does the haloform test proceed more rapidly as more of the protons are substituted with halogens?

Answer:

A. The temperature is always lower.

Explanation:

Just took the test on Edg. 2020

Give me branliest please

The volume of 8.8g of carbon dioxide at STP is 4.38 L.

1 mole of any gas will take up 22.4 L of space at standard temperature and pressure (STP). A balanced chemical equation and the Ideal Gas Law can be used to determine the amount or mass of gas consumed or created in a chemical process.

n = m/M

where m is the molar mass of carbon dioxide and M is its mass in terms of molecules.

Considering that the molar mass of carbon dioxide is 44.01 g/mol:

n = 8.8 g / 44.01 g/mol

n = 0.1998 mol

Next, we can plug in the values of n, R, P, and T into the ideal gas law and solve for V:

V = (nRT)/P

V = (0.1998 mol x 0.0821 L·atm/(mol·K) x 273.15 K) / 1 atm

V = 4.38 L

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This is important to ensure proper handling and storage of propane tanks, avoiding exposure to high temperatures or open flames.

As the temperature of the propane tank increases due to exposure to fire, the pressure inside the tank will also rise. This is because propane is stored as a compressed gas in the tank. According to the ideal gas law, the pressure of a gas is directly proportional to its temperature, assuming the volume and amount of gas remain constant.

As the temperature of the tank increases, the kinetic energy of the propane molecules inside the tank also increases. The increased kinetic energy leads to more frequent and energetic collisions between the molecules and the walls of the tank. These collisions exert a greater force on the walls, resulting in an increase in pressure.

If the tank reaches a critical temperature or pressure, it may rupture or explode, releasing the pressurized propane.

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Answer:

Both are only physical changes

The amount of energy released during the formation of 1 mole of H2O(g) is -483.64 kJ divided by 2, which equals -241.82 kJ.

The given equation represents the formation of water (H2O) gas from hydrogen gas (H2) and oxygen gas (O2). The delta.hrxn value of -483.64 kJ indicates the heat energy released during this process.

To find out how much energy is released during the formation of 1 mole of H2O(g), we can refer to the stoichiometry of the balanced equation. The equation shows that 2 moles of H2(g) are required to form 2 moles of H2O(g).

Since the equation states that -483.64 kJ of energy is released during the formation of 2 moles of H2O(g), we can infer that half of this energy will be released when 1 mole of H2O(g) is formed.

Therefore, the amount of energy released during the formation of 1 mole of H2O(g) is -483.64 kJ divided by 2, which equals -241.82 kJ.

So, approximately -241.82 kJ of energy is released during the formation of 1 mole of H2O(g).

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The entire amount of greenhouse gases (such as carbon dioxide and methane) produced by human actions is known as a carbon footprint. One of the highest rates in the world, the average carbon footprint of a person in the United States is 16 tonnes.

As we drive, heat our homes with oil or gas, consume fuel for transportation, or use electricity produced from coal, natural gas, or oil, we all emit greenhouse gases.

Described by the WHO as a weight of CO2, a carbon footprint is a measurement of the effect your actions have on the amount of carbon dioxide (CO2) created by the combustion of fossil fuels.

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Answer:

Single celled organism

Explanation:

They fall under two categories:

Eukaryotes and prokaryotes.

Eukaryotes: Evolved from prokaryotes, they are larger and more complex. Unlike prokaryotes, they have a nucleus. Can be single celled or multicellular.

Prokaryotes: Oldest cell type, small and simple. They do not have a nucleus. Open unit with no compartments.

Answer:

\(\huge\boxed{\sf P = 800.8\ Ns}\)

Explanation:

Speed = v = 10.4 m/s

Mass = m = 77 kg

Momentum = P = ?

P = mv

Put the given data in the above formula.

P = (77)(10.4)

\(\rule[225]{225}{2}\)

The anticancer agent that is especially prone to induce crystallization of uric acid in the kidney is 5-fluorouracil (5-FU).

5-FU is an antimetabolite chemotherapy drug that is commonly used to treat a variety of cancers, including breast, colorectal, and gastrointestinal cancers. However, one of its side effects is that it can lead to an increased production of uric acid, which can then crystallize in the kidney and cause kidney damage.

This is known as tumor lysis syndrome, which is a medical emergency that requires immediate treatment to prevent serious complications. Patients receiving 5-FU should be closely monitored for signs of kidney problems and treated promptly if necessary.

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The liquids can be ranked in order of highest viscosity to lowest viscosity as follows: C\(_{18}\)H\(_{38}\) > C\(_{12}\)H\(_{26}\) > C\(_{6}\)H\(_{14}\).

