Calculate the concentration (g/l and %) of molecular, deprotonated, and protonated in a tank of water containing solution x 5x10(-4)m, given the ph of 6.5 and pka = 1.87.

Answer:pp

Explanation:

Answer:

The time you will get to Atlantic City is 3 pm

Explanation:

Given;

speed limit, v = 50 km/h

distance to be traveled, d = 150km

The time of the motion is given as;

time = distance / speed

t = (150 km) / (50 km/h)

t = 3 hours

Thus, if you leave your home at noon, the time you will get to Atlantic City is given as;

time to get home = 12 pm + 3hours = 3 pm

Therefore, the time you will get to Atlantic City is 3 pm

Answer: A mole is a chemical unit to measure mass of substance.

Explanation:

A mole can be defined as 6.02214076 × 1023 of atoms, ions, molecules and others. A mole is the total amount of discrete entity within a substance present in the form of atoms, ions, and molecules. As atoms, ions, molecules are small entities within any substance so it is necessary to measure each of them and recognize them so the scientists development the concept of mole. It is the convenient unit of measurement because of the presence of greater number of molecules, atoms, and ions present in any substance.

Answer:

The mole is an SI unit used to measure the amount of any substance. One mole is exactly 6.02214076×10 23 particles.

Explanation:

The concept of the mole is important for scientists because it means that one mole of any element has exactly the same number of atoms as one mole of any other element. This information allows chemists to count atomic particles for even very complex chemistry formulas and reactions.

2.745 moles of lead will react with 5.49 moles of fluorine to produce 2.745 moles of lead(IV) fluoride, according to the balanced equation.

What is Balanced Chemical Equation?

A balanced chemical equation is a written representation of a chemical reaction, with the number and type of atoms on both sides of the equation being equal. This means that the mass and charge are conserved in a chemical reaction.

A balanced chemical equation contains the reactants on the left side of the equation and the products on the right side, separated by an arrow indicating the direction of the reaction. The coefficients in front of the chemical formulas indicate the number of molecules or moles of each reactant or product involved in the reaction.

The balanced chemical equation for the reaction between lead and fluorine to form lead(IV) fluoride is:

1 Pb + 2 F₂ → 1 PbF₄

According to the equation, it takes 1 mole of lead (Pb) to react with 2 moles of fluorine (F₂) to produce 1 mole of lead(IV) fluoride (PbF₄).

If 5.49 moles of fluorine react, we need half as many moles of lead, since the mole ratio of lead to fluorine is 1:2. Therefore, the amount of lead required is:

5.49 moles F₂ × (1 mole Pb / 2 moles F₂) = 2.745 moles Pb

So 2.745 moles of lead will react with 5.49 moles of fluorine to produce 2.745 moles of lead(IV) fluoride, according to the balanced equation.

Learn more about Balanced Chemical Equation from given link

https://brainly.com/question/29367108

#SPJ1

Answer:

hydrogen and cloride + hydrogen

Answer:

130.68 × 10²³ atoms

Explanation:

Given data:

Number of moles of Rn = 21.7 mol

Number of atoms = ?

Solution:

Avogadro number:

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.  6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ atoms

21.7 mol × 6.022 × 10²³ atoms / 1mol

130.68 × 10²³ atoms

To generate 48.0 L of H2 gas at 0.888 atm and 32°C, approximately 30.3 grams of CaH2 are needed according to the given conditions and calculations using the Ideal Gas Law and stoichiometry.

To determine the grams of calcium hydride (CaH2) required to produce 48.0 L of hydrogen gas at a pressure of 0.888 atm and a temperature of 32°C, we employ the Ideal Gas Law. Firstly, converting the temperature from Celsius to Kelvin yields 305.15 K. Using the equation PV = nRT, where P represents pressure, V signifies volume, n denotes moles, R represents the ideal gas constant (0.0821 L*atm/(mol*K)), and T signifies temperature in Kelvin.

Rearranging the equation to solve for n, we find n ≈ 1.44 moles. By employing the balanced chemical equation, we determine that 0.72 moles of CaH2 are required, as 1 mole of CaH2 produces 2 moles of H2. Finally, using the molar mass of CaH2 (approximately 42.1 g/mol), we find that the quantity of CaH2 needed is roughly 30.3 grams.

Learn more about gas  here;

https://brainly.com/question/24719118

#SPJ11

Answer:leeeeeee

Explanation:

The correct statements about oxidative phosphorylation are: a, b and e.

Oxidative phosphorylation is an aerobic process since oxygen is needed as the last electron acceptor in the electron transport chain.

ATP synthase uses the proton motive force produced by the electron transport chain to make ATP.

The inner mitochondrial membrane and the matrix of the mitochondria both experience oxidative phosphorylation. While ATP production takes place in the matrix, the electron transport chain is located in the inner mitochondrial membrane.

Learn more about oxidative phosphorylation, here:

https://brainly.com/question/29104155

#SPJ4

The mass of the second isotope is 49.08 u.

Average atomic mass is 45.737 u, while the abundance of isotope 1 is 40.149 u.

? isotope 2?

Process

1.- Determine the isotope 2 abundance: abundance isotope 1 plus abundance isotope 2 equals 100%

100 = 37.46 + abundance isotope 2

Amount isotope 2 equals 100 - 37.46 Amount isotope 2 equals 62.54

2.- Determine the mass of isotope 2. Average atomic mass = (abundance x mass isotope 1) + (abundance x mass isotope 2) 45.737 = (0.3746 x 40.149) + (62.54 x mass isotope 2) Mass isotope 2 = [45.737 - (0.3746 x 40.149)]

62.54 mass isotope 2 equals [45.737 - 15.0398] 62.54 mass isotope 2 equals 30.6972 62.54 mass isotope 2 equals 0.4908 x 100 mass isotope 2 equals 49.08 u

Isotopes are members of the same family of elements as that element but have varying numbers of neutrons. The Periodic Table's atomic number of an element is determined by the number of protons it contains. The atomic number 6 of carbon, for instance, has six protons.

Any of two or more types of chemical element atoms that have the same atomic number and essentially the same chemical behavior, but different atomic masses or mass numbers and different physical qualities

Uranium-235, uranium-238, tritium (hydrogen-3), chlorine-36, and carbon-14 are a few examples of radioactive isotopes. There are certain isotopes that have exceptionally lengthy half-lives (in the order of hundreds of millions of years). Stable nuclides or stable isotopes are the terms used to describe these isotopes.

To learn more about isotope from the given link:

brainly.com/question/11680817

#SPJ4

Answer:

You can predict the charge of an ion by looking at its group number on the periodic table.

Explanation:

check first atomic radius then find the ion formation and also in periodic table they indicate

According to John Dalton, atoms are tiny, unbreakable particles without any internal organization.

Protons, neutrons, & electrons are three incredibly small subatomic particles that make up an atom. The nucleus, which is made up of protons and neutrons, sits in the middle of an atom, and an electron cloud flies around it.

The typical radius of an atom is 0.1 nm. An average pin head may hold about 5 million hydrogen. An atom's nucleus is 10,000 orders of magnitude smaller than the nucleus itself. The nucleus of an atom would be the diameter of a garden pea if it were the size as Wembley Stadium.

To know more about Atoms visit:

https://brainly.com/question/1566330

#SPJ4

The 4s orbitals are filled first because, according to our theory, they have a lower energy than the 3d orbitals. We are aware that the 4s electrons are lost first when an atom ionizes.

The highest energy level electrons that are lost first are those that are most far from the nucleus' influence. A higher energy must therefore exist in the 4s orbital than in the 3d orbitals.

The electron is a subatomic particle with the symbol e or with an electric charge of one elementaryly negative charge. Due to their lack of known components or substructure, electrons, which are part of the first generation of the lepton particle family, are typically considered to be elementary particles.

Learn more about electron here

https://brainly.com/question/18914648

#SPJ4

Answer:

22.44 grams of HgO is equal to 0.1037 moles of HgO.

Explanation:

To convert grams of HgO to moles, you need to use the molar mass of HgO, which is 216.59 g/mol.

To calculate the number of moles of HgO in 22.44 grams, you can use the following formula:

moles = mass / molar mass

Substituting the values:

moles = 22.44 g / 216.59 g/mol

moles = 0.1037 mol

Here are the  answers to the questions:1. True2. True3. True4. True.

Determine whether the following statements are true or false.  electron sea exists in metallic bonds true ( )? or false ( )?

True

In a metallic bond, the valence electrons of the metal atoms form a "sea" of electrons, which surrounds the nuclei of the metal atoms.

The outer electrons of the atoms become delocalized and can flow through the crystal, linking the metal atoms in a lattice structure.

Thus, electron sea exists in metallic bonds.2. Binding energy in two-atom model is defined as the maximum potential energy that two atoms can have. true ( )? or false ( )?Answer: True.

The maximum potential energy that two atoms can have is defined as the binding energy in two-atom models.

Therefore, this statement is true.3. In two-atom mode, the behavior of the potential energy is similar to that of harmonic oscillator (spring motion) when the interatomic distance is near the equilibrium interatomic distance. true ( )? or false ( )?Answer: True.

The potential energy of a two-atom system varies with the interatomic distance. The behavior of potential energy is similar to that of harmonic oscillator (spring motion) when the interatomic distance is near the equilibrium interatomic distance. Therefore, this statement is true.4.

The most common chemical bonds for ceramic materials are covalent and metallic bonds, and these bonds make ceramic materials to be brittle. true ( )? or false ( )?Answer: True

Ceramic materials are brittle due to the types of chemical bonds they possess. Covalent and metallic bonds are the most common types of chemical bonds found in ceramic materials. These bonds make the materials hard, stiff, and brittle. Therefore, this statement is true.

So, the main answers to the questions are True, True, True, True.

To know more about potential energy visit:

brainly.com/question/24284560

#SPJ11

The two-sided confidence interval is (87.85 ≤ μ ≤ 93.11) , with 87.85 being the lower level and 93.11 being the upper level.

The amount of product you actually get after doing an experiment is known as the experimental yield. Calculating the % yield will show you how much of the theoretical yield you actually achieved in a particular experiment. The quantity of pure and dry product produced in a chemical reaction is known as the reaction yield (absolute yield). The relative or percentage yield (%) is typically determined in order to assess the effectiveness of a chemical process in organic synthesis.

The percent yield can be calculated by applying the following formula:%yield = (actual yield/theoretical yield) x 100.

Step-by-step explanation:

Given the data:

91.6, 88.75, 90.8, 89.95, 91.3

Mean, m = Σx / n

n = sample size = 5

Mean = 452.4 / 5 = 90.48

Standard deviation, σ = 3

Zcritical at 95% = 1.96

Confidence interval :

Mean ± Error margin

Error margin = Zcritical*σ/sqrt

Error margin = 1.96 * 3/sqrt(5)

Error margin = 2.630

Lower boundary : 90.48 - 2.630 = 87.85

Upper boundary : 90.48 + 2.630 = 93.11

(87.85 ; 93.11)

To know more about Yield of a Chemical visit:

https://brainly.com/question/14408642

#SPJ4

The interface engineering of MoS2/Ni3S2 heterostructures plays a crucial role in achieving highly enhanced electrochemical overall-water-splitting activity.

The heterostructure consists of two different materials, MoS2 and Ni3S2, which are strategically combined to promote efficient water splitting into hydrogen and oxygen gases.

Here are some key aspects of interface engineering in MoS2/Ni3S2 heterostructures for enhanced electrochemical overall-water-splitting activity:

Band Alignment: The energy band alignment between MoS2 and Ni3S2 is critical for efficient charge transfer and separation at the interface. Proper band alignment ensures that photo-generated electrons and holes in MoS2 can be effectively transferred to the Ni3S2 catalyst for the respective hydrogen evolution reaction (HER) and oxygen evolution reaction (OER).

Charge Transfer and Transport: Interface engineering aims to maximize the charge transfer kinetics between MoS2 and Ni3S2. This can be achieved by optimizing the interfacial contact and ensuring a large interfacial area to facilitate efficient charge transfer and transport across the heterostructure.

Catalytic Activity: Ni3S2 is a well-known catalyst for the HER, while MoS2 has been extensively studied for its OER activity. By combining these materials in a heterostructure, the overall water-splitting activity can be significantly enhanced. Interface engineering can further enhance the catalytic activity by promoting synergistic effects between MoS2 and Ni3S2, leading to improved reaction kinetics and overall performance.

know more about  interface engineering here

https://brainly.com/question/28474823#

#SPJ11

Answer:

The boiling point of the halogens increases as you go down the group. The halogens exist as diatomic molecules, with both atoms sharing an electron to completely fill the outer shell. The increase in boiling (and melting point) can be attributed to the increase in intermolecular forces (van der Waals).tion:

Answer: The molar mass and molecular weight of 4Fe is 223.38.

It will take __6.4 years.___ years to double your money at a 11% rate of interest compounded annually.

Compounded interest is aa type of interest that allows investors to earn interest on both their initial principal and any interest earned. The compounding frequency refers to the number of times per year that interest is paid out or credited to an account. Annual compounding, which is once per year, is a common compounding frequency. To double your money in annual compounded interest, use the rule of 72, which says that 72 divided by the interest rate equals the number of years it takes to double your money. Using this formula, we have 72/11, which equals about 6.4 years. Thus, it will take approximately 6.4 years to double your money at an 11% rate of interest compounded annually.

Learn more about Compound interest  from the given link:
https://brainly.com/question/3989769

#SPJ11

Option( A) is the correct answer.

A chemical reaction in which energy is released is exergonic.

Exergonic reactions are defined as chemical reactions in which the change in free energy is negative in chemical thermodynamics (there is a net release of free energy). If the system is closed and the end and beginning temperatures match, this suggests a spontaneous response. The Gibbs free energy is employed for processes that occur in a closed system at constant pressure and temperature, whereas the Helmholtz energy is significant for processes that occur at constant volume and temperature. The second rule of thermodynamics states that any reaction that takes place at a steady temperature without the addition of electrical or photon energy is exergonic. Cellular respiration is one illustration.

To know more about exergonic energy:

https://brainly.com/question/282549

#SPJ4

The balanced chemical equation for the reaction between zinc (Zn) and hydrochloric acid (HCl) is:

Zn + 2HCl → ZnCl₂ + H₂From the equation, we can see that one mole of zinc reacts with two moles of hydrochloric acid. Therefore, the number of moles of HCl in 50 cm³ of 2.0 mol/dm³ hydrochloric acid can be calculated as follows:n(HCl) = c × V = 2.0 mol/dm³ × 50 cm³ ÷ 1000 cm³/dm³ = 0.1 molThis means that 0.1 mol of zinc will react with the 50 cm³ of 2.0 mol/dm³ hydrochlmolaroric acid.The   of zinc is 65.38 g/mol. Therefore, the mass of zinc that will react with 0.1 mol of hydrochloric acid is:m(Zn) = n(Zn) × M(Zn) = 0.1 mol × 65.38 g/mol = 6.54 gTherefore, the maximum mass of zinc that will react with 50 cm³ of 2.0 mol/dm³ hydrochloric acid is 6.54 g.This mmasseans that 0.1 mol of zinc will react with the 50 cm³ of 2.0 mol/dm³ hydrochloric acid.The molar mass of zinc is 65.38 g/mol. Therefore, the mass of zinc that will react with 0.1 mol of hydrochloric acid is:m(Zn) = n(Zn) × M(Zn) = 0.1 mol × 65.38 g/mol = 6.54 gTherefore, the maximum mass of zinc that will react with 50 cm³ of 2.0 mol/dm³ hydrochloric acid is 6.54 g.



learn more about balanced   here:

https://brainly.com/question/27154367


#SPJ11

Answer:

D

Explanation:

You need both, independant and dependant variables for a hypothesis.

Answer:

12

Explanation:

Answer:

1.168888g/ml

Explanation:

2.63 divided by 2.25 gives as 1.1688888

Answer: Matter cannot be created or destroyed in chemical reactions.

Explanation: This is the law of conservation of mass. In every chemical reaction, the same mass of matter must end up in the products as started in the reactants. Balanced chemical equations show that mass is conserved in chemical reactions.

Answer:

\(\boxed {\boxed {\sf 10.3 \ moles \ of \ ammonia}}\)

Explanation:

To convert from molecules to moles, we must Avogadro's Number.

This number is how many particles (atoms, molecules, ions, etc.) in 1 mole of a substance. In this case, it is molecules of ammonia in 1 mole of ammonia.

\(6.022*10^{23} \ molecules \ NH_3 / mol \ NH_3\)

Use Avogadro's number as a ratio.

\(\frac{6.022*10^{23} \ molecules \ NH_3}{1 \ mol \ NH_3}}\)

Multiply by the given number of ammonia molecules (6.21*10²⁴)

\(6.21*10^{24} \ molecules \ NH_3 *\frac{6.022*10^{23} \ molecules \ NH_3}{1 \ mol \ NH_3}}\)

Flip the fraction so the molecules of ammonia can cancel out.

\(6.21*10^{24} \ molecules \ NH_3 *\frac{1 \ mol \ NH_3}{ 6.022*10^{23} \ molecules \ NH_3}}\)

\(6.21*10^{24}*\frac{1 \ mol \ NH_3}{ 6.022*10^{23}}\)

Multiply to make 1 fraction.

\(\frac{6.21*10^{24} \ mol \ NH_3}{ 6.022*10^{23}}\)

Divide.

\(10.31218864 \ mol \ NH_3\)

The original measurement of molecules had 3 significant figures (6,2 and 1). Therefore we must round our answer to 3 sig figs.

For the answer we found, 3 sig figs is the tenth place. The 1 in the hundredth place tells us to leave the 3 in the tenth place.

\(10.3 \ mol \ NH_3\)

There are about 10.3 moles of ammonia in 6.21*10²⁴ molecules.

Consider the following equilibrium:

4NH₃ (g) + 3O₂ (g) ⇄ 2N₂ (g) + 6H₂O (g) + 1531 kJ

The given statement is True, because

According to Le Ch's Principle:

Systems that have attained the state of chemical equilibrium will tend to maintain their equilibrium state.

External factors such as the addition of products and reactants result in the disruption of the equilibrium state.

we expect the system to shift to the direction that offsets the change in concentration.

This results in the state of chemical equilibrium to be reestablished.

Hence, The statement is true,

To learn more about equilibrium here

brainly.com/question/3920294

#SPJ4