What is ionization energy? What is fist ionization energy?

Hypothesis is a proposed explanation for an observable phenomenon. The term comes from the Greek word for "to suppose." Variables, on the other hand, are anything that can be changed or measured. Variables can be independent, dependent, or control variables. Learning activities titled “Hypothesis”, “Variables and Hypothesis” and “Constructing a Hypothesis” share similarities and differences with a question that comes in response to an observation and a scientific research question.

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Answer:

it is a acid. the answer is acid

Oxidation in chemistry occurs when the atoms of an element lose electrons and the oxidation state of the element increases while reduction occurs when the atom of an element gains electrons and reduces the oxidation number.

The atom being reduced is the oxidizing agent while the atom being oxidized is the reducing agent.

Oxidation number is the hypothetical charge of an atom within a molecule. The oxidation number of an element can be calculated as follows;

2x - 2(5) = 0

2x - 10 = 0

2x = 10

x = 5

2x - 6 = 0

2x = 6

x = 3

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Answer:

Fe(OH)3

Explanation:

if a compound dissolves in water any solvent, depends on polarity.

like dissolves like so whether your compound is polar or non-polar you solvent has to be whatever your compound is (for most cases, there are exceptions).

NaOH, Ba(OH)2, and KOH are all polar therefore they can dissolve in water, however Fe(OH)3 isn't.

Answer:

The amount of water vapor in air influence density. Water vapor is relatively light compared to diatomic Oxygen and diatomic Nitrogen - the dominant components in air. When vapor content increases in moist air the amount of Oxygen and Nitrogen are decreased per unit volume and the density of the mix decreases since the mass is decreasing.

Explanation:

This is due to the fact that a substance's chemical qualities, such as its molecular form, polarity, and functional groups, govern how it behaves and interacts with other substances.

By illustrating the spatial arrangement of atoms and chemical bonds within the molecule, chemical structure establishes the molecular geometry of a compound. In doing so, chemists are given a crucial visual depiction of a chemical formula.

In a chemical reaction, reactants come into contact with one another, atoms in the reactants break their connections with one another, and then the atoms reorganise and form new bonds to create the products.

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A molecule whose charge distribution is spherically symmetric when averaged over time is known as a nonpolar molecule. As the charges of nonpolar molecule oscillates, a temporary dipole moment exists at any given instant in a so-called nonpolar molecule.

CH₄ is methane.

HCl is hydrochloric acid.

H₂O is water.

NH₃ is ammonia.

Properties of nonpolar molecule:

Physical State: Nonpolar molecules are mainly existing as gases and less existence as liquids.

Nature: Nonpolar molecules are very soft in nature.

Solubility: Nonpolar molecules are insoluble in water or less soluble in water. ...

Conductivity: Nonpolar molecules are insulators since they have no chargeable particles.

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Explanation:

When working with ideal gases we usually have to work with the formula of the ideal gas law.

P * V = n * R * T

Where P is the pressure and we usually work in atm, V is the volume in L, n is the number of moles, R is the ideal gas constant and T is the temperature in K.

R = 0.082 atm*L/(mol*K)

V = ?

We will have to convert the temperature from °C to K and the P from psi to atm.

T(K) = T(°C) + 273.15

T = (273.15 + 15) K

T = 288.15 K

1 atm = 14.696 psi

P = 16.5 psi * 1 atm/(14.696 psi)

P = 1.12 atm

We still have to find the number of moles that we have in 4.5 g sample of oxygen gas. We will use the molar mass of oxygen gas to do that.

formula of oxygen gas: O₂

atomic mass of O = 16.00 amu

molar mass of O = 16.00 g/mol

molar mass of O₂ = 2 * 16.00 g/mol

molar mass of O₂ = 32.00 g/mol

mass of O₂ = 4.5 g

n = moles of O₂ = 4.5 g/(32.00 g/mol)

n = moles of O₂ = 0.14 moles

Finally we can replace all the values that we got into the formula and solve it for the volume to get the answer to our problem.

P * V = n * R * T

V = n * R * T/P

V = 0.14 moles * 0.082 atm*L/(mol*K) * 288.15 K/(1.12 atm)

V = 2.95 L

Answer: The volume of the gas is 2.95 L.

