For the balanced reaction: 3 H2 N2 ----> 2 NH3, how many moles of ammonia (NH3) will be produced from 4.0 moles of nitrogen (N2)

Answer:

Q1) solids are strong, gasses are weak

Explanation:

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Answer:

Solids are strong, gases are weak

Explanation:

The attraction between molecules of a solid and gas are different in that those of solids are strong and gases are very weak.

The intermolecular attraction in gases are the weakest of the three states of matter. For the solid, they present the strongest attraction.

To determine the number of grams of SiH4 (silane) that contain 8.23 × 10^22 atoms of hydrogen, we need to calculate the molar mass of SiH4 and use it to convert the given number of atoms into grams.

The molecular formula of silane is SiH4, which consists of one silicon atom (Si) and four hydrogen atoms (H). To find the molar mass of SiH4, we add the atomic masses of each constituent element: the atomic mass of Si is 28.0855 g/mol, and the atomic mass of H is 1.00784 g/mol.

Molar mass of SiH4:

(1 × atomic mass of Si) + (4 × atomic mass of H)

= (1 × 28.0855 g/mol) + (4 × 1.00784 g/mol)

= 28.0855 g/mol + 4.03136 g/mol

= 32.11686 g/mol

The molar mass of SiH4 is approximately 32.11686 g/mol.

Now, we can calculate the number of moles of SiH4 using the given number of hydrogen atoms. Since there are four hydrogen atoms in one molecule of SiH4, we divide the given number of hydrogen atoms by 4 to find the number of moles.

Number of moles of SiH4:

8.23 × 10^22 atoms of H / 4

= 2.0575 × 10^22 moles of SiH4

Finally, we can convert the number of moles of SiH4 into grams using the molar mass of SiH4.

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To find the mass of SiH4 containing a certain number of hydrogen atoms, we need to use the mole concept and molar mass. 0.136 mol of H atoms is equal to 0.544 mol of SiH4, which weighs 17.5 grams.

To determine the number of grams of SiH4 that contain 8.23 x 1022 atoms of hydrogen, you need to use the mole concept and the molar mass of SiH4.

1. Calculate the number of moles of hydrogen atoms in 8.23 x 1022 atoms:
8.23 x 1022 atoms H x (1 mol H / 6.022 x 1023 atoms H) = 0.136 mol H

2. Use the mole ratio between SiH4 and H to find the number of moles of SiH4:
1 mol H / 4 mol H = 0.136 mol H / x mol SiH4
x = 0.544 mol SiH4

3. Calculate the mass of SiH4 using its molar mass:
0.544 mol SiH4 x 32.1 g/mol = 17.5 g

Therefore, 17.5 grams of SiH4 contain 8.23 x 1022 atoms of hydrogen.

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The ABS plastic is a polymer which has styrene 28.5% by mass.

A polymer is a substance or material made up of macromolecules, which are very big molecules made up of several repeating subunits.

Styrene and acrylonitrile are polymerized with polybutadiene to create ABS, a terpolymer. Since ABS plastic is amorphous, it lacks a proper melting point.

A polymer called a terpolymer is created when three distinct monomers are copolymerized.

Let the mass of sample ABS plastic = 100 g

Given, mass of Nitrogen (N) in ABS plastic = 11.9 g

Moles of Nitrogen (N) in ABS plastic = 11.9 / 14 = 0.85 mol

1 mole of N is present in 1 mole of acrylonitrile

0.85 mol of N is present in acrylonitrile = 0.85 mol

Moles of acrylonitrile = 0.85 mol

Mass of acrylonitrile = 0.85 mol X 53 g/mol = 45.05 g

Moles of \(Br_2\) reacted = 1.56 g / 159.8 g/mol = 0.0098 mol

As given, \(Br_2\) and butadiene react in 1:1 by moles

So, moles of butadiene = 0.0098 mol

Mass of butadiene in 2g ABS sample = 0.0098 mol X 54 g/mol = 0.529 g

Mass of butadiene in 100g ABS sample= 0.529 / 2 x 100 g = 26.45 g

Mass of styrene in 100g ABS Sample = mass of sample - mass of butadiene - mass of acrylonitrile

Mass of styrene = 100 – 26.45 – 45.05 = 28.5g

% Mass of styrene = 28.5%

Result:

28.5% of styrene is present in 100g ABS plastic, which is a polymer.

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The standard free-energy change at 25 ∘C for the given reaction, Mg(s)+Fe₂+(aq)→Mg₂+(aq)+Fe(s) can be calculated using the equation:ΔG∘ = ΣnΔGf∘ (products) − ΣnΔGf∘ (reactants)where ΔGf∘ is the standard free energy of formation of the compound, n is the stoichiometric coefficient of each compound in the reaction.

The values of ΔGf∘ for the given reaction are:

Mg₂+ (aq):−467.2 kJ/mol Fe(s): 0 kJ/mol Fe₂+(aq): −237.2 kJ/mol Mg(s): 0 kJ/molΔG∘ =

ΣnΔGf∘ (products) − ΣnΔGf∘ (reactants)ΔG∘ =

[ΔGf∘ (Mg₂+ (aq)) + ΔGf∘ (Fe(s))] - [ΔGf∘ (Mg(s)) + ΔGf∘ (Fe₂+(aq))]ΔG∘ =

[−467.2 kJ/mol + 0 kJ/mol] - [0 kJ/mol + (−237.2 kJ/mol)]ΔG∘ =

−230.0 kJ/mol At 25 ∘C, the standard free-energy change for the given reaction is −230.0 kJ/mol. The units of ΔG∘ are kilojoules per mole (kJ/mol). Hence, the answer is -230.0 kJ/mol.

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Answer: A solution with the maximum possible amount of solute is saturated.

Explanation:

Answer:

saturation is the term, saturation occurs when the extract mixture has reached a point at which it contains the maximum amount of solute.

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A. Calcium (Ca) has 2 valence electrons, B. Oxygen (O) has 6, C. Element 117 specific valence electrons are not well-established yet, D. Indium (In) has 3, E. Argon (Ar) has 8, F. Bismuth (Bi) has 5.

Valence electrons are the electrons located in the outermost shell of an atom. They play a crucial role in chemical reactions as they are involved in the formation of chemical bonds. The number and specific valence electrons for each element are determined by its atomic structure. The periodic table is a useful tool for identifying the number of valence electrons for each element, as elements in the same group share similar valence electron configurations. For example, elements in group 1 have one valence electron, elements in group 2 have two valence electrons, and so on. Understanding the valence electrons and their distribution can help chemists predict the behavior of elements and their compounds in chemical reactions.

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(complete question)

How many valence electrons do each of the following elements have, and what are the specific valence electrons for each element? A. Ca B. O C. element 117 D. In E. Ar F. Bi

The dissociation of a weak acid/base in solution is not complete.

A strong acid is an acid that dissociates completely in solution. A strong base is a base that dissociates completely in solution.

A weak acid do not dissociate completely in solution and a weak base do not dissociate completely in solution.

The equation of the dissociation of a strong acid/base goes to completion while that of a weak acid or base is reversible with the equilibrium position lying closer to the left hand side.

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The term used for the geometrical isomer shown below is the term "cis-isomer."

Cis-trans isomerism, also known as geometric isomerism or configurational isomerism, is a type of stereoisomerism that occurs in alkenes and cyclic compounds.

Cis-isomer and trans-isomer are two types of stereoisomers.

Cis-isomer refers to a molecule in which two functional groups or substituents are on the same side of the double bond or ring.

Cis-isomerism occurs when substituents on a double bond or ring have the same spatial orientation.

The molecule shown below is an example of a cis-isomer.

Cis-isomers and trans-isomers have the same molecular formula and sequence of bonded atoms but differ in their spatial arrangement.

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Answer:

Paleoclimatology

Step by Step explanation:

is the study of climate records from hundreds to millions of years ago. Information for paleoclimate studies come from natural records rather than instruments: these indirect records of climatic conditions are called proxy records. Coring a tree to gain access to tree ring data.

Answer:

proton-27

electron-25

neutron-35

Explanation:

119 so a I think that's Is me anser

The volume of space it takes up, whereas its mass is the amount of matter it contains. A sample's density is the quantity of mass per unit of volume.

\(HClO_4 +NaOH \longrightarrow NaClO_4 + H_2O\\\\\)

HClO₄ is a monoprotic strong acid.

1 mol of HClO₄ reacts with 1 mol of NaOH for neutralization.

Calculating the moles of NaOH \(= (0.0789\ M) \times (0.050\ L) = 0.003945\ mol\)

Calculating the needed moles in HClO₄ \(= 0.003945 \ mol\)

Calculating the HClO₄ Molarity that is 0.188 M

Calculating the HClO₄ volume that is needed \(= \frac{(0.003945\ mol) }{ (0.188\ M)} = 0.020\ L\)

Therefore, the volume of HClO₄ that is needed = 20 mL

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Total heat generated by 2 mole of TiO2(s) is 4.963kJ.

The amount of heat released in the reaction of 2.89 mol of TiO2(s) can be calculated using the following equation: q = nCΔT, where n is the number of moles, C is the specific heat capacity of TiO2, and ΔT is the change in temperature.

The specific heat capacity of TiO2 is 683. 697. J/kgK. and the change in temperature is is 25k. By plugging in the values and converting J to kJ,

q = 2.89 * 25 * 683.697

=> 4963.35

In brief, the amount of heat released by 2.89 mol of TiO2(s) is 4.963kJ.

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Complete question :

determine how much heat (in kj) of 2.89 mol of tio2(s) with a temperature difference of 25k

Answer:

Metal casting makes use of the way solids can melt into liquids and freeze back into solids.

Answer:2

Explanation:

Answer:

2

Explanation:

Answer:

the method is fractional distillation

1) a) The apparatus that can be used to separate a mixture of ethanol and water is called a fractional distillation apparatus. It consists of the following components:

b) The method of separation used in this apparatus is called fractional distillation.

2) In fractional distillation, the fractionating column provides additional surfaces for the vaporized components to condense and revalorize.

Distillation flask: This is a round-bottomed flask where the mixture of ethanol and water is initially placed.

Fractionating column: A long column with several glass beads or plates. It provides a large surface area for the vaporized components to condense and revalorize, aiding in the separation process.

Thermometer: It is placed at the top of the fractionating column to monitor the temperature during the distillation process.

Condenser: It is a coiled glass tube connected to the fractionating column. Cold water flows through the condenser, causing the vaporized components to condense back into liquid form.

Receiver flask: This is where the separated components are collected. The receiver flask is placed at the end of the condenser.

b) The method of separation used in this apparatus is called fractional distillation. Fractional distillation is employed when the components of a mixture have similar boiling points. In the case of ethanol and water, they form an azeotropic mixture with a boiling point of around 78.2°C. Simple distillation would not effectively separate these two components because they would boil together and vaporize simultaneously.

In fractional distillation, the fractionating column provides additional surfaces for the vaporized components to condense and revaporize. This repeated condensation and revalorization process allows for more efficient separation. The higher surface area in the fractionating column helps to achieve better separation of the ethanol and water, resulting in a more concentrated sample of ethanol in the distillate collected in the receiver flask.

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Answer:

2Mg+O=2MgO

Explanation:

32gram of reacting

There are 24 valance electrons in the compound.

We know that the valence electrons are those that are found on the valence shell of an atom. There are four atoms that can be seen in the compound that is under consideration. The atoms are selenium, bromine (2 atoms) and oxygen.

Given that there are seven valence electrons in bromine and six valence electrons in oxygen and selenium. We have;

2(7 electrons of bromine) + 6 electrons of oxygen + 4 electrons of Se

= 24 electrons

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The alkyl halide that  would undergo SN2 reaction most rapidly is option (C) CH3CH2-I.

SN2 reaction is a type of nucleophilic substitution reaction and alkyl halides are organic compounds containing halogen atoms that undergo nucleophilic substitution reactions.

So, the correct answer to the given question is (C) CH3CH2-I.

In terms of bond dissociation energy, I > Br > Cl > F.

Therefore, the correct answer is (C) CH3CH2-I.

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The Valence Bond (VB) Theory is a quantum theory of chemical bonding which states that a chemical bond is formed when two atoms share a pair of electrons. The theory has three postulates:

Valence is a term used in psychology to describe the degree to which a person experiences an emotion, such as happiness or sadness. It is associated with the amount of pleasure or displeasure that one feels toward an event, object, or situation. Valence is measured on a scale from positive to negative, with positive emotions having a higher valence than negative emotions.

1. Hybridization: Hybridization is the process of combining atomic orbitals to form new hybridized orbitals with lower energy and new shapes. These hybrid orbitals are more stable and better suited for bonding than the original atomic orbitals.

2. Bond Formation: Bond formation occurs when two hybridized orbitals overlap and share a pair of electrons. This overlap creates a strong electrostatic attraction between the two atoms, which is the chemical bond.

3. Resonance: Resonance is the idea that the chemical bond between two atoms can be thought of as a combination of several different structures. These different structures can be represented by different resonance structures. Each resonance structure has a different energy and each can contribute to the overall strength of the bond.

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It is not the concentration of Caco₃ reactant present that determines the rate of the calcination reaction.

                       Cacao₃ (s) ←→ CaO(s) + CO 2 (g)

Calcium Carbonate:

Calcium carbonate is a compound with the chemical formula CaCO3. It is a common substance found in rocks such as calcite and aragonite (primarily limestone, a type of sedimentary rock composed primarily of calcite) and is a major component of eggshells, snail shells, seashells and pearls. A substance containing a lot of calcium carbonate or a substance similar to calcium carbonate is called calcareous. Calcium carbonate is the active ingredient in agricultural lime and is formed when calcium ions in hard water react with carbonate ions to form scale deposits.

Now,

Since the CO₂ produced in this reaction must escape from the interior of the Caco₃ particles, the decrease at any temperature of the reaction speed is determined. This is determined by the size of the solid calcium carbonate particles and the partial pressure of CO₂ surrounding the particles.

Grinding Cacao₃ into a fine powder greatly reduces the average distance that a CO₂ molecule must travel to escape each particle, thus accelerating the reaction rate.

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The fugacity in atm for pure ethane at 310 K and 20.4 atm is given by the equation: f = 20.4 exp (-Δg1/RT). The change in chemical potential between this state and a second state of ethane where the temperature is constant but the pressure is 24 atm is -0.0911RT.

Fugacity is a measure of the escaping tendency of a component in a mixture, which is defined as the pressure that the component would have if it obeyed ideal gas laws. It is used as a correction factor in the calculation of equilibrium constants and thermodynamic properties such as chemical potential. Here we need to determine the fugacity in atm for pure ethane at 310 K and 20.4 atm and the change in the chemical potential between this state and a second state of ethane where the temperature is constant but the pressure is 24 atm. So, using the formula of fugacity: f = P.exp(Δu/RT) Where P is the pressure of the system, R is the gas constant, T is the temperature of the system, Δu is the change in chemical potential of the system.  Δu = RT ln (f / P)The chemical potential at the initial state can be calculated using the ideal gas equation as: PV = nRT    

=>  P

= nRT/V

=> 20.4 atm

= nRT/V

=> n/V

= 20.4/RT The chemical potential of the system at the initial state is:

Δu1 = RT ln (f/P)

= RT ln (f/20.4) Also, we know that for a pure substance,

Δu = Δg. So,

Δg1 = Δu1 The change in pressure is 24 atm – 20.4 atm

= 3.6 atm At the second state, the pressure is 24 atm.

Using the ideal gas equation, n/V = 24/RT The chemical potential of the system at the second state is: Δu2 = RT ln (f/24) = RT ln (f/24) The change in chemical potential is Δu2 – Δu1 The change in chemical potential is

Δu2 – Δu1 = RT ln (f/24) – RT ln (f/20.4)

= RT ln [(f/24)/(f/20.4)]

= RT ln (20.4/24)

= - 0.0911 RT Therefore, the fugacity in atm for pure ethane at 310 K and 20.4 atm is:

f = P.exp(Δu/RT)

=> f

= 20.4 exp (-Δu1/RT)

=> f

= 20.4 exp (-Δg1/RT) And, the change in the chemical potential between this state and a second state of ethane where the temperature is constant but pressure is 24 atm is -0.0911RT. Therefore, the fugacity in atm for pure ethane at 310 K and 20.4 atm is given by the equation: f = 20.4 exp (-Δg1/RT). The change in chemical potential between this state and a second state of ethane where the temperature is constant but the pressure is 24 atm is -0.0911RT.

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Answer:

C.

two in the reactants and two in the products

Explanation:

The law of conservation of mass helps us balance chemical equations so that there are the same number and type of atoms in the reactants and products.

There are two nitrate ions in Ba(NO3)2 and two in 2LiNO3.

Answer:

D

Explanation:

I just took the quiz on a pex

The electrode is the anode in a galvanic cell should be option d. The electrode with the highest oxidation potential.

The electrode should be lies in the left half-cell to represent the anode since oxidation should be arise here.

Here the flow of anions should be in the salt that bridges towards it. In the right half-cell that represent the cathode since the reduction arise here.

Hence, the option d is correct.

And the rest of the options are wrong.

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Active metals, such as calcium oxide (CaO), react with water to form an oxide-water reaction.

This reaction produces an alkaline solution, which has a pH higher than 7. As a result, the water will become less acidic, and the oxide will be converted into its hydrated form.

This reaction is an important part of the water treatment process, since it helps to reduce the acidity of water and make it safer for drinking.

Additionally, the alkaline solution produced by the reaction can be used to neutralize acidic materials, making it useful for a variety of industrial and environmental applications.

Active metals such as calcium oxide (CaO) are capable of reacting with water to form oxides.

The reaction between the oxides and water can be used in a variety of different applications, such as to create materials with high strength and durability, or to generate power through the combustion of the oxides.

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Answer:

0.694 cents per second

Explanation:

25x100=2500 cents per hour, 2500/60 = 41.67 per minute and 41.67/60=0.694 cents per second

Answer:

yeah

Explanation:

The molecular weight of caffeine is approximately 194.22 g/mol.

To calculate the molecular weight of caffeine (C8H10N4O2), you need to add the atomic weights of all the atoms present in the formula. The molecular weight can be found by using the periodic table and the atomic weights for each element:

C (Carbon): 12.01 g/mol
H (Hydrogen): 1.01 g/mol
N (Nitrogen): 14.01 g/mol
O (Oxygen): 16.00 g/mol

Now, multiply each atomic weight by the number of atoms present in the formula and add them together:

C: 12.01 g/mol × 8 = 96.08 g/mol
H: 1.01 g/mol × 10 = 10.10 g/mol
N: 14.01 g/mol × 4 = 56.04 g/mol
O: 16.00 g/mol × 2 = 32.00 g/mol

Add all these values to get the molecular weight of caffeine:

96.08 + 10.10 + 56.04 + 32.00 = 194.22 g/mol

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Answer:

Carbon (C)

Explanation:

Because the element is the element of the main subgroup of group IV , it has oxidation number +4 in the oxide, and oxide formula is EO2.

reaction:

                                     EO2 + H2O ---> H2EO3

from reaction               1 mol    1 mol       1 mol

31 g acid - 22 g oxide = 9 g water

M(H2O) = 18 g/mol

9g * 1 mol/18 g = 0.5 mol H2O

As we see from reaction molar ratios EO2 : H2O : H2EO3 = 1 : 1 : 1,

so if  we have 0.5 mol H2O , we also have 0.5 mol EO2.

0.5 mol EO2 has mass 22 g.

Molar mass(EO2) = mass/ number of moles = 22 g/ 0.5 mol = 44 g/mol

Molar mass (EO2) = M(E) + 2M(O) = 44 g/mol

M(E) + 2 *16 g/mol = 44 g/mo

M(E) = 44-32 = 12 g/mol

Molar mass 12 g/ mol is molar mass of carbon.

So, element is carbon (C).