sam wanted to do a demonstration for her class. the directions called for kcl. there was not kcl in the stockroom. what would be the best choice to substitute in the reaction?

the value of δg at 298 K is -30 kJ + (8.314 J/(mol·K))

To calculate the value of δg at 298 K for this reaction, we can use the equation:

δg = δg° + RT * ln(Q)

Where:
- δg is the change in Gibbs free energy
- δg° is the standard Gibbs free energy change at standard conditions (298 K)
- R is the ideal gas constant (8.314 J/(mol·K))
- T is the temperature in Kelvin (298 K)
- ln(Q) is the natural logarithm of the reaction quotient (Q)
In this case, we are given the value of δg° (-30 kJ) and the partial pressures of the gaseous substances (1.15 atm a, 0.05 atm b, and 3.75 atm c).
First, we need to calculate the value of Q by using the given partial pressures:

Q = (Pc)^3 / (Pa)^2 * (Pb)^3
Plugging in the values:

Q = (3.75)^3 / (1.15)^2 * (0.05)^3

Next, we can substitute the known values into the equation to calculate δg:

δg = -30 kJ + (8.314 J/(mol·K)) * (298 K) * ln(Q)

Now, calculate ln(Q) and substitute it into the equation:

ln(Q) = ln((3.75)^3 / (1.15)^2 * (0.05)^3)

Finally, calculate δg using the given values:

δg = -30 kJ + (8.314 J/(mol·K)) * (298 K) * ln(Q)

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it is b forces hold matter together

A force is a push or pull on an object. Forces usually cannot be seen but their effects can. Nothing moves, changes speed, stops or changes direction without force. Heavier objects need more force to get them to move or change direction.

Answer:

Yup, it's B. Forces hold matter together.

Explanation:

The other user is correct. :)

Answer:

The specific heat of Barium is 0.204 J/g K

Answer:

The term poly implies many, so a polyatomic particle is a particle that contains more than one atom. Hence it is not the same as monatomic particles, which contain just a single iota. Instances of monatomic particles incorporate Na+ and Cl-

Answer:

The ions which contain more than one atoms behaving as a single unit are called polyatomic ions. For example, PO43−,CO32−

Explanation:

Condensation reaction can occur  to make ethyl ethanoate, but not hydrolysis, combustion, or an acid-base reaction.

A condensation reaction is a sort of chemical process in which two molecules join to produce a bigger molecule while a smaller molecule, such as water or methanol, is lost. Ethyl ethanoate can be produced through a condensation process between ethanol and acetic acid.

Hydrolysis is a process that uses water to break down a molecule into smaller components.

Combustion is a fast chemical process that creates heat and light by combining a fuel and an oxidizer.

An acid-base reaction occurs when an acid combines with a base to generate a salt and water.

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The powers granted to the federal government alone are known as reactant powers. These powers include the power to regulate foreign and interstate commerce, declare war, and coin money.

The other types of powers granted by the US Constitution are concurrent powers (shared by both federal and state governments) and reserved powers (reserved for the state governments). Examples of concurrent powers include the power to tax and the power to establish courts, while examples of reserved powers include the power to conduct elections and regulate intrastate commerce.

These powers are specifically given to the federal government in the United States Constitution to ensure the proper functioning of the nation. The federal government has the exclusive authority to carry out these tasks, and state governments do not have the ability to exercise these powers.

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The reaction you're describing is a halogenation reaction where an unsymmetrical alkene reacts with a halogen (X2) and water (H2O) to form a halohydrin. The general reaction can be represented as follows:

Asymmetrical alkene + X2 + H2O → Halohydrin

For example, let's consider the reaction between propene (an asymmetrical alkene) and chlorine gas (Cl2) in the presence of water (H2O):

CH3CH=CH2 + Cl2 + H2O → CH3CH(Cl)CH2OH

In this reaction, the double bond of propene is broken and a chlorine atom is added to one carbon atom, while a hydroxyl group (-OH) is added to the other carbon atom.

This forms a halohydrin, which in this case is 2-chloropropanol. The reaction mechanism involves the formation of a cyclic intermediate called a halonium ion, which is then attacked by water to form the halohydrin.

Note that the halogenation of an unsymmetrical alkene can lead to the formation of different products, depending on the regioselectivity of the reaction. In the example above, the reaction is regioselective because the chlorine atom is added to the less-substituted carbon atom of the alkene.

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Answer:

The increase in the concentration of reactants increases the frequency of effective collisions.

Explanation:

The concentration of reactants determines the rate of reaction by providing the number of reactants available to yield an effective collision. There is a direct relationship between the concentration of reactants and rate of reaction.

Answer:

Follows are the solution to this question:

Explanation:

The law of dogs:

Under such a law, although electrons were filled in the

electron, a computer terminal is loaded into it's orbital or paired.

All particles should have the same spinning as one another.

Principle of building construction:

By this principle, atoms are filled with both the energy equation in the angular first. Three d-orbitals exist in cosmos L.

The very first series of transition metals show divergence from the dog law and the principle of Aufbau.

Besides that, half - or full-filled orbital angular momentum is much more stable than orbitally filled up. Components thus strive to achieve equilibrium through transferring electrons, as was shown below partially  filled:

please find the attaced file.

Its second transition element (such that, titanium) is thus the electrical structure in the universe L. \([X]4s^23d^3\) besides half-filled stable setup since only 3 d, orbital angular is filled present.

Its third transition factor (Vanadium) electronically does have a configuration of \([X]4s^23d^3\), It's half-full already. where X sits only at end of the row for noble gas Before the first sequence for transformations.

Answer:

(C) through the atmosphere

Explanation:

ANSWER

EXPLANATION

Given that

The number of moles lithium bromide is 5.5 moles

Firstly, write a balanced equation for the reaction

Find the number of moles of bromine using stoichiometry ratio

Let x represents the number of bromine

There are basically three types of science investigation:

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Answer:

a solar eclipse is when the moon moves between the earth and the sun, so the moon casts a shadow on the earth

Explanation:

Answer:

the moon gets in the way of the sun and cast a shadow onto earth

Explanation:

Answer:

the atomic number of the element with 77 as atomic weight and 55 neutrons is 22

Answer:

may or may not be equal to the number of moles of the products.

Explanation:

A chemical reaction involves the interaction between reactants to yield products. The number of moles of reactants and products in the system depends on the stoichiometry of the reaction.

The balanced reaction equation shows us the number of moles of reactants and products involved in the reaction.

Hence, in the balanced chemical reaction equation; the number of moles of reactants may or may not be equal to the number of moles of the products.

Answer:

Hope this will help..........

Explanation:

Seawater desalination is the removal of salt and impurities from seawater to produce fresh water. Our desalination plants use a reverse osmosis process. ... The filtered seawater is then forced under pressure through special membranes whereby the osmosis process that normally occurs in nature is reversed

Answer:

7.C or D not sure

Explanation:

its just a opinion :3

Answer:

See below

Explanation:

13.  The molar mass of Cl2 is 70.9 grams/mole.  Mass of 0.560 moles:

(0.560 moles)*(70.9 grams/mole) = 39.7 grams Cl2

14.  2 moles of M93N2 has 2*2 = 4 moles of N atoms

15.   2.00 moles Mg3N2 has 2*2 = 4 moles N atoms

16.  9.0 grams of Ag.  The molar mass of silver is 107.9 g/mole.  9.0 grams means that there is (9.0g/(107.9 g/mole) = 0.0834 moles Ag.  

   (0.0834 moles Ag)*(6.022x10^23 Ag atoms/mole) = 5.02x10^22 atoms of silver

The mass of 0.560 moles of chlorine gas is 39.7 g. There are 6.00 moles of Mg atoms and 4.00 moles of N atoms respectively in 2.00 moles of Mg3N2 compound. The number of atoms in 9.0 g of silver can be calculated by converting the grams to moles then multiplying by Avogadro's number.

The mass of chlorine gas can be calculated by multiplying the given moles with the molar mass of chlorine. The molar mass of chlorine (Cl2) is approximately 70.9 g/mol. Therefore, the mass of 0.560 moles of chlorine gas would be 0.560 * 70.9 = 39.7 g.

For Mg3N2, there are 3 moles of Mg per mole of Mg3N2, so there are 2.00 * 3= 6.00 moles of Mg atoms in 2.00 moles of Mg3N2. Similarly, there are 2 moles of N per mole of Mg3N2 so, there are 2*2.00 = 4.00 moles of N atoms in 2.00 moles of Mg3N2.

The number of atoms in silver can be calculated using Avogadro's number, which is 6.02 x 10^23 atoms per mole. First convert the mass to moles (silver has a molar mass of approximately 107.87 g/mol) and then multiply by Avogadro's number.

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Q is an important parameter to understand the direction and rate of a chemical reaction.

The reaction quotient (Q) is a mathematical expression that relates the concentrations of products and reactants at any point in a chemical reaction.

It is calculated in the same way as the equilibrium constant (K), but it is used to describe the state of the reaction at any point in time, rather than at equilibrium.

The expression for Q is given by the product of the concentrations of the products raised to their stoichiometric coefficients divided by the product of the concentrations of the reactants raised to their stoichiometric coefficients.

The concentrations used in the calculation are the instantaneous concentrations at the point in time where the reaction is being measured.

Q measures the degree to which the reaction has progressed towards equilibrium, relative to the equilibrium constant. If Q is less than K, the reaction will shift towards the products to reach equilibrium.

If Q is greater than K, the reaction will shift towards the reactants to reach equilibrium. If Q is equal to K, the reaction is already at equilibrium.

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Based on the atomic structure of the given elements, the atoms in each pair having the larger atomic radii are as follows:

The atomic radius of an atom is the radius of the atom of an element.

It is measured as half the distance between the nucleus of two covalently bonded atoms of the element.

The atomic radius of an atom increases with an increase in electron shells or orbital but decreases with an increase in atomic number in atoms with the same number of electron shells.

Comparing the atomic radii of the given elements:

1. Li or Cs - Cs has the larger atomic radii because of greater atomic orbitals

2. K or Br - K has a greater atomic radius because it has a smaller atomic number with the same number of orbitals as Br.

3. Li or Fluorine - Li has a greater atomic radius because it has a smaller atomic number with the same number of orbitals as Fluorine.

4. C or Pb - Pb has the larger atomic radii because of greater atomic orbitals

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Potential energy : energy obtained due to height or position (the force of gravity)

 PE = mhg

g = acceleration due to gravity  (m/s²)

h = height (m)

m = mass (kg)

1. Known

m = 0.5 kg

h = 1 m

g = 9.8 m/s²

then :

\(\tt PE=0.5\times 1\times 9.8=4.9~J\)

Kinetic energy is the energy gained by an object's motion

KE = 1/2 mv²

2. To find KE, the required data are the mass and velocity

in this table, you do not display the velocity

There is only one sodium ion for every chlorine ion due to its valency.

The number of electrons that an atom needs to lose or gain in order to achieve a stable electron configuration i.e the octet of an element is known as the valency of an element, which serves as a gauge of that element's potential for combining.

The valency of Sodium (Na) is 1 and that of chlorine (Cl) is also one. therefore they combine to form a stable compound. The same rule follows in the compound formed by Potassium (K) and Oxygen(O) also. The valency of oxygen is 2 which means that it should be surrounded by 2 potassium ions to provide electrons to fulfill both the elements' octets.

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As an electron moves from a high potential to a low potential, its electrical potential energy increases.

Electric potential energy:

Electric potential energy is the energy that is needed to move a charge against an electric field. We need more energy to move a charge further in the electric field, but also more energy to move it through a stronger electric field.

The direction of electric fields is from the region of high potential to low potential and electrons or any negatively charged particle will move against the field or lower potential to a higher potential.

Therefore when an electron moves from higher to lower potential electrical potential energy increases.

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The complete question is:

As an electron moves from a high potential to a low potential, its electrical potential energy :

a) increases

b) decreases

c) remains constant

Answer:

A and C

Explanation:

When you are cleaning glass you should wear gloves so you don't cut yourself. When you are cleaning blood of a surface you should also wear gloves so that the blood has no way of getting inside of you.

Answer:

A, C,

Explanation:

A, because you can cut your self.

B, because so you dont touch the blood

Answer:

Without the respiratory system your blood would be useless. The circulatory and respiratory systems work together to circulate blood and oxygen throughout the body

Explanation: