define conjugate Base and conjugate acid​

The correct categorization of the solutions is:a. KCl - Neutral

b. ZnCl2 - Acidic

c. Ba(C2H3O2)2 - Basic

d. NH4I - Acidic

e. NaNO3 - Neutral

To determine whether a 0.5M solution of each salt is acidic, basic, or neutral, we need to analyze the nature of the ions present in the solution.

a. KCl: When KCl is dissolved in water, it dissociates into K+ and Cl- ions. Both K+ and Cl- are spectator ions and do not contribute to the acidity or basicity of the solution. Therefore, the solution is neutral.

b. ZnCl2: When ZnCl2 is dissolved in water, it dissociates into Zn2+ and 2Cl- ions. The presence of Zn2+ ions in the solution can hydrolyze water molecules, resulting in the formation of H+ ions. Therefore, the solution is acidic.

c. Ba(C2H3O2)2: When Ba(C2H3O2)2 is dissolved in water, it dissociates into Ba2+ and 2C2H3O2- ions. The acetate ions (C2H3O2-) can hydrolyze water, leading to the formation of OH- ions. Therefore, the solution is basic.

d. NH4I: When NH4I is dissolved in water, it dissociates into NH4+ and I- ions. The presence of NH4+ ions in the solution can undergo a weak hydrolysis, resulting in the formation of H+ ions. Therefore, the solution is acidic.

e. NaNO3: When NaNO3 is dissolved in water, it dissociates into Na+ and NO3- ions. Both Na+ and NO3- ions are spectator ions and do not contribute to the acidity or basicity of the solution. Therefore, the solution is neutral.

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Answer:

PbBr2 + LiNO3

And goodluck

In the citric acid cycle , beginning with one of the molecule of isocitrate and ending with the fumarate, the ATP molecules can made through the substrate-level phosphorylation is one molecule.

In the citric acid cycle, the substrate level phosphorylation is the high energy of the phosphate group in the organic molecule. it transfers to the ADP to produces the ATP. it is the metabolic reaction and form the ATP molecules. The citric acid cycle is called as Krebs cycle also.

Thus, the number of ATP molecules form during the citric acid cycle that start with the one molecule of the isocitrate and end with the fumarate is the one molecule.

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The properties of a natural resource that make it useful for humans as a material or energy source is the ability to convert mass into energy and vice versa.

The expression natural resources make reference to all types of matter and energy extracted from nature that can be used to produce goods and services.

Some examples of natural resources include for example irreversible resources such as fossil fuels (i.e., oil, or coal, gas, minerals such as metals, rocks, etc) as well as those based on the use of reversible energy such as eolic air energy, solar radiation or sunlight, soil and hydric resources or water.

Therefore, with this data, we can see that natural resources can be defined as any material and or energy obtained from nature that may be irreversible or reversibly used to produce goods and services.

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The concentration of H2SO4 is  0.176 M. The number of moles of H2SO4 is 0.0165 moles.

The equation of the reaction is;

2KOH(aq) + H2SO4(aq) ------> K2SO4(aq) + H2O(l)

The number of moles of KOH = 1.85 g/56 g/mol = 0.033 moles

concentration = number of moles /volume

volume = 200 cm3 or 0.2 L

concentration of KOH = 0.033 moles/0.2 L = 0.165 M

From the titration formula;

CAVA/CBVB =na/nb

CA = concentration of acid

VA = volume of acid

CB = concentration of base

VB = volume of base

na = number of moles of acid

nb = number of moles of base

Making CA the subject of formula;

CA = CBVBna/VAnb

CA = ?

CB = 0.165 M

VA =  9.35 cm3

VB = 20.0 cm3

na = 1

nb =2

CA = CBVBna/VAnb

CA = 0.165 M ×  20.0 cm3  × 1/9.35 cm3 × 2

CA = 0.176 M

The concentration of sulphuric acid is 0.176 M

From the reaction equation;

2 moles of KOH reacts with 1 mole of H2SO4

0.033 moles of KOH reacts with 0.033 moles ×  1 mole/2 moles

= 0.0165 moles of H2SO4

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The heat absorbed by the engine block when its temperature is raised from 20°C to 90°C is 665,640 J.

To calculate the heat absorbed by the engine block, we can use the equation:

Q = mcΔT

where Q is the heat absorbed, m is the mass of the engine block, c is the specific heat capacity of steel, and ΔT is the change in temperature.

First, we need to calculate the specific heat capacity of steel. The specific heat capacity of steel is typically around 0.45 J/g°C.

Using this value and the given values of mass and temperature change, we can calculate the heat absorbed by the engine block as follows:

Q = (21080 g) x (0.45 J/g°C) x (90°C - 20°C)

Q = 21080 g x 0.45 J/g°C x 70°C

Q = 665,640 J

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6.02 x \(10^{20\) formula units of MgCl₂ is equal to 0.1 moles of MgCl₂.

To convert formula units of MgCl₂ to moles of MgCl₂, we need to use Avogadro's number, which relates the number of formula units to the number of moles.

Avogadro's number (NA) is approximately 6.022 x 10^23 formula units per mole.

Given that we have 6.02 x 10^20 formula units of MgCl₂, we can set up a conversion factor to convert to moles:

(6.02 x 10^20 formula units MgCl₂) * (1 mol MgCl₂ / (6.022 x 10^23 formula units MgCl₂))

The formula units of MgCl₂ cancel out, and we are left with moles of MgCl₂:

(6.02 x 10^20) * (1 mol / 6.022 x 10^23) = 0.1 mol

Therefore, 6.02 x 10^20 formula units of MgCl₂ is equal to 0.1 moles of MgCl₂.

It's important to note that this conversion assumes that each formula unit of MgCl₂ represents one mole of MgCl₂. This is based on the stoichiometry of the compound, where there is one mole of MgCl₂ for every one formula unit.

Additionally, this conversion is valid for any substance, not just MgCl₂, as long as you know the value of Avogadro's number and the number of formula units or particles you have.

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The volume of the CO2 gas is approximately 21.0 L.

We can use the ideal gas law equation

\(PV = nRT\)

where

We need to convert the temperature from Celsius to Kelvin:

T = 273 + 43 = 316 K

Next, we can calculate the amount of gas (n) using the mass of CO2 and its molar mass:

n = m/M

where m is the mass of the gas and M is the molar mass of CO2.

Molar mass of CO2 = 12.01 + 2(16.00) = 44.01 g/mol

n = 45 g / 44.01 g/mol = 1.022 mol

Now we can rearrange the ideal gas law to solve for the volume:

V = nRT/P

V = (1.022 mol)(0.0821 L·atm/mol·K)(316 K)/(1.24 atm)

V = 21.0 L

Therefore, the volume of the CO2 gas is approximately 21.0 L.

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Answer:

When all molecules in a system stop moving completely, there is zero thermal energy

Explanation:

It is impossible to reach though

Answer: MCCCMC

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Answer:

To calculate the mole fraction of alcohol in vodka, we need to know the volume fraction of alcohol in vodka, since ethanol and water have different densities.

75 proof vodka means it contains 37.5% ethanol by volume. So for 100 mL of vodka, there are 37.5 mL of ethanol and 62.5 mL of water.

The mass of 37.5 mL of ethanol is:

37.5 mL * 0.789 g/mL = 29.5875 g

The mass of 62.5 mL of water is:

62.5 mL * 1.00 g/mL = 62.5 g

The total mass of 100 mL of vodka is:

29.5875 g + 62.5 g = 92.0875 g

The mole fraction of alcohol in vodka is:

moles of ethanol / (moles of ethanol + moles of water)

To calculate the moles of ethanol, we can divide the mass of ethanol by its molar mass:

moles of ethanol = 29.5875 g / 46.07 g/mol = 0.6412 mol

To calculate the moles of water, we can divide the mass of water by its molar mass:

moles of water = 62.5 g / 18.02 g/mol = 3.4739 mol

The mole fraction of alcohol in vodka is therefore:

0.6412 mol / (0.6412 mol + 3.4739 mol) = 0.155

To calculate the molarity of alcohol in vodka, we need to divide the moles of ethanol by the volume of the vodka in liters:

moles of ethanol = 0.6412 mol

volume of vodka = 100 mL = 0.1 L

molarity of ethanol = moles of ethanol / volume of vodka

molarity of ethanol = 0.6412 mol / 0.1 L = 6.412 M

Therefore, the molarity of alcohol in vodka is 6.412 M.

The names of the given compounds are as follows:

a. NaBr = Sodium bromide

b. Rb\(_2\)O = Rubidium oxide

c. CaS = Calcium sulfide

d. AlI\(_3\) = Aluminium iodide

The formulas for the given compounds are as follows:

e. Strontium fluoride = SrF\(_2\)

f. Aluminum selenide = Al\(_2\)Se\(_3\)

g. Potassium nitride = K\(_3\)N

h. Magnesium phosphide = Mg\(_3\)P\(_2\)

This is the binary nomenclature of ionic compounds which involves both metals as well as non-metals. Metal is always named at the start without any prefix or suffix, while the name of the non-metals is placed after the metal in abbreviated form with the suffix "-ide".

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Answer:

Average weather conditions of a region over the long term

Explanation:

Climate is the long-term average of weather, typically averaged over a period of 30 years. More rigorously, it denotes the mean and variability of meteorological variables over a time spanning from months to millions of years.

Answer:

Product one: (2S, 3R)-3-chloro-2-butanol

Product two: (3S, 2R)-3-chloro-2-butanol

Explanation:

The IUPAC  name of the products following IUPAC guidelines are :

Product one: (2S, 3R)-3-chloro-2-butanol

Product two: (3S, 2R)-3-chloro-2-butanol

attached below is a pictorial representation of the formation of the 3-chloro-2-butanol via backside attack of Nucleophile

The carbocation intermediate in step 1 of the SN1 mechanism is an sp2 hybridized carbon is the 2-ol -3 Methyl hexene formed ftom the 2cholro 3 Methyl hexene in the presence of methanol.

Its molecular geometry is trigonal planar, consequently taking into consideration unique factors of nucleophilic attack, left and rightbranch of chemistry that offers with the spatial association of atoms and organizations in molecules. : the spatial association of atoms and organizations in a compound and its relation to the residences of the compound.

Stereochemistry is the department of chemistry that involves “the have a look at of the unique spatial preparations of atoms in molecules”. Stereochemistry is the systematic presentation of a particular subject of technological know-how and generation that historically calls for a quick initial tour into history.

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Answer:

The Work Function is 4.74eV.

Explanation:

The photoelectric effect is a phenomenon in which a beam of light is projected towards a metal plate and this leads to the ejection of electrons from the metal. The minimum amount of energy required for this ejection of electrons is known as the work function. When the energy of the light beam is less than the work function, then the electrons are not emitted.

The photoelectric effect is represented by the equation:

E = φ + KE  where

E = energy of the incident photons

KE = kinetic energy of photoelectrons

φ = Work function of the metal

This can also be written in terms of frequency as:

h = h₀ + \(\frac{1}{2}\) mv²

= frequency of the incident light beam

₀ = frequency of the photoelectrons

m = mass of the electron

v = velocity of the electron

h = Plank's constant 6.623 x 10⁻³⁴Js

Conversion factor: 1eV = 1.602 x 10⁻¹⁹ J

So, 1.05eV = 1.682 10⁻¹⁹ J

Using the formulas,

(6.623 x 10⁻³⁴Js)(1.40x10¹⁵ s⁻¹) = φ + 1.682 x 10⁻¹⁹ J

(9.272 x 10⁻¹⁹) - (1.682 x 10⁻¹⁹) = φ

φ = 7.590 x 10⁻¹⁹ J = 4.74 eV

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Answer:

Hello, Otaku Kun Here! >:3

Explanation:

Electromagnetic waves? This is also called light!

hope this helps!

from: Otaku Kun! ^^

Considering the definition of percent yield, the percent yield is 76%.

The percent yield is the ratio of the actual return to the theoretical return expressed as a percentage.

The percent yield is calculated as the experimental yield divided by the theoretical yield multiplied by 100%:

\(percent yield=\frac{actual yield}{theorical yield}x100\)

where the theoretical yield is the amount of product acquired through the complete conversion of all reagents in the final product, that is, it is the maximum amount of product that could be formed from the given amounts of reagents.

In this case, you know:

Replacing in the definition of percent yield:

\(percent yield=\frac{0.532 moles}{0.700 moles}x100\)

Solving:

percent yield= 76%

Finally, the percent yield is 76%.

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Answer:

Loam soil* is soil composed of equal parts sand, silt, and clay.

Explanation:

The statement that is true if the ΔEsys = -100 J is that the system looses 100J  of energy which is gained by the surroundings.

Note that the study of energy is what we call thermodynamics. We should note that according to the laws of thermodynamics, energy can not be created nor destroyed but can be converted from one form to another.

This implies that the energy that is lost by the system must be gained by the surroundings since there can never be energy that goes to waste in the system.

Recall that the universe is composed of the system and the surroundings and the energy that is lost by the system must be gained by the surroundings and vice versa. This would now be our guide in deciding which statement is right above from what we have in the question here.

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0.26L is the volume of sodium hydroxide, NaOH, needed for the reaction to occur.

A measurement of three-dimensional space is volume. Several imperial or US customary units, as well as SI-derived units (such the cubic meter and liter), are frequently used to quantify it quantitatively (such as the gallon, quart, cubic inch).

Volume and length (cubed) have a symbiotic relationship. The capacity of such a container is typically regarded to be its volume.

Molarity₁×Volume₁=Molarity₂×Volume₂

0.95 × 0.42=1.5×Volume₂

Volume₂=(0.95 × 0.42)/1.5

             =0.26L

Therefore, 0.26L is the volume of sodium hydroxide, NaOH, needed for the reaction to occur.

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Considering the definition of molality, the molality of the KCl in the solution is 6.56 moles/kg.

Molality, or molal concentration, is the amount of a substance dissolved in a given mass of solvent. It is defined as the moles of a solute per kilogram of solvent.

The Molality of a solution is determined by the expression:

molality= number of moles of solute÷ kilograms of solvent

In this case, you know:

Replacing in the definition of molality:

Molality= 1.41 moles÷ 0.215 kg

Molality= 6.56 moles/kg

The molality of the solution is 6.56 moles/kg.

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The correct answer to an enzyme is B) binds substrates in a manner that facilitates the formation of product.

Enzymes are biological catalysts that speed up chemical reactions in living organisms. They do this by binding to substrates (the reactants in a chemical reaction) and facilitating the formation of product.

This is done by lowering the activation energy required for the reaction to occur, making it easier for the reaction to take place. Enzymes do not change the position of the equilibrium of the reaction, nor do they decrease the rate of the reaction.

Enzymes also do not change the rate at which the equilibrium is achieved. Lastly, enzymes are not always proteins, as some RNA molecules can also function as enzymes. Therefore, the correct answer is B) binds substrates in a manner that facilitates the formation of product.

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When the equilibrium constant (Keq) value is large, it indicates that the forward reaction is favored and the concentration of products is significantly higher than that of the reactants at equilibrium.

In the expression for Keq, [A]a[B]b represents the concentrations of reactants and products raised to their respective stoichiometric coefficients

.For a large Keq value, it implies that the numerator of the expression, which corresponds to the concentrations of the products raised to their stoichiometric coefficients, is much larger than the denominator, which represents the concentrations of the reactants raised to their stoichiometric coefficients.

Consequently, the number representing [A]a[B]b must be relatively small compared to the number representing the products. This suggests that the concentrations of reactants [A] and [B] are considerably lower than the concentrations of products, emphasizing the strong predominance of the forward reaction at equilibrium.

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Answer:

The alpha scattering experiment done by Rutherford proved that an atom is not a bowl of positively charge atom, where the electrons were evenly spread out inside it like the plum pudding model. This is because Rutherford discovered that the atoms are mostly empty space with the aplha particles passing straight through the foil. However, a small number of the alpha particles were deflected and bounced back; meaning that the center of the atom is were the mass was mostly concentrated with a positive charge nucleus.

Hope this helps!

Answer:hydroxyl, methyl, carbonyl, carboxyl, amino, phosphate, and sulfhydryl groups.

Explanation:

A functional group can participate in specific chemical reactions. Some of the important functional groups in biological molecules include

Answer:

Supersaturated !

Explanation:

Answer:

Idon't know if this helps but I think it is a linear structure and if I am wrong I am so sorry