One event in a high school track meet is the 400 meter run. If the runners of the 400
meter event start and end at the same location, what is their DISTANCE?
0 meters
© 200 meters
0 400 meters
800 meters

Answer:

A. The green light is absorbed

P₄ + 10Cl₂ → 4PCl₅  is the balanced chemical equation for the reaction of chlorine gas and solid phosphorus combine to form phosphorus pentachloride gas.

An equation for a chemical reaction is said to be balanced if both the reactants and the products have the same number of atoms and total charge for each component of the reaction.

In other words, both sides of the reaction have an equal balance of mass and charge.

Chlorine gas' chemical formula is Cl₂. Phosphorus solid has the chemical formula P₄.

The chemical formula for phosphorus pentachloride is PCl₅.

Now, here is what the UNBALANCED response will be:

P₄ + Cl₂  → PCl₅.

The equation needs to be balanced:

1. Since we used 4 solid phosphorous atoms as reactants, the final product should also include 4 phosphorus atoms.

P₄ + Cl₂ → 4PCl₅

2- There are currently 20 chlorine atoms in the end products, but only 2 chlorine atoms in the reactants. Therefore, to balance the equation, we need to multiply Cl₂ by 10.

P₄ + 10Cl₂ → 4PCl₅

Following is the final, balanced equation:

P₄ + 10Cl₂ → 4PCl₅

Learn more about Balanced chemical equation here https://brainly.com/question/26694427

#SPJ4

Answer:3

Explanation:

Answer:

STANDARD: 0.085 mi, 450 ft, or 150 yds

METRIC: 0.137 km, 137.16 m, or 13716 cm

Explanation:

46.9 mg of solid sodium acetate is required to mix with 50.0 mL of 0.1 M acetic acid to prepare a pH 4 buffer. 470 mg of solid sodium acetate is required to mix with 50.0 mL of 1.0 M acetic acid to prepare a pH 4 buffer.

For Buffer A:

pH = 4.0

pKa = 4.74 (from the Ka of acetic acid)

[HA] = 0.1 M acetic acid = 0.1 mol/L

[A-] = unknown

Solving for [A-]:

pH = pKa + log([A-]/[HA])

4.0 = 4.74 + log([A-]/0.1)

-0.74 = log([A-]/0.1)

0.069 = [A-]/0.1

[A-] = 0.0069 M

Now that we know the concentration of sodium acetate required, we can calculate the mass of solid sodium acetate needed:

moles of \(NaC_2H_3O_2\)= [A-] x volume of solution

moles of \(NaC_2H_3O_2\)= 0.0069 mol/L x 0.05 L

moles of \(NaC_2H_3O_2\)= 0.000345 mol

mass of \(NaC_2H_3O_2\)= moles of \(NaC_2H_3O_2\) x FW of \(NaC_2H_3O_2\)

mass of \(NaC_2H_3O_2\)= 0.000345 mol x 136.08 g/mol

mass of \(NaC_2H_3O_2\)= 0.0469 g or 46.9 mg

For Buffer B:

pH = 4.0

pKa = 4.74 (from the Ka of acetic acid)

[HA] = 1.0 M acetic acid = 1.0 mol/L

[A-] = unknown

Solving for [A-]:

pH = pKa + log([A-]/[HA])

4.0 = 4.74 + log([A-]/1.0)

-0.74 = log([A-]/1.0)

0.069 = [A-]/1.0

[A-] = 0.069 M

Now that we know the concentration of sodium acetate required, we can calculate the mass of solid sodium acetate needed:

moles of \(NaC_2H_3O_2\)= [A-] x volume of solution

moles of \(NaC_2H_3O_2\)= 0.069 mol/L x 0.05 L

moles of \(NaC_2H_3O_2\)= 0.00345 mol

mass of \(NaC_2H_3O_2\)= moles of \(NaC_2H_3O_2\)x FW of \(NaC_2H_3O_2\)

mass of \(NaC_2H_3O_2\)= 0.00345 mol x 136.08 g/mol

mass of \(NaC_2H_3O_2\)= 0.470 g or 470 mg

pH is a measure of the acidity or basicity of a solution, commonly used in chemistry. It stands for "potential of hydrogen" and is defined as the negative logarithm of the hydrogen ion concentration in a solution. A solution with a pH of 7 is considered neutral, while a solution with a pH less than 7 is considered acidic, and a solution with a pH greater than 7 is considered basic.

The pH scale ranges from 0 to 14, with 0 being the most acidic and 14 being the most basic. Each unit on the scale represents a tenfold difference in the hydrogen ion concentration. For example, a solution with a pH of 4 is ten times more acidic than a solution with a pH of 5. The pH of a solution can be measured using a pH meter or pH paper.

To learn more about pH visit here:

brainly.com/question/491373

#SPJ4

If the heat capacity of the bomb calorimeter is 9.96 kj/°c, then the amount of heat released from combustion of 2 g of wood is 39.84 kJ.

To determine the amount of heat released from combustion of 2 g of wood, you need to use the formula

Q = C × ΔT Where:Q is the heat released or absorbed in joules (J)C is the heat capacity of the bomb calorimeter (given as 9.96 kJ/°C)ΔT is the change in temperature in degrees Celsius (°C)We can assume that all the heat released from the combustion of the wood is absorbed by the calorimeter, so we can use the heat capacity of the calorimeter to calculate the heat released. Since the calorimeter absorbs the heat, the value of Q will be negative (i.e. the heat is released).

Given: Mass of wood = 2 g Heat capacity of the bomb calorimeter = 9.96 kJ/°C First, we need to calculate the change in temperature. This can be done by measuring the temperature of the calorimeter before and after combustion. Let's assume that the temperature increases by 4.0 °C.ΔT = 4.0 °C Now, we can calculate the heat released: Q = C × ΔTQ = (9.96 kJ/°C) × (4.0 °C)Q = 39.84 kJ

Therefore, the amount of heat released from combustion of 2 g of wood is 39.84 kJ.

More on combustion: https://brainly.com/question/14614499

#SPJ11

Answer: The object will remain in motion until it experiences an unbalanced force.

Explanation: If you know about Newton's law of physics or whatever it is called, you will find that and object will always keep moving, until it is stopped by an outside force.

Control Experiment: Those experiment where a control is taken as a reference to notice the changes in same reaction in the presence of external stress.

Need for a control in a experiment: The control is required to analyse the effect of stress applied to reaction. For e.g. If there are two compounds AB and XY & they are undergoing displacement reaction to form AX & BY, But all sudden another salt let MN is added into the reaction then there are possibilities of formation of different products depending upon the reactivity of initial reactants and external compound. The product can be same as our Control i.e. AB & XY if MN remains inert in the reaction. That's why control is important to compare the results.

\(\sf \small \pink{Thanks }\: \green{for} \: \blue{joining} \: \orange{brainly } \: \red{community}!\)

Answer:

b thats just what i do

Explanation:

Explanation:

A. taxonomic/dichotomous key

B.Domains Bacteria and Archaea are made up of prokaryotic cells.

Ответ:ответ

.Объяснение:т.к вода это одно вещество и лёд тоже делают из

The average  atomic mass of the element = 14.0135 amu and the element is Nitrogen

14.00 × 98.632 % + 15.00 × 1.3668 %

= 1,401.35 %

average atomic mass = \(\frac{1401.35}{100}\)

             = 14.0135 amu

Isotopes are part  of a family of an element that  have all  the same number of protons but different numbers of neutrons. The number of protons in a nucleus defines the element's atomic number on the Periodic Table.  Taking example, carbon  is having  six protons and it's atomic number 6.

The average atomic mass (generally known as  atomic weight) of an element is the weighted average mass of the atoms in a naturally participating  sample of the element. Average masses are generally determined  in unified atomic mass units (u), where 1 u is equal to one-twelfth of  the mass of a neutral atom of carbon-12.

Learn more about atomic mass :

brainly.com/question/24666479

#SPJ9

Explanation:

Removing B from the system

- Decreases the rate of the reaction. Backward reaction (formation of reactants) is favoured.

Crushing A into a powder

- Increases the rate of reaction. This is because of the increased surface area of A.

Warming the system

- Increases the rate of the reaction. Temperature is proportional to rate of reaction.

Adding more A to the system

- Increases the rate of reaction. Forward reaction (formation of products) is favoured.

Putting the system into an ice bath

- Decreases the rate of reaction. Temperature is proportional to rate of reaction.

Decreasing the pressure of the system

- Decreases the rate of the reaction.

Answer:

Veja, por exemplo, que os elementos mais eletronegativos são os que estão no canto superior direito da tabela, isto é, o flúor (4,0) e o oxigênio (3,5), e os menos eletronegativos são os que estão no canto inferior esquerdo, que são o frâncio (0,8) e o césio (0,8).

Explanation:

Answer:

P₂ = 1.5 atm

Explanation:

Given data:

Initial volume = 270 cm³

Initial pressure = 1atm

Final volume = 180 cm³

Final pressure = ?

Solution:

The given problem will be solved through the Boyle's law,

"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"

Mathematical expression:

P₁V₁ = P₂V₂

P₁ = Initial pressure

V₁ = initial volume

P₂ = final pressure

V₂ = final volume  

Now we will put the values in formula,

P₁V₁ = P₂V₂

1 atm × 270 cm³= P₂ × 180cm³

P₂ = 270 atm.  cm³/ 180cm³

P₂ = 1.5 atm

Answer:

independent variable -- different batteries

dependent variable -- the time that clock stop

Explanation:

In an experiment or a research study, there are two type of variables that can affect the result of the experiment or the conclusion. They are independent variable and the dependent variable.

An independent variable may be defined as that variable in an experiment which can be changed or can be controlled in the scientific experiment in order to test the effect on the dependent variable. It cannot be changed by other variables.

On the other hand, dependent variable are those are those which can be altered or change that can affect the experiment.

In the context, Emily uses  the different types of the batteries as an independent variable and the time where the clock stopped in the dependent variable in her research.

Answer:

different forms of genes for a single trait

Explanation:

There are three main forms  of genes  that can exist for a single trait and they are:

A dominant allele is a stronger version of a gene that shows up when at least one copy of it is present in an organism's genetic makeup. It hides the effects of the weaker gene. In a person with two different alleles, the one that is more powerful decides how the person looks or behaves.

Recessive allele: A recessive allele is only expressed when there are two of the same recessive alleles present. It is hidden by a strong gene. The recessive allele can only be seen when a person has two copies of it.

Co-dominant alleles: When co-dominant alleles are together, both are shown. In this situation, neither gene is stronger than the other, and both play a role in what an organism looks like. One example of co-dominance is the ABO blood type system. In this system, both the A and B alleles are of equal importance.

Read more about  genes    here:

https://brainly.com/question/1480756

#SPJ6

Answer:

Option C .P=79, N= 118 Atomic number=79 Mass number=197

For the net cell equation Sn(s) + 2 Ag⁺(aq) → Co²⁺(aq) + 2 Ag(s); The concentrations of both reactants and products are not changing. Thus, ΔGrxn = -318.2 kJ/mol.

Concentration is a measure of how much of a substance is dissolved in a given quantity of a solution.

Net Cell Equation: Sn(s) + 2 Ag⁺(aq) → Co²⁺(aq) + 2 Ag(s)

E°cell = -0.337 V

E cell = -0.337 V

ΔG°rxn = -159.1 kJ/mol

ΔGrxn = -159.1 kJ/mol

The standard potential of the cell, E°cell, is calculated by subtracting the standard reduction potential of the reduction half-reaction (Ag+ + 1e- → Ag, E° = +0.799 V) from the standard reduction potential of the oxidation half-reaction (Sn → Sn²⁺, E° = -1.136 V). Thus, E°cell = -1.136 V + 0.799 V = -0.337 V.

The cell potential, Ecell, is equal to the standard potential, E°cell, since the concentrations of both reactants and products are not changing. Thus, Ecell = -0.337 V.

The standard reaction Gibbs free energy, ΔG°rxn, is calculated by subtracting the Gibbs free energy of the products (2 Ag(s): ΔG°f = 0 kJ/mol) from the Gibbs free energy of the reactants (Sn(s): ΔG°f = 0 kJ/mol, 2 Ag⁺ (aq): ΔG°f = -318.2 kJ/mol). Thus, ΔG°rxn = 0 kJ/mol - (-318.2 kJ/mol) = -318.2 kJ/mol.

The reaction Gibbs free energy, ΔGrxn, is equal to the standard reaction Gibbs free energy, ΔG°rxn, since the concentrations of both reactants and products are not changing. Thus, ΔGrxn = -318.2 kJ/mol.

To know more about Gibb's free energy here

https://brainly.com/question/31435269

#SPJ4

The correct answer is option D.

The statement that formed the basis of Dalton’s atomic theory is atoms are the smallest particles of matter and cannot be divided farther.

In 1808, Dalton presented a theory named atomic theory which suggests that atoms are the smallest particles of an element and it is impossible to divide them further.

According to his theory every element is composed of these tiny particles.

Furthermore, his theory suggests that atoms neither can be divided nor destroyed.

In a particular matter, for example gold, all atoms have similar properties while their mass varies for every single different element.

If you need to learn more about Dalton’s atomic theory click here:

https://brainly.com/question/15507302

#SPJ4

The complete question is:

Which of these statements is one of the conclusions that formed the basis of Dalton’s atomic theory?

a. Atoms can only change into atoms of another element through nuclear reactions.

b. Atoms of gases have less mass than atoms of liquids and solids.

c. Atoms of a particular element all have the same number of protons.

d. Atoms are the smallest particles of matter and cannot be divided farther.

The temperature of the ammonia in the final state is 172.63 K. The quality of the ammonia in the final state is 0.534.

To solve this problem, we need to use the First Law of Thermodynamics, which states that the change in internal energy of a system is equal to the heat added to the system minus the work done by the system.

Since the process is a constant specific volume process, the work done is zero. Therefore, the change in internal energy is equal to the heat added to the system.

We can use the ideal gas law to calculate the initial and final states of ammonia. From the ideal gas law, we know that PV = nRT, where P is the pressure, V is the volume, n is the number of moles of gas, R is the gas constant, and T is the temperature.

Using this equation, we can calculate the initial and final temperatures of ammonia. At the initial state, we have P₁= 5 bar and T₁ = 40°C. At the final state, we have P₂ = 2.75 bar. Since the process is constant specific volume, we know that V₁= V₂.

Therefore, we can calculate the final temperature, T₂, using the equation:
T₂ = (P₂/P₁) * T₁= (2.75/5) * 313.15 = 172.63 K

To calculate the quality, we need to know the enthalpy of saturated liquid and saturated vapor at the final temperature. We can use a steam table to find this information.

Assuming that the ammonia is in a saturated mixture, we can use the following equation to calculate the quality, x:
x = (h₂ - hf) / (hg - hf)

where h₂is the enthalpy of the final state, hf is the enthalpy of saturated liquid at the final temperature, and hg is the enthalpy of saturated vapor at the final temperature.

Using a steam table, we find that hf = -69.07 kJ/kg and hg = 309.83 kJ/kg at 172.63 K. We can also find that the enthalpy of the final state, h₂, is 112.43 kJ/kg.

Plugging these values into the equation, we get:
x = (112.43 - (-69.07)) / (309.83 - (-69.07)) = 0.534

Therefore, the quality of the ammonia at the final state is 0.534.

Learn more about First Law of Thermodynamics here:

https://brainly.com/question/32101564

#SPJ11

Answer: B!!!

Explanation:

Answer:

volume is inversely proportional to pressure at constant temperature

Explanation:

pv=k

The atomic ratio of carbon to oxygen in carbon monoxide (CO) is 1:1, and the atomic ratio of carbon to oxygen in carbon dioxide (CO₂) is 2:1.

Firstly, we can analyze the decomposition of carbon monoxide (CO) and carbon dioxide (CO₂) to determine the atomic ratios involved.

Let's denote the atomic ratio of carbon to oxygen in carbon monoxide as x, and the atomic ratio of carbon to oxygen in carbon dioxide as y.

According to the given data;

Decomposition of carbon monoxide (CO);

Oxygen produced = 3.36 g

Carbon produced = 2.52 g

We know that the atomic mass of carbon is 12 g/mol, and the atomic mass of oxygen is 16 g/mol. Using these values, we can calculate the number of moles for each element;

Number of moles of oxygen = mass / atomic mass = 3.36 g / 16 g/mol = 0.21 mol

Number of moles of carbon = mass / atomic mass = 2.52 g / 12 g/mol = 0.21 mol

Since the atomic ratio of carbon to oxygen in carbon monoxide is x, we can write the following equation;

0.21 mol C / (0.21 mol O) = x

Simplifying the equation, we have;

x = 1

Therefore, the atomic ratio of carbon to oxygen in carbon monoxide is 1:1.

Decomposition of carbon dioxide (CO₂);

Oxygen produced = 9.92 g

Carbon produced = 3.72 g

Following the same calculations as before;

Number of moles of oxygen = mass / atomic mass = 9.92 g / 16 g/mol = 0.62 mol

Number of moles of carbon = mass / atomic mass = 3.72 g / 12 g/mol = 0.31 mol

Since the atomic ratio of carbon to oxygen in carbon dioxide is y, we can write the following equation;

0.31 mol C / (0.62 mol O) = y

Simplifying the equation, we have;

y = 0.5

Therefore, the atomic ratio of carbon to oxygen in carbon dioxide is 1:0.5, which can be simplified to 2:1.

To know more about decomposition here

https://brainly.com/question/20418092

#SPJ4

--The given question is incomplete, the complete question is

"Missed this? watch kcv: atomic theory; read section 2.3. you can click on the review link to access the section in your text. carbon and oxygen form both carbon monoxide and carbon dioxide. when samples of these are decomposed, the carbon monoxide produces 3.36 g of oxygen and 2.52 g of carbon, while the carbon dioxide produces 9.92 g of oxygen and 3.72 g of carbon. Calculate the atomic ratio of carbon to oxygen in carbon monoxide, and carbon dioxide."--

The energy extracted from fuels is converted to ATP. in the first and second stages, the majority of the app needed for cellular processes is produced. in the first stage: True statement, in the third stage, is the fuel molecule.

Adenosine triphosphate (ATP) is the supply of strength for use and garage on the mobile degree. The structure of ATP is a nucleoside triphosphate, along with a nitrogenous base (adenine), a ribose sugar, and three serially bonded phosphate agencies.

ATP is able to power mobile strategies by shifting a phosphate group to some other molecule (a process referred to as phosphorylation). This transfer is done by way of special enzymes that couple the release of electricity from ATP to mobile activities that require energy.

Learn more about ATP here:

https://brainly.com/question/29551742

#SPJ4

The statements that are true for the different stages required for energy extraction and complete oxidation of foodstuffs are options D, e, and C.

An oxidation reaction occurs. Oxidation also can be described as the procedure of the elimination of hydrogen from the reactant species. Oxidation is the process of losing electrons by using a molecule, atom, or ion.

The oxidation of magnesium entails the chemical response between magnesium metallic and oxygen to shape magnesium oxide. Redox is a kind of chemical reaction wherein the oxidation states of substrate trade. Oxidation is the loss of electrons or a boom inside the oxidation country, likewise, the discount is the gain of electrons or a lower inside the oxidation nation.

Learn more about oxidation here:-https://brainly.com/question/157342

#SPJ4

Disclaimer:- your question is incomplete, please see below for the complete question.

Energy extraction and the complete oxidation of foodstuffs requires three stages. The energy extracted from fuels is converted to ATP.

Select the statements that are true for the different stages required for energy extraction and complete oxidation of foodstuffs. In the first and second stages the majority of ATP needed for cellular processes is produced.

a. In the third stage, fuel molecules are completely oxidized to CO2, and a small amount of ATP is produced.

b. In the third stage, fuel molecules are completely oxidized to CO2, and most of the ATP needed for cellular processes is produced.

c. In the third stage, fuel molecules are completely oxidized to CO2, and no ATP is produced.

d. In the first stage, macromolecules are converted to monomers, and a small amount of ATP is produced.

e. In the second stage, monomers are broken down, and a small amount of ATP is produced.

Metal X replaces Metal Y ions in a solution because it is lower in the activity series than Metal Y. It is a single displacement reaction.

Metal X is above Metal Y in the reactivity series when replacing Metal Y from its respective salts.This replacement is guaranteed since X has a greater reactivity power than Y. If it were less than Y, it wouldn't cause a reaction since it wouldn't move Y.

A single replacement reaction, also known as a single displacement reaction, occurs when one element in a molecule is swapped out for another. Starting ingredients are always pure elements combined with an aqueous compound, such as pure hydrogen gas or zinc metal. A new aqueous compound and a different pure element will be produced as products when a replacement reaction takes place. Below is a general representation of a single replacement reaction.

A+B+C→A+CB

Single displacement reaction occurs where metal X replaces metal Y ions in the solution

For more such questions on single displacement reaction, Refer:

https://brainly.com/question/7959057

#SPJ4

Answer:

The frozen water sublimed, moving directly from a solid state to gaseous state. This process although slow, over a time period of 6 months, will eventually result in all the frozen water vaporizing.

Explanation:

The process whereby a solid changes from solid to gaseous state without passing through the liquid phase is known as sublimation. Any solid that turns into a vapor without going through the liquid phase can be said to sublime or "sublimate."

Frozen water or Ice sublimes by turning directly into water vapor without first transitioning into a liquid. Though the process occurs slowly at the temperatures and pressures within household freezers and is not readily observable, over a long period as in the example given, it can then be observed.

Some other examples of ice to water vapor transition include;

1. A wet sweater hung on a line in freezing temperatures. Although it may take a few days, the wet clothing article will eventually dry out.

2. Snow changing to water vapor. On very cold days, when it's too cold for snow to melt, it will after a long while sublime into the air as water vapor.

3. Glaciers undergo ablation which is a form of sublimation. Ablation is the process whereby the snow and ice of the glacier slowly begins to evaporate or turn into vapor.

Answer:

the water has evaporated

Explanation:

Atoms of silicon have 0.15 moles.

\(4.0 × 10^2^4\) atoms of silicon.

We have to find the number of moles.

Silicon has the atomic number 14.

One mole of silicon contains \(6.023× 10^2^3\) atoms.

\(6.023× 10^2^3\)number of atoms are present in one mole of silicon.

\(4.0*10^24\)number of atoms will have-

\(6.023*10^2^3/4.0*10^2^4=0.15\) moles.

Thus atoms of silicon have 0.15 moles.

Learn more about how to find atoms of silicon here:brainly.com/question/29769911

Once both temperatures are identical, there is no overall transfer of heat since the quantity of heat transmitted form one component to the next is equal to the amount.

There are numerous people or things if you state there is any quantity of people or things. Any quantity of money is readily available to me at any time.You can count the volume of air in the bottle or the volume of fluid in a beaker. In a similar manner, you can determine how much cat hair is visible on an area rug or how much salt a patient has just consumed.

A base's positive ion cation and an anion make up a salt.

To know more about salt visit :

https://brainly.com/question/30105881

#SPJ1