a. What is the mass of 3.47x10^26 molecules of CuCl2?

Answer:

Explanation:

The conversion of sulphur to sulfuric acid, though it goes through several steps, is:

2 S + 3 O2 + 2 H2O → 2 H2SO4

OK, so the equation says for every 2 moles of S you will get two moles of sulfuric acid. With a little simple math, then, the ratio of S to H2SO4 is 2:2 which is the same as 1:1.

While not correct by convention, you can write the above equation as

S + 3/2 O2 + H2O → H2SO4

And then the relationship between S and H2SO4 is more clear.

There are 23 atoms of Fe in a 55.845 gram. As a result, after dividing our mass of 239 grams by the iron formula mass of 55.84 grams per bole, formol equals after calculation.

Use the millimeters to mole formula to calculate the molecular weight n, of a substance with a given mass, m, (in grams) accurately. n = m / M, where M is the substance's molar mass also known as gram-molecular weight. a substance's molecular weight expressed as a mass in grams. Example: NaCl salt weighs 58.44 grams per gram-mole. American Meteorological Society, copyright 2022.

Number of Avogadro = 6.023 × 10²³. The products of every chemical reaction are measured using the Avogadro number. 1 mole of atoms, molecules, or particles is equal to 6.023 x 1023. Calculating the number of molecules is as follows: mole number = quantity of material / mass of one mole.

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There are 23 atoms of Fe in a 55.845 gram. As a result, after dividing our mass of 239 grams by the iron formula mass of 55.84 grams per bole, formol equals after calculation.

Use the millimeters to mole formula to calculate the molecular weight n, of a substance with a given mass, m, (in grams) accurately. n = m / M, where M is the substance's molar mass also known as gram-molecular weight. a substance's molecular weight expressed as a mass in grams. Example: NaCl salt weighs 58.44 grams per gram-mole. American Meteorological Society, copyright 2022.

Number of Avogadro = 6.023 × 10²³. The products of every chemical reaction are measured using the Avogadro number. 1 mole of atoms, molecules, or particles is equal to 6.023 x 1023. Calculating the number of molecules is as follows: mole number = quantity of material / mass of one mole.

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Due to its significant concentration of hydroxide ions, LiOH is the most plausible candidate to be this base's identity.

The correct option is LiOH.

A completely ionic base like potassium hydroxide or sodium hydroxide is a strong base. Consider the chemical to be completely broken down into ionic species and hydroxide solutions of ions.

Since it entirely dissociates into sodium cation and hydroxide anion in aqueous solution, sodium hydroxide is a strong basic. One mole of sodium hydroxide will thus include one mole of sodium cation and one meter of hydroxide anion as one formula unit of sodium hydroxide comprises one sodium cation and one hydroxide anion.
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Answer:

LiOH

Explanation:

1. It's a strong base, so it will release OH. Therefore, first we find the pOH.

pOH=14-pH

pOH=14-12=2

2.Find the concentration of OH

pOH=-log(OH)

2=-log(OH)

OH=10^-2

3.Find moles (make sure to change mL to L)

.083L(10^-2 mol/L)=.00083mol

4.Find molar mass

.02g/(.00083mol)= 24.1g

5.Find which option has a molar mass of 24.1g which is LiOH

To form one formula unit of Al2O3, a total of 12 electrons (6 from aluminum and 6 from oxygen) must be transferred.

The compound Al2O3, commonly known as aluminum oxide, is formed when two aluminum atoms and three oxygen atoms bond. To determine the number of total electrons that must be transferred to form one formula unit of Al2O3, we first need to find the number of electrons that are present in one formula unit of Al2O3.

Aluminum has an atomic number of 13, which means it has 13 protons and 13 electrons in a neutral atom. Each aluminum atom in Al2O3 contributes 3 electrons, and since there are two aluminum atoms in one formula unit of Al2O3, the total number of electrons contributed by aluminum atoms is 6.

Oxygen has an atomic number of 8, which means it has 8 protons and 8 electrons in a neutral atom. Each oxygen atom in Al2O3 contributes 2 electrons, and since there are three oxygen atoms in one formula unit of Al2O3, the total number of electrons contributed by oxygen atoms is 6.

Therefore, to form one formula unit of Al2O3, a total of 12 electrons (6 from aluminum and 6 from oxygen) must be transferred.

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If an electron is released during radioactive decay, the type of decay that has taken place is beta decay.

In beta decay, a neutron within the nucleus is converted into a proton, releasing an electron (also called a beta particle) in the process.

In alpha decay an alpha particle is emitted from the atomic nucleus and a new atomic nucleus is formed. So, no release of electron is there.

In gamma decay the unstable nuclei release excess energy by continuous electromagnetic process. This does not involve release of electron.

The electromagnetic decay also do not involve the release of an electron.

Thus option b is the correct answer.

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Answer:

(9.03x10^-14)x(8.455x10^20)=7.634865x10^7

(5.2x10^11)/(2.10x10^-4)=2.476190x10^15

(7.67x10^12)x(3.8x10^15)=29146000000000000000000000000

(9.237x10^20)/(4.5x10^-6)=2.0526x10^26

Explanation:

Answer:

true

Explanation:

im smart

Answer:

true, oxidation number for Cl2 = 0

Answer:

D

Explanation:

Sweat glands remove waste

The correct association that lies between the structure and one of its functions is option D Sweat glands remove waste.

The sweat represents the fluid that comprises of mainly of water also there is much dissolved solid wastage that should be excreted via the sweat glands. It eliminates the excess water and salts also it served the function of colling the body at the time of thermoregulation.

Therefore, the option D is correct.

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Answer:

The correct answer is B.

The Henderson-Hasselbalch equation can be used to calculate the pH of a buffer solution:

pH = pKa + log([base]/[acid])

In this case, the pKa of ammonia is 9.25, the concentration of the base is 0.010 M, and the concentration of the acid is 0.050 M. Therefore, the pH of the buffer solution is:

pH = 9.25 + log(0.010/0.050) = 8.55

Explanation:

Answer:

Iodine

Explanation:

Hope this helps. Think about me, when giving out brainiest.

Answer:

Copper Sulphate

Explanation:

Cu (Copper)

SO4 (Sulphate)

The transition state is only present when the reaction's potential energy is at its greatest. It is quite unstable for the species in the transition state.

The term is derived from the Latin word "transire," which meaning to cross. It frequently describes the action rather than the outcome. Thus, "transitioning" is the process of changing, of moving from one set of traits or circumstances to another.

An excellent transition sentence might contain a word or phrase like although, despite this/that, in comparison, or yet if you needed to convey a point that contradicted your prior assertion.

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Answer:

d.They do not want to live near towers that transfer electricity

Explanation:

Free radicals are highly reactive molecules or atoms that have unpaired electrons in their outer shells.
Negative health consequences of a high amount of free radicals in the system include, Oxidative Stress, Inflammation, Cellular Damage.
Antioxidants are substances that can neutralize or counteract the damaging effects of free radicals.


Free radicals are highly reactive molecules or atoms that have unpaired electrons in their outer shells. They are formed as natural byproducts of various biological processes in the body, such as metabolism, immune response, and environmental factors like pollution, radiation, or smoking. Free radicals are unstable and seek to stabilize themselves by oxidizing other molecules in the body, leading to a chain reaction of damage to cells, proteins, and DNA.

Negative health consequences of a high amount of free radicals in the system include:

Oxidative Stress: Excessive free radicals can cause oxidative stress, which is an imbalance between the production of free radicals and the body's antioxidant defenses. This can result in damage to cellular components and contribute to the development of chronic diseases, including cancer, cardiovascular diseases, neurodegenerative disorders, and aging.

Inflammation: Free radicals can trigger and perpetuate inflammation in the body. Chronic inflammation is associated with various health conditions, including arthritis, asthma, diabetes, and autoimmune disorders.

Cellular Damage: Free radicals can damage cell membranes, proteins, and DNA, leading to mutations, cell dysfunction, and impaired cellular processes. This can disrupt normal cell function and contribute to the development of diseases.

Antioxidants are substances that can neutralize or counteract the damaging effects of free radicals. They help inhibit or reduce the oxidation of other molecules by donating an electron to stabilize the free radicals without becoming free radicals themselves. Antioxidants can be naturally occurring compounds found in fruits, vegetables, whole grains, nuts, and seeds, as well as synthetic substances. Some common antioxidants include vitamins C and E, beta-carotene, selenium, and various phytochemicals. Consuming a diet rich in antioxidants or supplementing with antioxidants can help protect against oxidative stress and mitigate the negative health consequences associated with high levels of free radicals.


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The group 1 element; the alkali metals which are lithium, sodium and potassium have a pattern of reactivity such that they produce alkali when they dissolve in water.

The chemical equation is given below:

Na(s) + H2O(l) --- NaOH(aq) + H2(g)

K(s) + H2O(l) --- KOH(aq) + H2(g)

These are the metals which belong to the group 1 of the periodic table. They are called alkali metals because when they react with water, they produce soluble hydroxide known as alkali. For this reason, they are referred to as alkali metals.

So therefore, the group 1 element; the alkali metals which are lithium, sodium and potassium have a pattern of reactivity such that they produce alkali when they dissolve in water.

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Answer:

1.477 molecules

Explanation:

The oxidation number of the sulfur atom (S) in molecule D (CSO₂) is 0.

Let's assume the formula of molecule D is CSO₂.

The oxidation number of carbon (C) is +4. Oxygen (O) has an oxidation number of -2, and since there are two oxygen atoms, the total oxidation number for oxygen is -4.

The sum of the oxidation numbers must equal the charge on the molecule, which is zero since it is a neutral molecule.

So, +4 (from C) + (-4) (from O) + x (from S) = 0

Simplifying the equation, we have:

4 - 4 + x = 0

x = 0

Oxidation number, also known as oxidation state, is a concept used in chemistry to describe the charge that an atom would have in a molecule or compound. It is a way to keep track of the distribution of electrons during chemical reactions. The oxidation number of an atom is determined by assigning hypothetical charges to the atoms based on certain rules. These rules take into account the electronegativity and electron transfer patterns in the compound.

In general, the oxidation number of an atom can be positive, negative, or zero. Positive oxidation numbers indicate that an atom has lost electrons, while negative oxidation numbers indicate that an atom has gained electrons. An oxidation number of zero indicates that the atom has neither gained nor lost electrons.

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Answer:

either bacterial cells or plant cells but I think bacterial

Explanation:

from google: Bacteria are single celled microbes. Bacteria are classified into five groups according to their basic shapes: spherical (cocci), rod (bacilli), spiral (spirilla), comma (vibrios) or corkscrew (spirochaetes). ... They can exist as single cells, in pairs, chains or clusters.

- cannot be human or mouse cells as both are animals and animal cells do not have cell walls

To determine the number of moles of hydrogen needed to crack one mole of the long saturated hydrocarbon chain (C40H82), we can analyze the reactants and products involved in the cracking reaction.

The cracking reaction is given as: C40H82 -> 3 C8H18 + n C2H6. From the equation, we can see that one mole of the long hydrocarbon chain (C40H82) produces three moles of octane (C8H18) and n moles of ethane (C2H6). Since the cracking process involves breaking the carbon-carbon bonds and forming new carbon-hydrogen bonds, the number of hydrogen atoms in the products should remain the same as in the reactant.

The long hydrocarbon chain (C40H82) contains 82 hydrogen atoms, and the products, 3 moles of octane (C8H18), contain (3 moles) * (18 hydrogen atoms/mole) = 54 hydrogen atoms. Therefore, the number of moles of hydrogen needed for cracking one mole of the long hydrocarbon chain can be calculated as: Number of moles of hydrogen = 82 - 54 = 28 moles. Hence, 28 moles of hydrogen are required to crack one mole of the long saturated hydrocarbon chain (C40H82).

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Answer:

a. it is impossible to anticipate the pH profile of an acid and base without performing the experiment in the lab.

Explanation:

Answer:

are washed into oceans, adding harmful substances.

Explanation:

I already did it

Answer:

its 1 and 2

Explanation:

because the 3rd one is alrdy in the ground

Answer: The molarity of the K2CO3 solution is 0.625 M.

Explanation: To find the molarity of a solution, you need to know the moles of solute and the volume of the solution in liters. Here's how to solve the problem:

Calculate the moles of K2CO3 using its given mass and molar mass:

moles = mass / molar mass = 93.1 g / 136.21 g/mol = 0.682 mol

Calculate the volume of the solution in liters:

volume = 1.09 L

Calculate the molarity of the solution using the moles and volume:

molarity = moles / volume = 0.682 mol / 1.09 L = 0.625 M

Option B is supported by the mass of 2.75 104 moles of NaOH, which is 1.1 102 g.

To find the mass of \(2.75 x 10^-^4\) moles of NaOH, we need to use the formula:
mass = moles x molar mass

The molar mass of \(NaOH\) is 40.00 g/mol (22.99 g/mol for Na + 16.00 g/mol for O + 1.01 g/mol for H).
So, the mass of \(NaOH\) is:

mass =\(2.75 x 10^-^4\) mol x 40.00 g/mol
mass = 0.011 g

Converting this to scientific notation, we get:
mass \(= 1.1 x 10^-^2 g\)

Therefore, the answer is option b)\(1.10 x 10^-^2 g NaOH.\)

To find the mass of \(NaOH\), we need to use the formula:
mass = moles × molar mass

The molar mass of \(NaOH\) (sodium hydroxide) is approximately 40 g/mol (23 g/mol for Na, 16 g/mol for O, and 1 g/mol for H).

Given, moles of \(NaOH\) = 2.75 × 10⁻⁴
Now, let's calculate the mass:
mass = (2.75 × 10⁻⁴ moles) × (40 g/mol) = 1.1 × 10⁻² g

So, the mass of 2.75 × 10⁻⁴ moles of \(NaOH\) is 1.1 × 10⁻² g, which corresponds to option B.

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2. The new pressure, given the data is 3.0 atm

3. The new temperature in K is 361 K

4. The new temperature in K is 348 K

The new pressure of the gas can be obtained by using the combined gas equation as illustrated below:

P₁V₁ / T₁ = P₂V₂ / T₂

(3.4 × 1500) / 298 = (P₂ × 2000) / 348

Cross multiply

P₂ × 2000 × 298 = 3.4 × 1500 × 348

Divide both sides by 2000 × 298

P₂ = (3.4 × 1500 × 348) / (2000 × 298)

P₂ = 3.0 atm

The new temperature of the gas can be obtained by using the combined gas equation as illustrated below:

P₁V₁ / T₁ = P₂V₂ / T₂

(167 × 450) / 295 = (230 × 400) / T₂

Cross multiply

T₂ × 167 × 450 = 295 × 230 × 400

Divide both sides by 167 × 450

T₂ = (295 × 230 × 400) / (167 × 450)

T₂ = 361 K

The new temperature of the gas can be obtained by using the combined gas equation as illustrated below:

P₁V₁ / T₁ = P₂V₂ / T₂

(9.2 × 3.6) / 298 = (7.3 × 5.3) / T₂

Cross multiply

T₂ × 9.2 × 3.6 = 298 × 7.3 × 5.3

Divide both sides by 9.2 × 3.6

T₂ = (298 × 7.3 × 5.3) / (9.2 × 3.6)

T₂ = 348 K

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Answer:

A mineral has to be naturally occurring, inorganic, solid, have a crystal structure, and have a definite chemical composition.

Explanation:

The pH of the solution after adding 19.68 mL of 0.1000 M NaOH(aq) is 3.7525.

Volume of C₃H₇COOH(aq) = 20.00 mL

Concentration of C₃H₇COOH(aq) = 0.1000 M

Volume of NaOH(aq) added = 19.68 mL

Concentration of NaOH(aq) = 0.1000 M

Ka of butanoic acid = 1.52 × 10⁻⁵

To find the pH during the titration, we need to determine the concentration of H₃O⁺ ions in the solution.

First, calculate the initial moles of butanoic acid:

Moles of C₃H₇COOH = Volume × Concentration = (20.00 mL × 0.1000 M) / 1000 = 0.00200 moles

According to the balanced chemical equation, 1 mole of NaOH reacts with 1 mole of C₃H₇COOH. Therefore, the moles of NaOH added are:

Moles of NaOH = Volume × Concentration = (19.68 mL × 0.1000 M) / 1000 = 0.001968 moles

The moles of butanoic acid left after reacting with NaOH can be calculated as:

Moles of C₃H₇COOH left = Initial moles of C₃H₇COOH - Moles of NaOH = 0.00200 moles - 0.001968 moles = 0.000032 moles

The total volume of the solution after the addition of NaOH is (20.00 mL + 19.68 mL) = 39.68 mL or 0.03968 L.

Now, calculate the new concentration of butanoic acid:

Concentration of C₃H₇COOH = Moles of C₃H₇COOH left / Volume = 0.000032 moles / 0.03968 L = 0.0008065 M

The concentration of sodium butanoate (NaC₃H₇COO) formed is also 0.0008065 M, as the balanced equation shows a 1:1 mole ratio between C₃H₇COOH and NaC₃H₇COO.

Next, use the expression for the ionization of butanoic acid to calculate the pH:

C₃H₇COOH(aq) + H₂O(l) ⇌ C₃H₇COO⁻(aq) + H₃O⁺(aq)

Ka = [C₃H₇COO⁻][H₃O⁺] / [C₃H₇COOH]

Let [C₃H₇COO⁻] = [H₃O⁺] = x

[C₃H₇COOH] = 0.0008065 M - x

Substituting these values into the Ka expression, we get:

Ka = [x * x] / [0.0008065 - x]

Solving for x, the concentration of H₃O⁺ ions, using the given Ka value:

1.52 × 10⁻⁵ = [x * x] / [0.0008065 - x]

Solving the equation, we find:

[H₃O⁺] = x = 1.77 × 10⁻⁴ M

Finally, calculate the pH:

pH = -log[H₃O⁺]

pH = -log(1.77 × 10⁻⁴)

pH = 3.7525

Therefore, the pH of the solution after adding 19.68 mL of 0.1000 M NaOH(aq) is 3.7525.

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The correct statement concerning the oxidation of aldehydes and ketones is Aldehydes readily undergo oxidation and ketones are resistant to oxidation.

So, the correct answer is A.

Aldehydes possess a hydrogen atom on their carbonyl group, making them more susceptible to oxidation. This process leads to the formation of carboxylic acids. In contrast, ketones have two alkyl groups attached to the carbonyl carbon, making them less prone to oxidation under normal conditions.

Oxidation of ketones typically requires harsher conditions and results in cleavage of the carbon-carbon bond, forming smaller carbonyl compounds. Therefore, aldehydes are more easily oxidized, while ketones display resistance to oxidation.

Hence, the answer of the question is A.

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Answer:

Acidity and alkalinity are measured using a pH scale, for which 7.0 is neutral. The lower a substance's pH (less than 7), the more acidic it is; the higher a substance's pH (greater than 7), the more alkaline it is. Average rain has a pH of about 5.6; it is slightly acidic because carbon dioxide (CO2) dissolves into it, forming weak carbonic acid. Acid rain usually has a pH between 4.2 and 4.4. The most common nitrogen-related compounds emitted into the air by human activities are nitrogen oxides. Ammonia is another nitrogen compound emitted into the atmosphere, primarily from agricultural activities and fossil fuels. Most of the nitrogen oxides released in the U.S. due to human activity are from the burning of fossil fuels associated with transportation and industry.  

Explanation: