calculate the ph of the cathode compartment solution if the cell emf at 298 k is measured to be 0.670 v when [zn2 ]= 0.22 m and ph2= 0.96 atm

Explanation:

We can use the combined gas law to solve this problem, which relates the pressure, volume, and temperature of a gas:

(P₁V₁) / T₁ = (P₂V₂) / T₂

where P is the pressure, V is the volume, and T is the temperature.

We can assume that the amount of gas is constant, so we can simplify the equation to:

(P₁/T₁) = (P₂/T₂)

Substituting the given values, we get:

(600 torr / 300 K) = (1000 torr / T₂)

Solving for T₂, we get:

T₂ = (1000 torr x 300 K) / 600 torr

T₂ = 500 K

Therefore, the final temperature of the gas is 500 K.

Answer:

500K

Explanation:

We use Charle's law that states that at a constant pressure the volume of a given mass of a gas varies linearly with absolute temperature of the gas

Answer: Density is 0.39g/ml and will float

Explanation:

Density is mass/volume : 1.95g/5.0ml = 0.39g/ml

This sample will float on water because a object with a density less than 1g/cm3 will float. 1 cubic centimeter equal 1 ml.

Oxidation and reduction are important concepts in chemistry, and they often go hand in hand with redox reactions. Metals that can be oxidized are referred to as reducing agents, whereas those that can be reduced are referred to as oxidizing agents.

The metal that has the greatest tendency to be oxidized is the strongest reducing agent, while the one with the least tendency to be oxidized is the weakest reducing agent. Copper (Cu), cadmium (Cd), and nickel (Ni) are three metals that will be considered. The oxidations and their equilibrium constants are given below:

Cu → Cu2+ + 2 e− [Cu2+] / [Cu]2Cd

→ Cd2+ + 2 e− [Cd2+] / [Cd]2Ni

→ Ni2+ + 2 e− [Ni2+] / [Ni]2

Using the above given equations, equilibrium constants can be determined for these metals:

Cu:  Kc = [Cu2+] / [Cu]2

Cd: Kc = [Cd2+] / [Cd]2

Ni: Kc = [Ni2+] / [Ni]2

The smaller the value of Kc, the more spontaneous the reaction. Hence, the metal with the smallest Kc would be the strongest reducing agent, and the metal with the largest Kc would be the weakest reducing agent. According to the above equations, the metals in order of strength from the strongest to the weakest reducing agent are as follows: Cu, Cd, Ni. Therefore, copper is the strongest reducing agent, cadmium is the second strongest reducing agent, and nickel is the weakest reducing agent.

To know more about spontaneous visit-

https://brainly.com/question/5372689

#SPJ11

Explanation:

To calculate the percent yield, we need to compare the actual yield to the theoretical yield. The theoretical yield is the amount of product that would be obtained if the reaction went to completion based on the stoichiometry of the balanced equation.

First, let's determine the molar mass of CaCO3 (limestone) and CaO (quicklime):

- Molar mass of CaCO3 = 40.08 g/mol (molar mass of Ca) + 12.01 g/mol (molar mass of C) + (3 * 16.00 g/mol) (molar mass of O) = 100.09 g/mol

- Molar mass of CaO = 40.08 g/mol (molar mass of Ca) + 16.00 g/mol (molar mass of O) = 56.08 g/mol

Next, we can calculate the theoretical yield of CaO:

The molar ratio between CaCO3 and CaO is 1:1 according to the balanced equation. Therefore, the mass of CaO produced is the same as the mass of CaCO3 used.

The theoretical yield of CaO is 3.3 × 10^3 g.

Now we can calculate the percent yield:

Percent Yield = (Actual Yield / Theoretical Yield) * 100

Percent Yield = (1 × 10^3 g / 3.3 × 10^3 g) * 100

Percent Yield = 30.30%

Therefore, the percent yield of CaO in this reaction is 30.30%.

The first solution provided by meguelratatouille came close to the correct answer, but erred in assuming that equal moles implies equal mass. The following discussion corrects this mistake.

To determine the percent yield, we must compare the actual yield to the theoretical yield.

Theoretical Yield

From the balanced chemical equation we have:

CaCO3(s) --> CaO(s) + CO2(g)

It is necessary to know the molar mass of CaCO3 and CaO to determine the amount of CaO produced from a given amount of CaCO3:

Molar mass CaCO3 = 100.09 g/mol

Molar mass CaO = 56.08 g/mol

Then, to find the total mass of CaO produced by 3.3 x 10^3 g of CaCO3 reactant, we calculate:

3.3 x 10^3 g CaCO3  
x 1 mol CaCO3 / (100.09 g/mol CaCO3)
x 1 mol CaO / (1 mol CaCO3)
x 56.08 g CaO / (1 mol CaO)
-----------------------------------
1848 g CaO

which we report as 1.8 x 10^3 g CaO after applying significant figures.

Actual Yield

Finally, the percent yield is given by dividing the actual yield by the theoretical yield we just computed:

(1 x 10^3 g) / (1.8 x 10^3 g) x 100% = 55.6% = 56%

metal ore

i got this question before and answered this one correctly trust me its right

Answer:

metal ore

Explanation:

The change in Gibbs free energy for this process is 7400 J/mol. when one mole of a gas is compressed at a constant temperature of 400 k from p = 0.1 bar to p = 10 bar.

To find the change in Gibbs free energy for this process, we need to use the equation ΔG = ΔH - TΔS, where ΔH is the change in enthalpy, T is the temperature, and ΔS is the change in entropy.
Since the gas is being compressed at a constant temperature, there is no change in enthalpy (ΔH = 0). Therefore, we can simplify the equation to ΔG = -TΔS.
To calculate ΔS, we can use the equation ΔS = nR ln(V2/V1), where n is the number of moles of gas, R is the gas constant (8.31 J/mol·K), V1 is the initial volume, and V2 is the final volume.
Since the temperature is constant, we can use the ideal gas law to find the initial and final volumes: V1 = nRT/p1 and V2 = nRT/p2, where p1 and p2 are the initial and final pressures, respectively.
Substituting these values into the equation for ΔS, we get:
ΔS = nR ln(p1/p2)
Plugging in the given values, we get:
ΔS = (1 mol)(8.31 J/mol·K) ln(0.1 bar/10 bar) = -18.5 J/K
Finally, we can calculate ΔG using the equation:
ΔG = -TΔS
Plugging in the given temperature and ΔS, we get:
ΔG = -(400 K)(-18.5 J/K) = 7400 J/mol

To learn more about Energy Here:

https://brainly.com/question/1932868

#SPJ11

Answer:

The Dog

Explanation:

The more mass something has the more kinetic energy it has in it.

Answer:

Applied science is a discipline that is used to apply existing scientific knowledge to develop more practical applications, for example: technology or inventions. In natural science, basic science (or pure science) is used to develop information to explain phenomena in the natural world.

Answer:

• Because engineers apply science and its theories into practical situation

Take an example of;

→ A generator: When creating a generator, electromagnetic induction theorem is applied. [ self and mutual inductance ]

→ A plane: The wings are made in considerance of Bernoulli principle and viscous drag

\(.\)

Perchlorate salts are unusually hazardous primarily because they are toxic and volatile.

Perchlorate salts are unusually hazardous primarily because they are toxic and some are shock-sensitive. Their toxicity can pose a risk to human health and the environment, while their shock-sensitive nature can cause them to react violently upon impact, potentially leading to accidents or explosions. Perchlorate salts are unusually hazardous due to several reasons. Firstly, they are toxic and volatile, meaning they can easily vaporize and become airborne, increasing the risk of inhalation and absorption through the skin. Secondly, some perchlorate salts are shock-sensitive, meaning they can easily detonate or explode when subjected to impact or friction.

Additionally, perchlorate salts are strong bases, which can cause severe chemical burns and damage to tissues and organs upon contact. Finally, they are also water-reactive, which can cause them to release oxygen and hydrogen gas, leading to potential fire and explosion hazards. Overall, the unique combination of these characteristics makes perchlorate salts particularly hazardous and requires careful handling and disposal.

Learn more about Perchlorate salts here: brainly.com/question/8269990

#SPJ11

The quality and safety of water can be determined using spectroscopic and techniques. Using components of interest (such iron and manganese) or by reacting the compound of interest with another compound to produce a color shift, a colorimeter assesses the intensity of a color.

It is typical to put the solution in a cuvette before reading a sample with a colorimeter. These are tiny, rectangular, often plastic containers that fit into the colorimeter's top slot. The spectrophotometer's cuvette should only contain distilled water when calibrating the device. So, distilled water is employed as a blank to exclude the absorbance of substances other than the analyte being measured. The method known as colorimetric analysis compares the color variations of the solution to estimate the concentration of analyte.

To learn more about 'colorimetric' refer to

https://brainly.com/question/20630628

#SPJ4

The atomic radius identifies the average distance between two nuclei of the same element bonded together.

In the periodic table, the larger the group to which the element belongs, the smaller the atomic radius. The groups of the periodic table refer to the columns. So in the first column is group IA and in the last column is group VIIIA.

We are going to classify the elements we are given by the group they belong to and so we can order them according to their increasing atomic radius.

Potassium ---> IA

Calcium--->IIA

Bromine --->VIIA

Arsenic--->VA

Answer:

if my calculation are correct, it's 295 grams

Explanation:

because liters converted to grams is .1=100 so if you take 2.95 times 100, it equals 295

Answer: 13.9

Explanation:

LiOH is a base, so the pOH is given by \(-\log(0.8)=0.0969\).

So, since pOH + pH = 14, the pH is 14-0.0969, which is about 13.9

is the ratio of the equilibrium concentrations of the reactants and products, each raised

In a reversible process at equilibrium, the concentration of reactants and the concentration of products are connected by the equilibrium constant Kc.

When it comes to Kc, there are two factors to keep in mind:

The percentage of product to reactant at equilibrium increases with increasing Kc value.

No matter how much of the products or reactants you start with, the value of Kc for a specific reaction at a specific temperature is always the same.

Explanation:

2NOCl(g) 2NO(g) + Cl 2 (g) H = 77.2 kJ, S = 122 JK 1 at 300 K.

Solution

verified

Verified by Toppr

According to Gibbs-Helmholtz equation

ΔG o =ΔH o −TΔS o =77.2−00×122×10 −3

=28.4kJ=28.4×10 3 J

we know that ΔG

o =−2.303RTlogK c

∴logK c​ = 2.303RT−ΔG o ​ = 2.303×8.314×300

28.4×10 3 ​ =−3.7081

K c​ =antilog(−3.7081)=1.958×10 −4

To learn more about ​ equilibrium refer to

https://brainly.com/question/19340344

#SPJ4

Answer:

name,atomic mass,electrons,protons,same,charge,amount,atomic mass,charge,neutrons,atomic number,atomic mass

The conversion of the Celsius, C in the Fahrenheit , F is as follows :

F = ( 9/5) C + 32

The conversion of the Celsius, C in the Fahrenheit , F is as follows :

F = ( 9/5) C + 32

Where

F =  the temperature in the Fahrenheit

C = the temperature in the Celsius

We can also write the formula is as follows :

F = 1.8 C + 32

The temperature in Celsius scale there are the 100 degrees in between the freezing point or the boiling point of the water as will compared to the 180 degrees temperature in the Fahrenheit scale. That means that 1 °C is equals to the  1.8 °F.

To learn more Fahrenheit here

https://brainly.com/question/17408526

#SPJ4

As part of this general responsibility, the Principal-Investigator (PI) shall do the following: Notify the NIH Office , Conduct initial and ongoing assessments,Ensure that all laboratory personnel are properly trained, Provide necessary medical attention etc.

The responsibilities of PI(Principal Investigator) who conducts recombinant or synthetic nucleic acid molecule research is responsible for full compliance with the NIH Guidelines during the conduct of such research are as follows:

• Notify the NIH Office of Biotechnology Activities (OBA) immediately upon the identification of any significant problems, violations of the NIH Guidelines, or any significant research-related accidents and illnesses.

• Conduct initial and ongoing assessments of the risks associated with the use of recombinant or synthetic nucleic acid molecules and implement appropriate biological safety practices, containment systems, and emergency procedures.

• Ensure that all laboratory personnel are properly trained in handling recombinant or synthetic nucleic acid molecules.

• Establish appropriate procedures for the proper physical containment of recombinant or synthetic nucleic acid molecules.

• Conduct periodic reviews of the research, especially in cases where significant new information regarding the risk to laboratory personnel, public health, or the environment arises.

• Provide necessary medical attention, including immunizations and medical surveillance, to laboratory personnel working with recombinant or synthetic nucleic acid molecules.

• Establish and follow guidelines for the safe disposal of contaminated materials.

To know more about Principal-Investigator, visit:

brainly.com/question/28498432

#SPJ11

For several molecules with the same chemical formula,  the degree of branching influence the relative intermolecular forces is that the branching decreases the band this leads to decrease in the intermolecular attraction of forces.

The intermolecular vander waal force of attraction is directly protional to the surface area of the molecules. if the branching will increases in the molecules than surface area of the molecules will decreases and then the intermolecular forces of attraction will also decreases.

Thus, For several molecules with the same chemical formula,  the degree of branching influence the relative intermolecular forces is that the branching decreases the band this leads to decrease in the intermolecular attraction of forces.

To learn  more about intermolecular forces here

https://brainly.com/question/14794511

#SPJ4

When the second ionization energy of Mg is 1445 kj/mol, then the first ionization energy is less than 1445 kj/mol. Thus, (option b) less than 1445 kj/mol is the correct answer.

Ionization energy is the minimum amount of energy required to remove one mole of electrons from a mole of gaseous atoms or ions in the ground state (at zero degrees Kelvin).

The ionization energy of a given element increases as the nuclear charge or atomic number increases, indicating that the electrons are being held more tightly.

1. Ionization energy refers to the energy required to remove an electron from an atom or ion.

2. The first ionization energy is the energy needed to remove the first electron, while the second ionization energy is the energy needed to remove the second electron.

3. In general, the ionization energy increases as electrons are removed, because the remaining electrons are more strongly attracted to the positively charged nucleus.

4. Since the second ionization energy of Mg is 1445 kJ/mol, the first ionization energy must be less than this value, as it takes less energy to remove the first electron.

to know more about ionization energy refer here:

https://brainly.com/question/28385102#

#SPJ11

The half-life of 3000 ppm NO is 4.87 × 10⁻⁸ s.

Nitrogen oxide is one of the pollutants in automobile exhaust and can react with oxygen to form 10³ litter/mol.s (1.4 x 109 ppm2/min).

Calculate the half-life of 3000 ppm NO. (Assume excess 2NO2. At 298 °K, rate constant k = 14.8 x of oxygen is consumed therefore the rate of reaction depends solely on NO).

We need to determine the half-life of 3000 ppm NO.

Let's recall the half-life equation,

t1/2 = (0.693 / k) × (1 / [A]t - 1 / [A]0)

Here, k = 14.8 × 10³ L/mol·sAt 298 °K,

the rate of reaction depends solely on NO.

Therefore, [A]0 = 3000 ppm = 3000/10⁶ = 0.003 mol/L.

Since 2NO2 is in excess, the rate of the reaction depends on the concentration of NO, and hence

[A]t = 0.5

[A]0 = 0.5 × 0.003

= 0.0015 mol/L.

Now we can substitute all the values in the half-life equation, t1/2

= (0.693 / 14.8 × 10³ L/mol·s) × (1 / 0.0015 mol/L - 1 / 0.003 mol/L)t1/2

= (0.693 / 14.8 × 10³ L/mol·s) × (1 / 0.0015 - 1 / 0.003) mol/Lt1/2

= (0.693 / 14.8 × 10³ L/mol·s) × (666.67) mol/Lt1/2

= (0.693 / 14.8 × 10³ L/mol·s) × 666.67 mol/Lt1/2 = 3.25 × 10⁻⁵ s / 666.67t1/2

= 4.87 × 10⁻⁸ s

To know more about nitrogen oxide visit:

https://brainly.com/question/29610670

#SPJ11

The empirical formula of a compound that is 20.2 aluminum and 79.8 chlorine by mass is AlCl₃

The given mass is 20.2 aluminium and 79.8 chlorine

The ratio of the aluminium is 1

The ratio of the chlorine is 3

1 Aluminium atoms reacts with 3 chlorine atom the empirical formula is AlCl₃

Hence the empirical formula of the given compound is AlCl₃

Learn more about empirical formula on

https://brainly.com/question/11334159

#SPJ4

Answer:

linear

Explanation:

.....................…...…

Explanation:

bent with an H-0-H angle if 104.5°

The greater the ΔEN  between bonded atoms, the larger the partial charges on the atoms, and the higher the partial ionic character of the bond.

ΔEN is the absolute value of the electronegativity difference between two bonded atoms.

This value gives an idea of the strength and the polarity of the expected bond formed between the atoms.

A very small or zero electronegativity difference means that the bond is covalent and nonpolar. However, if the electronegativity difference is large, the bond is polar covalent, or ionic.

The electronegativity of atoms is a measure of the ability of atoms to attract electrons to themselves.

Learn more about electronegativity at: https://brainly.com/question/18258838

#SPJ1

Answer:This Should Be the Answer :)

Explanation:

iven: Molar mass of Au = 196.96 g/mol. The Number of moles = 15.3 moles. Hence, 15.3 moles of Au contains 3.01 103 g of Au.

Answer: option c an electron has a negative charge and is located outside the nucleus revolving in circular path

According to the structure of atom, an electron has a negative charge and is located outside the nucleus.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

Learn more about atom,here:

https://brainly.com/question/13654549

#SPJ3

Answer:

18.65004 grams H2O

Explanation:

First, we need to write down the balanced chemical equation for the decomposition reaction:

2LiOH -> H2O + Li2O

Since we have grams of LiOH and we need to know the grams of water, we need to convert to moles since we can only compare moles to moles.

The amu of LiOH is 23.947.

The given grams of LiOH is 63.. To convert to moles, we will divide 63 by 23.947..

This gives us 2.6310 moles LiOH..

To convert to moles of H2O (and later grams of H2O), we will use the mole fractions from the balanced equation...

When we look at the balanced equation we can see that 2 moles of LIOH can produce 1 mol of Water, so:

2.6310 moles \(* \frac{1 molH_{2}O}{2 mol LiOH}\) = 1.3155 moles H2O

Now we will convert from moles to grams (we must multiply by the amu)

1.3155 moles H2O = 18.65 grams H2O

According to stoichiometry of the chemical equation of decomposition of lithium hydroxide 23.6 g of water are produced from the decomposition of 63 grams of lithium hydroxide.

Stoichiometry is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.It is useful in balancing chemical equations.

In the given example, as 47.9 g of lithium hydroxide produces 18 g water ,therefore 63 of lithium hydroxide will produce 63×18/47.9=23.6 g of water.

Thus, 23.6 g of water are produced from the decomposition of 63 grams of lithium hydroxide.

Learn more about stoichiometry,here:

https://brainly.com/question/9743981

#SPJ2

The mass of one mole of magnesium chloride is 95.21 g/mol.

The mass of one mole of magnesium chloride (MgCl2) can be calculated by adding the atomic masses of one mole of magnesium and two moles of chlorine.

Atomic mass of magnesium = 24.31 g/mol . Atomic mass of chlorine = 35.45 g/mol (because chlorine has two isotopes, the average atomic mass is taken) . Thus, the mass of one mole of magnesium chloride (MgCl2) = 24.31 g/mol + 2(35.45 g/mol) = 24.31 g/mol + 70.90 g/mol = 95.21 g/mol . Therefore, the mass of one mole of magnesium chloride is 95.21 g/mol.

Atomic mass is the amount of matter that makes up an element's atom. The total mass of the protons, neutrons, and electrons that make up an atom is a little bit less than the observable atomic mass.

The average mass of an element's atoms , expressed in  ( amu, commonly known as daltons , D) is the element's atomic mass. The mass of each isotope is multiplied by its abundance to get the atomic mass , which is a weighted average of all the isotopes of that element.

To know more about Atomic mass :

https://brainly.com/question/26609073

#SPJ11

Explanation:

Actually the total abundant of isotopes of any element in the world must sum up to 100 percent. So we initially know that 12c is 98.9 percent. Therefore the remaining of the remains of 100 must be 12

3c = 100%- 98.9

13c= 1.1%

Answer:

Convection currents transfer heat from one place to another by mass motion of a fluid such as water, air or molten rock. The heat transfer function of convection currents is what drives the earth’s ocean currents, atmospheric weather and geology. Convection currents form because a heated fluid expands, becoming less dense. The less-dense heated fluid rises away from the heat source. As it rises, it pulls cooler fluid down to replace it. This fluid in turn is heated, rises and pulls down more cool fluid. In geology, molten rock in the mantle rises up from the bottom of the mantle after becoming hotter and less dense from the heat of the earth’s core. As the rock loses heat into the earth’s crust, it becomes relatively cooler and more dense, sinking back down to the core.

Therefore your answers are:

A, Less dense material rising, denser material sinking.

C, Some sort of liquid cycle: rising when hot, falling by gravity when cooler.

B, The cycle of Earths Materials in the mantle.

A pot of soup cooking could be modeled as an example of a convection current but is not the definition of it.

Dye in a bucket of water that goes up and down is not an example of a convection current.