1) In a titration, 50.00 mL of 0.916 M H2SO4 were added. How many moles of H+ were delivered?
2) A student carried out a titration using H2SO4 and KOH. The balanced equation for the reaction is:
H2SO4 (aq) + 2 KOH (aq) --> K2SO4 (aq) + 2 H2O (l)
The student determined that 0.229 mol KOH were used in the reaction. How many moles of H2SO4 would have been needed to react with all of this KOH?

The chemical formula for the compound is AB₂C₄.

A chemical formula is define as a formula which identifies each constituent element by its chemical symbols, and indicate the proportionate number of atom of each elements.

Chemical formula is can also be called as empirical formula.

Example - Chemical formula for water is H₂O.

Chemical formula provides chemical composition of a compound.

Chemical formula of a compound is crucial when it represents a chemical equation.

Thus, the chemical formula for the compound is AB₂C₄.

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Answer:

Carbon dioxide into energy

Explanation:

Plants are autotrophs and prepare their own food through the process of photosynthesis. During the process of photosynthesis, plants utilizes, carbon dioxide and water in the presence of sunlight and produce energy and oxygen.

Plants cell during photosynthesis, uses carbon dioxide and transform it into energy in the form of glucose and releases oxygen.

Hence, the correct answer is "Carbon dioxide into energy".

The number of atoms corresponding to the molecule is in the lower part of the atoms, when there is no number it will mean that the atom is present only once.

So, we have that in one molecule of NH4 there will be:

Outside the parentheses we see that there is a number two (NH4)2, this means that there are two molecules of NH4.

So we have:

And we have outside the molecule an atom of S

So, we have in total:

The answer will be the last one, 2-N, 8-H, 1-S

The electron transitions representing absorption of energy are:

(a) n = 2 to n = 4

(d) n = 3 to n = 4

and those which represents emissions of energy are:

(b) n = 3 to n = 1

(c) n = 5 to n = 2

An electron emits energy when it jumps from a higher energy level to a lower energy level transitions.

An electron absorbs energy to jump from a lower energy level to a higher energy level transitions.

(a) n = 2 to n = 4

Here, the initial level (2) is lower than the final level (4).

Hence energy is absorbed.

(b) n = 3 to n = 1

Here, the initial level (3) is higher than the final level (1).

Hence energy is released.

(c) n = 5 to n = 2

Here, the initial level (5) is higher than the final level (2).

Hence energy is released.

(d) n = 3 to n = 4

Here, the initial level (3) is lower than the final level (4).

Hence energy is absorbed.

The question is incomplete. Find the complete question here:

Which of these electron transitions correspond to absorption of energy and which to emission?

(a) n = 2 to n = 4

(b) n = 3 to n = 1

(c) n = 5 to n = 2

(d) n = 3 to n = 4

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Orbital is the region is space where there is a high probability of finding an electron in an atom.

The orbitals farthest from the nucleus in the under listed atoms are the valence orbitals.

Ca - s orbital

Tc - s orbital

Br - p orbital

Cf - s orbital

V - s orbital

Fr - s orbital

Np - s orbital

Rn - p orbital

It must be noted that when the d orbitals are filled, they become lower in energy than the 4s orbitals. the empty 3d orbitals are higher in energy than 4s but the filled 3d level is lower in energy than the 4s level.

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Water 3.0 deals mainly with sewage treatment. The primary aim of this project is to reduce the harmful impacts of chemical pollutants from industrial and agricultural activities on natural water resources.

Currently, used wastewater treatment technologies can break down some of the chemicals in wastewater but not all of them. Chemicals that are not broken down are referred to as persistent organic pollutants. These chemicals persist in the environment for long periods, and they can cause severe damage to aquatic life and human health.
Currently, the primary challenge facing water treatment technologies is the removal of persistent organic pollutants such as pesticides, pharmaceuticals, and endocrine-disrupting chemicals from wastewater.

These pollutants are generally water-soluble and resist microbial degradation, making them hard to remove from wastewater using current water treatment technologies. For example, conventional activated sludge treatment used in wastewater treatment plants does not remove some persistent organic pollutants from wastewater.
Failure to remove these pollutants from wastewater can have significant environmental and health impacts.

For example, pharmaceutical chemicals can cause antibiotic resistance, while endocrine-disrupting chemicals can cause birth defects, cancer, and other health problems.

Therefore, there is a need to improve wastewater treatment technologies to remove persistent organic pollutants from wastewater.
In conclusion, wastewater treatment technologies can break down some chemicals but not all. Chemicals that are not broken down are persistent organic pollutants and pose a significant risk to the environment and human health. Therefore, it is important to develop wastewater treatment technologies that can remove these pollutants from wastewater.

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Some people practice brining their turkey. This means they let it soak in a solution overnight. The solution diffuses into the turkey. This means that the turkey is placed into a hypertonic solution.

A hypotonic solution is described as a solution that has lower osmotic pressure than another solution to which it is compared.

The concept of tonicity helps us understand that the saltwater we use to brine the turkey is typically considered hypertonic solution because it has a greater concentration of solutes than the liquid found inside the cells.

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The moles of oxygen required to completely react with 1 moles of acetylene is 2.5 mol.

The balanced chemical equation for the reaction is given as:

\(\rm 2\;C_2H_2\;+\;5\;O_2\;\rightarrow\;4\;CO_2\;+\;2\;H_2O\)

The stoichiometric coefficient in the balanced chemical equation gives the information for the moles of products and reactants in the reaction.

From the given balanced chemical equation, for reacting with 1 mole of acetylene, 5 moles of oxygen is required.

The moles of oxygen required to react with 1 mole of acetylene are:

\(\rm 2\;mol\;C_2H_2=5\;mol\;O_2\\\\1\;mol\;C_2H_2=\dfrac{5}{2}\;\times\;1\;mol\;O_2\\\\ 1\;mol\;C_2H_2=2.5\;mol\;O_2\)

The moles of oxygen required to completely react with 1 moles of acetylene is 2.5 mol.

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The ability of an atom in a covalent bond to attract shared electrons to itself is best quantified by its electronegativity value.

Electronegativity is a measure of the tendency of an atom to attract electrons to itself when it forms a chemical bond with another atom. The electronegativity values of atoms are typically determined experimentally and are assigned on a scale known as the Pauling scale. The higher the electronegativity value of an atom, the more strongly it attracts shared electrons towards itself. Electronegativity values can be used to predict the polarity of a covalent bond and the distribution of electrons in a molecule.

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Methane produced in the late 20th and early 21st centuries can be distinguished from ancient sources of methane by using isotopic analysis.

Methane is a simple hydrocarbon with the chemical formula CH4. It is a colorless, odorless gas that is the primary component of natural gas, which is used as a fuel source for heating, cooking, and electricity generation. Methane is also a potent greenhouse gas that contributes to global warming and climate change when released into the atmosphere.

Methane is formed through both natural and human activities. Natural sources of methane include microbial decomposition of organic matter in wetlands, oceans, and other environments. Human activities that produce methane include agriculture, livestock farming, coal mining, oil and gas production, and landfills.

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Explanation:

To change from m to cm, divide by 100

\( \frac{98.723}{100} \\ = \: 0.98723cm\)

Answer: As ice melts into water, kinetic energy is being added to the particles. This causes them to be 'excited' and they break the bonds that hold them together as a solid, resulting in a change of state: solid -> liquid.

Explanation:

If you were to spill a little benzoic acid as you mix it with the lauric acid, the calculated molecular weight would be too high.

This is because the amount of benzoic acid would be greater than the amount of lauric acid, and the molecular weight of benzoic acid is higher than the molecular weight of lauric acid.

The molecular weight of a substance is the sum of the atomic weights of the atoms that make up the substance. Benzoic acid has a molecular weight of 122.12 g/mol, while lauric acid has a molecular weight of 200.32 g/mol.

If you were to spill a little benzoic acid, the total amount of benzoic acid and lauric acid would be greater than the amount of lauric acid that would be present if no benzoic acid were spilled.

This would cause the calculated molecular weight to be higher than the actual molecular weight of lauric acid.

To avoid this, it is important to be careful when mixing benzoic acid and lauric acid. It is also important to use a balance that is accurate to at least 0.01 g to measure the amounts of benzoic acid and lauric acid.

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In this experiment, a mixture of 12.0 g was separated into its component parts.

Chemical components are substances that are composed of atoms and molecules and are essential for the functioning of living organisms. They are made up of elements and compounds, which are combinations of atoms. Examples of chemical components include proteins, carbohydrates, lipids, nucleic acids, and vitamins.

After the separation, the mixture yielded 4.07 g of NaCl, 4.32 g of SiO2, and 3.23 g of NH4Cl. This experiment is a physical process, not a chemical one. Through this separation, the components of the mixture were found to be NaCl, SiO2, and NH4Cl.

NaCl, also known as table salt, is primarily composed of sodium and chlorine ions. It is a very soluble compound, which is why it is used as a preservative and flavor enhancer in many foods. SiO2, or silicon dioxide, is a compound found in many rocks and minerals. It is an important component of many components in everyday life, such as glass, concrete, and sand. Lastly, NH4Cl, or ammonium chloride, is a salt composed of an ammonium ion and a chloride ion. It is an important component of fertilizers, as it helps to increase the acidity of the soil.
These components, while they were present in the mixture, were not necessarily reacted together. Thus, the separation of the mixture into its components is a physical process, as it does not involve any chemical reactions. The experiment, however, is important because it is one of the ways to identify and quantify the components of a mixture.

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Answer:

an element

answer is an element

hope it helps

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Answer:

15) the mass of an electron is really small and uncountable while that of proton is bigger and countable

Answer:

Option B. 176g/mol

Explanation:

We'll begin by writing the chemical formula for hexasodium difluoride. This is given below:

Hexasodium means 6 sodium atom

Difluoride means 2 fluorine atom.

Therefore, the formula for hexasodium difluoride is Na6F2.

The relative formula mass of a compound is obtained by simply adding the atomic masses of the elements present in the compound.

Thus, the relative formula mass of hexasodium difluoride, Na6F2 can be obtained as follow:

Molar mass of Na = 23g/mol

Molar mass of F = 19g/mol

Relative formula mass Na6F2 = (23x6) + (19x2)

= 138 + 38

= 176g/mol

Therefore, the relative formula mass of hexasodium difluoride, Na6F2 is 176g/mol

Answer:

B. 176 g/mol

Explanation:

chemistry ed tell

The masses of dimethylamine and dimethylammonium chloride do you need to prepare 8. 00 l of pH = 12. 00 buffer is 1448 gm.

A buffer is an aqueous solution that can resist significant changes in pH levels upon the addition of small amount of acid or alkali.

dimethylamine (CH₃)₂NH and dimethylammonium chloride (CH₃)₂NH * HCl are mixed to prepare a buffer solution

The concentration of the components is given as 0.5M , Volume = 8L

no. of moles = CV = 0.5 * 8 =4 moles

4 moles of dimethylamine = mass/ Molecular weight

Molecular weight of dimethylamine = 45 gm

Therefore the mass of dimethylamine required = 45 * 4 = 180 gm

4 moles of dimethylammonium chloride = 362 gm

Therefore the mass of dimethylammonium chloride required = 362*4 = 1448 gm

Thus the masses of dimethylamine and dimethylammonium chloride do you need to prepare 8. 00 l of pH = 12. 00 buffer is 1448 gm.

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Explanation:

I Would Determine Mass,Volume And Weight

After drawing the Lewis dot structure of HCN, the incorrect statement from the options given is D, which says that the C-H bond is a single bond.

After drawing the Lewis dot structure of HCN, we can determine the bonding and nonbonding electron pairs around each atom in the molecule. In the Lewis dot structure of HCN, the carbon atom is in the center and is bonded to both the nitrogen and hydrogen atoms. The nitrogen atom has one lone pair of electrons, and there are no lone pairs on either the carbon or hydrogen atoms.


A. The C-N bond is a double bond. This statement is correct. In the Lewis dot structure of HCN, there are four valence electrons on the carbon atom and five valence electrons on the nitrogen atom. To form a stable molecule, the carbon and nitrogen atoms share two pairs of electrons, forming a double bond.

B. There is a lone pair of electrons on N. This statement is correct. As mentioned earlier, the nitrogen atom has one lone pair of electrons in the Lewis dot structure of HCN.

C. There are no lone pairs on H. This statement is correct. Hydrogen atoms only have one valence electron, which they share with another atom to form a bond. Therefore, there are no lone pairs on the hydrogen atom in HCN.

D. The C-H bond is a single bond. This statement is incorrect. In the Lewis dot structure of HCN, the carbon atom is bonded to the hydrogen atom by a triple bond, which consists of one sigma bond and two pi bonds.

E. There are no lone pairs on C. This statement is correct. In the Lewis dot structure of HCN, there are no lone pairs on the carbon atom.

Therefore, the incorrect statement from the options given is D, which says that the C-H bond is a single bond.

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A measure of how much solute can dissolve in a given amount of solvent. A substance's solubility in water is the greatest amount of that material that can dissolve in 100 grams of water at a specific temperature. The solubility of BaCrO₄ is 2.787.

The equilibrium constant for a solid material dissolving in an aqueous solution is the solubility product constant, Ksp. It stands for the degree of solute dissolution in solution. A substance's Ksp value increases with how soluble it is.

Ksp = [Ba²⁺][CrO₄²⁻]

Ksp = S × S

S² = Ksp

\(S=(K_{sp} )^{1/2}\)

\(S=(1.2 * 10^{-10} )^{1/2}\)

\(S=1.10*10^{-5} mol/L\)

[Ba²⁺] = 1.10 × 10⁻⁵ mol/L

[CrO₄²⁻] = 1.10 × 10⁻⁵ mol/L

ppm = Molarity × molecular mass × 1000

ppm = 1.10 × 10⁻⁵ × 253.37 × 1000

ppm = 2.787

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Your question is incomplete, the complete question is:

what is the solubility of barium chromate in parts per million if the value of Ksp is 1.2×10⁻¹⁰.

Answer:

The electronic configuration of the element with Atomic number 19 is 2,8,8,1. The element is potassium. It is an alkali metal with one valence electron.

The molar concentration of Al(OH)₃ in the solution is 1.61 M.

we need to calculate the number of moles of Al(OH)3 in the solution:

Number of moles of Al(OH)₃ = mass of Al(OH)3 / molar mass of Al(OH)3

Molar mass of Al(OH)₃ = (1 x atomic mass of Al) + (3 x atomic mass of O) + (3 x atomic mass of H)

Molar mass of Al(OH)₃ = (1 x 26.98 g/mol) + (3 x 16.00 g/mol) + (3 x 1.01 g/mol) = 78.00 g/mol

Number of moles of Al(OH)₃ = 62.7 g / 78.00 g/mol = 0.804 moles

Next, we need to calculate the volume of the solution in liters:

Volume of solution = 500.0 mL = 500.0 mL x (1 L/1000 mL) = 0.500 L

Finally, we can calculate the molar concentration of Al(OH)₃

Molarity = moles of solute/volume of solution in liters

Molarity = 0.804 moles / 0.500 L = 1.61 M

Therefore, the molar concentration of Al(OH)₃ in the solution is 1.61 M.

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Answer:

f

Explanation:

The ratio of 32 to 16 is:

Hence, 2:1 will be the ratio.

Hoped this helped.

\(BrainiacUser1357\)

The equation related to reaction between Sulfur dioxide and oxygen to produce sulfur trioxide is 2SO\(_2\)(g) + O\(_2\)(g) \(\rightarrow\) 2SO\(_3\) (g).  SO\(_2\)  is limiting reagent.

The reactant that controls how much of the products are generated inside a chemical reaction is known as the limiting reagent. Since some of the other reactants remain that after limiting reagent has been used fully, it is occasionally discovered that they are in excess in the reactions. The theoretical yield is the most product that can theoretically be produced.

2SO\(_2\)(g) + O\(_2\)(g) \(\rightarrow\) 2SO\(_3\) (g)

moles of SO\(_2\) =20.0 g / 64.07

                      =0.312moles

moles of O\(_2\)= 15.6 g/32

                   =0.487moles

On dividing the moles by stoichiometry, out of  O\(_2\) and SO\(_2\), SO\(_2\)  is limiting reagent.

Therefore,  the equation related to reaction between Sulfur dioxide and oxygen to produce sulfur trioxide is 2SO\(_2\)(g) + O\(_2\)(g) \(\rightarrow\) 2SO\(_3\) (g).  SO\(_2\)  is limiting reagent.

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The energy, in kj, is transferred between the system and surroundings when 250. 0 g of potassium fluoride is dissolved into water, the molecular mass of kf is 58. 10 g/mol is 745 kJ per second  thermodynamics

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