How to recover Aluminum from brass through melting

642.05 grams of As2O3 will be produced when 145 liters of oxygen are added to an excess of As2S3.

First we can start by using the given volume of the reactants at STP to calculate the number of moles of oxygen (O2) used in the reaction:

n(O2) = V(O2) / Vm(O2)

n(O2) = 145 L / 22.4 L/mol

n(O2) = 6.48 mol

From the balanced chemical equation, we can see that 2 moles of As2S3 react with 1 mole of O2 to produce 2 moles of As2O3. Therefore, the number of moles of As2S3 used in the reaction is:

n(As2S3) = 1/2 n(O2)

n(As2S3) = 1/2 * 6.48 mol

n(As2S3) = 3.24 mol

Since As2S3 is in excess, all of the O2 will be consumed in the reaction. Therefore, we can use the number of moles of As2S3 to calculate the number of moles of As2O3 produced:

n(As2O3) = 2/2 n(As2S3)

n(As2O3) = n(As2S3)

n(As2O3) = 3.24 mol

Finally, we can use the molar mass of As2O3 to calculate the mass produced:

mass(As2O3) = n(As2O3) × M(As2O3)

mass(As2O3) = 3.24 mol × 197.84 g/mol

mass(As2O3) = 642.05 g

Therefore, 642.05 grams of As2O3 will be produced when 145 liters of oxygen are added to an excess of As2S3.

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Answer:

\(V=0.0333L=33.3 mL\)

Explanation:

Hello there!

In this case, according to the given information, it is necessary for us remember that the molarity is calculated by dividing the moles by the volume of the solution in liters so the volume is calculated by dividing moles by the given molarity. However, we first need to calculate the mole given the mass and molar mass of the solute, H2SO4:

\(n=\frac{9.809g}{98.09g/mol}=0.1mol\)

Thus, the volume turns out:

\(V=\frac{0.1mol}{3.00mol/L}\\\\V=0.0333L=33.3 mL\)

Regards!

Considering the ideal gas law, the volume occupied by 3.25 moles of an ideal gas at a temperature of 18.00°C is 686.71 L.

An ideal gas is the behavior of those gases whose molecules do not interact with each other and move randomly. Under normal conditions and under standard conditions, most gases exhibit ideal gas behavior.

An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T), related by a simple formula called the ideal gas law:

P×V = n×R×T

Where:

In this case, you know:

Replacing in the ideal gas law:

1.13 atm×V = 3.25 mol× 0.8205 L.atm/K.mol× 291 K

Solving:

V = (3.25 mol× 0.8205 L.atm/K.mol× 291 K)÷ 1.13 atm

V= 686.71 L

Finally, the volume is 686.71 L.

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Answer:

B

Explanation:

Atoms of different elements have different atomic structures because they contain different numbers of protons and electrons. Here the given atomic models represent Beryllium, Be, and boron, B. The correct option is D.

An atomic model refers to the structure of an atom which comprises of a nucleus at the centre in which the protons and neutrons are present. The positively charged particles are called protons, negatively charged particles are called electrons whereas neutrons are neutral.

The number of protons or electrons in atom is known as the atomic number. The sum of number of protons and neutrons is called the mass number. Neutral atoms have equal numbers of protons and electrons.

Here 'Be' atom has 4 protons and hence its atomic number is 4, similarly 'B' atom has 5 protons and its atomic number is 5.

Thus the correct option is D.

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Answer:

(i) of protons

(ii) total number of both protons and neutrons

(b)they are neutral or have no overall charge because there are equal numbers of negative electrons to positive protons

Explanation:

Since both charges are equal, the number of positive protons cancels the number of negative electrons, thereby making the atom neutral

Answer:

1132 g

Explanation:

since you're trying to find the amount (grams?) you get from one element/compound from another, you need to do a stoichiometry equation.

First, you start with your 4.91 mol of KI - you don't need to go from gram to mole since you're already given your mol amount.

Then, you do a mole : mole ratio -

Once you do your mole : mole ratio, you end in moles. If the question is looking for moles, you're done. But, if you're looking for grams you need to do one more step -

Then you start doing your equation -

\(4.91 mol * \frac{1 mol PbI2}{2 mol KI} * \frac{461 g PbI2}{1 mol PbI2}\)

Your nervous system is most similar to a cruise ship (option C).

The nervous system is a complex network in the body in charge of:

This system works due to the action of structures such as:

Moreover, the nervous system works through the following steps:

Based on this, the system resembles a cruise ship because signals go from the senses to the brain and then back again similar to a cruise going away and then back to the port.

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Answer:

THIS IS THE CORRECT ANSWER

an air trip where you take multiple planes to get to your destination.

Explanation:

I did the other answer and I got it wrong so this is the correct answer

The purpose of the cotton wool plug on the conical flask is to permit the free passage of air over the edge of the flask and prevent the establishment of semi-anaerobic conditions in the culture. It can also be used to allow gases produced during a reaction to escape while preventing contaminants from entering the flask.

Answer:

All of the chemical energy of the gasoline ends up as heat

Explanation:

Gasoline has chemical energy stored in it. When used as a fuel to power a car, the gasoline is combusted to convert the chemical energy stored within into heat energy, and power the car. The heat energy is further converted to mechanical energy, light energy, sound energy, etc.

Water molecules pull the sodium and chloride ions apart, breaking the ionic bond that help them together.After the salt compounds are pulled apart ,the sodium and chloride atoms are surrounded by water molecules,as this diagram shows.Once this happens,the salt is desolved,resulting in a homogeneous solution

The incorrect steps to do a complete stoichiometric calculation is option C which is Write the dimensional analysis because it does not entails the reactions between the reactants and the products.

Stoichiometric calculations are calculations that are done in chemistry between the reactants and products which includes balancing of equations, conversation of moles in the reactants and products, evaluation of moles in the reactants and so on.

Therefore, The incorrect steps to do a complete stoichiometric calculation is option C which is Write the dimensional analysis because it does not entails the reactions between the reactants and the products.

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In a covalent bond, one pair of electrons, two and three can be shared. Forming single, double, or triple bonds. The more electron pairs are shared, the stronger the bond will be.

The reaction of cyclohexanone with dimethylamine, in the presence of catalytic amount of an acid forms a compound as shown in the reaction sequence.

If water is continually removed throughout the reaction, the chemical that results is typically referred to as an enamine. Salts like dimethylamine hydrochloride, an odourless white solid with a melting temperature of 171.5 °C, are created when dimethylamine reacts with acids.

Methanol and ammonia undergo a catalytic reaction at high pressure and temperatures to generate dimethylamine: (CH3)2NH + 2 H2O = 2 CH3OH + NH3. Dimethylamine is a base for a number of important industrial chemicals.  Dimethyl dithiocarbamate, a precursor to zinc bis(dimethyldithiocarbamate) and other compounds used in the sulphur vulcanization of rubber, is produced when it combines with carbon disulfide.

Dimethylamine is the source of the solvents dimethylformamide and dimethylacetamide. It is used as a raw ingredient to make a variety of medications and agrichemicals, including dimefox and diphenhydramine, respectively. 

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Answer:

B

Explanation:

to find the new rate when the concentration of reactants changes

Dipole-dipole interactions between molecules that do not include a covalent bond to a hydrogen atom are known as hydrogen bonds. The attraction between two incredibly electronegative atoms, such N, O, or F, and a hydrogen atom that is covalently bonded to one of them causes it to occur.

Any electronegative atom, such as oxygen, chlorine, or fluorine, may make up the other atom, whereas one of the atoms is hydrogen. Between molecules or between two different molecules, hydrogen bonds can develop between the atoms.

How to determine hydrogen bonding?

Determine whether hydrogen bonds are likely by looking at the molecule's Lewis structure. The electronegative atom needs one or more unshared electron pairs and a negative partial charge, much like oxygen and nitrogen do.

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Answer:

The answer is cytoplasm and the nucleus

Explanation:

Answer:

nucleus

Explanation:

Time increases as the volume of hydrochloric acid remains the same. This is because the concentration of hydrochloric acid would remain constant, affecting the reaction rate. Option B

Based on factors that affect the rates of chemical reactions, the expected trend in the table can be analyzed.

In this experiment, calcium carbonate reacts with hydrochloric acid to produce carbon dioxide gas. The reaction rate is influenced by factors such as concentration, surface area, temperature, and presence of a catalyst. Let's examine the options provided:

A. Time increases as the volume of hydrochloric acid decreases:

This option suggests that as the volume of hydrochloric acid decreases, the time taken for carbon dioxide to form increases. However, in general, a decrease in the volume of hydrochloric acid would result in an increase in its concentration.

B. Time increases as the volume of hydrochloric acid remains the same:

If the volume of hydrochloric acid remains the same, it means the concentration of hydrochloric acid is constant. In this case, the reaction rate is not expected to change significantly, and the time taken for carbon dioxide to form should remain relatively constant. Therefore, this option is plausible.

C. Time decreases as the mass of calcium carbonate decreases:

If the mass of calcium carbonate decreases, the surface area of the reactant particles decreases. A smaller surface area would result in less contact between reactant particles, leading to a slower reaction rate. Thus, the time taken for carbon dioxide to form would be expected to increase, making this option unlikely.

D. Time decreases as the mass of calcium carbonate remains the same:

If the mass of calcium carbonate remains the same, the surface area of the reactant particles also remains the same. Therefore, the reaction rate should remain relatively constant, and the time taken for carbon dioxide to form would not show a significant change. Thus, this option is also plausible.

Option B is correct.

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Answer:

The final temperature is 181.92°C

Explanation:

Given

Initial Temperature, T1 = 0°C

Initial Volume, V1 = 555mL

Initial Pressure, P1 = 80.0kPa

Final Volume, V2 = 1880ml

Final Pressure, P2 = 39kPa

Required

Determine the Final Temperature, T1

This question illustrates ideal gas law and will be solved using:

(P1 * V1)/T1 = (P2 * V2)/T2

But first, we need to convert temperature to degree Kelvin

T1 = 0°C = 273 + 0 = 273k

Next, we substitute values for P1, V1, T1, P2 and V2

THE EQUATION BEFOMES

(80 * 550)/273 = (1880 * 39)/T2

44000/273 = 73320/T2

Cross Multiply

44000 * T2 = 73320 * 273

44000T2 = 20016360

Solve for T2

T2 = 20016360/44000

T2 = 454.92K

Convert to degree Celsius

T2 = 454.92 - 273

T2 = 181.92°C

Hence, the final temperature is 181.92°C

The ideal gas law, also called the general gas equation, is the equation of the state of a hypothetical ideal gas.

The ideal gas law work under the constant:-

Hence the formula we gonna use is as follows:-

\(PV = nRT\)

In the question, the pressure, temperature, and volume are given in two different system

Hence it is equal to

\(\frac{PV}{T} = \frac{PV}{T}\)

Put the value given,

\(\frac{80*50}{273} = \frac{1880*39}{T}\)

Solving the equation, the value T will be:-

\(T2 = \frac{20016360}{44000}\)

=181.92C

The temperature given is 181.92C

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Answer:

i thinks its a. but iam not sure

Answer: D.

Explanation: I got it right and the dude above me is spreading fake news

Answer:

t? im pretty sure have a good day

The property of water that causes polar water molecules to surround ions, reducing the likelihood of them interacting with other ions, is known as its solvation or hydration ability.

This solvation property is a result of water's high polarity, which arises from its asymmetrical molecular structure and the presence of polar covalent bonds. Water molecules have a partially positive (+) and partially negative (-) end due to the electronegativity difference between oxygen and hydrogen atoms. This polarity enables water molecules to form hydrogen bonds with other water molecules and with polar solutes, such as ions. When ions dissolve in water, the partially positive hydrogen atoms of water molecules are attracted to the negatively charged ions, and the partially negative oxygen atoms of water molecules are attracted to the positively charged ions.

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Answer:

I believe it is the Ethiopian ibex

Explanation:

Answer:

I think it the Ethiopian ibex

Explanation:

im srry if it wrong.

hope this helps tho

VB or Valence Bond Theory:

The VB was developed in order to explain chemical bonding using the method of quantum mechanics. This theory primarily focuses on the formation of individual bonds from the atomic orbitals of the participating atoms during the formation of a molecule.

-------------

VB theory predicts covalent bond formation between atoms when they have half-filled valence atomic orbitals, each containing a single unpaired electron.

These atomic orbitals overlap, so electrons have the highest probability of being within the bond region. Both atoms then share the single unpaired electrons to form weakly coupled orbitals.

The two atomic orbitals do not need to be the same as each other.

The theory helps explain bond formation in cases where a Lewis structure can't describe real behavior.

Answer:

Interphase is the longest part of the cell cycle, this is when the cell grows and copies its DNA before moving into mitosis.

Explanation:

Answer:

Interphase

Explanation:

If 2.54 g of PbS is burned with 1.88 g of O2, approximately 2.20 grams of Pb will be produced.

The balanced equation for the reaction of lead sulfide (PbS) with oxygen (O2) to produce lead (Pb) and sulfur dioxide (SO2) is as follows:

2PbS + 3O2 -> 2Pb + 2SO2

From the balanced equation, we can see that the stoichiometric ratio between PbS and Pb is 2:2 or 1:1. This means that for every 1 mole of PbS, 1 mole of Pb is produced.

To calculate the number of moles of PbS, we need to divide the given mass (2.54 g) by its molar mass:

Molar mass of PbS = 207.2 g/mol (Pb) + 32.07 g/mol (S) = 239.27 g/mol

Moles of PbS = 2.54 g / 239.27 g/mol = 0.0106 mol

Since the stoichiometric ratio between PbS and Pb is 1:1, the number of moles of Pb produced is also 0.0106 mol.

To calculate the mass of Pb, we multiply the number of moles by its molar mass:

Molar mass of Pb = 207.2 g/mol

Mass of Pb = 0.0106 mol x 207.2 g/mol = 2.20 g

This calculation is based on the stoichiometric ratio between PbS and Pb, where 1 mole of PbS produces 1 mole of Pb. By converting the given mass of PbS to moles and then multiplying by the molar mass of Pb, we can determine the mass of Pb produced.

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Answer:

Na, K

Explanation:

From the given choices, the two elements that will react similarly are Na and K.

This is because, Na and K are in the same group on the periodic table.

Na and K are both called Alkali metals and they have just one electron in their outermost shell.

The number of electrons in the outermost of an atom determines their chemical properties.

Since Na and K are in the same group, they chemically combine with other atoms in similar fashion.

Answer:

qrtyuioplkjhgfdssssssazxcvbn

Answer:

The U.S. Air Force needed to understand the atmosphere for communications and to design heat-seeking missiles. At certain wavelengths carbon dioxide and water vapor block radiation. So the new missiles couldn't see very far if they used a wavelength that CO2 absorbs.

Explanation: