jung is completing a weak acid-strong base titration. at the 1/4 equivalence point his ph is 2.28, what is the pka of his weak acid?

2KClO3 --> 2KCl + 3O2

3 moles of oxygen are produced when 2 mol of potassium chlorate (KClO3) decompose.

Answer:

The answer is 3

Explanation:

I did the test on Edge

Answer:

10 L

Explanation:

The equation of the reaction is;

2BaO2 = 2BaO + O2

Number of moles of  BaO2 = 114.7 g/169.33 g/mol = 0.677 moles

From the reaction equation;

2 moles of BaO2 yields 1 moles of O2

0.677 moles of BaO2 yields 0.677 * 1/2 = 0.3385 moles of oxygen

Hence;

PV=nRT

V = ?

P = 127400 Pa or 1.257 atm

T = 455 K

n = 0.3385 moles

R = 0.082 atmLmol-1K-1

V = nRT/P

V = 0.3385 * 0.082 * 455/1.257

V= 10 L

Answer:

measurements are important to do calculations to get correct results and without them scientists cannot form theories

We have the total of 12 valence electrons for the H₂CO Lewis structure.  starting by putting the Carbon in  middle, and then the Hydrogens always go on  outside, and then the Oxygen will go upwards. . We have 12 valence electrons.

We'll put 2 between atoms to form the chemical bonds and then on  the outside to fill the octet of the Oxygen. So we just have the 2, 4, 6, 8, 10, and 12 electrons. At this point, everything has the full outer shell except the Carbon, which only has  six valence electrons. We can take these 2 valence electrons to from Oxygen and then  the share them to form the double bond. Now the Oxygen has 8 valence electrons, still has 8, but  Carbon has 8.  Thus ,the Hydrogens, it only need 2 for a full outer shell, so they're fine.

So in  Lewis structure for H₂CO, it has completed the octets for each of the atoms, and where only 12 valence electrons are used.

To know more about lewis structure, please refer:

https://brainly.com/question/20300458

#SPJ4

Answer:

0.0624 mol

Explanation:

Trust me i know :)

The statement, that describes moles of CS2 are formed in the reaction is "0.0624 mol."

In a chemical reaction, one or several substances also referred to as reactants are changed into one or several additional compounds are recognized as products.

A mole is the proportion of chemical substance which comprises the number of entities such as atoms, molecules, ions etc. In order to determine the moles, divide the given mass of the substance value by its molar mass to convert grams into moles.

Gram to mole conversion factor,

\(= Grams\;*\;\frac{1\;mol}{gram}= 8.00\;g\;*\;\frac{1\;mol}{64.066 g}\\= 0.1248\;mol\)

The balanced chemical equation comes out to be, 5C + 2SO → CS₂ + 4CO

Using the above equation, moles of carbon disulfide is calculated as follows,

\(= 0.1248\;mol\;of\;SO2\;*\;\frac{1\;mol\;CS2}{2\;mol\;SO2} \\\\= 0.0624\;mol\;CS2\)

Hence the correct answer is 0.0624 mol.

Learn more about mole here

https://brainly.com/question/26416088

#SPJ2

Answer:

No and yes

Explanation:

Xenon is a noble gas and beryllium is a metal

Answer: no and yes i also agree

Xenon is a noble gas and Beryllium a metal

Explanation:

This problem is providing us with the initial solubility and pressure of a gas and asks for the solubility once the pressure is changed to 10 kPa. At the end, the answer is found to be 0.4 g/L.

In chemistry, the concept of ideal gas provides us first approach to the understanding of gases, as a model with no interactions and perfectly spherical-shaped molecules, however, this is not an actual a fact in nature.

Thus, we can relate pressure, volume, temperature and moles (or grams) by using the widely-known ideal gas equation:

PV = nRT

Which in the case of the solubility of the gas, can be written as:

P=Sol*RT*MM

Which at constant temperature can be just:

\(\frac{P}{Sol} =k\)

Since R, T and MM (molar mass of the gas) are constants, and for two states:

\(\frac{P_1}{Sol_1} =\frac{P_2}{Sol_2}\)

In such a way, one can calculate the solubility when the pressure changes as follows:

\(Sol_2=\frac{Sol_1*P_2}{P_1}\)

Finally, we plug in the numbers to obtain:

\(Sol_2=\frac{2g/L*10kPa}{50kPa} =0.4g/L\)

Learn more about ideal gases: brainly.com/question/8711877

1 - causes the molecules of the object or surface it strikes to vibrate faster, increasing its temperature.

2-carbon dioxide, methane, nitrous oxide, and water vapor it has to be one of these 3

3-The greenhouse effect is the way in which heat is trapped close to Earth's surface by “greenhouse gases.”

4- because of the fossil fuels that people are burning for energy.

5- due to human activities

The difference between the IR spectrum of the ketone product and the alcohol starting material can be seen in the absorption bands present in each spectrum.

In the IR spectrum of the alcohol starting material, there will be a strong, broad absorption band between 3200 and 3600 cm-1, which corresponds to the O-H stretch of the alcohol functional group.

In the IR spectrum of the ketone product, there will be a strong, sharp absorption band between 1670 and 1780 cm-1, which corresponds to the C=O stretch of the ketone functional group.

These spectra can help determine whether the reaction worked by comparing the absorption bands present in each spectrum. If the alcohol starting material has a strong O-H stretch and the ketone product has a strong C=O stretch, then it can be concluded that the reaction worked and the alcohol was successfully converted into a ketone.

However, if the ketone product does not have a strong C=O stretch or if the alcohol starting material still has a strong O-H stretch, then it can be concluded that the reaction did not work and the alcohol was not successfully converted into a ketone.

Learn more about IR spectrum at https://brainly.com/question/29794652

#SPJ11

Option. D. It can be organic. Organic materials are not considered minerals because they are derived from living organisms and do not have a crystalline structure.

The other three criteria are commonly used to define minerals. Minerals must be a solid, have a definite chemical composition represented by a chemical formula, and occur naturally in the Earth's crust. Additionally, minerals must have a crystalline structure, meaning their atoms are arranged in a highly ordered, repeating pattern.

These defining criteria are used by geologists to identify and classify minerals.The correct answer to your question is D. It can be organic. Minerals are defined by specific criteria: they must be solid, have a specific chemical formula, and be naturally-occurring. However, minerals are inorganic, meaning they do not contain organic compounds derived from living organisms.

To know about crystalline:

https://brainly.com/question/28274778

#SPJ11

Answer:

a gas at very low temperatures, when gas particles have very little kinetic energy

Explanation:

Answer:

B, C, and E!

Explanation:

got it correct on edge! :)

At a pressure of 5.0 atm, IS 200 L of gas would need to be stored in the volume tank (V2).

To learn more about volume, refer to:

https://brainly.com/question/27100414

#SPJ1

Answer:

The correct answer is (B) Oxygen is usually -2.

Explanation:

I did this test last week lol ;)

Hello

A chiral carbon atom is an atom that is attached to four different groups of atom. In the 3 structures given, only two atoms have a chiral center.

I'll proceed to draw the structure and indicate the chiral atom below.

If we look at this chiral carbon, we would notice some different in this particular carbn atom and that it is surrounded by 4 different carbon atoms namely

If we carefully look at this, we would see that it is bonded with CH₂, H, NH₂ and COO

In the second structure, we can see that there's no carbon atom that possess this distinctive and unique characteristic of a chiral center.

Lastly, in this compound, we have a carbon atom with one chiral center which is the second carbon atom. Just like in the pervious question above, it is surrounded by CH₂, H, NH₂ and COOH atoms and this makes it a chiral center.

In the question given, only compound 1 and 3 have one chiral carbon atoms.

In order to write balanced half-reactions for the oxidation and reduction that occur in a chemical reaction, we first need to identify the species being oxidized and reduced. The (aq) and (s) labels indicate the states of the reactants and products.

Let's assume the reactants are A(aq) and B(s), and the products are C(aq) and D(s).

The oxidation half-reaction involves the species being oxidized, which loses electrons. The reduction half-reaction involves the species being reduced, which gains electrons.

To balance the half-reactions, we need to ensure that the number of atoms on both sides of the equation is the same and that the charges are balanced.

For example, if A is being oxidized and B is being reduced, the balanced half-reactions could be:

Oxidation half-reaction:
A(aq) → C(aq) + e-

Reduction half-reaction:
B(s) + e- → D(s)

So, the oxidation half-reaction is A(aq) → C(aq) + e- and the reduction half-reaction is B(s) + e- → D(s). To write the balanced half-reactions, we need to ensure that the number of atoms on both sides of the equation is the same and that the charges are balanced. In the oxidation half-reaction, A(aq) is being oxidized and loses an electron (e-). The resulting product is C(aq). On the other hand, in the reduction half-reaction, B(s) is being reduced and gains an electron (e-). The resulting product is D(s). By balancing the atoms and charges, we can write the balanced half-reactions as follows:
Oxidation half-reaction: A(aq) → C(aq) + e-
Reduction half-reaction: B(s) + e- → D(s)

The balanced half-reactions for the oxidation and reduction in the chemical reaction are A(aq) → C(aq) + e- and B(s) + e- → D(s), respectively.

To learn more about balanced half-reactions visit:

brainly.com/question/14339821

#SPJ11

Answer:

balanced forced

Explanation:

The solution created by dissolving 10.0 g of sodium hydroxide in a solution with a final volume of 150.0 mL has a 1.67 M concentration of hydroxide ions.

Dilution is the process in question. M1V1 = M2V2, where M1 and V1 are the volume and molarity of the initial concentrated solution, respectively, and M2 and V2 are those of the final diluted solution. This equation can be used to compare concentrations and volumes before and after a dilution.

Calculate the number of moles of sodium hydroxide (NaOH) using its molar mass.

Molar mass of NaOH = 23.0 g/mol + 16.0 g/mol + 1.0 g/mol = 40.0 g/mol

Number of moles of NaOH = mass / molar mass = 10.0 g / 40.0 g/mol = 0.250 mol

Calculate the concentration of hydroxide ions (OH-) in moles per liter (M).

Since the final volume of the solution is 150.0 mL, we need to convert it to liters by dividing by 1000:

Final volume = 150.0 mL / 1000 = 0.150 L

Concentration of hydroxide ions = moles of NaOH / final volume

Concentration of OH- ions = 0.250 mol / 0.150 L = 1.67 M

To know more about concentration visit:-

https://brainly.com/question/10725862

#SPJ1

The delta h in kJ of heat released per mole of NH3(g) formed in C)50.2kJ

To determine the delta H (ΔH) in kJ of heat released per mole of NH3(g) formed, we need to use the information provided and apply the concept of enthalpy change.

The given balanced equation for the Haber process is:

\(N_{2}(g) + 3H_{2}g → 2 NH_{3}(g) + 100.4KJ\)

From the equation, we can see that 2 moles of \(NH_{3}\) are formed per reaction, and 100.4 kJ of heat is released.

However, the yield of \(NH_{3}\) is stated to be approximately 98%. This means that for every 100 moles of N2 and H2 that react, approximately 98 moles of \(NH_{3}\) are formed.

So, for the formation of 98 moles of \(NH_{3}\), the amount of heat released would be:

(98 moles \(NH_{3}\) / 2 moles \(NH_{3}\)) * 100.4 kJ = 49.2 kJ

Therefore, the delta H of heat released per mole of \(NH_{3}\)(g) formed is approximately 49.2 kJ. Among the given options, the closest value is 50.2 kJ (option c), which represents the delta H value rounded to one decimal place. Therefore, Option C is correct.

Know more about enthalpy change here:

https://brainly.com/question/14047927

#SPJ8

Answer:get a ruler and find out

Explanation:

measure from tip to tip and post a picture to see

Answer:baby carrots

Explanation:

measure with baby carr

nutrition, respiration, transportation, excretion, control. and coordination.

The use of stable oxygen isotopes in reconstructing ancient climates is a powerful tool that has contributed greatly to our understanding of past environmental changes. However, it is important to consider other factors that may influence the isotopic composition of precipitation and to use multiple lines of evidence when making interpretations about past climate conditions.

Stable oxygen isotopes (specifically, oxygen-18 and oxygen-16) are commonly used in reconstructing ancient climates because they can provide information about temperature and precipitation patterns.

1) Oxygen-18 is less abundant than oxygen-16 and has a slightly higher atomic mass. This means that it is preferentially incorporated into precipitation that forms at colder temperatures, such as snow and ice.

2) The ratio of oxygen-18 to oxygen-16 in carbonate minerals, such as those found in shells and corals, can also be used to reconstruct past temperatures. This is because the incorporation of oxygen isotopes into these minerals is influenced by both temperature and the isotopic composition of the water in which the organism lived.

3) Oxygen isotopes can also provide information about past precipitation patterns. For example, in regions where the dominant source of precipitation is from ocean evaporation, the oxygen isotope composition of precipitation can reflect the isotopic composition of the ocean water.

For such more questions on Oxygen isotopes:

https://brainly.com/question/160068

#SPJ11

Answer:

Agriculture, manufacturing, and food processing.

Explanation:

I think these are the answers if they are wrong I apologize.

1. Agriculture: raising crops, livestock and seafood.

2. Manufacturing: agrochemicals, agricultural construction, farm machinery and supplies, seed, etc.

3. Food processing: preparation of fresh products for market, and manufacture of prepare food products.

I hope this helps!

The three major systems include: crops only, livestock only, and an integrated crops and livestock system.

Food production methods:

Learn more:

brainly.com/question/24929731

Out of the options listed, "Water vapor, carbon dioxide, and other volatile organic compounds (VOCs)" would not be considered a material stream exiting the roaster.

A material stream is a flow of a physical substance, such as a solid, liquid, or gas, that enters and exits a system or process. In the context of a chemical or process plant, a material stream is a stream of raw materials, intermediate products, or final products that are being produced, transported, or processed.

To perform a mass balance on a coffee roaster, you would consider all the material streams that enter and exit the system. These are gaseous emissions resulting from the roasting process and are not a physical material. The other options, "Spent coffee grounds," "Chaff," and "Roasted coffee beans" are physical materials that can be weighed and measured, and would be considered as material streams exiting the roaster.

Learn more about Water vapor:

brainly.com/question/22349941

#SPJ4

To quickly find the number of resonating structures of O3 and SO4-2, you can use the formula:

Number of resonating structures = 2^(number of equivalent resonance structures)

For O3, each oxygen atom is equivalent and there are two possible equivalent resonance structures:

O = O - O and O - O = O

Therefore, the number of resonating structures for O3 is:

2^(2) = 4

For SO4-2, there are two equivalent resonance structures for the sulfur-oxygen bonds and four equivalent resonance structures for the sulfate ion as a whole:

S = O and S - O(-)

O(-) - S - O and O = S = O(-)

Therefore, the number of resonating structures for SO4-2 is:

2^(2) x 2^(4) = 16

So the number of resonating structures for O3 is 4, and the number of resonating structures for SO4-2 is 16.

Water molecules can exist as solids, liquids, or gases because of the unique properties of hydrogen bonding.

Hydrogen bonds are weak chemical bonds that form between hydrogen atoms of one molecule and oxygen atoms of another molecule. In water, each molecule can form up to four hydrogen bonds with its neighboring molecules, which gives water its unique properties.

When water molecules are in a solid state (ice), they are tightly packed and held together by hydrogen bonds, which results in a rigid, crystalline structure.

In a liquid state, water molecules still have hydrogen bonds, but they are more spaced out and can move around freely, resulting in a fluid state.

In a gaseous state, water molecules are moving rapidly and have weak or no hydrogen bonds, resulting in a state where they can expand and fill any container they are placed in.

Therefore, the ability of water molecules to exist as solids, liquids, or gases is due to the nature of hydrogen bonding and the varying degree of interactions between water molecules in different states.

To know more about hydrogen click here:

brainly.com/question/28937951

#SPJ4

Answer:

310 u

Explanation:

Hence, the formula unit mass for Ca 3 ( PO 4 ) 2 is 310 u .