One liter of a solution ph 9 has how many more hydroxide ions (oh-) than 1 l of a solution of ph 4?

Answers

Answer 1
100,000 times more. The rule is that the product of the concentration of (H+) and (OH-) in molars is always 10^-14 (if it is more, they combine and produce simple water which brings the product back down to this number again. If it is less, water molecules will split to bring the product back up to equilibrium).
pH 9 means (H+) is 10^-9 molar. But that means (OH-) is 10^-5 at the same time.
pH 4 means (H+) is 10^-4 molar. But that means (OH-) is 10^-10 at the same time.
10^-5 / 10^-10 = 10^5 or 100,000 times more.
Answer 2
Final answer:

A solution with a pH of 9 has 100,000 times more hydroxide ions than a solution with a pH of 4 due to the corresponding pOH values and hydroxide ion concentrations based on the relationship between pH and pOH.

Explanation:

The student has asked about the difference in the number of hydroxide ions between a solution with a pH of 9 and another with a pH of 4. Using the relationship PH + pOH = 14, we can find the pOH.

For the pH 9 solution, the pOH would be 5 (14 - 9), which corresponds to a [OH-] of 1.0 × 10-5 M. For the pH 4 solution, the pOH would be 10 (14 - 4), corresponding to a [OH-] of 1.0 × 10-10 M. Hence, the pH 9 solution has 1.0 × 10-5 M of OH-, which is 100,000 times greater than the 1.0 × 10-10 M OH- in the pH 4 solution.


Related Questions

What choice is not a characteristic of a catalyst?

Answers

Catalysts do not change the final result of a reaction. They, themselves, are not changed, and they can change the nature of the reaction. In addition, they can also speed up or slow down the rate of the reaction, but they will not have an effect on the reaction's outcome.

A substance that cannot be broken down into simpler substances by chemical or physical means is called a

Answers

Explanation:

An element is a substance that is made up of only one type of atoms. It cannot be broken down into simpler substances.

For example, sodium, aluminium, nickel etc are all elements.

Whereas when two or more different elements combine together then it results in the formation of a compound.

For example, [tex]MgCl_{2}[/tex] is a compound.

Therefore, we can conclude that a substance that cannot be broken down into simpler substances by chemical or physical means is called an element.

A substance that cannot be broken down into simpler substances by any chemical or physical means is called a: chemical element.

A chemical element can be defined as a pure substance that comprises atoms having the same atomic number (number of protons) in its nuclei and as such it is the primary constituent of matter.

Basically, a chemical element is a pure substance that can't be broken down, decomposed or transformed by into simpler substances chemical or physical means.

In Chemistry, some examples of a chemical element include the following:

Argon.Sodium.Carbon.Oxygen.Hydrogen.

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When a substance goes directly from solid state to a gaseous state as dry ice does?

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A substance that goes from solid state to a gaseous state as dry ice does is said to have sublimed.

What is sublimation?

It is a process where substances transition from solid states to gaseous states without having to pass through the liquid state.

Most substances change from solid to liquid before transitioning to the gaseous state. The change from one state to another requires energy.

However, substances like iodine move straight from being a solid to being a gas. The reverse is also the case. They move straight from the gaseous state to the solid state without passing through the liquid state.

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Final answer:

Sublimation is the process where a substance like dry ice goes from solid to gas without passing through the liquid state. Deposition is the opposite, where gas becomes solid directly. Dry ice sublimation is commercially important for refrigeration and shipping perishable items.

Explanation:

Sublimation and Deposition-

When a substance such as dry ice transitions directly from a solid state to a gaseous state, this process is called sublimation. This endothermic phase transition occurs under certain conditions, bypassing the liquid phase entirely. For instance, at room temperature and standard pressure, dry ice, which is solid carbon dioxide (CO₂), undergoes sublimation, seeming to vanish as it turns into a gas without liquefying. In contrast, the reverse process where gas becomes solid without becoming liquid first is known as deposition, exemplified by frost forming on cold surfaces.

A familiar occurrence of sublimation involves dry ice used as a refrigerant because it's cold and transitions to gas without messy liquids, making it ideal for shipping perishable items. Natural examples include snow and ice, which can slowly sublime under low temperatures, especially with contributing factors like wind and reduced atmospheric pressure at higher altitudes. Another vivid example is solid iodine that, when warmed, sublimes to form a purple vapor.

The density of silver is 10.5 g/cm3. what volume would a piece of silver with a mass of 54.5 g occupy?

Answers

572.25 cm3 unless you're rounding to significant figures than it would be 572 cm3

In a chemical reaction sodium and chlorine react to form sodium chloride. Which term names the sodium?

Answers

reactant is the answer
hope it helps
Chemical names the sodium

Concepts to Understand (Give an example of each):
1. Significant figures
2. How to convert Celsius to Fahrenheit
3. How to convert Fahrenheit to Celsius
4. Metric prefixes
5. How to calculate density
6. Branches of Chemistry

Please help thank you very much.

Answers

1 Sig figs - the number of digits that are actually measured. 123 (3 sig figs) 1.20 (also 3 sig figs)

2 C --> F  (9/5)C + 32 = F

3 F ---> C (5/9)(F - 32)

4 Prefixes - certain designations that tells how much the unit is multiplied like Mega- is 1000000X and milli- is 1/1000

5 density = mass/volume

6 Branches - Inorganic, Organic, Analytical, Physical, Biochemistry, Forensics (There may be others, but these are the general categories)

Over time coral buried by sediments can turn into

Answers

granite  hope this help

A flashbulb contains magnesium and oxygen before use and magnesium oxide afterward, but its mass does not change.

Answers

This is an example of law of conservation of mass, which states that the total quantity of mass doesn't change means, in an isolated system mass is neither created nor destroyed by any chemical reactions or physical transformations.

According to law of mass conservation in a chemical reaction:

Mas of the Products = Mass of the Reactants

An atom of gold has a mass of 3.271 x 10^-22g. how many atoms of gold are in 5.00g of gold?

Answers

5.00g Au x(1 atom Au/3.271x10^-22 g) = 1.52858x10^22 atoms
Since one of your given terms has only 3 significant figures (5.00g), your answer should only have 3 sig figs showing: 1.53x10^22 atoms Au

Answer:

number of gold atoms = [tex]1.528X10^{22}[/tex]

Explanation:

The mass of one atom of gold is given to be = [tex]3.271X10^{-22}[/tex]

The mass of gold is given to be = [tex]5.00g[/tex]

In order to determine the number of atoms present in the 5 g of gold, we will divide the mass of the gold with the mass of each atom of the gold.

the number of atoms = [tex]\frac{massofgold}{massofatom}=\frac{5}{3.271X10^{-22}} =1.528X10^{22}[/tex]

Thus number of gold atoms = [tex]1.528X10^{22}[/tex]

What subatomic particle is most involved in making chemical bonds?

Answers

an electron i hope this helps

Is wood a homogeneous or heterogeneous mixture?

Answers

Wood is a Heterogeneous Mixture.

Hope this helps
Final answer:

Wood is a heterogeneous mixture due to its composition of various easily distinguishable components such as cellulose fibers and lignin.

Explanation:

Wood is considered a heterogeneous mixture because it is composed of different components that can be easily distinguished. These components include cellulose fibers, lignin, and extracts such as resins and oils. The presence of knots, grain patterns, and different colors in wood further supports its classification as a heterogeneous mixture.

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calculate the average atomic mass for neon if its abundance in nature is 90.5% neon-20, 0.3% neon-21, and 9.2% neon-22

Answers

The average atomic mass of Neon would simply be the sum of the weighted average of each isotope. That is:

average atomic mass = 0.905 * 20 + 0.003 * 21 + 0.092 * 22

average atomic mass = 20.187 amu 


Answer: 20.187 amu

Explanation:

20(0.905)+21(0.003)+22(0.092)

A ray in the emission spectrum has a wavelength of 3.10 x 1014 meters. Given that the speed of light is 2.998 x 108 m/s, what is the frequency of the ray?

A.0.967 x 10-6 HZ
B.9.2938 x 10-7 HZ
C.0.967 x 10-5 HZ
D.9.2938 x 107 HZ

Answers

0.967 x 10^-6 HZ

This should be correct (:
The answer would be
A) 0.967 x 10-6 HZ

Sodium nitrate and lead (ii) acetate express your answer as a chemical equation. identify all of the phases in your answer. enter noreaction if no no reaction occurs.

Answers

Final answer:

Sodium nitrate and lead (II) acetate both dissolve in water and do not react with each other; thus, there is no reaction and no precipitate is formed.

Explanation:

The student is inquiring about the chemical reaction that occurs when solutions of sodium nitrate and lead (II) acetate are mixed. When mixing these two compounds, there is no reaction because both sodium nitrate and lead (II) acetate are soluble in water. As such, no precipitate forms, and the ions remain in solution. Therefore, the correct response to this question is that no reaction occurs.

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Which statements accurately describe the polarity and electronegativity of water?

Answers

The statement that most accurately and effectively described the polarity and electronegativity in water is that the covalent bonds within these water molecules bind with the single oxygen atom in the molecule, as well as the two hydrogen atoms that it holds as well.

Or most atoms, a stable configuration of electrons is attained when the atom __________.

Answers

For most atoms, a stable configuration of electrons is attained when the atom HAS 8 ELECTRONS IN ITS OUTERMOST SHELL.

When is there no solution to a compound inequality?

Answers

Many times, solutions lie between two quantities, rather than continuing endlessly in one direction. For example systolic (top number) blood pressure that is between 120 and 139 mm Hg is called borderline high blood pressure. This can be described using a compound inequality, b < 139 and b > 120. Other compound inequalities are joined by the word “o

What are the different ways to represent compounds? check all that apply. check all that apply. the kolbe formula a structural formula a ball model an empirical formula a space-filling model a molecular formula a ball and stick model a cylindric model?

Answers

Compounds can be exemplified in two main ways. These are Chemical Formula and Molecular Model.


Chemical formula includes:


Structural formula – this is a formula that shows the arrangement of atoms in the molecule of a compound.


Molecular formula – this is a formula giving the number of atoms of each elements to present in one molecule of a specific compound.


Empirical formula – this is a formula giving the proportions of elements present in a compound.


Molecular model:


Space-filling model - represents atoms fill the space between each other.


Ball and stick model - represents atoms as balls and chemical bonds as sticks.

 

Remember that a compound is a substance that is formed when two or more elements are bonded together.

Final answer:

Compounds can be represented in several ways including Molecular Formulas, Empirical Formulas, Structural Formulas, Ball-and-Stick Models, and Space-Filling Models. Each method provides different levels of detail and helps us understand the composition and structure of chemical compounds.

Explanation:

Compounds can be represented in several ways: Molecular Formulas, Empirical Formulas, Structural Formulas, Ball-and-Stick Models, and Space-Filling Models.

Molecular formulas use chemical symbols and subscripts to indicate the exact numbers of different atoms in a molecule or compound. For instance, the molecular formula for water is H2O, indicating there are two hydrogen atoms and one oxygen atom.

Empirical formulas give the simplest whole-number ratio of atoms in a compound. For water, the empirical formula would still be H2O.

Structural formulas indicate the bonding arrangement of the atoms in the molecule, giving more detailed information about the molecule's structure.

Ball-and-stick models show the geometric arrangement of the atoms in a molecule with atomic sizes not to scale. These models often use balls to represent atoms and sticks to represent chemical bonds.

Lastly, Space-filling models also show the geometric arrangement of atoms, but in these models, the relative sizes of the atoms are represented accurately and the model gives a more realistic view of the molecule's shape.

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What is the approximate percentage of corn syrup that would make an isotonic solution for the egg?

Answers

This can be answered when you execute the egg osmosis sample. All you have to do is submerge the egg in the corn syrup. Since the corn syrup is more concentrated than the egg, the solute would pass through the egg's cellular membrane. In exchange, the water from the egg would go to the syrup. It will achieve equilibrium when both the egg and the corn syrup would have equal osmotic pressures. The solution would be isotonic at approximately 42% corn syrup.

What mass of ammonium chloride should be added to 2.45 l of a 0.165 m nh3 in order to obtain a buffer with a ph of 9.50?

Answers

To create a buffer with a pH of 9.50 using 2.45 L of 0.165 M [tex]NH_3[/tex], approximately 38.5 grams of ammonium chloride must be added, as calculated using the Henderson-Hasselbalch equation and considering the molar mass of [tex]NH_4Cl[/tex].

To calculate the mass of ammonium chloride (NH4Cl) needed for a buffer solution with a desired pH, we use the Henderson-Hasselbalch equation: pH = pKa + log([Base]/[Acid]). Ammonium chloride, when dissolved, provides the ammonium ion ([tex]NH_4^+[/tex]), which acts as the acid in this buffer system, whereas ammonia ([tex]NH_3[/tex]) acts as the base.

First, we need to find the pKa of [tex]NH_3[/tex], which is the negative logarithm of the dissociation constant (Ka) of its conjugate acid, [tex]NH_4^+[/tex]. If the pKa of [tex]NH_3[/tex] is 9.25, then using the desired pH of 9.50, we can set up the equation as follows:

[tex]pH = 9.25 + log(\frac{[NH_3]}{[NH_4^+]})[/tex]

[tex]9.50 = 9.25 + log(\frac{[0.165 M]}{[NH_4^+]})[/tex]

Solving for [[tex]NH_4^+[/tex]], we find that:

[tex]log(\frac{[NH_4^+]}{0.165}) = 9.50 - 9.25[/tex]

[tex]log(\frac{[NH4+]}{0.165}) = 0.25[/tex]

[tex][NH_4^+] = 10^{0.25} [NH_4^+] = 1.778 \frac{[NH4+]}{0.165} = 1.778[/tex]

[tex][NH_4^+] = 0.293 M[/tex]

Now, to find the mass of NH4Cl required, we use the formula:

mass = molarity volume molar mass

mass = (0.293 M) (2.45 L) (53.491 g/mol)

mass = 38.511 g (rounded to three significant figures)

Therefore, to prepare a buffer solution with a pH of 9.50 using a 2.45 L solution of 0.165 M [tex]NH_3[/tex], you must add approximately 38.5 grams of [tex]NH_4Cl[/tex].

The element "um" is what type of word element?

Answers

That’s not an element.
Yea that’s not an element maybe your wrote it wrong

Classify each example as an element a compound a heterogeneous mixture or a homogeneous mixture a pure drinking water

Answers

Final answer:

Substances are classified based on their chemical composition into elements (e.g., gold), compounds (e.g., salt, pure water, carbon dioxide), homogeneous mixtures (e.g., salt water, pure air), and heterogeneous mixtures (e.g., soil, bronze).

Explanation:Classification of Substances

Substances can be classified into four main categories based on their chemical composition: elements, compounds, homogeneous mixtures, and heterogeneous mixtures. The classification for each of the given substances is as follows:

Salt (sodium chloride): CompoundPure water (H2O): CompoundSoil: Heterogeneous mixtureSalt water: Homogeneous mixture (solution)Pure air: Homogeneous mixture (solution)Carbon dioxide (CO2): CompoundGold (Au): ElementBronze: Heterogeneous mixture

An element is a pure substance that cannot be broken down into simpler substances. A compound is a pure substance that consists of two or more elements chemically combined in a fixed ratio. A homogeneous mixture, or solution, has uniform composition throughout, whereas a heterogeneous mixture has a composition that varies from point to point.

Imagine two electrons: one is close to the nucleus and one is far away. Which electron would be easier to remove from the atom and why?

Answers

Far away from the atom because think of it like a magnet. Nucleus is positive charge while Electron is negative charge. Put opposite charges together like a magnet its going to attract and take some effort to separate them. Now put two opposite charge a foot away from each other, you should be able to move it no problem.

The electron which is far away from the nucleus is easier to remove than the electron which is close to the nucleus.

What is the nuclear charge?

The total charge of all the protons is equal to the nucleus will have charge. This total positive charge on the nucleus, all the protons present inside is called a nuclear charge.

The total number of protons in an atom is the atomic number of that atom, so the nuclear charge has the same value as that of the atomic number.

The electron present close to the nucleus experience a more effective nuclear charge. So it is difficult to remove these electrons from the atom.

While electron present in the outermost shell or far away from the nucleus experience less effective nuclear charge. So less amount of energy is required to remove these electrons from the nucleus.

Therefore, the electrons that lie far away from the nucleus are easier to remove from the atom

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If 40.0 g S is allowed to react as completely as possible with 150.0 g F2(
g., what mass of the excess reactant is left?

Answers

Final answer:

To calculate the mass of the excess reactant remaining, we need to find the limiting reactant and use stoichiometry. In this case, the mass of the excess reactant (F2) that is left is 78.86 g.

Explanation:

To determine the mass of the excess reactant left, we need to first calculate the amount of S that reacts completely with F2. We can do this by using stoichiometry and the balanced chemical equation. The balanced equation for the reaction between S and F2 is:

2S + 3F2 → 2SF6

From the equation, we can see that 2 moles of S react with 3 moles of F2. We can convert the given masses of S and F2 to moles using their molar masses:

Molar mass of S: 32.06 g/molMolar mass of F2: 38.00 g/mol

Using these molar masses, we can calculate the number of moles of S and F2:

Number of moles of S = (40.0 g S) / (32.06 g/mol S) = 1.248 mol SNumber of moles of F2 = (150.0 g F2) / (38.00 g/mol F2) = 3.947 mol F2

Since the reaction is 2:3, we can calculate the limiting reactant and the amount of excess reactant remaining. Since we have more F2 than needed, S is the limiting reactant and F2 is in excess.

To calculate the mass of the excess reactant remaining, we need to know how much F2 reacted completely with the S. We can do this by using the stoichiometric ratio:

Calculate the moles of F2 reacting with S: (1.248 mol S) × (3 mol F2 / 2 mol S) = 1.872 mol F2Calculate the mass of F2 reacting with S: (1.872 mol F2) × (38.00 g/mol F2) = 71.14 g F2Calculate the mass of excess reactant remaining: (150.0 g F2) - (71.14 g F2) = 78.86 g F2

Therefore, the mass of the excess reactant (F2) that is left is 78.86 g.

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Arrange the orbitals in the order in which they fill and indicate the maximum number of electrons each can hold.

Answers

An energy level of a certain atom is further divided into the orbitals. There are four (4) orbitals. These are the s orbitals, p orbitals, d orbitals, and f orbitals. They are already arranged above as to how they are to be filled. The number of electrons that each can hold are as follows:
 s orbitals = 2 electrons
 p orbitals = 6 electrons
 d orbitals = 10 electrons
 f orbitals = 14 electrons

Answer:

Explanation:

We can fill maximum two electrons in one orbital. The s subshell has 1 orbital that can filled upto two electrons, the p subshell has 3 orbitals that can filled upto six electrons, the d subshell has 5 orbitals that can filled upto ten electrons, the f subshell has 7 orbitals that can filled upto fourteen electrons.

According to the energy level diagram, the 2p, 3p, 4p each can hold 6 electrons because they have 3 orbitals, and 3d, 4d each can hold 10 electrons because they have 5 orbitals, the 5f, 6f, each can hold 14 electrons because they have 7 orbitals. Therefore, the maximum number of electrons would be present in f subshell or 6f orbital.

If 6.00 g of the unknown compound contained 0.200 mol of C and 0.400 mol of H, how many moles of oxygen, O, were in the sample?

Answers

Convert moles to mass.

mass C = 0.2 mol * 12 g / mol = 2.4 g

mass H = 0.4 mol * 1 g / mol = 0.4 g

So mass left for O = 6 g – (2.4 g + 0.4 g) = 3.2 g

 

Calculating for moles O given mass:

moles O = 3.2 g / (16 g / mol) = 0.2 moles

 

Answer:

0.2 moles O

Answer : The moles of oxygen present in the sample is, 0.2 moles

Explanation : Given,

Moles of carbon = 0.200 mole

Moles of hydrogen = 0.400 mole

Mass of unknown compound = 6.00 g

Molar mass of carbon = 12 g/mole

Molar mass of hydrogen = 1 g/mole

Molar mass of oxygen = 16 g/mole

First we have to calculate the mass of carbon and hydrogen.

[tex]\text{Mass of carbon}=\text{Moles of carbon}\times \text{Molar mass of carbon}=(0.200mole)\times (12g/mole)=2.4g[/tex]

[tex]\text{Mass of hydrogen}=\text{Moles of hydrogen}\times \text{Molar mass of hydrogen}=(0.400mole)\times (1g/mole)=0.4g[/tex]

Now we have to calculate the mass of oxygen.

Total mass of unknown compound = Mass of carbon + Mass of hydrogen + Mass of oxygen

6.00 = 2.4 + 0.4 + Mass of oxygen

Mass of oxygen = 3.2 grams

Now we have tom calculate the moles of oxygen.

[tex]\text{Moles of oxygen}=\frac{\text{Mass of oxygen}}{\text{Molar mass of oxygen}}=\frac{3.2g}{16g/mole}=0.2moles[/tex]

Therefore, the moles of oxygen present in the sample is, 0.2 moles

What experimental evidence did thomson use to support his hypothesis that atoms of all elements are made up of even smaller, charged particles?

Answers

Identical particles were produced no matter which metal he used.

Answer is: Identical particles were produced no matter which metal he used.

J.J. Thomson placed two oppositely charged electric plates around the cathode ray. He did experiments using different metals as electrode materials and found that the properties of the cathode ray remained constant no matter what cathode material he used.

Tomson concluded that atoms are divisible and that the corpuscles are their building blocks (atoms are made up of smaller particles).

J. J. Thomson discovered the electron in 1897.

His "plum pudding" model (1904) suggested: the electrons are embedded in the positive charge.

With this model, he abandoned his earlier hypothesis (the atom was composed of immaterial vortices).  

Anyone wanna help me in chem?? PLEASE

Answers

Yes, did I seriously just get 10 points for that?
I can actually help you tho, what's your question?
what do you need help with?

The urms of h2 molecules at 273k is 1.84×103m/s.part aat what temperature is urms for h21.8 times greater than this value?

Answers

The formula for calculating urms is given as:

urms = sqrt (3 R T / M)

where,

R is gas constant = 8.314 J / mol K

T is absolute temperature = ?

M is molar mass of H2 = 2 x 10^-3 kg/mol

 

Calculating for T:

1.8 * (1.84×10^3) = sqrt (3 * 8.314 * T / 2x10^-3)

T = 879.59 K      (ANSWER)

Answer:

The temperature will be 879.59K for 21.8 times higher than this value.

Explanation:

The Equation for calculating Root Mean Square Velocity([tex]\rm U_r_m_s[/tex])

[tex]\rm \mathbf{U_r_m_s}=\sqrt\frac{3RT}{M}[/tex]

Where,

[tex]\rm \mathbf{U_r_m_s}[/tex] is Root Mean Square Velocity in m/s.

R is gas constant which is [tex]\rm \texttt{8.314 J/mol K}[/tex]

T is the temperature at Kelvin, what do we need to calculate here?

M is the molar mass of  [tex]\rm H_2[/tex] which is [tex]\rm 2\times10^-^3\texttt{kg/mol}[/tex]

Now, put the value according to the equation above,

[tex]\rm 1.8 \times (1.84\times10^3)=\sqrt\frac{3 \times8.314 \times T}{2\times10^-^3} \\\rm \mathbf{T=879.59K}[/tex]

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When nitrogen and tin (sn4+) form an ionic compound, what is the formula? n3sn4 sn4n3 sn3n4 n4sn3?

Answers

I think the answer is Sn3N4
N4Sn3 is the correct answer
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