2. All moving objects have kinetic energy. When an object is in motion, it changes its position by moving in a direction: up, down, forward, or backward.

3. Energy is defined as the ability to cause changes in matter. You can change energy from one form to another when you lift your arm or take a step. In each case, energy is used to move matter — you. The energy of moving matter is called kinetic energy.

4. transfer of energy that occurs when a force makes an object move. For work to occur, an object must move. The motion of the object must be in the same direction as the applied force on the object.

5. potential energy is the energy that is stored in an object due to its position relative to some zero position. An object possesses gravitational potential energy if it is positioned at a height above (or below) the zero height.

Answer:

The links are: the number of circles in the electronic configuration of an element is represented in the periodic table as the period number that element is situated in. the number of electrons in the outermost shell of an element is represented in the periodic table as the group number that element is situated in.

Explanation:

The medium that might be used to cool the hot liquid coming from a reactor is : ( C ) Heat exchanger

Heat exchanger is used  for the transfer of heat between liquids to be used in a chemical reaction, It can be used for both Cooling and heating to achieve the desired temperature.

The liquid coming from a reactor which posses a very high temperature will be passed through the heat exchanger so that its temperature will attain the required temperature for the experiment.

Hence we can conclude that The medium that might be used to cool the hot liquid coming from a reactor is Heat exchanger.

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Another advantage of advantage of using a microspectrophotometer to analyze fibers asides not causing damage to the sample is that the sample can be quite small.

Microspectrophotometry is a biological technique used to measure the absorption or transmission spectrum of a solid or liquid material in either transmitted or reflected light.

Microspectrophotometry can also measure the emission of light by a sample, which is usually small as the micro implies.

One advantage of microspectrophotometry is that the sample does not get damaged. However,

However, another advantage of advantage of using a microspectrophotometer to analyze fibers asides not causing damage to the sample is that the sample can be quite small.

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Answer:

2 , 3 and 4

Explanation:

hope this helps you

D. Elements within a group have similar properties.

For a buffer is composed of 33. 80 ml of 0. 164 m acetic acid and 31. 63 ml of 0. 189 m sodium acetate,The volume of HCl is mathematically given as

v1=70.1148mL

Generally, the equation for the Chemical reaction is mathematically given as

HCl+CH3Coo-Na---->CH3CooH+NaCl

Therefore

Mole of HCl=34.37*0.204*10^-3

Mole of HCl=7.011*10^-{-3}

In conclusion

M1v1=m2v2

Therefore

[tex]v1=\frac{m2v2}{m1}\\\\v1=\frac{7.011*10^-{-3}}{0.1}[/tex]

v1=70.1148mL

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70.114 ml of 0. 100 m HCl can be added before the buffer capacity is reached

Volume is the space occupied by a three-dimensional object.

The chemical reaction is

[tex]\rm HCl+CH_3Coo-Na---- > CH_3CooH+NaCl[/tex]

step1, calculate the moles of HCl

[tex]34.37 \times0.204\times 10^-3[/tex]

[tex]\rm Moles\; of\; HCL \;7.011\times 10^{-3}[/tex]

The given Volume 1 is 33.80 ml

The given volume 2 is 31.63 ml

By the formula, [tex]M_1V_1=M_2V_2[/tex]

Putting the values in the equation

[tex]0.164 \times 33.80 = 100 \times V_2\\\\V_2 = 70.114 ml.[/tex]

Thus, the final volume is 70.114 ml.

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v1=70.1148mL