The concentration of free Hg²⁺ ions in the solution is extremely low, which is much less than the solubility product of Hg(OH)2, Ksp= 3.0×10⁻²⁶. Therefore, Hg(OH)₂ will not precipitate from the solution.

A solution is a homogeneous mixture of two or more substances. In a solution, the solute is uniformly dispersed in the solvent. The solute can be a solid, liquid, or gas, while the solvent is usually a liquid, such as water.

Solutions can be classified as dilute or concentrated, depending on the amount of solute present in the solution. A dilute solution has a low concentration of solute, while a concentrated solution has a high concentration of solute.

To determine whether Hg(OH)₂ will precipitate from the solution, we need to calculate the concentration of free Hg²⁺ ions in the presence of EDTA⁻⁴. We can use the formation constant (Kf) of HgEDTA⁻² to calculate the concentration of HgEDTA⁻² complex ion:

Hg²⁺ + EDTA⁻⁴ → HgEDTA⁻², Kf = 6.3×10²¹

The equilibrium constant expression for this reaction is:

Kf = [Hg]/([Hg²⁺][EDTA⁻⁴])

We can rearrange this equation to solve for the concentration of free Hg²⁺ ions:

[Hg²⁺] = [HgEDTA⁻²]/(Kf[EDTA⁻⁴])

We are given that the concentration of Hg(NO3)2 is 0.025 M, which means the concentration of  Hg²⁺ ions is also 0.025 M. We can assume that all the  Hg²⁺ ions are complexed with EDTA⁻⁴, so the concentration of HgEDTA⁻² complex ion is also 0.025 M.

Therefore,

[ Hg²⁺] = [HgEDTA⁻²]/(Kf[EDTA⁻⁴])

[ Hg²⁺] = (0.025 M)/(6.3×10²¹ × 0.10 M)

[ Hg²⁺] = 3.97 × 10⁻²⁷ M

The concentration of free Hg²⁺ ions in the solution is extremely low, which is much less than the solubility product of Hg(OH)2, Ksp= 3.0×10⁻²⁶. Therefore, Hg(OH)2 will not precipitate from the solution.

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Answer:

Endothermic and exothermic reactions are chemical reactions that absorb and release heat, respectively. A good example of an endothermic reaction is photosynthesis. Combustion is an example of an exothermic reaction. The categorization of a reaction as endo- or exothermic depends on the net heat transfer.

Explanation:

Answer:

An endothermic reaction

Explanation:

The heat is being absorbed so it's and endothermic reaction

Answer:

24.31 g/mol.

Explanation:

moles =mass/molar mass

n=w/m

Note that the above prompt on Ecology draws it's analysis form a well known story which have been told visually called "The Lion King".

The answers are:

1) Biotic Factors, simply put are living things

2 examples of things from Lion King Introduction are:

3) Abiotic factors are Non -living things.

4) Examples from the introduction are:

5) the symbiotic relationship is called: commensalism.

Long-term biological interactions known as commensalism occur when individuals of one species benefit while those of the other species suffer neither advantages nor harm.

Ecology which is the study of the environment, allows  a person  to comprehend how different types of creatures coexist in various kinds of physical settings.

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Full Question:

Although part of your question is missing, you might be referring to this full question:

1) What is Biotic Factors

2) List three biotic factors from the Lion King introduction

3) What is Abiotic factors?

4) List three Abiotic factors from the Lion King introduction

5) The bird riding on the tusks of the elephant feed on insects the elephant stirs up. What kind of symbiotic relationship exists between the two?

Answer:

4 millllllermeeters jb

B. Wrapping the wire around a piece of paper

the heat energy required to take it to the melting point is 420J.

The heat capacity, abbreviated Cp, is the amount of heat needed to elevate a mole of a substance's heat content by precisely one degree Celsius.

A material has more thermal energy the hotter it is, says basic thermodynamics. Additionally, when a chemical is present in greater concentrations at a particular temperature, it will have a higher total thermal energy.

Mathematically,

Q = mc∆T

Where,

Q = quantity of heat absorbed by a body

m = mass of the body

∆t = Rise in temperature

C = Specific heat capacity of a substance depends on the nature of the material of the substance.

S.I unit of specific heat is J kg-1 K-1.

Given,

An ice cube of mass = m=25g

initial temperature = T1 = -8°C

final temperature = T2 = 0°C

Heat capacity for solid water = c = 2.1J/g°C

According to heat energy required to take it to the melting point,

Q = mc∆T

Q = 25g×2.1J/g°C × (0+8) °C

Q = (25×2.1×8) J

Q = 420J

Hence, the heat energy required to take it to the melting point is 420J.

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Answer:

ethyl ethanoate

Explanation:

it helps you

Answer:

3.48 x 1013 N2 molecules

step-by-step explanation:

Lets set up our equation first

P = 1.00 x 10-6 mm Hg T = 0.0° C + 273 = 273 K

We are given the V = 985 mL ,

R = 0.0821 L·atm/mol·K

Now use the ldeal gas law, but we are solving n, amount of substanvce

PV = nRT, we will change this equation to ;

n = PV/RT

n = 1.00 x 10-6 mm x 1 atm/760 mm x 985 mL x 1 L/103

mL/

(0.0821 L·atm/mol·K x 273 K) = 5.78 x 10-11 moles N2

nmolecules = 5.78 x 10-11 moles N2 x 6.02 x 1023 N2 molecules/1 mol N2

Answer:

give more details

Explanation:

The correct mass-volume relationship at STP is A. 32.00 g of \(O_{2}\) react with an excess of \(H_{2}\) to produce (2 ´ 22.4) L of \(H_{2}O\)

To determine the correct mass-volume relationship at STP (Standard Temperature and Pressure), we need to consider the stoichiometry of the balanced chemical equation, the molar masses of the substances involved, and the molar volume of gases at STP.

The balanced equation indicates that 2 moles of \(H_{2}\) react with 1 mole of \(O_{2}\) to produce 2 moles of \(H_{2}O\). At STP, 1 mole of any gas occupies 22.4 liters.

In option A, it states that 32.00 g of \(O_{2}\) react with an excess of \(H_{2}\) to produce (2 × 22.4) L of \(H_{2}O\). The molar mass of \(O_{2}\) is 32.00 g/mol, which corresponds to 1 mole of \(O_{2}\). According to the balanced equation, 1 mole of \(O_{2}\) reacts to form 2 moles of \(H_{2}O\). Therefore, the given mass of \(O_{2}\) (32.00 g) corresponds to 1 mole of \(O_{2}\), which will produce 2 moles of \(H_{2}O\).

Since 1 mole of any gas occupies 22.4 L at STP, 2 moles of \(H_{2}O\) would occupy (2 × 22.4) L, which is equal to 44.8 L. Hence, the correct answer is A, where 32.00 g of \(O_{2}\) react with an excess of \(H_{2}\) to produce (2 × 22.4) L of \(H_{2}O\). This choice represents the correct mass-volume relationship at STP based on the given equation and stoichiometry. Therefore, Option A is correct.

The question was incomplete. find the full content below:

Consider the equation. 2\(H_{2}\)(g) + \(O_{2}\)(g) >>>> 2\(H_{2}O\)(g)

Which represents the correct mass-volume relationship at STP?

A. 32.00 g of \(O_{2}\) react with an excess of \(H_{2}\) to produce (2 ´ 22.4) L of \(H_{2}O\)B. 2.00 g of \(H_{2}\) react with an excess of \(O_{2}\) to produce (2 ´ 22.4) L of \(H_{2}O\).

C. 32.00 g of \(O_{2}\) react with an excess of \(H_{2}\) to produce 22.4 L of \(H_{2}O\)

D. (2 ´ 2.00) g of \(H_{2}\) react with an excess of \(O_{2}\) to produce 22.4 L of \(H_{2}O\).

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Answer:

C

Explanation:

edg

Answer:

C

Explanation:

got it right on Edge

ANSWER

The usual oxidation state of lithium is +1

EXPLANATION

Lithium is a group 1 metal with an atomic number of 3. Its electronic configuration of lithium atom is written below as

In the above configuration, lithium has one electron in its outermost shell. Hence, the valence of electron is 1

During chemical reaction, lithium will lose an electron to attain it octet structure and it will attain the electronic configuration of Helium

Since it will be losing one electron, therefore it usual oxidation number is +1u

The value of ΔG at 25 °C for the given reaction is: ΔG = -370.4 kJ/mol + 0 = -370.4 kJ/mol So, the correct answer is -370.4 kJ/mol

To determine the value of ΔG (Gibbs free energy) at 25 °C for the given reaction:

25 (s, rhombic) + 3/2 \(O_2\)(g) → \(2SO_3\)(g)

We can use the equation:

ΔG = ΔG° + RT ln(Q)

where:

ΔG is the standard Gibbs free energy change

ΔG° is the standard Gibbs free energy change under standard conditions

R is the gas constant (8.314 J/(mol·K) or 0.008314 kJ/(mol·K))

T is the temperature in Kelvin (25 °C = 298 K)

Q is the reaction quotient, which is the ratio of the concentrations of the products to the concentrations of the reactants at a given point during the reaction.

Given that ΔG° is -370.4 kJ/mol, we can plug the values into the equation:

ΔG = -370.4 kJ/mol + (0.008314 kJ/(mol·K) * 298 K) * ln(Q)

Now, we need to determine the value of Q. Since all reactants and products are in their standard states, Q = 1, as their concentrations are taken to be 1.

ΔG = -370.4 kJ/mol + (0.008314 kJ/(mol·K) * 298 K) * ln(1)

Since ln(1) = 0, the term (0.008314 kJ/(mol·K) * 298 K) * ln(1) becomes 0.

Therefore, the value of ΔG at 25 °C for the given reaction is:

ΔG = -370.4 kJ/mol + 0 = -370.4 kJ/mol

So, the correct answer is -370.4 kJ/mol.

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Answer:

D

Explanation:

you can see it from the beginning its developing

Mercury is a heavy metal of considerable toxicity

Scientific literature reveals various plants and plant derived natural products, i.e., phytochemicals, which can alleviate experimentally induced mercury toxicity in animals.

Phytochemicals have great antioxidant potential and are of great interest due to their beneficial effects on health of human beings, and they give immense health benefits to the consumers.The effects of phytochemical-rich foods on bioaccessibility of mercury in fish tissue (the amount of mercury that is released from fish into gastrointestinal tract fluid following a simulated digestion) were investigated using an in vitro digestion.

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Answer:5m

Explanation:Because in the question it say per minute so it would be 5 times m

Answer:

Explanation:

The aim of this question is to draw the structure of genistein and determine the number of atoms with sp² hybridization in the molecule.

From the image below, we will see the lewis structure of genistein. From the image, the blue asterisk atoms are sp² hybridized and the red marked atoms are sp³ hybridized.

We will also notice that all the carbon atoms contain 3 σ-bonds with no lone pair of electrons.

Using the knowledge of Valence shell electron repulsion theory (VSEPR), the above-mentioned carbon atom is said to be sp²hybridized.

Also, the oxygen atoms which are doubly bounded contains 1 σ-bond and 2 lone pair electrons. These oxygen atoms are also sp² hybridized.

Finally, the singly bonded oxygen atom is composed of 2 σ-bonds and 2 lone pair electrons. This makes it to be sp³ hybridized.

Altogether, we have a total of 16 sp² hybridized atoms and 4 sp³ hybridized atoms.

Answer:

AgNO3 + KI → AgI + KNO3

Explanation:

Yes, it's produced potassium nitrate

Answer:

IUPAC name is butanol

I hope it's helps you

The atomic number of this atom : 8

Given

Atomic model (attached)

Required

The atomic number

Solution

To determine the atomic number of an element, we can look at the number of electrons or the number of protons, because

atomic number = number of protons = number of electrons in neutral atoms

While the mass number is the number of neutrons + the number of protons located in the atomic nucleus

The charge of each of these atomic sub particles:

If we look at this atomic model, there are 8 electrons in the shell, consisting of 2 electrons in the first shell and 6 electrons in the second shell (which can also be called valence electrons)

Whereas in the atomic nucleus there are 8 protons and 10 neutrons

Answer:8

Explanation: