Write the rate laws and determine the units of k (the rate constant) for the following reactions: (a) The reaction A + 2B --> C is found to be second order in A and B, and third order overall. (b) The reaction 2A + B --> 3C + D is found to be one-half order in A, three-halves order in B, third order in D, and first order overall.

Answer:

p-e-n

1- Na=11-11-12

2-Cl=17-17-29

3-Mg=12-12-12

4-O=8-8-8

Explanation:

chlorine is Cl

The PEN value for sodium, chlorine, magnesium, and oxygen is (11,11,12),(17,17,18),(12,12,12), (8,8,8) respectively

The atomic number(Z) is equal to the number of protons to equal to number of electrons.

The number of neutrons is equal to atomic mass minus the atomic number

n=A-Z

For Na, Z=11, p=e=11

The number of neutrons is 23-11=12

For Cl, Z=17, e=17

The number of neutrons is A-Z=35-17=18

For magnesium, Z=12, A=24

The number of neutrons is 24-12=12

For O, Z=8, p=e=8

The number of neutrons is 16-8=8

To learn more about atomic number visit:

brainly.com/question/16858932

#SPJ1

Answer:

1. three-dimensional bonding

Diamond

2. Hardest natural substance

diamond

3. Used as lubricant

Graphite

4. nonconductor

Diamond

5. Weak, planar bonds

Graphite

6.Carbon black or soot

Amorphous

Explanation;

sorry im late, hopefully this can help somebody :)

Answer:

two reactants are critical requirement essental for reation. whereas precipitate is defined is an insoluble material produced when two aqueous solutions react with each other chemically.

Answer:  a process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in physical form or a nuclear reaction.

Explanation: hope this helps

Explanation:

NaOH (aq) + HCl(aq) ----> NaCl(aq) + H2O(l)

Stoichiometric ratio NaOH : HCl = 1:1

moles of HCl needed to be neutralized = 0.18/1000 × 32.5 = 5.85 × 10^-3 mol

So 5.85 × 10^-3 mol of NaOH should be used

If that amount is found in V volume

5.85 × 10^-3 = 0.3/1000 ×V

5.85/0.3 cm^3 = 19.5cm^3

Answer: The answer is C

Answer:

HEYYY

The reason for the noticeable difference between the actual age of the volcanic rock on Midway (27.7 million years) and the previous answer could be attributed to a few possibilities:

Inaccurate dating methods: The previous answer might have relied on an imprecise or outdated dating technique that led to an incorrect estimation of the volcanic rock's age. Geological dating methods continue to evolve and improve, and new discoveries can sometimes revise previous estimates.

Limited information or research: The previous answer might have been based on limited available information or incomplete research about the volcanic rock on Midway. New findings, additional data, or an improved understanding of the geological context could have emerged since then, leading to a more accurate estimation.

Interpretation or calculation errors: Human error in interpretation or calculation could have led to an incorrect estimation of the volcanic rock's age in the previous answer. These errors can occur due to various factors, such as misinterpretation of data, faulty assumptions, or mathematical mistakes.

Updated geological understanding: The field of geology is constantly evolving, and new insights can lead to revised understandings of geological processes. It's possible that recent research or discoveries have provided a more accurate understanding of the volcanic activity on Midway, leading to the revised age estimate of 27.7 million years.

Sample variability: Volcanic rocks can vary in age even within a localized area due to multiple volcanic eruptions over time. The previous answer might have been based on a different sample or eruption event, resulting in a different age estimate from the actual age of the volcanic rock on Midway.

It's essential to consider that scientific knowledge is subject to refinement and revision as new data and research become available. Therefore, the previous answer might have been based on the information and understanding that was current at the time, but subsequent advancements have since provided a more accurate estimation of the volcanic rock's age on Midway.

The estimate of the mean distance between two locations can be influenced by factors such as changes in plate motion and the shifting location of hotspots over millions of years. These factors can introduce variations and affect the accuracy of distance measurements.

Plate tectonics involves the movement of Earth's lithospheric plates, which can change in speed and direction over geologic time. If the rate of plate motion has varied in the past, it can result in differences in the estimated distance between two locations. For example, if the plates were moving faster in the past, the distance between the locations would have increased at a different rate compared to the present.

Additionally, the location of hotspots, which are areas of upwelling magma within the Earth's mantle, can also change over time. Hotspots can create volcanic activity and form new islands or landmasses. As the plates move over these hotspots, the islands or landmasses can be carried along, resulting in their displacement from the original hotspot location. This movement can further contribute to variations in distance measurements between locations.

It's important to consider these dynamic geological processes and their long-term effects when estimating distances or studying the evolution of Earth's features. The geological history of an area, including plate motion and hotspot activities, plays a significant role in understanding the changes and variations observed in distances between locations over millions of years.

hey i hope this helps you !! :)

Acetaldehyde is a by-product of alcohol metabolism that is highly toxic and causes many of the ill effects of alcohol consumption.

When alcohol is consumed, it is first metabolized into acetaldehyde by the enzyme alcohol dehydrogenase. Acetaldehyde is then further metabolized into acetate, which is a less harmful substance. excessive alcohol consumption can overwhelm the body's ability to metabolize acetaldehyde, leading to its accumulation and causing negative effects such as headache, nausea, and increased risk of liver damage.

                                  Therefore, it is important to consume alcohol in moderation to minimize the harmful effects of acetaldehyde.

Product of alcohol metabolism that is highly toxic and causes many of the ill effects of alcohol consumption is acetaldehyde.

When you consume alcohol, it enters your bloodstream.
The enzyme alcohol dehydrogenase breaks down the alcohol into acetaldehyde.
Acetaldehyde is highly toxic and responsible for many negative effects of alcohol consumption.
Another enzyme, acetaldehyde dehydrogenase, converts acetaldehyde into acetate, which is less harmful and can be further broken down into water and carbon dioxide.

So, the correct answer is acetaldehyde.

Learn more about Acetaldehyde

brainly.com/question/14386894

#SPJ11

A substance that changes in a chemical reaction and is represented by the reaction arrow on the left side of a chemical equation.

A substance formed in a chemical equation. and written on the right side of the reaction arrow in a chemical equation is referred to as a product. According to the law of conservation of matter, matter cannot be created or destroyed. The number of atoms of each element in the reactants must be the same as the number of atoms of each element in the products in chemical equations. The atoms and molecules that interact in a chemical reaction are referred to as reactants. The atoms and molecules produced by a chemical reaction are referred to as products.

To learn more about chemical equation. please click on below link

https://brainly.com/question/28294176

#SPJ4

To determine the molecular formula of a chemical substance given its empirical formula and molar mass, we need to compare the molar mass of the empirical formula to the molar mass of the actual molecule.

The empirical formula of the substance is CH, which implies that it consists of one carbon atom (C) and one hydrogen atom (H). The molar mass of the empirical formula CH is 12.01 g/mol (for carbon) + 1.01 g/mol (for hydrogen) = 13.02 g/mol.

Given that the molar mass of the actual molecule is 78.11 g/mol, we divide the molar mass of the actual molecule by the molar mass of the empirical formula to determine the ratio: 78.11 g/mol / 13.02 g/mol = 6.

This ratio of 6 indicates that the actual molecule contains six times the number of atoms compared to the empirical formula. Thus, the molecular formula of the substance is obtained by multiplying the empirical formula by this ratio: C1H1 * 6 = C6H6.

Therefore, the molecular formula of the chemical substance is C6H6. This corresponds to benzene, a well-known aromatic compound consisting of six carbon atoms and six hydrogen atoms arranged in a ring structure.

To know more about six carbon atoms click this link-

https://brainly.com/question/13275633

#SPJ11

Explanation:

there you go you can just look up atomic model for CD and click images

The enthalpy of the reaction is 14 J/mol.

The enthalpy of a reaction (ΔH) is the amount of energy transferred between a system and its surroundings during a chemical reaction at constant pressure, measured in joules per mole (J/mol). This value is important because it can tell us whether a reaction is exothermic or endothermic, as well as give us information about the strength of chemical bonds within the reactants and products.To calculate the enthalpy of a reaction, we need to know the amount of energy released or absorbed (Q) and the number of moles of the compound involved in the reaction (n). We can use the equation:
ΔH = Q/n
Given that 6 moles of a compound produce 84 J of energy, we can calculate the enthalpy of the reaction as follows:
ΔH = Q/n
ΔH = 84 J / 6 mol
ΔH = 14 J/mol
This means that for every mole of the compound involved in the reaction, 14 J of energy is transferred between the system and the surroundings. Since the value is positive, we can conclude that the reaction is endothermic, meaning that it requires an input of energy to occur.It is worth noting that the enthalpy of a reaction can depend on a number of factors, such as temperature, pressure, and the specific conditions under which the reaction occurs. As such, it is important to take these factors into account when calculating or predicting enthalpy values.

for such more questions on enthalpy

https://brainly.com/question/14047927

#SPJ8

decay rate of approximately 1.69x10^17 Bq (becquerels),

The decay rate of a radioactive sample is determined by the number  of radioactive atoms present and the decay constant, which represents the probability of decay per unit of time.

To calculate the decay rate, we multiply the number of atoms in the sample by the decay constant. In this case, the sample has 8.31x10^17 atoms and a decay constant of 0.203/s. Multiplying these values gives a decay rate of approximately 1.69x10^17 Bq (becquerels), which represents the number of decays per second in the sample.

Learn more about Oxygen here : brainly.com/question/13905823

#SPJ11

The balanced chemical equation for combustion of C₈H₁₈ (octane) to form CO₂ and H₂O is: C₈H₁₈ + 12.5O₂ → 8CO₂ + 9H₂O

In this reaction, octane is combined with oxygen (O₂) to produce carbon dioxide (CO₂) and water (H₂O) as products. The coefficient numbers in front of each chemical formula represent the balanced stoichiometric ratio of each compound involved in reaction. The combustion of octane is an exothermic reaction and releases a large amount of heat energy. This reaction is commonly used in combustion engines to produce energy for transportation and other applications. The combustion of hydrocarbons is an important process in the production of energy, as it releases large amounts of heat that can be used to generate electricity.

To know more about stoichiometric ratio, here

brainly.com/question/29841194

#SPJ4

The first step in managing elemental metal burns is to covering the affected area in mineral oil, sand, or foam from a Class D fire extinguisher. Option (c)

The most appropriate next step for the 45-year-old chemist who spilled elemental sodium on his left hand and forearm would be copious irrigation with water. Sodium reacts explosively with water, forming sodium hydroxide and hydrogen gas.

Therefore, it is essential to wash the affected area with copious amounts of water to neutralize the sodium and prevent further injury. Covering the affected area with mineral oil or applying topical calcium gluconate would not be effective in this scenario. Intravenous fluid resuscitation may be necessary depending on the severity of the injury, but it is not the most appropriate next step.

Learn more about  metal burns

https://brainly.com/question/20200492

#SPJ4

Full Question: A 45-year-old chemist presents to the emergency department after accidentally spilling elemental sodium on his left hand and forearm 30 minutes prior to arrival. What is the most appropriate next step?

A. Application of topical calcium gluconate

B. Copious irrigation with water

C. Cover the affected area with mineral oil

D. Intravenous fluid resuscitation

Answer:

mark me brainlest

Explanation:

Electronegativity values generally increase from left to right across the periodic table. Electronegativities generally decrease from top to bottom of a group. The highest electronegativity value is for fluorine.

Answer:

       "Electronegativity increases as you move from left to right across a period because the number of charges on the nucleus increases." (sstudy30 on Quizlet)

Explanation:

    It explains itself haha!

Have a nice day!

    I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)

- Heather

Answer: Electrolysis is defined as the process by which electrolyte allows electric current to pass through it and is decomposed in the process.

Explanation:

Substances that allow the passage of electric current are known as conductors. Examples of conductors are metals, graphites. Metals are good conductors of electricity of which an example is LEAD.

Lead is a metal which can be extracted through the process of electrolysis. A substance in solution or liquid state like lead (II) bromide which allows electric current to pass through it and at the same time decompose by it is known as an ELECTROLYTE.

In the electrolysis of lead (II) bromide to obtain Lead,the electrolyte ionize into positive and negative ions. The positive ions migrate to the cathode and are known as captions. The negative ions migrate to the anode and are known as anions.

--> At the CATHODE: Pb2+ gains electrons and Lead is deposited

Pb2+(aq) + 2e -----> Pb(s)

--> At the anode: Br- gives up electrons and is liberated as bromine vapour.

2Br- (aq) ------> Br2(g) + 2e.

Atomic size or radius refers to the distance between the nucleus of an atom and its valence electrons. The size of an atom increases as you move down a group and decreases as you move across a period in the periodic table.

The correct order of Strontium, tin, and iron by increasing atomic size is:

Iron < Tin < Strontium

Iron has the smallest atomic radius among the three elements, followed by tin, and then strontium, which has the largest atomic radius. This is because strontium is located in the third row of the periodic table, while iron and tin are located in the fourth and fifth rows, respectively. As we move down a group, the number of energy levels or shells increases, leading to an increase in atomic size. Therefore, strontium has the largest atomic size among the three elements.

for more such questions on Atomic

https://brainly.com/question/27679218

#SPJ11

When an atom becomes an anion it loses ions, so its becoming smaller

Answer:

m=0.000107 kg

Explanation:

H=m*cp*change in temperature

0.296=m*4182*0.661

m=0.000107 kg

Answer:

I think B but I'm not sure.

Answer:

C.

Explanation:

Answer: both the different glycosidic linkages of the molecules and the different hydrogen bonding partners of the individual chains.

Explanation:

Glycogen is a polysaccharide of glucose which is a form of energy storage in fungi, bacteria and animals. Glycogen is primarily stored in the liver cells and skeletal muscle.

The difference in interchain stability between the polysaccharides glycogen and cellulose is due to the different glycosidic linkages of the molecules and the different hydrogen bonding partners of the individual chains.

The diameter of a liquid droplet suspended in zinc vapor such that the vapor pressure has doubled, we need the specific values for surface tension (σ) and molar volume (V) of the liquid. Unfortunately, these values are not provided in the question.

To calculate the diameter of a liquid droplet suspended in zinc vapor such that the vapor pressure has doubled, we need to use the relationship between the vapor pressure and the diameter of the droplet. The equation that relates these two quantities is known as the Kelvin equation:

ΔP = (2σV) / r

where ΔP is the change in vapor pressure, σ is the surface tension of the liquid, V is the molar volume of the liquid, and r is the radius of the droplet.

In this case, the vapor pressure has doubled, so we have:

ΔP = 2P

where P is the initial vapor pressure.

Rearranging the Kelvin equation, we can solve for the radius:

r = (2σV) / ΔP

Now, let's plug in the given values:

Initial vapor pressure, P = 150 (units not specified)
Surface tension, σ = (depends on the liquid used)
Molar volume, V = (depends on the liquid used)
Change in vapor pressure, ΔP = 2P

Since the values for surface tension and molar volume are not given, we cannot calculate the exact diameter of the droplet. These values depend on the specific liquid being used.

To obtain the diameter, we would need to know the specific values for σ and V, which are properties of the liquid. Once we have those values, we can substitute them into the equation and solve for the radius. Then, we can double the radius to get the diameter of the droplet.

In summary, to calculate the diameter of a liquid droplet suspended in zinc vapor such that the vapor pressure has doubled, we need the specific values for surface tension (σ) and molar volume (V) of the liquid. Unfortunately, these values are not provided in the question.

learn more about diameter on :

https://brainly.com/question/28162977

#SPJ11

AnswerDo you have a picture of the chart

Explanation:

To perform the procedure, slowly add the calculated amount of 0.2 F AgNO3 from a buret while maintaining constant stirring. Additionally, incorporate a 10% excess of AgNO3 as directed by the instructor.

In this procedure, the objective is to add a specific amount of 0.2 F AgNO3 solution with constant stirring. The use of a buret allows for precise control over the volume being added. By adding the solution slowly, the reaction can be monitored and controlled more effectively.

Furthermore, it is mentioned that a 10% excess of AgNO3 should be added. This means that an additional 10% of the calculated amount of AgNO3 should be incorporated. The purpose of this excess is to ensure that all the reactants are fully consumed, promoting a complete reaction and maximizing the desired outcome.

The instructor will provide the 0.2 M AgNO3 solution, which is a solution with a known concentration. This concentration allows for accurate calculations of the required volume to achieve the desired amount of AgNO3.

Learn more about excess of AgNO3

brainly.com/question/10052452

#SPJ11

As a result, when two objects are close together and have enormous masses, their gravitational attraction is strongest.

According to Newton's law of universal gravitation, any two bodies in the universe are attracted to one another by a force that is inversely proportional to the square of the distance between them and a direct relationship between their mass products In other words, every particle of matter in the cosmos is attracted to every other particle by a force that is inversely proportional to the square of the distance between them and proportionate to their masses. Sir Issac Newton created the law in 1687.

According to their masses and separation, two objects will gravitationally pull one another.

The attractive force between two objects (F) is determined by Newton's law of universal gravitation and is equal to G times the product of their masses (m1m2) divided by the square of their distance

(r2), or F = Gm1m² / r2².

As a result, when two objects are close together and have enormous masses, their gravitational attraction is strongest.

To know more about newton law visit:

brainly.com/question/15280051

SPJ1

The number of mole of air in the ball, given that the volume of the ball is 5.2 litres is 0.13 mole (Option A)

We'll begin by listing out the given parameters from the question. This is given below:

From the above parameters, we can obtain the number of mole as follow

PV = nRT

61 × 5.2 = n × 8.314 × 305

317.2 = n × 2535.77

Divide both sides by 2535.77

n = 317.2 / 2535.77

n = 0.13 mole

Thus, the number of mole is 0.13 mole (Option A)

Learn more about number of mole:

https://brainly.com/question/16259909

#SPJ1

For a reaction with ah < 0, it means that the enthalpy change of the reaction is negative, indicating an exothermic process where energy is released. In such a reaction, the bonds broken are typically stronger than the bonds formed, as the energy released is due to the formation of stronger bonds.

Breaking a strong bond requires more energy than forming a weak bond, and therefore the excess energy is released in the form of heat. It is also worth noting that in most cases, not all bonds are broken in a reaction. Only the bonds involved in the reactants are broken, and new bonds are formed to create the products. The type of bond breaking can also vary, with heterolytic bond breaking being more common than homolytic bond breaking. Heterolytic bond breaking occurs when one atom in the bond retains both electrons, while the other atom receives none.

This results in the formation of ions, which are often involved in further reactions. Homolytic bond breaking, on the other hand, occurs when each atom in the bond receives one electron, resulting in the formation of free radicals that can also react further.

To know more about the Exothermic Process visit:

https://brainly.com/question/29555731

#SPJ11