If 1.70g of aniline reacts with 2.10g of bromine, what is the theoretical yield of 4-bromoaniline (in grams)

Answer: ahem...

Explanation: 1. True 2. reproducing 3. All of them 4. i would say true, the only thing is plants dont really digest food and it says "all" organisms... 5. B, C, and D...A is more of defense and not really "maintaining structure"

2.87 g of silver chloride can be made by reacting 200.0 mL of calcium chloride with 170.0 mL of silver nitrate, both of which have a 0.23 M silver nitrate concentration. Chemically, silver chloride is a substance.

AgCl is the chemical formula for this. It is generally known that this white crystalline substance is only weakly soluble in water. Silver chloride changes from grey to black or purplish in hue upon illumination or heating, indicating the presence of silver. As the mineral chlorargyrite, AgCl can be found in nature. Chemical processes take place everywhere around us, from the food our bodies metabolize to how the sunlight we receive is produced.

silver chloride mass: m (AgCl)=0.02*143,32g/mole=2.87 g, where n (AgCl) = (0.02*2)/2=0.02 moles.

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The net charge on the Peptide sequence: DSVK at pH = 0 is : a. net charge = +2.

The process of identifying the amino acids that make up a peptide chain's structural sequence is known as peptide sequencing. This knowledge must be made public in order to understand the structure and function of a protein within a cell, which is useful for biomedical research applications.

By convention, the names of peptides are always written from left to right, beginning with the N-terminal end. For example, the name glycyl-histidine-phenylalanine refers to a peptide that comprises glycine at the N-terminus, followed by a histidine, and then phenylalanine at the C-terminus.

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The percent composition of vanadium in the ore is 1A: 10.8%, and the percent composition of lead is 2B: 73.2%.

Vanadinite (Pb₅ (VO₄)₃Cl) = 1250 grams

Pure vanadium= 135 grams

Pure lead = 915 grams

Percent composition of vanadium =?

Percent composition of lead  =?

The formula to find the percent composition is as follows:

Percent composition =(substance mass in grams/ sample mass in grams) × 100

1: Now solving to find the percent composition of vanadium by putting values in the formula:

Percent composition of vanadium =  (vanadium mass/sample mass) × 100

Percent composition of vanadium =  (135 g/ 1250 g) × 100

Percent composition of vanadium =  10.8 %

2: Now finding the  percent composition of lead by using the same formula:

Percent composition of lead     = (lead mass/sample mass) × 100

Percent composition of lead    = (915 g / 1,250 g) × 100

Percent composition of lead    =  73.2%

"

Complete question:

What are the percent compositions of vanadium and lead?

A metallurgist begins with 1,250 grams of vanadinite (pb5(vo4)3cl) and ends up with 135 grams of pure vanadium and 915 grams of pure lead.

The percent composition of vanadium in the ore is ______ , and the percent composition of lead is ________ .

OPTIONS:

1.

A. 10.8%

B. 14.3%

C. 14.8%

D. 62.4%

2.

A. 55.6%

B. 73.2%

C. 16.0%

D. 23.8%

"

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Answer:

10.8%

73.2%

Explanation:

I just did the test and its right on  plato, Have a great a day!

Prevent the spread of dusts and vapors.Neutralize acids and bases, if feasible. Manage the spread of the liquid.absorb the liquid.Gather and incorporate the cleanup residues. Get rid of the wastes. Decontaminate the area and affected system.

Chemical spills are the uncontrolled launch of a dangerous chemical, both as a strong, liquid or a gas. these spills need to be minimized as tons as possible.

Chemical spills usually result from the dangerous handling of chemical compounds, incorrect chemical storage, chemical garage tank ruptures, incorrect containers for chemical disposal, and failure to eliminate chemical substances in a well timed way.

There are sorts of spills that you can run into: simple Chemical Spills and complex Chemical Spills. easy Chemical Spills are small, confined, and present minimal dangers.

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Answer:

0,5 moles

Explanation:

N = L × n

n = N ÷ L

n = 2,87 × 10²³ ÷ 6,02 × 10²³

n = 2,87 ÷ 6,02

n = 0,47 moles or 0,5 moles

Here is the Conclusion 240. Heat energy affects a substance’s intermolecular forces as the substance changes between states.

Heat energy increases during the following state changes

Solid - (melting)

Liquid -gas (evaporation)

Solid- gas (sublimation)

Heat energy decreases during the following state changes

Gas- liquid (condensation)

Liquid → solid (freezing)

Gas –solid (deposition)

An intermolecular force (IMF) (or secondary force) is the force that mediates the interaction of molecules, including electromagnetic forces of attraction or repulsion that act between atoms and other types of nearby particles, such as atoms or ions.

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The  heat energy required, in joules, to melt 5.00 x 10² grams of ice at 0.0°C. 2016.6 J.

When the temperature rises, molecules and atoms move faster and collide, creating heat generated (also known as heat energy). Thermal energy is the heat that results from heated substance's temperatures.

The following phrase may be used to determine the change in heat energy in a process like melting.

S = H * m / T

where:

S = entropy [kJ]

H = fusion heat = 3.36*10¹ [J/kg]

m = mass = 0.02 [kg]

T = temperature in kelvin = 273 [K]

S = 0.02 * 5.00 * 10² / (273 + 0)

S = 2016.6 J

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The complete question is -

Calculate the heat energy of 5.00 * 10² g of ice when it melts at 0.0°C. The heat of fusion of ice is 3.36 x 10'J/kg.

The gas will have a volume of 25.0 mL at a pressures of 60 kPa or a temperature of 200 K.

The average kinetic potential of the particle in a system is measured by temperature. Temperature is measured using thermometers, which measure the temperature of a system by taking a reading of the system's average kinetic energy. Temperature is measured in degrees, with higher temperatures indicating a higher average kinetic energy. Temperature can be affected by a variety of factors, including the amount of energy added to or removed from a system, the number of particles present in the system, and the type of particles present in the system.

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Answer:

Student C.

Explanation:

At higher temperatures, the particles move faster and collide with each other more frequently, which causes the gas to occupy a larger volume. At lower temperatures, the particles move slower and collide less frequently, which causes the gas to occupy a smaller volume.

When the balloon is placed in the freezer, the temperature inside the balloon will also decrease, causing the gas particles to slow down and collide less frequently, which leads to a decrease in the volume of the gas, hence the balloon will shrink or contract. On the other hand, the room temperature balloon will experience no significant change in the temperature and the gas particles inside the balloon will remain at the same level of activity, causing the balloon to retain the same volume.

A chemist determined that moles of silver participated in a chemical reaction using measurements. The mass of silver involved in the chemical reaction is 1.08 grams.

Moles of silver participated = 0.01

Molar mass of silver = 108 gram/mole

Weight of silver participated= mole* molar mass

                                                = 0.01*108 gram

                                                = 1.08 gram

A chemist (from the Greek chm(a) alchemy; replacing chymist from Medieval Latin alchemist)  is a scientist who studies chemistry. Chemists investigate the structure and properties of matter. Chemists meticulously describe the properties of molecules and their constituent atoms in terms of quantities. Chemists carefully measure the proportions of substances, the rates of chemical reactions, and other chemical properties. Pharmacists are commonly referred to as chemists in Commonwealth English.

Chemists apply their knowledge to learn the composition and properties of new substances, as well as to reproduce and synthesize large quantities of useful naturally occurring substances and to create new artificial substances and processes.

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Answer:

The Bohr model of the atom was replaced by the quantum mechanical model because it was unable to explain the behavior of electrons in atoms. The quantum mechanical model was able to explain the behavior of electrons in atoms more accurately.

Explanation:

Answer: Hot water freezes faster.

Explanation: It is because of the Mpemba effect taking place, and even though it seems impossible, it could have less dissolved gas in it, or even take up less mass because of this.

