what is the hydrogen ion concentration of a solution with ph

Yes, water molecules can evaporate. Evaporation is a physical process where a liquid turns into a gas, and it occurs when the molecules of the liquid gain enough energy to break free from their bonds and escape into the air. When water is exposed to air, some of its molecules will gain enough energy to evaporate and become water vapor in the atmosphere. This is why clothes dry when hung outside, and why puddles disappear on a hot day. The rate of evaporation depends on several factors, including temperature, humidity, and air movement, among others.

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The mass of blood in a person is approximately 10.31 pounds. The mass of blood in a person can be calculated by multiplying the blood volume by the average density of human blood.

Given that the blood volume is 0.00443 m³ and the average density is 1060 kg/m³, we can find the mass as follows:

Mass = Volume x Density

Mass = 0.00443 m³ x 1060 kg/m³

Mass = 4.6858 kg

Therefore, the mass of blood in a person is approximately 4.6858 kilograms.

To find the mass of blood, we need to multiply the blood volume by the average density of human blood. The blood volume is given as 0.00443 m³. The average density of human blood is 1060 kg/m³. By multiplying these values together, we get the mass of blood in kilograms.

In this case, the mass of blood is approximately 4.6858 kilograms.

To convert this mass to pounds, we can use the conversion factor that 1 kilogram is equal to 2.20462 pounds. By multiplying the mass in kilograms by this conversion factor, we can find the mass in pounds.

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Answer:

sulphuric acid

Explanation:

The autotrophs that have silica incorporated into their cell walls are diatoms. Option(D)

Diatoms are a type of microalgae found in both freshwater and marine environments. They have a unique external skeleton called a frustule, which is composed of silica.

The frustule provides structural support and protection to the diatom cell. Coccolithophorids, dinoflagellates, and radiolarians are other types of marine microorganisms but do not have silica in their cell walls.

Autotrophs are organisms capable of producing their own food using energy from sunlight (photosynthesis) or inorganic chemicals (chemosynthesis). They convert raw materials into organic compounds, serving as the primary producers in ecosystems.

Coccolithophorids are a group of single-celled algae found in marine environments. They are characterized by tiny calcified plates called coccoliths that cover their cell surface. These coccoliths play a role in carbon cycling and are significant contributors to marine sediment and biogeochemical processes.

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Answer:

(A) It increases in temperature

Answer:

12 g

Explanation:

From the question given above, the following data were:

Number of atoms = 6.02×10²³ atoms

Mass of ₆C¹² =?

From Avogadro's hypothesis,

1 mole of any substance contains 6.02×10²³ atoms. This implies that 1 mole of ₆C¹² also contains 6.02×10²³ atoms i.e

1 mole of ₆C¹² = 6.02×10²³ atoms

Recall

From the period,

1 mole of ₆C¹² = 12 g

Thus,

12 g of ₆C¹² = 6.02×10²³ atoms

Therefore, 12 g of ₆C¹² contains 6.02×10²³ atoms

The atom that moves at its rms velocity at 100°C with a wavelength of 2.31 * 10 m is : SULPHUR ( s )

To determine the atom we will have to determine the molar mass of the atom

Applying De Broglie equation

λ = h / mv

Vrms = \(\sqrt{\frac{3RT}{M} }\)  ---- ( 1 )

Where : λ  = 2.31 * 10⁻¹¹,  R = 8.314 J / k.mol,  T = 373 K, h = 6.626 * 10⁻³⁴ J.s

From equation ( 1 )

M = ( h² Ua ) / 3RT*λ² --- ( 2 )

where : Ua ( mass of an atom ) = 6.022 * 10²³,  h = 6.626 * 10⁻³⁴,  R = 8.314 J / k.mol, λ  = 2.31 * 10⁻¹¹,    T = 373 K

Insert values into equation ( 2 )

M ( molar mass ) = 32 g/mol

Sulphur has a molar mass of 32 g/mol therefore the atom is sulphur.

Hence we can conclude that The atom that moves at its rms velocity at 100°C with a wavelength of 2.31 * 10 m is : SULPHUR ( s ).

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Answer:

The pH scale measures acidity of a substance. known as potential of hydrogen, it varies from 0 to 14 with 7 being the pH value of a neutral solution. Below 7 shows the substance is acidic in nature and above 7 is alkaline in nature. pH 0-3 are considered strong acids while pH 4-6 are weak acids. pH 8-10 are weak alkalines and pH 11-14 are strong alkalines. This is a general trend and there may be exeptions especially if the substance has a negative pH. However, it would not be covered likely unless you are doing university chemistry.

Answer:

Its a or d if im stupid my b

Explanation:

Binary ionic compounds consist of atoms of only two atoms  and hence the term binary is given to them.

Ionic compounds or electrovalent compounds are  the type of compounds which are  formed between two elements when there is an exchange of electrons which takes place between  the atoms resulting in the formation of ions.

When the atom looses an electron it develops a positive charge and forms an ion called the cation while the other atom gains the electron and develops a negative charge  and forms an ion called the anion.

As the two atoms are oppositely charged they attract each other which results in the formation of a bond called the ionic bond and the compound is called ionic compound.

When the compounds consist of atoms  of only two elements the compound is called as a binary ionic compound.

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Answer:

Up to now, we have presented chemical reactions as a topic, but we have not ... A single-replacement reaction is a chemical reaction in which one element is ... single-replacement reactions will occur between two given reactants. This is ... Use the activity series to predict the products, if any, of each equation.

Explanation:

NH4Cl, when dissolved in water, ionizes into NH4+ and Cl- ions. In a basic solution, the NH4+ ion can react with the OH- ion to produce NH3 gas and water, leading to a change in pH and potential hemolysis.

When NH4Cl is dissolved in water, it dissociates into NH4+ and Cl- ions due to the ionic nature of the compound. In a basic solution, there is an abundance of OH- ions. The NH4+ ion can react with the OH- ion through a process called neutralization or base-catalyzed hydrolysis.

The reaction can be represented as follows:

NH4+ + OH- → NH3 + H2O

In this reaction, the NH4+ ion accepts an OH- ion, forming NH3 (ammonia) gas and water. The release of ammonia gas can lead to an increase in pH and a change in the ionic balance within the solution.

Hemolysis refers to the rupture or destruction of red blood cells. Changes in pH and ionic balance can disrupt the osmotic balance of the cells, causing them to swell or shrink. In the case of NH4Cl, the reaction between NH4+ and OH- ions can alter the pH of the solution, potentially leading to hemolysis if red blood cells are exposed to it.

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Answer:

Twelve electrons

Explanation:

If we look at the product side, we will notice that iron lost twelve electrons and oxygen gained twelve electrons.

Hence, we have 4Fe^3+ and 2O3^2- showing twelve electrons lost/gained.

Answer:

How many electrons does the iron half-reaction lose?

12

How many electrons does the oxygen half-reaction gain?

12

What is the total number of electrons that are moved in this oxidation-reduction reaction?  12

Explanation:

We have that  the the physical properties we use to classify metals are  Reactivity, Smell, and Density

Metals

Metals are materials that are higher conductors of heat and electricity the have free talent electrons that aids in conductivity

Nonmetals

These are materials that have a low conductivity of heat and electricity

Metalloids

These are the material that are found baring metal and non-metal properties mostly used as semi conductor

Generally,  

Metals,Non Metals and Metalloids are classified on the basis of their chemical properties.

Therefore

Reactivity, Smell, and Density are the the physical properties we use to classify metals

In conclusion

Reactivity, Smell, and Density are the the physical properties we use to classify metals

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Step 1

The reaction:

Ca(OH)2 (aq) + 2 HBr (aq) => CaBr2 (aq) + 2 H2O (l) (compelted and balanced)

----------------

Step 2

Information provided:

0.0105 M HBr

125 mL of 0.0100 M Ca(OH)2

----------------

Step 3

The number of moles of Ca(OH)2:

Molarity (mol/L) = moles of Ca(OH)2/volume of the solution (L)

Volume = 125 mL x (1 L/1000 mL) = 0.125 L

Therefore,

Molarity x volume (L) = moles

0.0100 mol/L x 0.125 L = 1.25x10^-3 moles of Ca(OH)2

-----------------

Step 4

The number of moles of HBr, by stoichiometry:

Ca(OH)2 (aq) + 2 HBr (aq) => CaBr2 (aq) + 2 H2O (l)

1 mol Ca(OH)2 ------ 2 moles HBr

1.25x10^-3 moles ------ X

X = 1.25x10^-3 moles x 2 moles HBr/1 mol Ca(OH)2

X = 2.5x10^-3 moles HBr

----------------

Step 5

The volume of HBr needed:

Molarity = moles of HBr/volume of solution (L)

Volume = moles of HBr/molarity

Volume = 2.5x10^-3 moles HBr/0.0105 mol/L

Volume = 0.238 L

Volume = 0.238 L x (1000 mL/1 L) = 238 mL

Answer: 238 mL or 0.238 L (there are no matches)

Answer:

60 i think im not sure

Explanation:

Answer:

-The independent variable is a variable often denoted by X, whose variation does not depend on that of another.

-The dependent variable is a variable often denoted by Y, whose value depends on that of another.

Answer:

Biological Evidence

Explanation:

Both blood and sweat are fluids within the body, therefore, both are biological substances.

The maximum amount of strong base that can be added to the buffer without significantly changing the pH is 0.35 mol.

What is Sodium Carbonate?

Sodium carbonate (\(Na_{2}\)\(CO_{3}\)) is a white, odorless powder that is commonly used in various applications such as in the manufacture of glass, soaps and detergents, water softening, and as a food additive. It is an ionic compound made up of sodium cations (Na+) and carbonate anions (\(CO_{3}\) 2-). It is also known as washing soda, soda ash, or sal soda.

Number of moles of NaH\(CO_{3}\) = 0.35 mol

To calculate the initial pH of the buffer, we need to use the Henderson-Hasselbalch equation:

pH = pKa + log([A-]/[HA])

where pKa is the acid dissociation constant of the weak acid in the buffer (in this case, carbonic acid, \(H_{2}\)\(CO_{3}\)), [A-] is the concentration of the conjugate base (in this case, bicarbonate ion, H\(CO_{3}\)-), and [HA] is the concentration of the weak acid (in this case, carbonic acid, \(H_{2}\)\(CO_{3}\)).

The pKa of carbonic acid is 6.35, and the concentrations of H\(CO_{3}\)- and \(H_{2}\)\(CO_{3}\) can be calculated using the initial amounts of NaH\(CO_{3}\)  and Na2\(CO_{3}\)and the stoichiometry of the reaction:

[H\(CO_{3}\)-] = [NaH\(CO_{3}\)] = 0.35 mol / (0.35 mol + 0.50 mol) = 0.411 M

[\(CO_{2}\) = [\(H_{2}\)\(CO_{3}\)] = [NaH\(CO_{3}\)] - [H\(CO_{3}\)-] = 0.35 M - 0.411 M = -0.061 M

(Note: The negative concentration of \(CO_{2}\) is due to the fact that it is in equilibrium with dissolved carbon dioxide gas, which can escape from the solution.)

Plugging these values into the Henderson-Hasselbalch equation, we get:

pH = 6.35 + log(0.411 / (-0.061))

pH = 9.17

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The decay constant for the radioactive isotope in this problem is approximately 0.069\(h^-^1\).

The activity of a radioactive isotope is the rate at which it decays, and is measured in becquerels (Bq). The activity of a sample of radioactive material decreases over time as the number of radioactive nuclei in the sample decreases due to radioactive decay.

The rate of radioactive decay is described by the first-order rate law, which relates the rate of decay to the number of radioactive nuclei present in the sample. The rate constant (λ) for radioactive decay is a characteristic property of the isotope and is related to its half-life (t1/2) by the equation:

t1/2 = ln(2)/λ

where ln(2) is the natural logarithm of 2, which is approximately 0.693.

To find the decay constant for the radioactive isotope in the given problem, we can use the following equation:

A = A0 e^(-λt)

where A is the activity at time t, A0 is the initial activity, and t is the time elapsed since the initial measurement.

Substituting the given values into this equation, we get:

80.2 Bq = 114 Bq e^(-λ(3 h 50 min))

Converting the time elapsed to hours, we get:

t = 3.833 h

Substituting this value, we get:

80.2 Bq = 114 Bq e^(-λ(3.833 h))

Dividing both sides by 114 Bq, we get:

0.704 = e^(-λ(3.833 h))

Taking the natural logarithm of both sides, we get:

ln(0.704) = -λ(3.833 h)

Solving for λ, we get:

λ = -ln(0.704)/3.833 h

λ ≈ 0.069 h^-1

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Answer:

A. Because you have to simplify

Answer:

decomposition

Explanation:

i dont cap

The given statement "organic chemistry is study of chemistry of compounds which contain primarily carbon and hydrogen" is true. Because, Organic chemistry is the study of compounds which contain primarily carbon and hydrogen due to the unique properties and bonding behavior of carbon.

Carbon has the ability to form stable covalent bonds with itself and other elements, allowing for the formation of a vast number of organic compounds. These compounds can vary greatly in their structures and properties, providing a rich and diverse field of study.

Carbon atoms have four valence electrons, which allows them to form strong covalent bonds with other atoms, including other carbon atoms, hydrogen, and a variety of other elements. Carbon can form single, double, and triple bonds, as well as branched and cyclic structures, resulting in a wide range of organic compounds with different functional groups and properties.

Furthermore, carbon-based compounds are fundamental to life as they are the building blocks of biological molecules, such as carbohydrates, lipids, proteins, and nucleic acids. Organic chemistry plays a crucial role in understanding the structure, properties, and reactions of these biomolecules, as well as the development of drugs, materials, and technologies.

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The option C. Blood pressure is not a benefit of having the proper amount of fatty acids in your body.

The body stores and uses fats into various forms. They are present in cell membrane providing selective permeability to the cell. They are also used by body to make different sexual hormones responsible for sexual characteristics.

The lipid are also attached on protein or carbohydrates that act as marked for cell recognition. They are also important for blood coagulation and are present in outermost skin layer thus imparting integrity.

The blood pressure however refers to to pressure in the wall of blood vessels during blood flow.

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Answer:

It can use a small amount of sunlight for photosynthesis

Explanation:

Seaweeds are a group of marine plants/algae that grow attached to rocks underwater. However, despite their depth underwater, they still perform photosynthesis, which is a process that requires energy from sunlight.

Seaweeds are able to perform photosynthesis underwater because they are efficient users of sunlight energy. Hence, they require only a small amount of sunlight that penetrates the ocean to perform photosynthesis.

Number of particles : 8.603 x 10²³

Standard conditions for temperature and pressure are used as a reference in certain calculations or conditions

Assumption⇒ Standard Conditions

Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure). At STP, Vm is 22.4 liters/mol.

1 mol = 6.02 x 10²³ particles (atoms, ions, or molecules)

32.0 liters of Helium

\(\tt mol=32:22.4=1.429\)

Number of particles :

\(\tt 1.429\times 6.02\times 10^{23}\\\\=8.603\times 10^{23}\)

Answer:

(1) the surface area of the solute,

(2) the temperature of the solvent,

(3) the amount of agitation that occurs when the solute and the solvent are mixed.

Explanation:

The symmetries that are consistent with a two-dimensional crystal include translation; 1-, 2-, 3-, 4-, and 6-fold rotations; reflection and glide.

Therefore, the answer is option C: Translation; 1-, 2-, 3-, 4- and 6-fold rotations; reflection and glide.

Two-dimensional crystals consist of two-dimensional lattices that can be defined by their symmetries.

They have five fold and higher rotation axes prohibited by the crystallographic restriction theorem.

The seven crystal systems and the fourteen Bravais lattices can be used to classify two-dimensional lattices based on their symmetries. All seven crystal systems have been found in two-dimensional lattices.

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Answer:

4.95L

Explanation:

Using Charle's law equation;

V1/T1 = V2/T2

Where;

V1 = initial volume (L)

V2 = final volume (L)

T1 = initial temperature (K)

T2 = final temperature (K)

According to the question, the following information was given:

V1 = 4.50L

V2 = ?

T1 = 27°C = 27 + 273 = 300K

T2 = 57°C = 57 + 273 = 330K

Using V1/T1 = V2/T2

4.50/300 = V2/330

Cross multiply

300 × V2 = 4.5 × 330

300V2 = 1485

V2 = 1485 ÷ 300

V2 = 4.95L

There are 4.48 × 10-3 moles of \(Na_{2}S_{2}O_{3}\) are required to dissolve 0.35 mol of AgBr in a 1.0 L solution if Ksp for AgBr is 3.3 × 10-13 and Kf for the complex ion \([Ag(S_{2}O_{3})_{2}]^{3-}\).

AgBr dissociates in water, and we can write the reaction as shown below:

\(AgBr = Ag^{+} + Br{-}\)

Since \(Ksp = [Ag^{+}][Br^{-}]\), we can obtain the equilibrium concentrations of \(Ag^{+}\) and \(Br^{-}\) from the Ksp value, using the stoichiometry of the balanced equation. Here, the concentration of  \(Br^{-}\)  is equal to that of \(Ag^{+}\).

Therefore, \(Ag^{+}\) =  \(Br^{-}\)  = √Ksp = √3.3 × 10-13 M\(\sqrt{Ksp} = \sqrt{3.3 * 10^{-13}} M\)  \(5.74 * 10^{-7}\) M. To determine the number of moles of \(Na_{2}S_{2}O_{3}\) required to dissolve 0.35 mol of AgBr in a 1.0 L solution, we must calculate the concentration of \([Ag(S_{2}O_{3})_{2}]^{3-}\) ion first.

Kf = \([Ag(S_{2}O_{3})_{2}]^{3-}\)./(\(Ag^{+}\)\([S_{2}O_{3}^{-2}]\))

For \(Ag^{+}\), we use the concentration obtained from Ksp:

\(Ag^{+}\)= \(5.74 * 10^{-7}\) M

Kf =  \(4.7 * 10^{13}\) mol-1L-3

\([Ag(S_{2}O_{3})_{2}]^{3-}\)= Kf × \([Ag(S_{2}O_{3})_{2}]^{3-}\)

=  \(Ag^{+}\)/Kf

\([Ag(S_{2}O_{3})_{2}]^{3-}\)

= (\(5.74 * 10^{-7}\) M)/(\(4.7 * 10^{13}\)  mol-1L-3 × (\(5.74 * 10^{-7}\) M)2)

= \(4.48 * 10^{-3}\) M

To find the number of moles of \(Na_{2}S_{2}O_{3}\) required to dissolve AgBr in 1 L of solution, multiply the concentration of \([Ag(S_{2}O_{3})_{2}]^{3-}\) by the volume of the solution:

\(4.48 * 10^{-3}\)  M × 1 L = \(4.48 * 10^{-3}\) moles \(Na_{2}S_{2}O_{3}\).

\(4.48 * 10^{-3}\) moles of \(Na_{2}S_{2}O_{3}\) are required to dissolve 0.35 mol of AgBr in a 1.0 L solution.

We used the stoichiometry of the balanced equation and the Ksp value to determine the concentration of [Ag+] and [Br-]. Then, we calculated the concentration of \([Ag(S_{2}O_{3})_{2}]^{3-}\). from the Kf value and the [Ag+] value obtained from Ksp.

Finally, we multiplied the concentration of \([Ag(S_{2}O_{3})_{2}]^{3-}\) by the volume of the solution to obtain the number of moles of \(Na_{2}S_{2}O_{3}\) needed to dissolve 0.35 mol of AgBr in a 1.0 L solution.

4.48 × 10-3 moles of \(Na_{2}S_{2}O_{3}\) are required to dissolve 0.35 mol of AgBr in a 1.0 L solution if Ksp for AgBr is  \(3.3 * 10^{-13}\) and Kf for the complex ion \([Ag(S_{2}O_{3})_{2}]^{3-}\) is \(4.7 * 10^{13}\)  mol-1L-3.

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Answer:

20 electrons

A neutral atom with atomic number 20 will have 20 electrons.

The atomic number is, by definiton, the number of protons in an atom's nucleus but for a neutral atom it's also equal to the number of electrons. Each element has a different, unique number of protons that determines its identity.

Explanation: