Calculate the pH of a solution having the following ion concentrations at 298 K. [H+] = 4.6 × 10^-2 M

The 2 isotopes of Nitrogen are Nitrogen-14  and Nitrogen-15 .

Isotopes are atoms with the same number of protons and different number of neutrons. Even though they have nearly identical chemical properties, they differ in mass which affects their physical properties.

As you know, the atomic number of nitrogen is = 7.

Isotopes are forms of elements that have the same atomic number (Z) but different mass numbers because they have different numbers of neutrons (A).

Now,

Atomic number = number of protons

Isotopes have the same atomic number.

Atomic number for both isotopes = 7. However, the mass numbers of the two isotopes are different.

In other words, the mass number = the number of (protons + electrons).

Therefore, nitrogen-14 has a mass number of 14 and nitrogen-15 has a mass number of 15.

To know more about isotopes refer to:

https://brainly.com/question/14220416

#SPJ1

Both the left and right sides of the brain are responsible for controlling the motions of the left and right sides of the body, respectively.

To learn more about brain refer to:

https://brainly.com/question/1247675

#SPJ1

Answer: HCO3- and HPO4 2-

Explanation: the electrolytes work as a buffer which lies in 7 the less than 7 would be acidic and more than 7 would be basic. So they work as a buffer to maintain pH of 7.

Fluorine-19 is the only stable isotope of fluorine, and it has 10 neutrons. Fluorine is depicted as \(F_2\) normally.

The periodic table's most reactive chemical element is fluorine. There is just one naturally occurring stable fluorine isotope Fluorine-19.

The 19 in Fluorine-19 is the mass number which is the addition of the number of protons and neutrons present in the nucleus of the fluorine atom. 9 protons and electrons and 10 neutrons are present in the atom.

The valency of fluorine is 1- as it has 7 electrons in the outermost shell and requires only 1 electron to complete the octet state and become stable. Thus, it shares 1 electron with another fluorine atom and becomes a stable diatomic molecule as \(F_2\).

Learn more about Fluorine-19 here:

https://brainly.com/question/8470183

#SPJ9

Answer:

When vinegar and baking soda are combined a mixture is produced which is carbon dioxide. A gas is released.

Explanation:

Answer:

1. 11

2.45

3.54

5.11

Hope this helps if im not wrong

Answer:

yes

Explanation:

Answer:

A.) Change only the coefficients

Explanation:

An equation is balanced when there is an equal quantity of each type of element on both sides of a reaction. When balancing an equation, the only way to manipulate the amounts of each element is by changing the coefficient values. The coefficients alter the amount of each molecule in the reaction.

The subscripts cannot be altered. If you were to change the subscripts, you would be altering the amount of atoms in a particular molecule.

The stage that this most accurately describes while using the PCR is the initiation of DNA synthesis, also known as the denaturation stage.

In the denaturation stage of Polymerase Chain Reaction (PCR), the double-stranded DNA template is heated to a high temperature to separate the two complementary strands and create single-stranded DNA. The denaturation stage is the first step in the PCR cycle.

In this stage, the heat-stable DNA polymerase denatures the DNA and the primers anneal to the complementary single-stranded template. This marks the beginning of the extension stage, where the DNA polymerase synthesizes new complementary strands along the template DNA.

Learn more on denaturation stage here: https://brainly.com/question/27493294

#SPJ1

When an electron moved from the ground state to the excited state it gained energy and passed to a high level of energy.

An electron shell is a layer of the electrons that contains a given amount of energy and may pass to higher levels by excitation which also read to change the orbital from the ground state to the excited state.

In conclusion, when an electron moved from the ground state to the excited state it gained energy and passed to a high level of energy.

Learn more about electron energy states here:

https://brainly.com/question/81112

#SPJ1

Answer:

C₃H₄O₃

Explanation:

From the question given above, the following data were obtained:

Mole of carbon (C) = 3.407 mol

Mole of Hydrogen (H) = 4.53 mol

Mole of oxygen (O) = 3.406 mol

pseudoformula of ascorbic acid =?

The pseudoformula of ascorbic acid can be obtained as follow:

C = 3.407 mol

H = 4.53 mol

O = 3.406 mol

Divide by the smallest:

C = 3.407 / 3.406 = 1

H = 4.53 / 3.406 = 1.33

O = 3.406 / 3.406 = 1

Multiply through by 3 to express in whole number

C = 1 × 3 = 3

H = 1.33 × 3 = 4

O = 1 × 3 = 3

Therefore, the pseudoformula of ascorbic acid is C₃H₄O₃

Answer:

Explanation:

Electronic configuration = ns²( n-1 ) d¹⁰np³

Valance electron is the electron in the outermost shell . Here outermost shell is n and total number of electron in it is 2 + 3 = 5 ( 2 electron in s and 2 in p subshell ) . Therefore no of valance electron is 5 .

Since the car is being acted upon by balanced forces, the car is at rest. as the forces are being balanced.

Force is defined as a cause which is capable of changing the motion of an object. It can cause an object which has mass to change it's velocity. It is also simply a push or a pull . It has both magnitude as well as direction.Hence, it is a vector quantity.

It has SI units of Newton and is represented by'F'.Newton's second law states that force which acts on an object is equal to momentum which changes with time. If mass of object is constant, acceleration is directly proportional to net force acting on an object.

The concepts which related to force are thrust and torque .Thrust increases the velocity of an object and torque produces change in rotational speed of an object.

Learn more about force,here:

https://brainly.com/question/28875770

#SPJ6

1. The constituent gases of air are:

2. The surrounding air is not seen with the eyes because it is transparent. Air molecules are not visible to the na-ked eye, and they do not scatter or absorb visible light significantly. Therefore, air appears colorless and transparent.

3. To prove that air supports burning, you can perform an experiment with a burning candle. Place a glass jar or bell jar over a lit candle, ensuring that the jar is airtight. As the candle burns, it consumes oxygen from the air inside the jar. Eventually, the candle flame will go out due to the lack of oxygen, proving that air (specifically oxygen) is necessary for burning.

4. To show that air occupies space, you can perform a simple experiment using a plastic bottle or syringe. Fill the bottle or syringe with water, ensuring there are no air bubbles. Then, cover the opening tightly and try to compress the air inside. You will find that it is not possible to compress the air significantly, indicating that air occupies space.

5. To prove that air has weight, you can use a sensitive balance or scale. Weigh an airtight container or balloon, and then fill it with air. The weight of the container or balloon with the added air will be greater than its initial weight, demonstrating that air has weight.

6. Air is useful to us in various ways. Three points highlighting the importance of air are:

7. Three properties of air include:

Air exerts force in various ways. For example, air pressure allows objects like airplanes to fly by providing lift. Air resistance or drag opposes the motion of objects moving through the air, creating a force that can affect their speed and trajectory.

8. Four effects of air pollution include:

9. Causes of pollution:

10. Two control measures for air pollution include:

Learn more about air on https://brainly.com/question/15215203

#SPJ1

(a) To calculate the mass of sulfuric acid in the truck, we can multiply the volume of sulfuric acid by its density. Given that the truck carries 34,000 liters of sulfuric acid and the density of sulfuric acid is 1.84 kg/L.

we can use the formula:

Mass (m) = Volume (V) × Density (D)

Plugging in the given values:

Volume (V) = 34,000 L Density (D) = 1.84 kg/L

m = 34,000 L × 1.84 kg/L

m ≈ 62,560 kg (rounded to the nearest whole number)

Therefore, the mass of sulfuric acid in the truck is approximately 62,560 kg.

(b) The amount of sulfuric acid in the truck is already given in the question as 34,000 L (volume).

For more questions on: volume

https://brainly.com/question/27100414

#SPJ11

(a) To find the mass of sulfuric acid in the truck, we need to use the formula:
mass = density x volume

The volume of sulfuric acid in the truck is given as 34,000 L. The density of sulfuric acid is 1.84 kg/L. Therefore, the mass of sulfuric acid in the truck is:

mass = 1.84 kg/L x 34,000 L = 62,560 kg
So there are 62,560 kg of sulfuric acid in the truck.
(b) To find the amount of sulfuric acid in the truck, we need to use the formula:
amount = mass / molar mass
The molar mass of sulfuric acid is 98.08 g/mol. To convert the mass from kg to g, we need to multiply by 1000. Therefore, the amount of sulfuric acid in the truck is:
amount = 62,560,000 g / 98.08 g/mol = 636,816.3 mol
So there are 636,816.3 moles of sulfuric acid in the truck.

For more question on  sulfuric acid

https://brainly.com/question/10220770

#SPJ11

This equation implies that there are two protons on the left side and two protons on the right side.

NaHSO3 + H2O → Na+ + HSO3- + OH-

H2SO3 + 2 H2O → H3O+ + HSO3- + OH-

1.4 x 10-2 H3O+ + 6.5 x 10-8 HSO3- → 1.4 x 10-2 OH- + 6.5 x 10-8 H3O+

NaHSO3  ->  Na+ + HSO3- (Ka1 = 1.4 x 10-2)

HSO3-  ->  H+ + SO32- (Ka2 = 6.5 x 10-8)

The complete proton balance for the system is:

NaHSO3 + H2O <=> Na+ + H3O+ + HSO3-

HSO3- + H2O <=> H+ + SO32- + H2O

NaHSO3 + H2O <=> Na+ + H3O+ + H+ + SO32-

So the proton balance is:

NaHSO3 + H2O <=> Na+ + 2 H3O+ + SO32-

NaHSO3 + H2O <=> Na+ + 2 H3O+ + SO32-

To learn more about The proton balance for the system refer to:

https://brainly.com/question/12449324

#SPJ1

Answer:

Explanation:

We can see that this picture can be used to show Ohm's Law graphically so it illustrates Ohm's  Law.

According to Ohm's Law electric current is directly proportional to voltage and inversely proportional to resistance.

Mathematically, V ∝ I,

or                       V=IR,

where,       V  ⇒ voltage difference between two points,

                 I  ⇒ current flowing through the resistance,

                 R ⇒ proportionality constant or resistance.

According to the picture voltage ( SI unit Volt ) is supporting the current  ( SI unit Ampier ) to move out from the barrier while the resistor ( SI unit Ohm )is acting as a barrier to its way . As it is satisfying the Ohm's Law it illustrates the relationship between voltage, current, and resistance.

The temperature increase from 20 °C to 46 °C indicates that the reaction between zinc and copper sulfate solution is exothermic, with heat being released into the surroundings.

In the given reaction between zinc and copper sulfate solution, the temperature change can provide insights into the type of heat change occurring during the reaction. Based on the provided information, the initial temperature of the copper sulfate solution was 20 °C, and the final temperature of the mixture after the reaction was 46 °C.

The temperature increase observed in this reaction indicates an exothermic heat change. An exothermic reaction releases heat energy into the surroundings, resulting in a temperature rise. In this case, the reaction between zinc and copper sulfate solution is exothermic because the final temperature is higher than the initial temperature.

During the reaction, zinc displaces copper from copper sulfate to form zinc sulfate and copper metal. This displacement reaction is known as a single displacement or redox reaction. Zinc is more reactive than copper and therefore replaces copper in the compound.

The formation of new chemical bonds during the reaction releases energy in the form of heat. This energy is transferred to the surroundings, leading to an increase in temperature. The heat released is greater than the heat absorbed, resulting in a net increase in temperature.

The exothermic nature of this reaction can be explained by the difference in bond energies between the reactants and products. The breaking of bonds in the reactants requires energy input, while the formation of new bonds in the products releases energy.

In this case, the energy released during the formation of zinc sulfate and copper metal is greater than the energy required to break the bonds in copper sulfate and zinc.

For more such question on temperature visit:

https://brainly.com/question/4735135

#SPJ8

Answer:

III, I, II

Explanation:

The correct order is a) I, II, III.

Compounds I and II are both alkanes, which are non-polar compounds that do not dissolve well in water, which is a polar solvent. Alkanes are generally insoluble in water. Compound III is an alcohol, which is a polar compound that is more soluble in water than non-polar compounds like alkanes. Therefore, compound III is more soluble in water than compounds I and II.

Answer:

The porosities in dental materials can be of merit and not merit since some dental materials need to be porous in order to reduce their weight and improve their properties and functions, whereas in those (which are the majority) porosities are not Merit, see the properties of the material, the function and can even influence dental rehabilitation.

An example of this is the use of vitreous ionomers, which is a dental material, where when it is spatulated it remains porous, it can give recurrence of infectious caries, since its permeability increases, the best cariogenic microorganisms are filtered and porosity works as a retentive site for these microorganisms that make up the dental biofilm.

In summary, the world of dental materials is very wide, some are resins, other cements, others have metallic claims, etc. To say that the presence of porosity is merit or demerit would be ideal because for some materials this is favorable and for others unfavorable since they are very versatile, with different qualities, different degrees of porosity, different molecules, different coefficients of thermal expansion, some do not set, others do not, some are light-cured, others do not, some withstand more mechanical forces and have more elastic modulus and less porosity, while others do not, and thus with many more variables.

Explanation:

In the manufacture of dental materials, much attention is always paid to what the manufacturer indicates in these indications that come on the reverse side of the material or on a paper inside the material container.

This is important to know, because the manufacturer is the one that indicates the mode of use and working time according to the trademark and the chemical composition of the dental material.

That a dental material in its manufacture is more or less porous, makes its density, weight and volume possibly be affected, there are materials that seek to increase porosity for a certain purpose, while others seek the opposite, depending on the function that is applied, will have more or less pores.

The example we gave above about the vitreous ionomer is an example that indicates that in the case of restorative dental materials where the function is to SEAL the porosity is almost nil, since otherwise it will not seal the cavity that was formed with caries and not the infectious problem would be solved.

On the other hand, in the surgical field of dentistry there are bone grafts or porous macroparticles that are for the purpose of bone replacement, which in order to be integrated need blood vessels that run over these pores, irrigating the area of ​​bone neoformation well, in this case the merit of porosity if necessary and it is essential that they be very porous.

Answer:

a) Base Peak

b) Base Peak

c) Molecular Ion

d) Base Peak and Radical Cation

e) The Parent Ion, Molecular Ion, the Radical Cation and the Base Peak

Explanation:

a) The Base Peak is assigned a relative intensity of 100.

b) The Base Peak is the most intense peak in the mass spectrum.

c) The Molecular Ion Peak represents the original molecule that has only lost an electron.

d) Base Peak and Radical Cation could be/represent a smaller, charged fragment of the original molecule.

e) The Parent Ion, the Molecular Ion, the Radical Cation/ the Base Peak is/represents a positively charged species.

The partial pressure of hydrogen in the collected gas sample is 733.0 mm Hg (calculated by subtracting the partial pressure of water, 17.0 mm Hg, from the total atmospheric pressure, 750.0 mm Hg).

When a gas is collected over water, the presence of water vapor affects the total pressure observed. In this case, the total atmospheric pressure is given as 750.0 mm Hg, and the partial pressure of water vapor at 19.5°C is 17.0 mm Hg.

To determine the partial pressure of hydrogen, we need to subtract the partial pressure of water vapor from the total atmospheric pressure. Partial pressure refers to the pressure exerted by an individual gas component in a mixture. In this scenario, the collected gas is primarily hydrogen, with water vapor being the other component.

By subtracting the partial pressure of water vapor (17.0 mm Hg) from the total atmospheric pressure (750.0 mm Hg), we can find the partial pressure of hydrogen:

Partial pressure of hydrogen = Total atmospheric pressure - Partial pressure of water vapor

Partial pressure of hydrogen = 750.0 mm Hg - 17.0 mm Hg

Partial pressure of hydrogen = 733.0 mm Hg

Therefore, the partial pressure of hydrogen in the collected gas sample is 733.0 mm Hg.

Know more about hydrogen here:

https://brainly.com/question/24433860

#SPJ8

Answer:

Final volume=V₂ = 216.3 mL

Explanation:

Given data:

Initial volume = 120.0 mL

Initial temperature = -12.3 °C (-12.3 +273 = 260.7 K)

Final volume = ?

Final temperature = 197.0 °C (197+273 = 470 K)

Solution:

We will apply Charles Law to solve the problem.

According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.

Mathematical expression:

V₁/T₁ = V₂/T₂

V₁ = Initial volume

T₁ = Initial temperature

V₂ = Final volume  

T₂ = Final temperature

Now we will put the values in formula.

V₁/T₁ = V₂/T₂

V₂ = V₁T₂/T₁

V₂ = 120 mL × 470 K /260.7K

V₂ = 56400 mL.K /260.7K

V₂ = 216.3 mL

If 25.82 mL of 0.0500 M NaOH solution are required to reach the equivalence point of an acid-base titration of 40.0 mL of 7-Up, the number of NaOH required is 0.00126 moles.

The point at which chemically identical amounts of reactants are put together is known as the equivalence point in a chemical reaction.

In other words, during titration, it is the point at which the titrant addition is sufficient to totally neutralize the analyte solution. The number of moles of a solution with an unknown concentration is equal to the number of moles of a titrant, or standard solution. Because it is a point where the amount of acid and base required to neutralize a solution is equal, it is often referred to as the stoichiometric point. It should be noted that the acid to base ratio need not be 1:1. The balanced acid-base chemical equation explains this acid-base ratio. For this, indicators might be used, for example, phenolphthalein or methyl orange.

The reaction between citric acid and NaOH is,

H₃C₆H₅O₇(aq) + 3NaOH(aq) →   Na₃C₆H₅O₇(aq) + 3H₂O(l)

According to the formula,

M = \(\frac{n}{V}\)

where,

M is the molarity,

n is the number of moles and,

V is the volume(L)

For NaOH;

M = 0.0500 M

V = 25.82ml = 0.02582 l

n = M × V

n = 0.00126 moles

To know more about acid-base titration, visit;

https://brainly.com/question/2728613

#SPJ1

Answer:

Assuming the noise remains constant, the total noise for the longer path length, 65 scans should be 0.0005 x 65 = 0.0325 absorbance units. The new reading should be 0.01 absorbance units. The signal to noise ratio (SNR) of the new measurement will be 0.01/0.0325 = 3.08.

Signal averaging decreases the magnitude of the residual noise and increases the SNR. The total noise decreases by the square root of the number of scans, in this case √65 = 8, so for 65 scans, the noise level is 8 times lower than for a single scan.

Explanation:

We have to balance this equation:

___ H₂SO₄ + __ KOH ----> __ K₂SO₄ + __ H₂O

The first step is to determine the number of atoms of each element that we have on both sides of the equation.

___ H₂SO₄ + __ KOH ----> __ K₂SO₄ + __ H₂O

K: 1 K: 2

S: 1 S: 1

H: 3 H: 2

O: 5 O: 5

We have 1 atom of K on the left side of the equation and there are 2 atoms of K on the rigth side of the equation. To balance the number of K atoms we can change the coefficient for KOH and write a 2 there.

___ H₂SO₄ + 2 KOH ----> __ K₂SO₄ + __ H₂O

K: 2 K: 2

S: 1 S: 1

H: 4 H: 2

O: 6 O: 5

We balanced the K. The S atoms are already balanced. Let's focus on H. We have 4 atoms of H on the left and 2 atoms of H on the right side of the equation. We can change the coefficient for H₂O and write a 2 there to get 4 atoms of H on the right side.

___ H₂SO₄ + 2 KOH ----> __ K₂SO₄ + 2 H₂O

K: 2 K: 2

S: 1 S: 1

H: 4 H: 4

O: 6 O: 6

We balanced the H and we also changed the number of O atoms on the right side and also balanced them. The balanced equation is:

H₂SO₄ + 2 KOH ----> K₂SO₄ + 2 H₂O

Answer: H₂SO₄ + 2 KOH ----> K₂SO₄ + 2 H₂O

The pOH of the 0.001 M NaOH solution is approximately 3.

To determine the pOH of a solution, we need to know the concentration of hydroxide ions (OH-) in the solution.

In the case of a 0.001 M NaOH solution, we can assume that all of the NaOH dissociates completely in water to form Na+ and OH- ions. Therefore, the concentration of hydroxide ions in the solution is also 0.001 M.

The pOH is calculated using the equation:

pOH = -log[OH-]

Substituting the concentration of hydroxide ions, we have:

pOH = -log(0.001)

Using a calculator, we can evaluate the logarithm:

pOH ≈ 3

Therefore, the pOH of the 0.001 M NaOH solution is approximately 3.

Know more about  hydroxide ions   here:

https://brainly.com/question/28464162

#SPJ8

The aromatic ring in phenacetin exhibits an AB pattern because it has two mutually coupled nuclei that are unrelated to other protons or whose shift differences is equal to the coupling constant.

Deshielding occurs for the ring protons of benzene due to their larger chemical shift (7.3 ppm vs. 5.6 ppm for the vinylic protons in cyclohexene) and the fact that the magnetic field induced outside of the ring is the same orientation as that of the external field.

Protons are present in benzene at levels of 6–8 ppm.This value is larger than that of the protons in those other hydrocarbon like alkanes & alkenes because of the aromatic ring's deshielding effect.

To know more about protons visit:

https://brainly.com/question/1252435

#SPJ1

Answer:

A. Find a connection between variables

Explanation:

In the scientific method, the first step is to make an observation. To observe means to carefully monitor phenomena with a view to draw general patterns from specific occurrences.

The second step is to draw up a hypothesis; this is a tentative explanation for the observation.

The next step is to perform an experiment to determine the effect of change in one more variables on another variable. The experiment will confirm or disprove the hypothesis.

The last step is to draw a conclusion. In drawing up a conclusion, a scientist finally establishes the relationship between two variables and finds the connection between them.