How many moles are in 454 grams of dinitrogen trioxide (N2O3) ?

Answer: 67.5

Explanation:

Brainliest pls

The balancing of chemical equations is based on the law of conservation of mass.

How could a chemical process be made to balance out? Which integers can be changed, and which cannot?

When an equation is balanced, the coefficients can only be changed (the numbers in front of molecules or atoms).

The coefficients are indicated by the numerals in front of the molecule. Subscripts are the smaller numerals found following atoms. These cannot be changed while balancing chemical equations!

How is a chemical equation brought to equilibrium?

the algebraic balancing technique. Chemical equations can be balanced by assigning algebraic variables as stoichiometric coefficients to each species in the unbalanced chemical equation.

Equations in mathematics are used to calculate the values of each of these variables

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Answer:

the answer is a

Explanation:

A

because if u add

(a) The greater interconnectivity of a chains causes the tensile strength to rise with molecular weight.(b) As chain bonding develops, tensile strength rises with the degree of crystallinity.(c) Tensile strength rises when a material is deformed by drawing because the chains realign, increasing overall bonding forces.(d) The concomitant increase is crystallinity and consequently greater bonding causes the tensile strength of the an underformed material to increase with annealing.

(A) As the molecular weight of a semicrystalline polymer grows, so does its tensile strength.Increased chain entanglements with higher molecular weights account for this phenomenon.

Since chlorine has a stronger bond with fluorine than fluorine does with oxygen, we would anticipate polychlorotrifluoroethylene to have higher tensile strength.

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More reactive metals will drive less reactive metals from out metal salt complexes. As a result, a new salt as well as the weaker metal are created.

Any of a group of materials known as metals that exhibit strong thermal and electrical conductivity as well as mutability, ductility, and high light reflection. Copper is an example of metal.

Metals have various properties, including strength, hardness, and stiffness. From a small paperclip to a huge airplane, metals may be melted and shaped in to something. They effectively conduct heat and electricity.

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Based on the information provided, the element with successive ionization energies of 786.3 kJ/mol, 1,580 kJ/mol, 3,230 kJ/mol, 4,360 kJ/mol, 16,000 kJ/mol, and 20,000 kJ/mol is likely to be aluminum (c).

Ionization energy is the energy required to remove an electron from an atom or a positive ion. It is a measure of the atom's tendency to lose electrons and is generally higher for atoms with a smaller atomic radius and a higher positive charge on the nucleus.

The ionization energies of the elements in Period 3 (the third row of the periodic table) are generally as follows:

Sodium (a): 496.1 kJ/mol (1st), 4,562 kJ/mol (2nd)

Magnesium (b): 738.1 kJ/mol (1st), 1,450 kJ/mol (2nd), 7,646 kJ/mol (3rd)

Aluminum (c): 578.8 kJ/mol (1st), 1,180 kJ/mol (2nd), 2,980 kJ/mol (3rd), 4,180 kJ/mol (4th)

Silicon (d): 786.5 kJ/mol (1st), 1,551 kJ/mol (2nd), 3,217 kJ/mol (3rd), 4,336 kJ/mol (4th), 9,900 kJ/mol (5th)

Phosphorus (e): 1,045 kJ/mol (1st), 2,079 kJ/mol (2nd), 3,169 kJ/mol (3rd), 6,491 kJ/mol (4th)

Sulfur (f): 1,112 kJ/mol (1st), 2,077 kJ/mol (2nd), 3,281 kJ/mol (3rd), 4,535 kJ/mol (4th)

Chlorine (g): 1,257 kJ/mol (1st), 2,362 kJ/mol (2nd), 3,595 kJ/mol (3rd), 4,906 kJ/mol (4th)

Argon (h): 1,521 kJ/mol (1st)

As you can see, the ionization energies of aluminum (c) are the closest match to the values given in the question. Therefore, the element is likely to be aluminum.

The total number of electrons in p orbitals in a silver atom is 18.

The position of silver (Ag) in the fifth row of the periodic table, the 11th column of the periodic table, the 9th column of the transition metal, or the d block, determines the electron configuration for silver (Ag). The atomic number of silver is 47. Consequently, the final electron configuration for silver must be:

[tex]1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 4s^{2} 3d^{10} 4p^{6} 5s^{2} 4d^{9}[/tex]

Now, the total number of electrons in p orbitals are 18.

By changing the [tex]1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 4s^{2} 3d^{10} 4p^{6}[/tex] , either core notation or noble gas notation [Kr] can be used to write this notation. Then the configuration can be written as-

[tex][Kr] 5s^{2} 4d^{9}[/tex]

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Based on the cues Fe is nothing but ferric which is iron.An very crimson solution containing the ion [Fe (SCN) (H 2 O) 5] results when thiocyanate ions, SCN -, are added to a solution containing iron (III) ions, such as sodium, potassium, or ammonium thiocyanate solution. 2+

In the electrophilic aromatic substitution reaction known as "Friedel-Crafts alkylation," an alkyl substituent is attached to an aromatic ring (benzene). Lewis acids, such as AlCl3 and FeCl3, catalyze these reactions and aid in the production of carbocations from alkyl halides.

The solid phase of the Haber-Bosch Process is heterogeneous catalysis. Both hydrogen and nitrogen, the reactants, are gases. They are both poured into a vessel at a high temperature and extreme pressure in the presence of iron oxide.

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Answer:

ZnCO3 solid reacts to form Zn0 solid plus CO2 gas

Explanation:

the most likely answer here is cobalt

When one element in the compound has been swapped out for another, the single replacement reaction can be recognized. Option C is right as a result.

The replacement reaction is the process in which a compound is formed after a highly reactive element has replaced a low reactive element.

The reaction is listed as follows:

AX + Y X + AY

The highly reactive X causes Y to replace Y in the complex, creating the compound AX.

One element in a compound is replaced by another in a chemical reaction known as a single-displacement reaction, sometimes referred to as a single replacement reaction or exchange reaction.

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Given the fact that it consumes more water than the other system, the groundwater heater will warm the building more efficiently than the hot water system.

Water that is found underground in saturated regions under the surface of the earth is known as groundwater. The water table is the term for the saturated zone's top surface. Contrary to common perception, subterranean rivers are not created by groundwater.

Fresh water that soaks into in the soil from precipitation or melting snow and ice is called groundwater. It is kept in the microscopic crevices (pores) underlying rocks and dirt. Nearly 95% of the government's fresh water supplies come from groundwater.

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V = Adx, or alternatively Ady, where A denotes the usual disc's area and r = f(x) or f(y), depending on the axis of revolution. 2. The volume of the solid produced by a region under f(y) (to the left of f(y)) limited by the y-axis, the horizontal lines y=c and y=d, and rotating around the y-axis.

= πr2h 3.

V = dc[f(y)]2dy can be used to determine the volume of a solid that has been rotated about the y-axis.

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The mass of the iron that is present in the sample is 1.76 g.

We know that we can be able to use the stoichiometry of the reaction so as to be able to obtain the mass of the iron that is used in the reaction. Now we have the the fact that;

Number of moles of the dichromate = 25/1000 * 0.021

= 0.00525 moles

If 6 moles of iron reacts 1 mole of the dichromate

x moles of iron reacts with 0.00525 moles of the dichromate

x =  6 moles  * 0.00525 moles /1 mole

= 0.0315 moles

Mass of the iron =  0.0315 moles * 56 g/mol

= 1.76 g

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The effective reducer sodium borohydride. It is extremely efficient at converting aldehydes and ketones into alcohols, although not having the same potency as 1-phenyl-2-butanol.

Due to the distinct substitutions made to the two double-bonded carbons in 1-phenyl-2-butene, it can display geometric isomerism.

The group of chemical substances referred to as secondary alcohols includes 2-butanol, also known as 2-butyl alcohol or 2-hydroxybutane. The typical structure of secondary alcohols is HOC(R)(R') (R,R'=alkyl, aryl), and they are substances that contain a secondary alcohol functional group. A tasteless substance, 2-butanol has no smell.

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GAS A, Graham's law states that the rate of effusion of a gas is inversely proportional to the square root of its molar mass or that the rate of effusion of two gases = square root of the inverse of their molar masses.

PV = nRT, where P is pressure (in atm), V is the volume (in L), n is the number of moles of gas, R is the universal gas constant (0.08206 Latm/molK), and T is temperature, is the formula used to calculate the molar mass (in K).

By dividing the mass of one mole of ammonia by the aforementioned volume, the density can now be computed. This density is somewhat lower than the ammonia density at the STP, which is equivalent to (170.4g/mol)(22.4L/mol)=0.761g/L.

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The ratio of the atoms of the iridium and the platinum is; 8.86 : 1. Option B

We know that the atom is the smallest particle of the substances that can be able to take part in a chemical reaction. We know that in the platinum and the iridium, we both have atoms in the substances and now we would want to get the number of atoms that is in each of the elements.

Number of moles of iridium = 100g/192 g/mol = 0.52 moles

Number of moles of platinum = 900g/195 g/mol= 4.6 moles

Number of atoms in the iridium atom = 0.52 moles * 6.02 * 10^23 atoms

= 1.2 * 10^23 atoms

Number of atoms of platinum = 4.6 moles * 6.02 * 10^23 atoms

= 2.7  * 10^24 atoms

Since we have about 100g of the iridium and about 900 g of the platinum, then we have the that the ratio of the atoms of the elements is;

2.7  * 10^24 atoms:  1.2 * 10^23 atoms

= 8.86 : 1

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The number of mole of atoms of an element in the given compounds is written as subscripts as shown below:

1) 3 MgCl₂

2) 4 K₂CO₃:

3) NaC₂H₃O₂

Chemical formulas are formulas that are used to represent compounds using the symbol of the elements found in the compounds.

The moles of atoms of each element found in the compound are written as subscripts in front of the element.

The moles of the compound present are written as coefficients in front of the chemical formula of the compound.

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Explanation:

The value of [H+] can be calculated using the concentration of the HCl solution and the balanced chemical equation for the dissociation of HCl in water:

HCl (aq) + H2O (l) → H3O+ (aq) + Cl- (aq)

The concentration of HCl is 3.65 g / (36.5 g/mol) = 0.1 M

The concentration of H+ ions in the solution can be calculated using the concentration of HCl and the stoichiometry of the dissociation reaction:

[H+] = 0.1 M x (1 mol H+ / 1 mol HCl) = 0.1 M

To show that [OH-] is 1.00 x 10-12 M, we can use the relationship between [H+] and [OH-] in aqueous solutions, which is given by the ion product constant for water (Kw):

Kw = [H+] [OH-] = 1.00 x 10-14

Substituting the value of [H+] that we calculated above, we can solve for [OH-]:

[OH-] = Kw / [H+] = (1.00 x 10-14) / (0.1 M) = 1.00 x 10-12 M

Therefore, the concentration of OH- ions in the solution is 1.00 x 10-12 M.

O₂ and O₂⁻ are paramagnetic while O₂²⁻ is diamagnetic. An entity is paramagnetic if it has unpaired electrons in its molecules. The chemical is diamagnetic if every electron is coupled.

Unpaired electrons with magnetic dipole moments are paramagnetic as a result. According to QED, an electron's magnetic moment results from its spins and orbiting motion, granting it angular velocity in the microscopic sense.

Compounds that are magnetic are drawn towards the poles of magnets because they contain 1 or more lone pair of electrons. Due to the requirement of electronegativity in their orbitals, both the element iron as iron (III) are paramagnetic. The majority of the time, iron (II) also occupies the same position.

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The melting point of francium was thought to be around 8.0 °C (46.4 °F); Additionally, 27 °C (81 °F) is frequently encountered. Due to its radioactivity and extreme rarity, the element's melting point is unknown. 20  1.5 °C (68.0  2.7 °F) was the result of a different extrapolation based on Dmitri Mendeleev's method.

There are additional electron shells as you move down any group—for instance, Lithium has two shells and Francium has seven—that result in electron shielding. The force of attraction diminishes as it travels further through these shells to the outermost one, resulting in less powerful bonding.

The weaker each metallic bond becomes, the lower the melting and boiling points become. The iotas in a metal are kept intact by the fascination of the cores to electrons which are delocalized over the entire metal mass.

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Pure iron is not so strong to use in construction field. Addition of carbon make iron more strong and less brittle.

The useful form of iron made by incorporating carbon and traces of other metals is called cast iron. Pure form of iron is not strong enough to be useful and it is brittle.

Steel does become stronger and more durable when carbon is added to iron, but only to a certain extent. It will then grow stronger but less resilient (ie like cast iron).

Iron is made stronger by carbon by altering its crystal lattice. In terms of effect, this distortion is comparable to work hardening. Sadly, it is a very complicated impact that depends on how the steel is heat treated and precisely how much carbon is applied. Not all metals are subject to this.

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Answer:

In a covalent bond, two atoms are held together by the attraction between each atom and the shared electronsthe nuclei of the two atomsthe valence electrons of the two atoms. The number of covalent bonds that an atom can form depends on the number of energy levelsprotons and neutronsvalence electrons in the atom.

Explanation:

The solution is a. CH3COOH as the acid and base conjugation in the reaction between ammonia and acetic acid −.

In the given chemical equation, acetic acid acts because the acid even as ammonia acts because the base.

The given chemical equation is an acid-base response. Specifically, it's miles an acid-base response among acetic acid and ammonia. In an acid-base response, it's miles crucial to factor out which chemical species are the acid, base, conjugate acid, and conjugate base. In the problem, it most effective desires to pick out the acid reactant and the conjugate base product.

Basically, the acetic acid donates a Hydrogen ion to ammonia to supply the ammonium ion. With this mechanism, we will classify acetic acid as an acid. The conjugate base of the response is the product this is derived from the acid reactant. In this state of affairs wherein acetic acid is the acid reactant, the conjugate base can be the acetate ion. The conjugate base has nearly a comparable chemical method to the acid. It is simply one much less Hydrogen atom as compared to acid. Therefore, the acid reactant is the acetic acid even as the conjugate base reactant is the acetate.

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Answer:

NH3 + HCH3COO --> CH3COO- + NH4+

NH3: base

HCH3COO: acid

CH3COO: conjugate base

NH4+: conjugate acid

Explanation:

We know acetic acid is an acid so that makes ammonia base. An acid donates a proton/,hydrogen so acetic acid will lose a hydrogen and become the conjugate base. Bases gain a proton and become conjugate acids.

This allowed for exact replication. Genetic material has to be a stable molecule in order to be handed down from one generation to the next.

The study of how genes and characteristics are handed down from one generation to the next is known as genetics. Our health, looks, and even personality are all influenced by the information in our DNA! It all starts with genetics.

The study of genes is called genetics. From one generation to the next, our genes transmit information. The reason one child has blonde hair like their mother while their sibling has dark hair like their father, for instance, is genetic.

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A synthesis reaction is a type of chemical reaction in which two or more reactants combine to form a new compound or product.

In a synthesis reaction, atoms from the reactants are rearranged to form a new chemical structure, with the total number of atoms remaining the same.

Identifying the starting material or reactant, as well as the desired end product or target molecule.

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The substances produced during the light-dependent reactions to run the Calvin cycle reactions of photosynthesis are ATP and NADPH.

Thus, the correct answer is A.

The Cаlvin cycle is а cycle thаt tаkes plаce in the stromа of the chloroplаst. The primаry enzyme required for the cycle to occur is the RUBISCO or ribulose-1,5-bisphosphаte cаrboxylаse oxygenаse which is found in the stromа. It is the cycle where the ultimаte plаnt food glucose is synthesized.

The sources of energy in the Cаlvin cycle аre Аdenosine triphosphаte (АTP) аnd Nicotinаmide аdenine dinucleotide phosphаte hydrogen (NАDPH) which аre formed during the light reаction in the thylаkoid membrаne.

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The statements which correctly describe and provide evidence for the double replacement reaction are:

The correct options are A, D, and E.

Double replacement reactions are reactions where there is an exchange of radicals between two compounds when their solution is mixed together.

In double replacement reactions, a precipitate is always formed.

Also, the metallic ions trade places such that the cation of one compound is exchanged with the cation of the other compound.

A typical double replacement reaction is illustrated below:

AB + CD ---> AD + CB

where;

A and C are cations

B and D are anions.

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Complete question:

Which statements correctly describe and provide evidence for the double replacement reaction?

In the given reaction, hydrogen undergoes both oxidation and reduction. Hydrogen first oxidises from 0 to +1 oxidation state and then reduced  to -1 in LiH.

Oxidation is the process by which element combines with oxygen or loses electron forming its higher oxidation state. Whereas reduction is the process of combining with hydrogen or gaining electron to form the lower oxidation state of the element.

If an element undergoes both oxidation and reduction in the same reaction, it is called as disproportionation reaction. In the given reaction hydrogen undergoes disproportionation reaction.

In the molecular state H₂ is in 0 oxidation state and when it turns to LiNH₂, it oxidises to + 1 oxidation state and then reduces to -1 in LiH. Hence, option C is correct.

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Your question is incomplete. But your complete question probably was:

Because pure H2 is a hazardous substance, safer and more cost effective techniques to store it as a solid for shipping purposes have been developed. One such method is the reaction represented above, which occurs at 200 degrees Celsius. Which of the following happens to H atoms in the forward reaction?

Li₃N(s) + 2 H₂(g) ←→ LiNH₂(s) + 2 LiH(s)

(A) H atoms are oxidized only.

(B) H atoms are reduced only.

(C) H atoms are both oxidized and reduced.

(D) H atoms are neither oxidized nor reduced.