Which one of the following is not the property of graphite?

A. Soft

B. Greasy

C. Transparent

D. Black

​

Answer:

A. Carbon and oxygen are chemically bonded in it.

Explanation:

I saw someone with the exact question and they said A so yea ♥

The period 2 element which has IE similar to the data provided to us is Boron.

To remove the lost electron, the least amount of energy is needed. A bigger amount of energy is needed to remove an electron if it is nearer the nucleus.

The stability of the valance shell causes an increase in ionization energy if we move our gaze from left to right over time.

According to the given data,

IE₁ = 801

IE₂ = 2427

IE₃ = 3659

IE₄ = 25,022

IE₅ = 32,822

To determine the electron configuration, we need to consider the Aufbau principle, which states that electrons fill the lowest energy levels available before moving to higher energy levels. The electron configuration can be written as follows:

1s² 2s² 2p¹

This electronic configuration indicates the element is Boron.

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Answer:

molecules

please tell me if this is wrong you I don't know which lesson your on to be able to answer this with 100% confidence

Answer:

violet

Explanation:

hope this helps!

Answer:

The correct answer is C

Explanation:

light refracts whenever it travels at an angle into a substance with a different refractive index(optical density)

a. The titration between a strong acid and a strong base is represented by the combination of HCI (strong acid) and NaOH (strong base).

b. The titration between a weak acid and a strong base is represented by the combination of HCOOH (weak acid) and NaOH (strong base).

In a titration, a solution of known concentration (titrant) is gradually added to a solution of unknown concentration (analyte) until the reaction between the two is complete. The equivalence point is reached when stoichiometrically equivalent amounts of acid and base have reacted.

Since, HCI is a strong acid, and NaOH is a strong base. Therefore, the combination of HCI and NaOH represents the titration between a strong acid and a strong base.

HCOOH is a weak acid, and NaOH is a strong base. Therefore, the combination of HCOOH and NaOH represents the titration between a weak acid and a strong base.

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Answer: 1 and 2

i think

Explanation:

Reduction reactions cause the loss of oxygen, and the process is being used in a variety of ways. For example, the reduction reaction method is used to reduce ores.

Create electrochemical cells and convert ammonia into nitric acid to acquire metals. An instance of a chemical process in which reduction and oxidation take place simultaneously is known as a reduction-oxidation or redox reaction. In contrast to oxidized species, reduced species gains electrons. Oxygen is not required for an oxidation process.

The chemical element with the letters O and the atomic number 8 is called oxygen. It belongs to the periodic table's chalcogen group and is a very reactive nonmetal.

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The complete question is -

What happens during reduction reaction?

The electrochemical gradient is used to import K ions through selective potassium channels and NO₃⁻ ions through cotransport mechanisms, where the energy from the electrochemical gradient of another ion drives their import.

To  explain how the electrochemical gradient is used to import potassium (K) and nitrate (NO₃⁻) ions through channels and cotransport mechanisms:

1. An electrochemical gradient is created by the differences in ion concentration and electrical potential between the inside and outside of a cell. This gradient provides the driving force for the movement of ions across the cell membrane.

2. To import K ions, cells use channels called potassium channels. These channels are selective for K ions and allow them to pass through the membrane down their electrochemical gradient, moving from an area of high concentration to an area of low concentration.

3. For NO₃⁻ import, cells use a cotransport mechanism. In this process, the electrochemical gradient of another ion, typically H⁺ or Na⁺, is used to drive the transport of NO₃⁻ into the cell. This occurs through a cotransporter protein, which binds both ions simultaneously.

4. When the cotransporter protein binds the driving ion (H⁺ or Na⁺) and NO₃⁻, the electrochemical gradient of the driving ion provides the energy required for the import of NO3- into the cell, even if it is against its own electrochemical gradient

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Answer:

motion which is kenetic energy D

The true statement among the options provided is: Rate constants are affected by changes in temperature.

Rate constants are influenced by temperature according to the Arrhenius equation. An increase in temperature generally leads to an increase in the rate constant, resulting in a faster reaction rate. This relationship is described by the Arrhenius equation, which states that the rate constant (k) is exponentially proportional to the temperature (T) and the activation energy (Ea) of the reaction.

- The statement "The rate-determining step in a reaction mechanism is the fastest step" is repeated twice. Nonetheless, it is not always true that the rate-determining step is the fastest step. The rate-determining step is the slowest step in a reaction mechanism and limits the overall rate of the reaction.

- The statement "The presence of a catalyst changes the enthalpy of a reaction" is incorrect. A catalyst does not alter the enthalpy (heat) of a reaction; it provides an alternative reaction pathway with a lower activation energy, which facilitates the reaction to proceed at a faster rate. The enthalpy of the reaction remains the same with or without a catalyst.

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The statement "All hair color products are organic chemicals" means that they contain carbon and hydrogen, which is option C.

Organic chemicals are defined as any chemical compound that contains carbon and hydrogen atoms. This definition includes a vast array of molecules, including many found in nature, such as carbohydrates, lipids, and proteins.

Hair color products, whether they are labeled as "organic" or not, contain organic chemicals because they are designed to alter the color of hair by chemically interacting with the hair shaft. These chemicals typically include dyes or pigments that are dissolved in a solvent or carrier, such as alcohol or water. Other ingredients may also be included, such as alkalizing agents, conditioners, and preservatives.

While the term "organic" is often used to describe products that are considered natural or healthy, it does not necessarily mean that the product is free from synthetic or artificial ingredients. In fact, many organic hair color products still contain synthetic ingredients, and some natural ingredients can be harmful if used improperly.

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Answer:

25.72 i know this because i have donedd this before hope you get it correct

Explanation:

Answer:

smoother and less jagged

Explanation:

Answer:

1

Explanation:

one possible way its just a theory of what the answer could be

Answer:

3-a factual statement

Explanation:

A hypothesis is a factual statement to explain a set of observations.

The major organic product obtained from the following sequence of reactions is ethylbenzene (C8H10).

The given sequence of reactions can be represented as follows:naoch2ch3 + ch3ch2oh → ch3ch2ona + ch3ch2oh → ch3ch2och2ch3 (diethyl ether)ch3ch2och2ch3 + phbr → C6H5CH2CH2OCH2CH3 + NaBrThe overall reaction is:naoch2ch3 + ch3ch2oh + phbr → C6H5CH2CH2OCH2CH3 + NaBrThe final product is diethyl benzyl ether, which can be represented as C6H5CH2CH2OCH2CH3.

It is the etherification product of benzyl alcohol and diethyl ether. The benzyl group gets attached to the oxygen of diethyl ether to form diethyl benzyl ether.The main answer is diethyl benzyl ether while the summary of the reaction can be presented as follows:NaOCH2CH3 and CH3CH2OH react to form CH3CH2OCH2CH3 (diethyl ether).When NaOCH2CH3 and CH3CH2OH react, they produce diethyl ether (CH3CH2OCH2CH3) as a product

When diethyl ether reacts with PhBr (bromobenzene), it forms diethyl benzyl ether. The structure of diethyl benzyl ether is C6H5CH2CH2OCH2CH3.

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Answer:

in w

Explanation:

first blood enter renal artery which enter glomerous( where blood is filtrated) and then to Bowman carpusle(take the filtrated blood)

and then to proximal tubular(absorbed salt) and then to loop of hanle (y)(absorb water) and then to distal tubule then to ureter (z) and then to renal vein(x)(to go to urinary bladder)

Option (b) K + Br₂  → 2KBr is the chemical reaction that does not follow the law of conservation of mass.

According to the law of conservation of mass or principle of mass conservation in physics and chemistry, any system that is closed to all transfers of matter and energy must have a constant mass over time because the mass of the system cannot change, meaning that neither more nor less of the quantity can be added or taken away.

The Law of Conservation of Mass has been in force ever since Antoine Lavoisier discovered that mass is neither created nor destroyed during chemical reactions. For instance, the carbon atom in coal burns and becomes carbon dioxide. Although the carbon atom's shape changes from solid to gas, its mass remains constant.

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The elasticity coefficient for an enzyme in the multistep pathway will depends on the concentration of the enzyme itself and the amounts of the substrate molecules present at each step. Option D is correct.

The elasticity coefficient is a measure of the sensitivity of the rate of the overall reaction to changes in the concentrations of the individual enzymes or substrates in the pathway. A higher elasticity coefficient indicates that the reaction rate is more sensitive to changes in that particular component.

In a multistep pathway, the elasticity coefficient of each enzyme depends on its own concentration as well as the concentrations of the substrates and products that it interacts with in its particular step of the pathway.

Therefore, both the concentration of the enzyme and the amounts of substrate molecules present at each step can affect the elasticity coefficient of an enzyme in a multistep pathway. The levels of regulatory molecules (option B) may also affect the elasticity coefficient of an enzyme, but this is not the only factor that determines it.

Hence, D. is the correct option.

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The reaction between pottasium metal and chlorine gas is a combination reaction and it is as follows;

2K + Cl₂ → 2KCl

A chemical reaction is a process involving the breaking or making of interatomic bonds, in which one or more substances are changed into others.

A chemical reaction is said to be a combination reaction when two or more atoms are joined together to form a compound. An example is the reaction of pottasium metal and chlorine gas to produce pottasium chloride as follows:

2K + Cl₂ → 2KCl

In the above equation, two elements; pottasium chemically combines with chlorine to form a compound; pottasium chloride.

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The mass of NH₃ dissolved in 475 g of methanol to make a 0.250 mole/kg solution is 2.02 g.

To determine the mass of NH₃ dissolved in methanol, we can use the molarity of the solution and the formula weight of NH₃.

Molarity (M) = moles of solute / liters of solution

Given the molarity of 0.250 mole/kg, we can convert this to moles of solute using the mass of methanol as the volume of the solution:

0.250 mole/kg = n moles / (475 g / 1000 g/kg)

Rearranging, we find that n = 0.250 x (475 g / 1000 g/kg) = 0.11875 moles

Now we can use the formula weight of NH₃, which is 17.0 g/mole, to find the mass of NH₃:

0.11875 moles x 17.0 g/mole = 2.02 g

So, the mass of NH₃ dissolved in 475 g of methanol to make a 0.250 mole/kg solution is 2.02 g.

Solutions can be either liquid, gas or solid. The properties of a solution depend on the nature of the solute and solvent, as well as the concentration of the solute in the solvent. Solutions can be made by dissolving the solute in the solvent, or by mixing two or more solutions together. The solute is said to be "dissolved" in the solvent if it forms a stable mixture that does not separate over time. solution is a mixture of two or more substances in which one substance, called the solute, is dissolved in another substance, called the solvent. The solute and solvent are thoroughly combined and create a homogeneous mixture, where the solute is evenly distributed throughout the solvent.

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Answer:

Forces acting on an object may be balanced or unbalanced. When the forces  acting on an object have equal strength and act in opposite directions, they  are balanced. These forces cancel out one another, and the motion of the  object does not change.  When the forces acting on an object are unbalanced, they do not cancel out  one another. An unbalanced force acting on an object results in the object’s  motion changing. The object may change its speed (speed up or slow down), or it may change its direction.  Friction is a force that resists the motion or the tendency toward motion  between two objects in contact with each other.  Gravity is a force that pulls objects toward one another. For example, Earth  pulls all objects toward it.

Explanation:

Answer:

The Machine exerts a force of 9N.

Explanation:

Initial velocity (u) = 0 m/s

Final velocity (v) = 30 m/s

Time (t) = 0.5 s

Acceleration (a) = (v-u)/t

= (30-0)/0.5 m/s²

= 30/0.5 m/s²

= 60 m/s²

Mass = 0.15 kg

Force = Mass*Acceleration

= 0.15*60 N

= 9 N

Answer:

The Machine exerts a force of 9N.

Explanation:

Plato

Answer:  A. \(0.00301J/g^0C\)

Explanation:

The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.

\(Q=m\times c\times \Delta T\)

Q = Heat absorbed  = 4.56 J

m = mass of substance = 123 g

c = specific heat capacity = ?

Change in temperature ,\(\Delta T=T_f-T_i=12.32^0C\)

Putting in the values, we get:

\(4.56J=123g\times c\times 12.32^0C\)

\(c=0.00301J/g^0C\)

The specific heat of a 123 g substance that requires 4.56 J of heat in  order to increase its temperature by 12.32 °C is \(0.00301J/g^0C\)

Answer:

Molar mass of H2CO3 : 62.03 g/mol

Answer:

The direct object is the thing that the subject acts upon, so in that last sentence, “cereal” is the direct object; it's the thing Jake ate  An indirect object is an optional part of a sentence; it's the recipient of an action.

Explanation:

The artificial sweetener's empirical formula and the molecular formula are C₁₄H₁₈N₂O₅. Therefore, option C is correct.

An empirical formula is a chemical formula for a compound that provides the proportions (ratios) of the elements present but not the exact number or arrangement of atoms.

The empirical formula of an artificial sweetener is given as C₁₄H₁₈N₂O₅ and the molecular mass as 294.34 g/mol.

The molecular formula is written as n×(Empirical formula) where n=(molecular mass)÷ (Empirical mass).

First, find the empirical mass,

\(\begin{aligned}\mathrm{Empirical\;mass\;of\;C_{14}H_{18}N_2O_5}& = 12\times14+1\times18+14\times2+16\times5\\&=\mathrm{294\;g/mol}\end{aligned}\)

Then, we get the n value as follows,

n= 294.34 g/mol÷ 294g/mol

n=1

Then, the molecular formula is, 1×C₁₄H₁₈N₂O₅.

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Answer:

C

Explanation:

edge 2023

One primary source of food contamination by cadmium in Japan is the soil. Cadmium is a naturally occurring element that can be found in soil, and it can be absorbed by plants as they grow.

Certain regions of Japan have high levels of cadmium in the soil due to geological and environmental factors, and crops grown in these areas can be contaminated with cadmium. Rice is a staple food in Japan, and it is particularly susceptible to cadmium contamination due to its growing conditions. Cadmium can accumulate in the grain of rice, especially if it is grown in soil that is contaminated with cadmium. As a result, rice is a major source of cadmium exposure for people in Japan.

In addition to rice, other foods that are commonly contaminated with cadmium in Japan include shellfish, seaweed, and some types of mushrooms. These foods can also absorb cadmium from the soil or water in which they are grown or harvested.

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Mass of liquid present in the container:

Yes, the liquid will be present, and of 1.2481 g

Calculation:

Given:

Volume = 1.5L

Temperature = 25 + 273 = 298K

P = 23.76 torr = 0.0312 atm

Using the ideal gas equation:

PV = nRT

Where:

making n subject of formula:

n = \(\frac{PV}{RT}\)

By putting all the values in the given equation, we get,

n = 0.0312 x 1.5 / 0.0821 x 298

n = 0.0019 moles

So, 0.00189 are moles of water in the vapor

Now, subtract  1.25g of water from moles of water vapor, and we will get the mass of the liquid left,

1.25 - 0.0019 = 1.2481 g

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