3. What factors affect solubility?

can anyone help its due today ​

It will be lower conductivity from a solute that does not dissolve well in solution.

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[tex]Br_{3} CCOOH[/tex]+[tex]F_{3} CCOONa[/tex] → [tex]F_{3} CCOONaH + Br_{3} CCOO^{-}[/tex]

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Answer: Atomic number is the number of protons 

Atomic mass subtract

atomic number is the number of neutrons

Atomic number is the number of electrons in a neutral atom

Explanation:The atomic number is assigned based on the number of protons, so the atomic number is always the same as the number of protonsAtomic mass is the sum of protons and neutrons. Protons and neutrons both have masses of 1 amu, but the mass of electrons is negligible so it is left out. The atomic mass of an element is never a round number because it's a weighted average of all the isotopes of the element. Just round the number to the nearest integer get the most likely atomic mass. In a neutral atom number of protons = number of electrons since there is no overall charge. In an ion, add an electron for every negative charge and subtract an electron for every positive charge (ex. Mg2+ has 10 electrons because its atomic number is 12 and you subtract two electrons for the 2+ charge)

By ideal gas approximation, the final pressure is 4 times greater than the initial pressure.

We need to know about the ideal gas theory to solve this problem. The ideal gas is assumed that there is no interaction between particles in a gas. It can be determined by the equation

P . V = n . R . T

where P is pressure, V is volume, n is the number of moles gas, R is the ideal gas constant (8.31 J/mol.K) and T is temperature.

From the question above, we know that

V2 = 2V1

T2 = 1/2 . T1

n1 = n2 = n

When the initial and final temperature is the same, we can use the ratio of pressure as

P1 / P2 = (n1 . R . T1 / V1) / (n2 . R . T2 / V2)

P1 / P2 = (n . R . T1 / V1) / (n . R . (1/2.T1) / 2V1)

P1 / P2 = 4

Hence, the final pressure is 4 times greater than the initial pressure.

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The pH of a 0.0100 M sodium benzoate solution is 8.09.

c(C₆H₅COONa) = 0.0100 M; concentration of the salt sodium benzoate.

Balanced chemical equation for reaction of benzoate ion (from the salt sodium benzoate) with water:

C₆H₅COO⁻(aq) + H₂O  ⇄ C₆H₅COOH(aq) + OH⁻(aq)

Kb = 1.5 × 10⁻¹⁰; constant of base

Kb = c(C₆H₅COOH) × c(OH⁻) / c(C₆H₅COO⁻)

c(C₆H₅COOH) = c(OH⁻) = x

1.5 × 10⁻¹⁰ = x² ÷ 0.0100 M

x = c(OH⁻) = 1.225 × 10⁻⁶ M

pOH = -log c(OH⁻)

pOH = -log (1.225 × 10⁻⁶ M)

pOH = 5.91

pH = 14 - 5.91

pH = 8.09

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The pH of a solution is 9.02.

c(HCN) = 1.25 M; concentration of the cyanide acid

n(NaCN) = 1.37 mol; amount of the salt

V = 1.699 l; volume of the solution

c(NaCN) = 1.37 mol ÷ 1.699 l

c(NaCN) = 0.806 M; concentration of the salt

Ka = 6.2 × 10⁻¹⁰; acid constant

pKa = -logKa

pKa = - log (6.2 × 10⁻¹⁰)

pKa = 9.21

Henderson–Hasselbalch equation for the buffer solution:

pH = pKa + log(cs/ck)

pH = pKa + log(cs/ck)

pH = 9.21 + log (0.806M/1.25M)

pH = 9.21 - 0.19

pH = 9.02; potential of hydrogen

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The half-life (in hours) for 86Rb is mathematically given as

half-life= 447.1 hr

This is further explained below.

Generally, the equation for k is  mathematically given as

k = (1/t)ln(a/x)

Where

No of mol of Beta particle

β= (8.87*10^16/(6.023*10^23))

β = 1.47*10^-7 mol

Therefore

k = (9.52*10^-5)-(1.473*10^-7)

= 9.50527*10^-5 mol

Hence

k = (1/1)ln((9.52*10^-5)/(9.50527*10^-5))

k = 0.693/t0.5

t0.5=half lifetime

t0.5= 0.693/(0.00155)

half-life= 447.1 hr

In conclusion, the half-life (in hours) for 86Rb

half-life= 447.1 hr

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Biomagnification is a dangerous concept because toxic chemicals concentrate as they pass up the food chain. group of answer choices

What is biomagnification?

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Taking into account the reaction stoichiometry, 11.2 grams of nitrogen gas is required to react completely with excess hydrogen gas to produce 13.6 g of ammonia.

In first place, the balanced reaction is:

3 H₂ + N₂  → 2 NH₃

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

The following rule of three can be applied: If by reaction stoichiometry 34 grams of NH₃ are produced by 28 grams of N₂, 13.6 grams of NH₃ are produced by how much mass of N₂?

mass of N₂= (13.6 grams of NH₃× 28 grams of N₂)÷ 34 grams of NH₃

mass of N₂= 11.2 grams

Finally, 11.2 grams of nitrogen gas is required to react completely with excess hydrogen gas to produce 13.6 g of ammonia.