Viscosity is a measure of a liquid's resistance to flow. Generally, larger and more complex molecules have higher viscosities because they have stronger intermolecular forces and a greater number of molecular interactions. In this case, C\(_{18}\)H\(_{38}\) (octadecane) has the largest molecule and the highest number of carbon atoms, resulting in stronger intermolecular forces and higher viscosity. C\(_{12}\)H\(_{26}\) (dodecane) has a slightly smaller molecule and lower viscosity compared to C18H38. Finally, C\(_{6}\)H\(_{14}\) (hexane) has the smallest molecule and weakest intermolecular forces, resulting in the lowest viscosity.

Therefore, the liquids can be ranked in order of highest viscosity to lowest viscosity as C\(_{18}\)H\(_{38}\) > C\(_{12}\)H\(_{26}\) > C\(_{6}\)H\(_{14}\)

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The concentration of hydroxide ions in the solution at 25°C is approximately 2.51 × 10^(-5) M. Please note that the significant figures in the answer are limited to two, as requested.

To determine the concentration of hydroxide ions in a solution with a pOH of 4.56 at 25°C, we can use the relation:

pOH = -log[OH-]

First, we need to convert the pOH value to OH- concentration by taking the antilog:

[OH-] = 10^(-pOH)

Substituting the given pOH value:

[OH-] = 10^(-4.56)

Calculating this value:

[OH-] = 2.51 × 10^(-5) M

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Answer: c

Explanation:

Answer:

option . D

Increase in temperature

is an indicator of a chemical reaction

hope it helps

Answer:

answer is D

Explanation:

some signs of a chemical change are a change in colour and the formation of bubbles.

the five conditions of chemical change: colour change, formation of precipitate, formation of a gas ,odor change, temperature change.

I think it will use for you

Answer:

Explanation:

Given:

Amount in calories = 450 calories

Amount in joules = 3.5 × 100 joules

Find:

Computation:

We know that,

1 calories = 4.184 joules

So,

Amount in calories = 450 calories

= 450 × 4.184

= 1,882.8 joules

Amount in joules = 3.5 × 100 joules

=  [3.5 × 100] / 4.184

= 83.652 calories

The amount of water is the independent variable in this experiment.

Plants are predominantly photosynthetic eukaryotes of the kingdom Plantae. Historically, the plant kingdom encompassed all living things that were not animals, and included algae and fungi; however, all current definitions of Plantae exclude the fungi and some algae, as well as the prokaryotes (the archaea and bacteria). By one definition, plants form the clade Viridiplantae (Latin name for "green plants") which is sister of the Glaucophyta, and consists of the green algae and Embryophyta (land plants). The latter includes the flowering plants, conifers and other gymnosperms, ferns and their allies, hornworts, liverworts, and mosses.

Most plants are multicellular organisms. Green plants obtain most of their energy from sunlight via photosynthesis by primary chloroplasts that are derived from endosymbiosis with cyanobacteria. Their chloroplasts contain chlorophylls a and b, which gives them their green color. Some plants are parasitic or mycotrophic and have lost the ability to produce normal amounts of chlorophyll or to photosynthesize, but still have flowers, fruits, and seeds. Plants are characterized by sexual reproduction and alternation of generations, although asexual reproduction is also common.

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The attractive force (intermolecular force) between these two molecules has most likely been produced by dipole-dipole interactions.

The correct option is B.

Intermolecular forces are forces of attraction or repulsion that act between atoms and other kinds of nearby particles, such as atoms or ions, to mediate interactions between molecules.

Some intermolecular forces are:

Considering the given molecules in the diagram:

Each molecule is made up of two distinct components, and as a result, each molecule has a constant bond dipole.

The attractive forces are dipole-dipole attractions because the dipoles do not cancel. The dipole-dipole attractions are substantially stronger than the dipole-induced dipole and London dispersion forces.

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Metallic elements exist in a solid-state and they are opaque, have a shiny surface, good conductors of electricity and heat, malleable and ductile, and are dense. The structure of metals is formed by atoms that are held together by metallic bonds. These atoms have loosely bound valence electrons that can be shared between the neighboring atoms.

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R, or reaction rate, is the number of nuclear reactions that occur per unit time,R0, on the other hand, refers to the cross-section for nuclear reactions, which is a measure of the probability of a particular nuclear reaction occurring when a beam of particles interacts with a target nucleus.

R and R0 (or Ru, RM) are terms used in nuclear physics to describe the behavior of nuclear reactions.

R, or reaction rate, is the number of nuclear reactions that occur per unit time. It is typically measured in units of reactions per second or per minute and is dependent on factors such as the number of target nuclei and the probability of interaction between the incident particles and the target nuclei.

R0, on the other hand, refers to the cross-section for nuclear reactions, which is a measure of the probability of a particular nuclear reaction occurring when a beam of particles interacts with a target nucleus. It is expressed in units of area, usually in barns, and is dependent on factors such as the particle energy and the properties of the target nucleus.

While both R and R0 are measures of nuclear reaction behavior, they describe different quantities and are used in different contexts. R is used to describe the overall rate of nuclear reactions, while R0 is used to calculate the expected number of reactions that will occur in a target nucleus under specific conditions.

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The increasing order of entropy for the substances given is as follows.

1. Ice

2. Water

3. Vaopr

Entropy is used to measure how random the particles in a system are. If the particles are in complete disarray, they have a higher entropy value. On the other hand, if they are perfectly arranged with no possible movement, then the substance has less or minimal entropy.

Entropy is one of the fundamental concepts in Thermodynamics and is associated with energy distribution in an isolated system. To be more precise, it also gives us different ways in which the particles can be distributed within the isolation.

In natural systems, entropy tends to increase with the passage of time, as all particles automatically turn toward disorders.

In the given cases, Ice has the least entropy as its solid particles have no room to move around, and their movements are restricted to vibrations only. Whereas for Vapor, due to very low forces between particles, they have near complete freedom of movement. Liquids like water come in between with their intermediate mobility.

Thus, the increasing order of entropy turns out to be Ice, Water, and Vapor.

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Answer:

Sorry for the wrong answer plz

99% was the percent yield of the reaction. So, the correct option is A.

Percent yield is defined as the percentage ratio of the actual yield to the theoretical yield. It is a measure of the amount of moles of product formed in relation to the reactant obtained in a chemical reaction, expressed as a percentage.

For percent yield, we have to first find the number of moles.

1 Mg(S) + 2 HCl(Aq) → 1 MgCl2(Aq) + 1 H2(G)

Mole of Mg (s)= Mass of Mg/ Molar mass

=48/24= 2 moles

Moles of HCl= 73/36.5= 2moles

So, 1 mole of Mg reacts with 2 moles of HCl as per the equation which means HCl is the limiting reagent. Mg will act as excess reagent so only 1 mole of Mg will react while the unreacted Mg will be 24g i.e. 1 mole.

The product which is experimental= 120-24= 96g

Theoretical product formed= 1mole of \(MgCl_2\)+ 1 mole of HCl= 95+2= 97gm/mole

Percentage Yield = (experimental Yield / Theoretical Yield) × 100 %

= (96/97)*100 = 98.96% which is approx. 99%

Thus, 99% was the percent yield of the reaction. So, the correct option is A.

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Your question is incomplete, most probably the complete question is:

The Following Reaction Is Carried Out:

1 Mg(S) + 2 HCl(Aq) → 1 MgCl2(Aq) + 1 H2(G)

The Initial Masses Of The Uncombined Reactants appear below:

Mass of magnesium- 48g

mass of hydrochloric acid= 73g

The reactants are combined and the final mass of the system is determined. If the final mass of the system is 120g, what was the percent yield of the reaction?

The amount of sulfur trioxide (SO3) produced when 1096.00 grams of oxygen (O2) react with excess sulfur dioxide (SO2) is 1522.67 grams.

To determine the amount of sulfur trioxide produced, we need to consider the balanced chemical equation for the reaction:

2SO2 + O2 → 2SO3

From the equation, we can see that the molar ratio between oxygen (O2) and sulfur trioxide (SO3) is 1:2. This means that for every 1 mole of O2, 2 moles of SO3 are produced.

To calculate the number of moles of O2, we divide the given mass (1096.00 grams) by its molar mass (32.00 g/mol):

moles of O2 = 1096.00 g / 32.00 g/mol

= 34.25 mol

Since the molar ratio between O2 and SO3 is 1:2, the number of moles of SO3 produced is twice the number of moles of O2:

moles of SO3 = 2 * moles of O2

= 2 * 34.25 mol

= 68.50 mol

Finally, we can convert moles of SO3 to grams using the molar mass of SO3 (80.06 g/mol):

grams of SO3 = moles of SO3 * molar mass of SO3

= 68.50 mol * 80.06 g/mol

= 5486.23 g

≈ 1522.67 g (rounded to two decimal places)

When 1096.00 grams of O2 react with excess SO2, approximately 1522.67 grams of SO3 are produced.

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Answer:

high

Explanation:

The energy needed to ionize a neutral atom is known as ionization energy. An atom must have one or more electrons removed from its valence shell in order to get ionized and become a cation. Alternately, you must produce an anion by adding one or more electrons to the valence shell. The energy needed for ionization will be lower the fewer electrons are supplied or withdrawn. As a result, atoms having an incomplete valence shell have a tendency to ionize more quickly and with less energy. However, entire valence shell atoms will require a large amount of ionization energy. As a result, noble gases need significant energy to ionize since they contain a full valence shell, are extremely stable, and do not tend to ionize easily.

The molar enthalpy of the reaction for the combustion of C6H6 is 3146.87 kJ/mol.

To calculate the molar enthalpy of the reaction, we need to find the amount of heat produced per mole of C6H6.

First, find the moles of C6H6: n = m/M where,

n = 300g / 78.11g/mol

= 3.84 moles

Next, divide the heat produced (12050 kJ) by the number of moles:

ΔH = q/n where,

ΔH = 12050 kJ / 3.84 moles = 3146.87 kJ/mol

So, The molar enthalpy of the reaction for the combustion of C6H6 is 3146.87 kJ/mol.

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After 20 minutes, there would be 0.75 kilograms of salt in the tank.

1. Let's derive the differential equation that y(t) satisfies. The rate at which salt is added to the tank is given by the concentration of the solution (0.5 kg/L) multiplied by the rate at which the solution is added (6 L/min). The rate at which salt is drained from the tank is given by the concentration of salt in the tank (y(t) kg/L) multiplied by the rate at which the solution is drained (4 L/min). Therefore, the differential equation is:

dy/dt = (0.5 kg/L * 6 L/min) - (y(t) kg/L * 4 L/min)

Simplifying further, we have:

dy/dt = 3 - 4y(t)

2. To find the amount of salt in the tank after 20 minutes, we can solve the differential equation. One approach is to find the particular solution by assuming y(t) takes the form of a constant, y. Substituting this into the differential equation, we have:

dy/dt = 3 - 4y

Setting dy/dt to zero (since y is constant), we can solve for y:

0 = 3 - 4y

4y = 3

y = 3/4

y = 0.75 kg

Therefore, after 20 minutes, there would be 0.75 kilograms of salt in the tank.

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The pressure when the helium balloon is airborne at a volume of 120 m³ and a temperature of -60°C is approximately 0.726 atm.

To solve this problem, we can use the ideal gas law, which states that:

PV = nRT

P is the pressure

V is the volume

n is the number of moles of gas

R is the ideal gas constant (8.314 J/(mol·K))

T is the temperature in Kelvin

First, let's convert the initial and final temperatures from Celsius to Kelvin:

Initial temperature (T1) = 20°C + 273.15 = 293.15 K

Final temperature (T2) = -60°C + 273.15 = 213.15 K

Next, we can set up two equations using the ideal gas law for the initial and final states:

P1 * V1 = n * R * T1

P2 * V2 = n * R * T2

Since the number of moles (n) and the gas constant (R) are constant, we can write:

P1 * V1 / T1 = P2 * V2 / T2

Now we can plug in the given values:

P1 * 3.0 m³ / 293.15 K = P2 * 120 m³ / 213.15 K

Simplifying the equation:

P1 / 293.15 = P2 / 213.15

Now we can solve for P2:

P2 = P1 * 213.15 / 293.15

Finally, we can substitute the initial pressure (P1) with the given value of 1 atm:

P2 = (1 atm) * 213.15 / 293.15

P2 ≈ 0.726 atm

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Ionic solids use regular, repeating patterns to create crystal-like structures. Therefore, lattice structure of FeS  is of cubic.

Ionic solids would those be crystalline solids that include ions with opposite charges that are kept together by intense electrostatic forces of attraction. (ionic bonds). Examples: Ionic solids like NaCl, KBr, etc. have crystals. Describe how the anions and cations are arranged using a clear geometric design.

Describe how the anions and cations are arranged using a clear geometric design. They thus exist at room temperature as crystalline solids. They never exist as liquids or gases under normal pressure and temperature circumstances. Lattice structure of FeS is of cubic.

Therefore, lattice structure of FeS  is of cubic.

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Answer:

The perimeter of a Rectangle P= 2(l + b)

Area of a Rectangle A = l × b

The behavior of a strong acid is that it  it dissociates completely in aqueous solution, while weak acids partially dissociate in aqueous solution.

WHAT AN ACID IS:

Acids are chemicals that, when dissolved in water, split into protons (H+). Acids have a sour taste and have the capacity to color blue litmus paper red.

An acid can be classified as either weak or powerful, though. When in an aqueous solution, a strong acid entirely dissociates into hydrogen ions.

Strong acid is an acid that totally separates into ions in water.

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