50.0 mL of an HCl solution with a pH of 3.5 neutralizes 200.0 mL of a Ca(OH)2 solution. What is the molarity of the Ca(OH)2 solution

Answer

moles = 5.81 mol

Explanation

Given:

Volume = 144 L

AT SATP

1 mole = 24.4651 L

Solution:

1 mole = 24.4651 L

x mole = 144 L

x = 144/24.4651

x = 5.8 mol

To determine the total mass of 1-pentanol that will dissolve in 110 grams of water to produce a saturated solution, we need to use the concept of solubility and molar mass. What is solubility? Solubility refers to the ability of a solute to dissolve in a solvent. It is measured in units of grams per 100 grams of solvent at a specific temperature.

A solution is said to be saturated if it contains the maximum amount of solute that can dissolve in the solvent at a specific temperature. The solubility of a solute depends on factors such as temperature, pressure, and the nature of the solvent and solute. What is molar mass? Molar mass refers to the mass of one mole of a substance. It is measured in units of grams per mole. The molar mass of a compound can be calculated by adding the atomic masses of the elements in the compound. Explanation: Given data: Mass of water = 110 grams To determine: Total mass of 1-pentanol that will dissolve in 110 grams of water to produce a saturated solution Solution: Firstly, let's find out the solubility of 1-pentanol in water. According to the solubility chart, the solubility of 1-pentanol in water at 25°C is 22.5 g/100 ml (or 22.5 g/110 g).So, we can say that 22.5 g of 1-pentanol can dissolve in 100 g of water to produce a saturated solution at 25°C.Now, we can use the proportionality method to calculate the total mass of 1-pentanol that will dissolve in 110 g of water.22.5 g of 1-pentanol dissolves in 100 g of water. So, x grams of 1-pentanol will dissolve in 110 g of water. x = (22.5 × 110) / 100x = 24.75 g Therefore, the total mass of 1-pentanol that will dissolve in 110 g of water to produce a saturated solution is 24.75 grams.

for more such questions on  solubility .

https://brainly.com/question/24561285

#SPJ11

The balanced equation of the reaction between hydrogen and lead (ii) oxide is given is:

PbO + H₂ ----> Pb + H₂O

A chemical equation is balanced if the number of atoms of each element on the reactants side of the equation is equal to the number of atoms of each element on the product side.

Hydrogen reacts with lead(ii) oxide to produce lead and water

The balanced equation of the reaction between hydrogen and lead (ii) oxide is given is:

PbO + H₂ ----> Pb + H₂O

Learn more about balanced equations at: https://brainly.com/question/15995710

Answer:

air

Explanation:

you breathe ok carbon dioxide

Answer: The concentration in the blood is lower

Explanation:

Answer:

Sodium chloride

Explanation:

What is the scientific term for salt?

To most people, salt refers to table salt, which is sodium chloride. Sodium chloride forms from the ionic bonding of sodium ions and chloride ions.

Ethanol, propane, and butane are all examples of fuels that contain chemical energy. This chemical energy is stored within the molecules of the fuel and can be released during a chemical reaction, such as combustion, to produce heat and/or light energy.

When ethanol, propane, or butane is burned, the chemical bonds between the atoms within the molecule are broken, releasing energy in the form of heat and light. This energy can then be harnessed for various purposes, such as heating buildings or powering vehicles. Overall, the energy content of a fuel depends on the specific molecules it contains and their chemical structures.

To know more about Ethanol click this link -

brainly.com/question/25002448

#SPJ11

Answer:

C₂H6

Explanation:

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A

A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:

A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.

B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.

D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.

In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A

For more such questions on hydrocarbon visit:

https://brainly.com/question/21281906

#SPJ8

The final answer is 11.71

The concentration of a given solution (H2NCH2CH2NH2)  is 0.314 M

pa1 = 6.848

a1 = 1.42 X \(10^{-7}\)

Pa2 = 9.928

a2 = 1.18 X \(10^{-10}\)

The equation is given as;

NH2CH2CH2NH2 + H2O ---> NH2CH2CH2NH3+ + OH-

Initial 0.314 0 0

Change -x +x +x

Equilibrium 0.314 -x x x

b1 = Kw / Ka2 = 10^-14 / 1.18 X 10^-10 = 8.47 X 10^-5 = [NH2CH2CH2NH3+][OH-] / [NH2CH2CH2NH2]

8.47 X 10^-5 = x^2 / 0.314 -x

8.47 X 10^-5 X 0.314 - 8.47 X 10^-5x = x^2

x^2 - 2.66 X 10^-5 + 8.47 X 10^-5x = 0

on solving

x = 0.0051 M = [NH2CH2CH2NH3+] = [OH-]

[NH2CH2CH2NH2] = 0.314 - 0.0051 = 0.3089 M

For the second dissociation,

NH2CH2CH2NH3+ + H2O ---> +NH3CH2CH2NH3+ + OH-

Initial 0.0051 0 0.0051

Change -x +x +x

Equilibrium 0.0051 -x x 0.0051 +x

b2 = Kw / Ka1 = 10^-14 / 1.42 X 10^-7 = 7.04 X 10^-8 = [+NH3CH2CH2NH3+] [OH-] / [+NH3CH2CH2NH2]

7.04 X 10^-8 = x (0.0051+x) / (0.0051-x)

We may ignore x in the denominator as b2 is very low

7.04 X 10^-8 = x (0.0051+x) / (0.0051)

3.59 X 10^-10 = 0.0051x + x^2

x = 7.039 X 10^-8 M

[OH-] = 0.0051 + x = 0.0051 approx

[+NH3CH2CH2NH3+] = x = 7.039 X 10^-8 M

NH2CH2CH2NH3+ = 0.0051 +x = 0.0051 M approx

pOH = --log [OH-] = -log 0.0051 = 2.29

pH = 14 - pOH = 11.71

Learn more about ph: https://brainly.com/question/12609985

#SPJ4

The moles and the grams of carbon are present in 11.85 g of aspirin C₉H₈O₄ is 0.585 mol.

The chemical formula for the compound = C₉H₈O₄

The mass of the aspirin = 11.85 g

The moles of the aspirin = mass / molar mass

The moles of the aspirin = 11.85 / 180

The moles of the aspirin = 0.065 mol

The moles of the carbon in  aspirin,  C₉H₈O₄ = 9 × 0.065

The moles of the carbon in  aspirin, C₉H₈O₄ = 0.585 mol

Thus, the moles of the carbon atom  is 0.085 in the aspirin that is C₉H₈O₄ compound .

To learn more about moles here

https://brainly.com/question/1895167

#SPJ4

Answer:

\(0.16\; \rm mol\).

Explanation:

\(\rm H_2\) and \(\rm N_2\) react to produce \(\rm NH_3\) through the following reaction:

\(\rm 2\; N_2 + 3\; H_2 \to 2\; NH_3\).

The ratio between the coefficients and \(\rm NH_3\) and \(\rm H_2\) is:

\(\displaystyle \frac{n({\rm NH_3})}{n({\rm H_2})} = \frac{2}{3}\).

This coefficient ratio would be the ratio between the quantity of \(\rm NH_3\) produced and the quantity of \(\rm H_2\) consumed in this reaction only if \(\rm H_2\!\) is a limiting reactant.  

The other reactant in this reaction, \(\rm N_2\), is in excess. Hence, \(\rm H_2\) would be the limiting reactant. Hence, the coefficient ratio could be used to find the quantity of \(\rm NH_3\) produced in this reaction.

\(\begin{aligned}n({\rm NH_3}) &= \frac{n({\rm NH_3})}{n({\rm H_2})} \cdot n({\rm H_2}) \\ &= \frac{2}{3} \times 0.24\; \rm mol \\ &= 0.16\; \rm mol \end{aligned}\).

Answer:

Fe 2 O3 .

Explanation:

The chlorine element is present in group 7.

The elements which has 7 valence electrons , is kept in group 7.

1) Chlorine (Cl):

The atomic number of chlorine is 17 and its electronic configuration is 2,8,7. It has 7 valence electrons. Hence, it will be kept in group 7.

2) Oxygen (O):

The atomic number of oxygen is 8 and its electronic configuration is 2,6.

It has 6 valence electrons. Hence, it will be kept in group 6.

3) Lithium (Li)

The atomic number of chlorine is 3 and its electronic configuration is 2,1. It has 1 valence electrons. Hence, it will be kept in group 1.

4) Calcium (Ca):

The atomic number of calcium is 20 and its electronic configuration is 2,8,8,2. It has 2 valence electrons. Hence, it will be kept in group 2.

Therefore, chlorine element will be kept in group 7.

To know more about element

https://brainly.com/question/1513999

#SPJ1

Answer:

This is not a redox reaction.

