assuming the compound is dissolved in water, what is the formula for phosphorous acid? name symbol phosphate phosphite phosphorus p h3p h3po4 hp h3po3

Answer:

88.2

Explanation:

A spontaneous reaction is a reaction that occurs naturally under specific conditions. The characteristics of a spontaneous reaction include: 1. ΔG° < 0: The Gibbs free energy change (ΔG°) is negative, indicating that the reaction is thermodynamically favorable and will proceed spontaneously. 2. ΔE°cell > 0: The standard cell potential (ΔE°cell) is positive, which implies that the reaction can release electrical energy and proceed spontaneously in an electrochemical cell. 3. K > 1: The equilibrium constant (K) is greater than 1, meaning that the reaction favors the formation of products over reactants at equilibrium. Based on your provided answer choices, the correct answer is "all of the above" as it includes ΔG° < 0, ΔE°cell > 0, and K > 1, which are all characteristics of a spontaneous reaction.

Spontaneous reactions are chemical or biological reactions that occur without the influence of any external factors. This reaction has negative Gibbs free energy, meaning it releases energy into the environment. This reaction also tends to increase the entropy or uncertainty of the system. Examples of spontaneous reactions are the burning of hydrogen, the formation of carbon dioxide and water from carbonic acid, and the conversion of graphite to diamond.

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There are three ways heat is transferred into and through the atmosphere: radiation. conduction. convection.

Heat-transferred agriculturalists, foresters, and ecologists are attentive given surface heat balance because it is a major factor transferred in the capacity of vegetation and the irrigation of crops. In hydrology, heat balance is important for the water stability of surfaces and water resources.

Heat is transferred via solid matter(conduction), liquids and gases (convection), and electromagnetic waves (radiation). Heat is normally transferred in a combination of these three types and randomly happens on its own.

So we can conclude that Heat transfer by the movement of a heated substance is called convection

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There are 1.31 x 1022 bromide ions in 2.00 g of \(MgBr_2\).

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Answer:

double displacement (metathesis) hope that helps!(^_^メ)

Explanation:

meh.

7. the pH of 0.81 M Mg(OH)₂ solution is 9.19.

8. the pH of 0.27 M pyridine solution is 9.11.

Mg(OH)₂ is a base which dissociates to produce two OH⁻ ions.

Mg(OH)₂ → Mg²⁺ + 2 OH⁻

Let the concentration of OH⁻ ions produced be x.

Therefore, the concentration of Mg²⁺ is 0.81-x

Mg(OH)₂ → Mg²⁺ + 2 OH⁻

Initial concentration (M)    0         0

Change (M)                 -x         +2x

Equilibrium Concentration  0.81-x      x     x

Using Kb for Mg(OH)₂,Kb = Kw/Ka

Kw = 1.0 × 10⁻¹⁴ at 25 °C.

For Mg(OH)₂,Kb = [Mg²⁺][OH⁻]²/Kw= (x)²/0.81 - x

Kb = 4.5 × 10⁻¹² = x²/0.81 - x

On solving the equation,x = 7.7 × 10⁻⁶M

Therefore, the concentration of OH⁻ ions = 2 × 7.7 × 10⁻⁶ = 1.54 × 10⁻⁵ M

To calculate the pH of the solution, use the formula:

pOH = - log [OH⁻]= - log 1.54 × 10⁻⁵pOH = 4.81pH = 14 - 4.81 = 9.19

Thus, the pH of 0.81 M Mg(OH)₂ solution is 9.19.

Let the concentration of OH⁻ ions produced be x.

Therefore, the concentration of C₅H₅NH⁺ is 0.27 - x.

C₅H₅N + H₂O ⇌ C₅H₅NH⁺ + OH⁻

Initial concentration (M)   0.27      0

Change (M)                -x       +x

Equilibrium Concentration  0.27-x     x

Using Kb for C₅H₅N,Kb = Kw/Ka

Kw = 1.0 × 10⁻¹⁴ at 25 °C.

For C₅H₅N,

Kb = [C₅H₅NH⁺][OH⁻]/[C₅H₅N]= (x) (x)/(0.27-x)Kb = 1.7 × 10⁻⁹

= x²/(0.27-x)

On solving the equation,

x = 1.3 × 10⁻⁵ M

Therefore, the concentration of OH⁻ ions = 1.3 × 10⁻⁵ M

To calculate the pH of the solution, use the formula:

pOH = - log [OH⁻]= - log 1.3 × 10⁻⁵pOH

= 4.89pH = 14 - 4.89 = 9.11

Thus, the pH of 0.27 M pyridine solution is 9.11.

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Answer:

Membrane

Explanation:

Unlike a bacteria , an animal cell contains membrane which bounds organelles.

First, we need to make the exponent of 10 the same for both.

So let's transform 6.5500 x 10^5 into some number x 10^3.

For this, we need to move the dot to the right, some places where it gives the number 3. In this case, 2 places.

655.00 x 10^3

now we can sum the numbers

8.6500 x 10^3 + 655.00 x 10^3 = 663.65 x 10^3

now we need to transform this number into scientific notation. For this, must have only one number before the dot(on the left side of the dot). We will move the dot to the left, 2 places:

6.6365 x 10^5

Answer: 6.6365 x 10^5

Answer:

Explanation:

Edmentum

The arrangement of electrons within an atom's orbitals is known as its electronic configuration. The atomic number, which is equal to the number of protons in every neutral atom, is the set quantity of electrons that make up each neutral atom.

The distribution of an element's atoms' electrons throughout several atomic orbitals is symbolically represented by the electronic configuration of that element.

A standardized nomenclature is used for expressing electron configurations, in which the energy level and type of orbital are written first, followed by the number of electrons in the orbital, which is expressed in superscript.

The correct matches are:

Zn: [Ar] 3d¹⁰ 4s²

Fe: [Ar] 3d⁶ 4s²

Sn: [Kr] 4d¹⁰5s²5p²

Cl: [Ne] 3s² 3p⁵

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Answer: True

Explanation:

The energy released when adding an electron is the energy released in the atomization reaction. This energy is called electron affinity. The electron affinity of Si is 133.6 KJ/mol.

Electron affinity of an atom is its tendency to capture an electron from other atoms towards its nucleus. The more the electron affinity the more will be its reactivity.

The minimum energy required to remove a loosely bound electron from the valence orbital is called its ionization energy. In the given reaction, silicon is accepting an electron to form its atomic state. Thus, it is releasing the energy.

This energy released during gaining one electron is equal to the electron affinity of silicon that is 133.6 kJ/mol.

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Mass of Sr(OH)₂ should be added to a 400 ml volumetric flask is 24.34 gm.

Let the mass of Sr(OH)₂ = P g

Molar mass of Sr(OH)₂ = 121.63 g/mol

Mole of Sr(OH)₂ = P gm/ 121.63 g mol⁻¹ = 0.00822 × P mol

[Sr(OH)₂] = (0.00822 × P mol) / 0.400 L = (0.2055 × P) M

[OH⁻] = 2 × [Sr(OH)₂] = 0.0411 P M

pH = 14

pOH = 14 - 14 = 0

[OH⁻] = 10⁰ = 1

∴ 0.0411 P M = 1

⇒ P = 24.34 gm

Hence, mass of Sr(OH)₂ should be added to a 400 ml volumetric flask is 24.34 gm.

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Answer:

1,6,8

Explanation:

Periodic Table- H=1.C=6,O=8

Hydrogen is H, Carbon is C, Oxygen is O

One molecule of the sample contains three different elements with atomic numbers 1,6 and 8.

Element is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.

Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.

The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.Each element has its own characteristic property.

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Your question is incomplete, but most probably your full question was,a sample substance has the chemical formula:

H2CO3

One molecule of the sample contains -

Two different elements with atomic numbers 1 and 27

Two different elements with atomic numbers 1, 6, and 8

Two different elements with atomic numbers 2 and 29

Two different elements with atomic numbers 2, 8 and 20

Three different elements with atomic numbers 1,6 and 8

A bond dipole refers to the separation of charge within a covalent bond due to differences in electronegativity between the two atoms.

This results in a partial positive charge on one atom and a partial negative charge on the other, creating a dipole moment. On the other hand, a molecular dipole moment is the overall dipole moment of a molecule, which takes into account the bond polarities and the molecular geometry.

If the bond polarities in a molecule are not symmetrical, the molecular dipole moment will not be zero, indicating a polar molecule. However, if the bond polarities are symmetrical, the molecular dipole moment will be zero, indicating a nonpolar molecule.  A bond dipole occurs when there is a difference in electronegativity between two atoms in a covalent bond, leading to an unequal distribution of electron density and creating a dipole moment.

This is represented by a vector pointing from the less electronegative atom to the more electronegative one. On the other hand, a molecular dipole moment is the overall polarity of a molecule resulting from the combination of all individual bond dipoles. It is determined by the molecular structure and the spatial arrangement of bond dipoles. If the bond dipoles cancel each other out due to symmetry, the molecule is nonpolar. Otherwise, it exhibits a net molecular dipole moment.

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Answer:

(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl

Explanation:

This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.

Answer:

c. electrical neutrality.

Explanation:

A crystalline  solid possesses a rigid and long-range order; its atoms, molecules, or ions occupy  specific positions. The arrangement of such particles in a crystalline solid is such that  the net attractive intermolecular forces are at their maximum.

Ionic crystals, particularly, have two important characteristics:

(1) They are composed of charged species.

(2) Anions and cations are generally quite different in size.

The forces holding the atoms together are electrostatic attractions. Examples of these types of crystals include NaCl, LiF, MgO, CaCO₃.

Since they are composed of anions and cations, in stoichiometric amount, they are to be said electrically neutral.

The given statement "When one pair of electrons is shared between the two atoms, a blank bond will be formed" is true. Because When a pair of electrons is shared between two atoms, a covalent bond is formed. Option A is correct.

A covalent bond is the type of a chemical bond which involves the sharing of electron pairs between two atoms. This sharing of electrons allows both atoms to achieve a more stable electron configuration, usually by filling their outermost electron shell.

Covalent bonds are most commonly formed between nonmetal atoms, since these atoms have a high electronegativity and a tendency to attract electrons towards themselves. In a covalent bond, the shared electrons are attracted to both atomic nuclei, creating a force that holds the atoms together.

Hence, A. True is the correct option.

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Answer:

1. Zn + HCl --> ZnCl + H2

2. when zinc reacts with hydrochloric acid, the zinc gets oxidized as chlorine is an electronegative element while the hydrochloric acid gets reduced as their is a removal of chlorine from the compound to give out hydrogen

3. it happens in our stomach as it releases hcl in the undigested food to convert it into soluble compounds and waste material for consumption by our body and excretion respectively.

Answer:

Q = 6.56 J

Explanation:

Given thatm

Mass of a sample of gold, m = 8.21 g

The temperature of the sample increase by 6.2°C.

We need to find heat added to the sample of gold. The heat required or added to raise the temperature is given by :

\(Q=mc\Delta T\)

c is the specific heat of gold, \(c=0.129\ J/g^{\circ} C\)

Putting all the values,

\(Q=8.21\times 0.129\times 6.2\\\\=6.56\ J\)

So, 6.56 J of heat is added to the sample of gold.

Answer:

b . Irradiated food is shown to not be radioactive.

Explanation:

If it can be proven that irradiated food is not radioactive, then it will effective dispute the idea that irradiated food are less safe to eat.

If it can be proven, that this is true, then it will challenge the idea that irradiated foods are not safe.

Answer:

i don't know

sorry i would help but  i don't know

Explanation:

The equation 2Al + _F₂ → 2AlF₃ is balanced by making the coefficient of fluorine, F₂ three (3)

To obtain the coefficient of fluorine, F₂ that will balanced the equation, we must obtain the balance equation.

The equation 2Al + _F₂ → 2AlF₃ can be balanced as illustrated below:

2Al + F₂ → 2AlF₃

There are 2 atoms of F on the left side and 6 atoms on the right side. It can be balanced by writing 3 before F₂ as shown below:

2Al + 3F₂ → 2AlF₃

Now, the equation is balanced.

Thus, we can conclude that the coefficient of fluorine, F₂ that balanced the equation is 3

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Answer:

177.1 L

Explanation:

The excersise can be solved, by the Ideal Gases Law.

P . V = n . R . T

In first step we need to determine the moles of gas:

We convert T° from, C° to K → 20°C + 273 = 293K

We convert P from mmHg to atm → 760 mmHg = 1atm

1Dm³ = 1L → 190L

We replace: 190 L . 1 atm = n . 0.082 . 293K

(190L.atm) / 0.082 . 293K = 7.91 moles.

We replace equation at STP conditions (1 atm and 273K)

V = (n . R .T) / P

V = (7.91 mol . 0.082 . 273K) / 1atm = 177.1 L

We can also make a rule of three:

At STP conditions 1 mol of gas occupies 22.4L

Then, 7.91 moles will be contained at (7.91 . 22.4) /1 = 177.1L

The equilibrium constant (Kₑq) for the reaction at the given temperature would be 0.051 × 0.087 / 0.97².

The equilibrium constant (Kₑq) is a measure of the extent of a chemical reaction at equilibrium. It is calculated by taking the ratio of the concentrations of the products to the concentrations of the reactants, each raised to the power of their respective stoichiometric coefficients.

In this case, the reaction involves the gases H₂, S₂, and H₂S. The given concentrations are 0.051 M for H₂, 0.087 M for S₂, and 0.97 M for H₂S. The stoichiometric coefficients of the reactants and products are not provided, so assuming a balanced equation, we can write the equilibrium constant expression as Kₑq = [H₂][a] [S₂[b] / [H₂S][c], where a, b, and c are the stoichiometric coefficients.

By plugging in the given concentrations, the expression for Kₑq becomes Kₑq = 0.051 × 0.087 / 0.97². Evaluating this expression gives the equilibrium constant for the reaction at the specified temperature.

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Answer:

Rb0H +(NH4)2CO3=Rb2CO3+NH4OH

Explanation:

using the chemical equation balancer

Answer:

Joule

Explanation:

This is the answer

Answer:

Explanation:

A form of severe weather is drought, which is a prolonged period of persistently dry weather (that is, absence of precipitation).This can cause wild fires which impact the growth of trees.They cause the tree the release carbon dioixide rather than store!

Hydrogen ion is smaller than hydrogen whereas hydride ion is bigger than a hydrogen atom .

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Answer:

Both aldehydes and ketones contain a carbonyl group a functional group with a carbon oxygen double bond, hence the carbonyl in aldehydes and ketones forms sp²hybridization.

Explanation:

The structure of carbonyl group is -C=O-

The hybridization of carbon can be identified by couting the number of surrounding atoms.

In carbonyl compounds, carbon is directly bonded with three atoms.

One is oxygen, and the other two are other carbons.

With oxygen carbon has a double bond.

Hence, this three corresponds to sp2 hybridization.

Thus, the given statement is correct.