The final volume can be determined using Charles's law. The volume of gas at 5 degree Celsius will be 8.3 ml.

According to Charles's law, at constant pressure, the volume of a gas is directly proportional to the temperature.

Hence, V/T = constant.

Let, V1 and T1 be the initial volume and temperature and V2, T2 be the final quantities.

then, V1/T1 = V2/T2.

V2 = V1 T2/ T1

Given, V1 = 50 ml

T1 = 30 °C

T2 = 5 °C

Then, V2 = 50 ml × 5 °C /30 °C = 8.3 ml

Therefore, the volume of the gas reduces to 8.3 ml.

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The orbitals within subshells are filled in the sequence of increasing energy. The filling can choose from the 5s, 4d, as well as 5p sub-shells. Consequently, there are 18 total components in period 5.

There are 18 atoms in the 5th grade of the periodic table, never 32. Reason l=0, 1, 2, and 3 and n=5. The energy of the accessible electron shells 4d, 5s, and 5p grows in the correct sequence: 5s4d5p. and since there are a total of 9 accessible orbitals, 18 electrons could fit.

The fourth period includes 18 elements owing to the 10 extra electrons which the 3d orbitals can hold since the 3d sublevel doesn't really fill before the 4s sublevel.

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The elements with the highest ionization energy are the noble gases, which are located in the upper right corner of the periodic table. These elements include helium, neon, argon, krypton, xenon, and radon. These elements have a full valence electron shell, meaning that they have the maximum number of electrons possible in their outermost energy level. This makes them very stable and resistant to chemical reactions, as they do not have any electrons that can be easily removed or added.

As a result, they have very high ionization energy, meaning that a large amount of energy is required to remove an electron and form an ion. Due to these properties, these elements are not readily reactive with other elements and tend to exist as diatomic molecules or as individual atoms. These elements are used in a variety of industrial, medical, and everyday applications such as in lighting, refrigeration, and as inert gases in medical equipment and in the manufacturing of semiconductors.

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If the feedback loop of the knee reflex was cut off at any points along its path, then there will be no response of knee reflex.

Its results in harm to any part of your reflex arc, which can be due to a basic knee-medicinal condition. Healthcare suppliers can disclose hyporeflexia by spouting your knee with a rubber hammer.

If your doctor taps on a band and there isn't a reflexive movement in the muscle, it's a sign of knee-health matter. Usually, absent reflexes are created by an issue with the nerves in the tendon and muscle. You may have other muscle symptoms along with areflexia, like weakness, or atrophy.

So we can conclude that A decline reflex reply can be related to peripheral knee-nervous system disorders.

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The simplest formula for a compound is made up of 1.677 grams of iron and 0.640 grams of oxygen would be FeO.

What the question is asking here is the empirical formula of an oxide of iron made up of 1.677 grams of iron and 0.640 grams of oxygen. The empirical formula shows the formula in the simplest whole-number ratio of the atoms.

Iron (Fe) = 1.677 grams

Oxygen (O) = 0.640 grams

Converting the masses to moles:

Fe = 1.677/56 = 0.0299 mol

O = 0.640/16 = 0.0400 mol

Now, let's divide by the smallest mole:

Fe = 0.0299/0.0299 = 1.0

O = 0.0400/0.0299 = 1.3

Thus, the empirical formula of the oxide of iron is FeO.

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The average molecular velocity of the molecules will decrease as the reaction goes to completion at a constant temperature.

What is Molecular velocity?

Molecular velocity is the average speed of molecules in a sample of matter. It is determined by the temperature of the sample, with higher temperatures resulting in higher molecular velocities.

This is because the reaction produces a single product, meaning that the number of molecules in the reaction vessel is decreasing as the reaction goes to completion. As the number of molecules decreases, the average molecular velocity of the molecules decreases as well.

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This double displacement reaction and the coefficients of all the reactants and products in this balanced chemical reaction is Bacl₂ + Na₂CO₃ = BaCO₃ + 2Nacl.

A double displacement reaction is a particular type of reaction in which two reactants swap ions to produce two new molecules. Water-soluble ionic compounds interact with one another in a number of double displacement processes.

Coefficients are the numbers or expressions put in front of a chemical symbol or formula to balance chemical equations. It provides information on the number of atoms or molecules of the drug or chemical that are a part of the reaction.

When two or more compounds come into touch with one another and create a new substance, the process is known as a chemical reaction (s). Reactants or reagents are the name(s) for the substance(s) or substances that are initially incorporated into the chemical process. Chemical reactions typically involve a chemical change and produce one or more products, which typically differ from the reactants in some ways.

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According to the concept of Avogadro's number and STP conditions volume in liters of the sample is 15,388.7.

Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.

According to the definitions, Avogadro's number depend on determined value of mass of one atom of those elements.It bridges the gap between macroscopic and microscopic world by relating amount of substance with number of particles.

Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number

Number of moles is obtained as, number of atoms/Avogadro's number=4.088×10²⁴/6.023×10²³=6.78 moles on substitution in formula of PV=nRT=V=6.78×8.314×273/1=15,388.7 liters.

Thus, the volume is 15,388.7 liters of the sample.

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The balanced chemical equation that represents addition of CL2 to CH3CH=CH2 is : CH3CH=CH2 = CL2 > CH3CHClCH2Cl.

Balanced chemical equations have the same number and type of each atom on both the sides of an equation. Coefficients in a balanced equation has to be the simplest whole number ratio and mass is always conserved in chemical reactions.

Balanced equation is an equation for a chemical reaction where the number of atoms for each element in the reaction and total charge is same for both the reactants and products. In other words, we can say that mass and the charge are balanced on both sides of a reaction.

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At equivalence, the number of moles of methylamine and HCl are equal, and the pH of the solution is 4.76.

At equivalence, the number of moles of methylamine and HCl are equal, so we can use the equation:

n(CH3NH2) = n(HCl)

0.2108M * 110.0mL = 0.4152M * V

V = 52.4mL

Total volume of the solution: 110.0mL + 52.4mL = 162.4mL

We can use the Henderson-Hasselbalch equation to calculate the pH at equivalence:

pH = pKb + log([CH3NH2]/[HCl])

pH = 3.36 + log(0.2108M/(0.2108M + 0.4152M))

pH = 3.36 + log(0.2108M/(0.6259M))

pH = 3.36 + log(0.3389)

pH = 3.36 + (-0.4719)

pH = 4.76

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To determine the value of Kp for a reaction, we need to know the concentrations of all the reactants and products at equilibrium.

In this case, we are not given the equilibrium concentrations, so we cannot directly calculate Kp. Instead, we can use the ideal gas law to relate the equilibrium concentrations to the partial pressures of the gases, and use those partial pressures to calculate Kp.The equation for the ideal gas law is PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature. If we assume that the reaction occurs at a constant volume and a constant temperature, we can use the ideal gas law to relate the equilibrium partial pressures of the gases to the concentrations of the gases.Given that we have no information about the equilibrium concentrations or partial pressures, we can not calculate Kp.

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The periodic repetition of properties of elements is due to the regular arrangement of electrons in the atoms of those elements. This regular arrangement is known as the "periodic table" of elements. This is due to the behavior of electrons in atoms and the increasing number of valence electrons as atomic number increases, resulting in a regular pattern of electron configurations and properties.

Elements are arranged in the periodic table according to increasing atomic number. Elements in the same vertical row (group) have similar chemical and physical properties, and elements in the same horizontal row (period) have similar electronic configurations of their atoms.

The reason for this repeating periodic property is the behavior of the electrons in the atoms. As the atomic number increases, the number of protons in the nucleus increases, and the number of electrons in the atom increases. These electrons occupy different energy levels or shells around the atomic nucleus. The outermost shell electrons, the so-called valence electrons, are responsible for the chemical behavior of atoms and participate in chemical bonds. As the atomic number increases, the number of valence electrons in the atom increases. This results in a regular pattern of electron configurations and thus a regular pattern of properties.

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The situation that best describes the effect of a limiting reactant is that when there is not enough A reactant to react with whole B.

The limiting reactant, also known as the limiting reagent, is the reactant that is used first during a chemical reaction, hence restricting the amount of product that can be produced. The limiting reactant can be identified in a variety of methods ,but they all require employing mole ratios from the balanced chemical equation.

The theoretical yield is the maximum quantity of product possible given the limiting reactant. The quantity of product actually procured, or actual yield, is usually always less than the theoretical yield. The percentage yield used to describe the actual yield indicates what portion of the theoretical yield was attained.

In the equation there is only one situation which describes the effect of limiting reagent when there is not enough of A to react with whole B.

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Answer:275.4 g Al2O3

Explanation: The mass of Al2O3 formed is 2.7 mol * 102 g/mol = 275.4 g. This is because the molar mass of Al2O3 is 102 g/mol. This means that when 1 mol of Al2O3 is formed, it has a mass of 102 g. Therefore, when 2.7 mol of Al2O3 is formed, it has a mass of 2.7 mol * 102 g/mol = 275.4 g.

You may determine the number of moles of solution you need by multiplying the volume in liters (4.00L) by the solution's molar concentration (0.250M), and then by the mass of sodium hydroxide (39.99 g/mol) in molar form. 1L = 39.99g × 4.00L x 0.250 M x 39.99g

The number sodium hydroxide of moles of solute dissolved in one liter of a solution is known as its molarity.

where,

250 mM Molarity =

moles of solute = n

= liquid volume in milliliters = 4L = 4000 ml

Now, using the molarity formula to combine all the values provided, we obtain

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As a result, option c is correct: H must be negative and S must be positive.

Energy is transmitted to or from the surroundings when a chemical reaction occurs. An exothermic reaction occurs when energy is transmitted to the surroundings, and the temperature of the surroundings rises. The term exothermic implies "heating up." As an exothermic process progresses, energy, frequently in the form of heat, is released. An exothermic reaction is one that is chemical in nature and is characterized by the release of energy in the form of heat or light. Matching a light with a matchstick is an example of this sort of reaction in which the release is both heat and light.

Here,

The spontaneity can be determined by the equation as:

ΔG=ΔH−TΔS

If the Gibbs free energy is negative, it gives a spontaneous reaction. Hence, the ΔH must be negative and ΔS must be positive.

If the Gibbs free energy is positive then it will be non-spontaneous. Hence, ΔS must be negative at very high temperature.

Therefore, option c is correct that is the ΔH must be negative and ΔS must be positive.

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Making people aware of how terrible hunger and poverty are in contemporary society is the aim of A Modest Proposal.

These kinds of problems are still important in today's culture and are not only confined to Swift's day. Jonathan Swift wrote an article titled "A Modest Proposal" that discusses hunger and poverty. Swift created it in 1729 as a means of drawing attention to how terrible these issues were.Most likely, this idea did seem excessive to many of his contemporaries, especially if they failed to grasp the text's satirical and sarcastic tone. Swift is trying to make a point about how things between the rich English and the poor Irish have gotten out of hand.

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The carbon atom is in the center of the structure and is surrounded by four hydrogen atoms.

Structure is an organized arrangement of elements, such as components, materials, people, or ideas. It is a way of organizing and arranging the components of a system in order to achieve a desired outcome.

The most likely Lewis dot structure for methane (CH4) is the following:
The carbon atom is in the center of the structure and is surrounded by four hydrogen atoms. Each hydrogen atom has one electron in its outer shell, and the carbon atom has four electrons in its outer shell. All of the atoms are arranged in a tetrahedral shape, which matches the molecular geometry of methane.

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