Explanation:

A redox reaction is a reaction that involves reduction and oxidation processes. The best way to identify a redox reaction. Changes in the oxidation number f the species indicates that it is a redox reaction.

Na+

Reactant side = +1, Product Side = +1; No change

Cl-

Reactant side = -1, Product Side = -1; No change

Ag+

Reactant side = +1, Product Side = +1; No change

N

Reactant side = +5, Product Side = +5; No change

O

Reactant side = -2, Product Side = -2; No change

There is no change in any of the oxidation numbers, Hence this is not a redox reaction.

A building is found to contain a radioactive gas. Thirty hours later, 60% of the initial amount of gas is still present.So, we have to calculate the half-life of the radioactive gas.

(a) Write a model for the percentage of the initial amount of the radioactive gas present after t hours. (Round all numerical values to three decimal places.)

Formula used to find the amount of radioactive gas present after t hours:

So, the remaining amount of radioactive gas is 40%.That is, r(t) = 40% = 0.40r₀and t = 30So, the formula becomes:

(b) Calculate the half-life of the radioactive gas. (Round your answer to three decimal places.)From the formula,r(t) = r₀ (1/2)^(t/T)When t = T, r(t) = 1/2 of r₀r(T) = r₀/2Divide both sides by r₀r(T)/r₀ = 1/2We have r(T)/r₀ = 0.5, and the formula becomes 0.5 = (1/2)^(T/T)0.5 = (1/2)^1T = 1Therefore, the half-life of the radioactive gas is one hour.Answer Half-life of the radioactive gas = 1 hour.

Radioactive is the ability of an unstable atomic nucleus to become stable through emission of radiation. This capability involves the process of splitting unstable atomic nuclei resulting in energy loss by emitting radiation, such as alpha particles, beta particles with neutrinos and gamma rays. What is radioactive impact? It is necessary to know, radioactive substances from nuclear radiation are compounds that are harmful to humans and other living things. The effects of nuclear radiation not only damage human DNA, but can also cause cancer. The effects of nuclear radiation can damage the atoms in the body and damage DNA.

Learn More About Radioactive at https://brainly.com/question/1236735

#SPJ11

The Lewis structure of the element have been shown in the image attached.

The valence electrons of an atom or molecule are depicted in a simplified manner by the Lewis structure, commonly referred to as the Lewis dot structure or electron dot structure. Gilbert N. Lewis, an American scientist, created it.

The valence electrons of an atom are shown in a Lewis structure as dots surrounding the element's symbol. These dots' placement reveals details about the connectivity and atom-atom bonding in a molecule.

Learn more about Lewis structure:https://brainly.com/question/29756546

#SPJ1

We can synthesize acetaminophen from benzene. Please note that the specific reagents and reaction conditions may vary depending on the desired biologically active compound.

To synthesize a biologically active compound from benzene, we need to plan a reaction sequence using appropriate reagents. Let's consider an example where we want to synthesize acetaminophen from benzene.
Step 1: Convert benzene to nitrobenzene
- Reagent: Concentrated nitric acid (HNO_3) and concentrated sulfuric acid (H_2SO_4)
- Reaction: Nitration
- Mechanism: Benzene undergoes electrophilic aromatic substitution with nitric acid, resulting in the formation of nitrobenzene.
Step 2: Reduce nitrobenzene to aniline
- Reagent: Hydrogen gas (H_2) and a reducing agent like iron (Fe) or tin (Sn)
- Reaction: Reduction
- Mechanism: Nitrobenzene is reduced to aniline by catalytic hydrogenation, using a metal catalyst such as iron or tin.
Step 3: Acetylate aniline to form acetanilide
- Reagent: Acetic anhydride (CH_3CO)_2O
- Reaction: Acetylation
- Mechanism: Aniline reacts with acetic anhydride, resulting in the formation of acetanilide.
Step 4: Convert acetanilide to acetaminophen
- Reagent: Sodium hydroxide (NaOH) and acetic anhydride (CH_3CO)_2O
- Reaction: Hydrolysis and acetylation
- Mechanism: Acetanilide undergoes hydrolysis with sodium hydroxide to form aniline. The resulting aniline is then acetylated using acetic anhydride, resulting in the formation of acetaminophen.

By following this reaction sequence, we can synthesize acetaminophen from benzene. Please note that the specific reagents and reaction conditions may vary depending on the desired biologically active compound.

Learn more about nitric acid from the following link:

https://brainly.com/question/2269846

#SPJ11

The mixtures would result in the pk, of the acid being obtained from a direct pH measurement of the resulting solution is  25 cm³ 0.1 mol dm⁻³HCl and 25 cm³ 0.1 mol dm⁻³ NaCl. Therefore, option A is correct.

The pH scale, which previously stood for "potential of hydrogen," is used to describe how acidic or basic an aqueous solution is. The pH values of acidic solutions are lower than those of basic or alkaline solutions.

The pH scale determines how acidic or basic water is. The range is 0 to 14, with 7 representing neutrality. Acidity is indicated by pH values below 7, whereas baseness is shown by pH values above 7. In reality, pH is a measurement of the proportion of free hydrogen and hydroxyl ions in water.

A solution's pH is a significant indicator of its chemical composition. The pH can affect how readily available nutrients are, how biological processes work, how bacteria behave, and how chemicals behave.

Thus, option A is correct.

To learn more about pH, follow the link;

https://brainly.com/question/15289741

#SPJ1

Did u get the answer im taking the test rn

The amount of heat gained by the water is 500 calories. Thus, option D is correct.

Given:

Mass of water (m) = 100 g

Change in temperature (ΔT) = 30°C - 25°C = 5°C

The specific heat capacity of water (c) is approximately 1 calorie/gram°C.

Now, the amount of heat gained by the water,

Q = mcΔT

Where:

Q is the heat gained or lost by the substance

m is the mass of the substance

c is the specific heat capacity of the substance

ΔT is the change in temperature

Plugging in the values into the formula:

Q = 100 × 1 × 5

Q = 500 calories

Therefore, the amount of heat gained by the water is 500 calories.

Learn more about heat, here:

https://brainly.com/question/31608647

#SPJ1

Answer: D. 4,6,4

Explanation:

The valence electron is the electron found in the outermost shell of an atom, and participates in bond formation.

For the following element, the valence electron can be noticed when we write the electronic configuration of each element.

Silicon =  1s2 2s2 2P6 3s2 3p2

Sulphur = 1s2 2s2 2P6 3s2 3p4

Germanium =  1s2 2s2 2P6 3s2 3p6 3d10 4s2 4p2

molar mass of acid = 0.0345 moles acid x molar mass of acid = 306.325 g/mol.

Molar mass is a physical property of a substance that is defined as the mass of one mole of the substance, and is expressed in grams per mole (g/mol). It is also known as molecular weight and is equal to the sum of the atomic masses of all the atoms in a molecule. The molar mass is used in many calculations when dealing with solutions and thermodynamics.

The balanced equation tells us that for every mole of acid, two moles of NaOH are needed. We can therefore use the information we have to calculate the number of moles of NaOH in the given volume:

30.8 mL x 0.515 M NaOH = 15.742 moles NaOH

We can also calculate the number of moles of acid:

0.856 g / molar mass of acid = 0.0345 moles acid

Since two moles of NaOH are needed for every mole of acid, we can divide the number of moles of NaOH by two to get the number of moles of acid: 15.742 moles NaOH / 2 = 7.871 moles acid

0.0345 moles acid x molar mass of acid = molar mass of acid

molar mass of acid = 0.0345 moles acid x molar mass of acid = 306.325 g/mol

To learn more about molar mass
https://brainly.com/question/837939
#SPJ1

Answer:

it have been already balanced

2H2 + O2 = 2H2O.

Size of an atom increases as we move down a group and from left to right across a period

Define an atom?

An atom is a unit of matter that specifically characterizes a chemical element. One or more negatively charged electrons surround the core nucleus of an atom, which is made up of all of them. One or more protons and neutrons, which are comparatively heavy particles, can be found in the positively charged nucleus.

In a group, as the atomic number rises, the atomic size expands from top to bottom. Valence electrons are located farther from the nucleus because there are more filled energy levels, which increases atomic size.

Atomic size grows as a function of period number, number of shells, and so forth. Since there are more electrons in each shell as we move from left to right in a period, the force of attraction between the nucleus and electrons, which have positive charges, is stronger, bringing the shells closer to the nucleus and shrinking the size of the atom.

To know more about atomic number use link below:

https://brainly.com/question/11353462

#SPJ1

Answer:

18.9 moles of MgCl2 = 17.834 kg of MgCl2

Explanation:

The molecular weight of MgCl is 80.0 g/mol . So, to convert the given mole amount to grams, multiply this by this number, which is constant for all compounds with a specific composition (mass fraction).

Considering the original question was in the context of chemistry, I wanted to make it seem formal and more educational too. Hopefully that worked!  

EDIT: Came up with some text around what happens inside cells that would have made it better if someone just had an issue converting units, but I doubt my answer will be accepted >.<

Answer: 8.830418848725065

Explanation:

8.830418848725065

The beta-pleated sheet is characterized by orientation of H bonds perpendicular to the molecular axis. The beta-pleated sheet is a secondary structure of proteins where the peptide chains are arranged in a zigzag manner, with adjacent chains lying in opposite directions.

These chains are held together by hydrogen bonds between the carbonyl oxygen of one chain and the amino hydrogen of an adjacent chain. These hydrogen bonds are oriented perpendicular to the molecular axis. This orientation of the hydrogen bonds in the beta-pleated sheet allows for the formation of a stable and rigid structure. The perpendicular orientation of the hydrogen bonds also creates a pleated appearance, with the peptide chains arranged in alternating upward and downward directions. The beta-pleated sheet is commonly found in proteins involved in structural roles, such as in silk and spider webs.

In beta-pleated sheets, the protein chains run alongside each other, and the hydrogen bonds form between the chains. These hydrogen bonds are perpendicular to the molecular axis, providing stability to the structure. The hydrogen bonds that form between the carbonyl oxygen atom of one amino acid residue and the amide hydrogen atom of another amino acid residue create the beta-pleated sheet structure. This arrangement causes the protein chains to fold in a way that the hydrogen bonds are perpendicular to the molecular axis.

To know more about molecular visit

https://brainly.com/question/14614762

#SPJ11

Explanation:

We have a 63.9 g sample of calcium hydroxide. First we have to convert those grams into moles. To do that we have to use the molar mass of calcium hydroxide.

Calcium hydroxide = Ca(OH)₂

molar mass of Ca = 40.08 g/mol

molar mass of O = 16.00 g/mol

molar mass of H = 1.01 g/mol

molar mass of Ca(OH)₂ = 1 * 40.08 g/mol + 2 * 16.00 g/mol + 2 * 1.01 g/mol

molar mass of Ca(OH)₂ = 74.10 g/mol

mass of Ca(OH)₂ = 63.9 g

moles of Ca(OH)₂ = 63.9 g /(74.10 g/mol)

moles of Ca(OH)₂ = 0.862 moles

In 1 molecule of Ca we have 2 atoms of O. So in 1 mol of Ca(OH)₂ we will have 2 moles of O atoms.

1 mol of Ca(OH)₂ = 2 moles of O atoms

moles of O atoms = 0.862 moles of Ca(OH)₂ * 2 moles of O /1 mol of Ca(OH)₂

moles of O atoms = 1.724 moles

One mol is similar to a dozen. When we say that we need a dozen eggs we know that we need 12 eggs. If we want a mol of eggs, we want 6.022*10^23 eggs. So one mol of something is 6.022 * 10^23 of that.

1 mol of O atoms = 6.022 * 10^23 atoms

n° of O atoms = 1.724 moles * 6.022 * 10^23 atoms/1 mol

n° of O atoms = 1.04 * 10^24 atoms

Answer: In a 63.9 g sample of Ca(OH)₂ we have 1.04 *10^24 atoms of oxygen.

Biological ketone bodies are Acetone, B-hydroxy butyrate , acetoacetate and non biological ketone bodies are Ethyl methyl ketone, 2-butanone and 2-pentanone.

Biological ketone bodies: Water soluble ketones produced by liver during the process of gluconeogenesis. Ketone bodies or simply ketones are substances produced by the liver during gluconeogenesis. This is  a process that creates glucose in times of fasting and starvation. The biological ketone bodies are  Acetone, B-hydroxy butyrate , acetoacetate.

Non-biological ketone: The ketones which are not generated by liver during the gluconeogenesis. Ketone bodies are water soluble molecules that contain the ketone groups produced from fatty acids by the liver. Ketone bodies are readily transported into tissues outside the liver where they are converted into acetyl-CoA which then enters the citric acid cycle  and is oxidized for energy.  Examples are Ethyl methyl ketone, 2-butanone and 2-pentanone.

To learn more about Gluconeogenesis please visit:

https://brainly.com/question/1425339

#SPJ4