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The density of the He atom is 12.69 g/cm³.

d(He) = 0.1 nm = 1 × 10⁻⁸ cm; a diameter of helium atom

V(He) = 1/6 × (1 × 10⁻⁸ cm)³ × 3.14

V(He) = 5.23 × 10⁻²⁵ cm³; volume of helium atom

m(He) = 4 amu; mass of helium atom

d(He) = m(He) / V(He)

d(He) = 4 × 1.66 × 10⁻²⁴ g / 5.23 × 10⁻²⁵ cm³

d(Cr) = 12.69 g/cm³; density of the helium atom

Volume of the helium is the measure of the amount of space occupied by the helium.

Diameter or the atomic radius of an atom is a measure of the size of that atom. It is distance from the center of the nucleus to the outermost isolated electron of an atom.

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Answer:

D

Explanation:

Opposite charge

347.8 grams of sodium hydroxide will be formed.

Balanced chemical equation for reaction of sodium with water:

2Na + 2H₂O → 2NaOH + H₂

m(Na) = 200 g; mass of sodium

M(Na) = 23 g/mol; molar mass of sodium

n(Na) = m(Na) ÷ M(Na).

n(Na) = 200 g ÷ 23 g/mol.

n(Na) = 8.695 mol; amount of sodium.

From chemical equation: n(Na) : n(NaOH) = 1 : 1.

n(NaOH) = 8.695 mol; amount of sodium hydroxide

M(NaOH) = 40 g/mol; molar mass of sodium hydroxide

m(NaOH) = 8.695 mol × 40 g/mol

m(NaOH) = 347.8 g; mass of sodium hydroxide

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Answer:

Valine

Explanation:

Answer: because without them we can't produce any type of substances as for producing new products physical or chemical change is necessary

Explanation:

When the Earth's mass is increased moon would spiral toward Earth.

The Moon, the fifth-largest moon in the solar system, is the sole natural satellite of Earth. Our planet's wobble is lessened and our climate is moderated by the moon's existence. The Moon is approximately 240,000 miles away from Earth (385,000km). The exosphere, the Moon's extremely thin atmosphere,

Earth's gravitational pull is influenced by its mass. The moon would move towards earth if the mass increased since the gravitational force would likewise increase.Likewise,The moon would move farther away if the mass reduced since the gravitational force would likewise decrease.The moon is close to the earth and visible at night because of gravity.

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The levels of organization from largest to smallest are - organism, organ system, organ, tissue, and cell.

Therefore, option (D) is correct.

The cell is the basic or fundamental unit of life of an organism.

A Group of cells with similar shapes and functions combines to form tissues.

Then the tissues organize to form organs.

A group of organs with similar functions combine to form an organ system.

A group of organ systems organizes to form an organism.

Hence, the correct order of levels of organization from largest to smallest is - organism, organ system, organ, tissue, and cell.

Option (D) is correct.

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Answer:

freezing point, i think.

Explanation:

freezing point is the point at which all substances turn solid, this varies based on what you have, but this characteristic temperature is freezing point.

According to Sigmund Freud, his dream was most likely an example of wish fulfillment when he dreamt about the coworker having a terrible accident.

This is defined as the process in which a desire is fulfilled through and involuntary thought process such as dreams etc.

Sigmund Freud is regarded as the father of psychoanalysis which was used to treat various types of mental illnesses and he was involved in the study of wish fulfillment.

Wish fulfillment is the process in which desire is fulfilled through involuntary process such as dream and in this scenario, Calvin was being bullied by a coworker and he night he dreamed that the coworker had a terrible accident which therefore means that he depicted wish fulfillment in this category.

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At the start of the reaction, value of reaction quotient  is zero as no product is being formed.

The reaction quotient is a measure which signifies the relative amounts of reactants and products present in a reaction at any given time.

For any reversible reaction, the value of reaction quotient can be calculated by multiplying the product concentration raised to their moles and then dividing it by the product of reactant concentration which is also raised to their moles.

At the start of the reaction, as no product is formed so its concentration is zero and thereby this concentration divided by the reactant concentration gives a value of zero as the value of reaction quotient.Reaction quotient is closely related to equilibrium constant .

Unlike equilibrium constants which are always calculated when a reaction is at equilibrium reaction quotients can be calculated irrespective of the nature of equilibrium of a reaction.

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Answer:

d. Oxygen

Explanation:

- Water is not an element but a compound made of hydrogen and oxygen elements

- Air is a compound made of gases such as oxygen, nitrogen, rare gases and carbondioxide...

- Sugar is an organic compound (sucrose) made of carbonyl carbons and hydrocarbons

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The molecular formula becomes [tex]C_{2}H_{4}O_{2}[/tex]

A compound is a substance made of two or more elements in fixed proportions.

the empirical formula tells us the relative ratios of different atoms in a compound. The ratios hold true on the molar level as well. Thus, [tex]H_{2}O[/tex] is composed of two atoms of hydrogen and 1 atom of oxygen.

The empirical formula is [tex]C_{}H_{2}O[/tex]

Molar mass is 60 g/mol

x*C + 2x*H + x*O = 60

Where x is the number of atoms of the element

12*x + 2*x + 16*x =60

30*x = 60

x = 60 / 30

x= 2

Thus the molecular formula becomes C2H4O2

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The major organic product that is obtained from the reaction is (a) cyclohexanol.

What is a major product?

Chemical reactions take place all around us, including during food digestion in our bodies and the production of light from the sun. Before beginning any chemical processes, it is essential to comprehend physical and chemical changes. A burning candle serves as the best example of a physical and chemical transformation.

The main product of a reaction would be the one that is more stable and hence most likely to form. Propene added electrophilically to HBr would be one instance.

The major organic product that is obtained from the reaction is (a) cyclohexanol. The ketone is reduced to alcohol via proper reagents and conditions.

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By doing scientific experiment we can prove inference about the acidity of the paper is true.

The experiment is nothing but to do the test of the hypothesis and are the main foundation of the scientific method, the steps include Make an observations, form hypothesis, conduct experiment, evaluation of result.

Then accept or reject the hypothesis from the evaluated result, if rejected make new hypothesis; Another important factor is variable which is compulsorily added to the experiment.

Three major types of variables included like dependent, independent and controlled variables.

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A molecule with 4 single bonds (and any number of lone pairs) could have the tetrahedral geometry.

For example carbon(IV) chloride (CCl₄). There are four single covalent bonds between one carbon atom and four chlorine atoms (see the picture below).

Carbon has sp3 hybridization (hybridize one s-orbital and three p-orbitals) and four chlorine atoms are positioned symmetrically as corners in a tetrahedral configuration. Because of symmetrical geometry, carbon tetrachloride is non-polar molecule.

Electron configuration of carbon: ₆C 1s² 2s² 2p².

Electron configuration of chlorine: ₁₇Cl 1s² 2s² 2p⁶ 3s² 3p⁵.

The ammonium ion has exactly the same shape as methane, because it has exactly the same electronic arrangement, ammonium ion is tetrahedral (sp3 hybridized).

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Mercury has a specific weight of 133 kn/m^3 when the temperature is 20C.

Density of given mercury = 133kg/m3

Density of water = 1000 kg/m3

specific gravity of mercury = Density of Hg/ Density of H20

= 133/1000 = 0.133

0.133 is the specific gravity of given Hg.

What is specific gravity?

The ratio of the densities of two different objects or substances is known as specific gravity. The ratio of the substance's density to the density of water is the most common way to define specific gravity.

Given, specific weight of 133 kg/m^3

Thus, Density of given mercury = 133kg/m3

Density of water = 1000 kg/m3

Thus, specific gravity of mercury = Density of Hg/ Density of H20

= 133/1000 = 0.133

0.133 is the specific gravity of given Hg.

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Enzymes are specific or picky. So the enzyme that works with a chemical reaction of triglycerides will work with more triglycerides.

In living organisms, enzymes are kinds of proteins that work as catalysts and accelerate the rate of chemical reactions without consuming themselves.

Enzymes are essential ingredients for humans as they are responsible for respiration, nerve function, and food digestion.

Moreover, these proteins are also vital for catabolic and anabolic reactions as they build and break substances.

These are found in all living things and are synthesized naturally in the human body.

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The balanced equation is as follows:

2KClO3 → 2KCl + 3O2

first we will calculate number of atoms in reactant as well as product side.

In the given reaction,

KClO3 → KCl + O2

Number of atoms on reactant side are as follows:

K = 1

Cl = 1

O = 3

Number of atoms on product side are as follows:

K = 1

Cl = 1

O = 2

Here, we can see that number of oxygen atom on reactant side is not equal to the number of oxygen atom on product side.

Hence to balance the equation we will multiply KClO3 by 2 on reactant side and KCl by 2, O2 by 3 on product side.

(KClO3)2 → (KCl)2+ (O2)3

Therefore the balanced equation will be:

2KClO3 → 2KCl + 3O2

Now, number of atoms on reactant side are equal to the number of atom on product side.

The coefficient used to balance out the equation are 2 and 3.

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The general formula for alkenes is CnH2n, the formula with hydrogen count double the carbon count should be the correct formula for alkene and that is d. C3H6.

What are alkenes?

Alkenes, commonly known as olefins, are organic unsaturated hydrocarbons that have one or more carbon-carbon double bonds in their chemical structure and are composed of carbon and hydrogen atoms.

Alkenes are unsaturated hydrocarbons with a double bond between the carbon atoms. Carbon atoms are connected by at least one double bond. The general formula for alkenes is C n H 2n. Olefin is frequently substituted with alkenes. The word "olefin" comes from the Greek phrase "olefin gas," which denotes the production of oil.

Since, their general formula is CnH2n, the formula with hydrogen count double the carbon count should be the correct formula for alkene and that is d. C3H6.

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