Which variables are represented in the Gibbs free energy equation ΔH−TΔS?


change in enthalpy, change in heat energy, entropy

change in entropy, change in enthalpy, and temperature

enthalpy, heat energy, entropy

change in temperature, change in entropy, and enthalpy

Answer:

21409

Explanation:

Please give the brainliest.

The percent yield of \(MgO\) is 58.79%

According to the following balanced reaction, magnesium interacts with oxygen to generate magnesium oxide:

\(2Mg + O_2 \rightarrow 2MgO\)

Given mass of solid magnesium = 0.261g

Molar mass of Mg = 24g/mol

Using formula , \(Number of moles =\dfrac {mass} {molar mass} = \dfrac {0.261g} {24g/mol} = 0.0108mole\)

We could theoretically make 0.0108 moles of \(MgO\) since the reaction yields an equimolar quantity of \(MgO\). It is clear from the above reaction that 2 moles of magnesium result in 2 moles of magnesium oxide.

Hence, mass of \(MgO\) = Number of moles \(\times\) Molar mass of MgO

mass of \(MgO\)  = \(0.0108mole \times 40g/mole = 0.432g\)

Percent yield =  \(\dfrac{Actual mass of MgO} {Theoretical mass of MgO} \times 100\)

                       =  \(\dfrac{0.254} {0.432} \times 100 = 58.79percentage\)

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Answer: 7

Explanation: i don't know how the HECK. -3-(-8)-(-2)=7 but I searched it up soooooo also I got it right

Answer:

I know its not Oxygen (O2) because we need that gas to breath if not more of that gas! and i know its not helium because it is not very toxic and not a crisis in the world

Your answers are going to be B. and D.

have a nice day!

Given :

An ideal gas contained in a cylinder with the volume 34.4L, temperature 667K and pressure 2 atm.

To Find :

What will be pressure of the gas if it is heated at 1000k and the volume becomes 50L.

Solution :

We know, by ideal gas equation :

\(Pv = nRT\)

Now, in the given question only their are two state and also their is no leakage so amount of gas is also constant.

So,

\(\dfrac{P_1V_1}{T_1} = \dfrac{P_2V_2}{T_2}\\\\\dfrac{2\times 34.4}{667} = \dfrac{P_2 \times 50}{1000}\\\\P_2 = \dfrac{2\times 34.4 \times 1000}{667 \times 50}\ atm\\\\P_2 = 2.06 \ atm\)

Therefore, the pressure of gas is 2.06 atm.

Answer:

other guy is correct. it is C Quebec.

Explanation:

got it right on the unit test review, edge 2021

(a)The pH of the fruit juice solution is approximately 3.5. (b) The hydrogen ion concentration of the tomato solution is 0.001 mol/L.

(b)The hydrogen ion concentration of the tomato solution is 0.001 mol/L.

(a). The hydrogen ion concentration of the fruit juice is 0.0003 mol/L. We can determine the pH of the solution using the formula pH = -log[H⁺].

pH = -log(0.0003)

pH ≈ -log(3 × 10⁻⁴)

Using a calculator, we can calculate the logarithm:

pH ≈ -(-3.5229) (rounded to the nearest tenth)

pH ≈ 3.5

Therefore, the pH of the fruit juice solution is approximately 3.5.

(b). A tomato has a pH of 3.0. We can determine the hydrogen ion concentration of this solution by rearranging the formula pH = -log[H⁺] to solve for [H⁺].

[H⁺] = 10(-pH)

[H⁺] = 10⁻³

[H⁺] = 0.001 mol/L

Therefore, the hydrogen ion concentration of the tomato solution is 0.001 mol/L.

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Answer:

there is only one electron in the outer shell of lithium.

Explanation:

i looked it up. ,(^w^)>

Answer: 185 grams

Explanation: First find out how many grams are in one mol: The molar mass es are taken from the periodic table, Ca is 40, O is 16, H is 1. There are 2 O and 2 H for (OH)2: 40+32+2= 74g/mol x 2.5 mol = 185 the moles cancel and you are left with grams

Answer:

Water oxygen has lone electron pairs that repel each other.

Explanation:

Water has a "bent" geometry because water’s oxygen has lone electron pairs that repel each other.

A pair of valency electrons of opposite spin that are not shared between the atoms in a molecule and are responsible for the formation of coordinate bonds.

A water molecule consists of two hydrogen atoms bonded to an oxygen atom, and its overall structure is bent.

This is because the oxygen atom, in addition to forming bonds with the hydrogen atoms, also carries two pairs of unshared electrons.

All of the electron pairs—shared and unshared—repel each other.

Hence, option B is correct.

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C/ If Fe is greater than Fg, the negatively charged oil droplet will move freely toward the negatively charged plate.

In the Millikan oil droplet experiment, the negatively charged oil droplets are subjected to an electric field created by the charged plates. The electric force (Fe) acts on the oil droplet in a direction opposite to the gravitational force (Fg). When Fe is greater than Fg, the electric force overcomes the gravitational force, causing the negatively charged oil droplet to experience an upward force. As a result, the oil droplet moves freely upward toward the negatively charged plate.

Option B is incorrect because if Fe is equal to Fg, the forces balance each other, resulting in a stationary droplet. However, the question states that Fe is increased until it is greater than Fg, implying that the droplet is no longer stationary but moves in response to the electric force.

Therefore, option C is the correct answer, as it describes the effect of an electric field on the motion of a negatively charged oil droplet in the Millikan oil droplet experiment.

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Using the formula M1V1 = M2V2, the molarity of M1 = 5M, V1 = 30mL M2 = x V2 = 300mL is 0.5M. Option B is the correct answer.

To solve for the unknown in the given problem, we need to use the formula M1V1 = M2V2. This formula states that the amount of solute (Molarity) in a solution is constant, as long as the volume of the solution is constant.

We are given M1 = 5M and V1 = 30mL, and we need to find M2, given V2 = 300mL. Substituting these values into the formula, we get:

5M × 30mL = M2 × 300mL

Simplifying this equation, we get:

150 = 300M2

Dividing both sides by 300, we get:

M2 = 0.5M

Therefore, the answer is B. 0.5M, which represents the molarity of the unknown solution. In summary, we used the formula M1V1 = M2V2 and substituted the given values to find the unknown molarity, which was the solution to the problem.

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When an individual operates at a level which is beyond the societal level of ethical morality such that one's decision is based on what is right depending on circumstance. Hence, Britta is operating at the Post conventional

Morality is usually defined based on societal culture which is usually general. This includes general rules or conception.

Acts such as burglary or breaking into someones else's store such as what Britta did is wrong and unethical based on societal standard. However, the circumstance leading to her acts makes her feel it is the right thing to do.

Hence, the reason she didn't feel she had done anything wrong and waited till the store owner arrived.

Therefore, Britta is operating at the post conventional level of Kohlberg's morality theory.

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Answer: post-conventional

Explanation:

Answer:

CO

Explanation:

1.  the final concentration of NaOH after adding 125 mL of water to 45.3 mL of 0.71 M NaOH solution is approximately 0.189 M.

2.  the final concentration of KOH after adding 550 mL of water to 125 mL of 3.01 M KOH solution is approximately 0.557 M.

1.) If 125 mL of water is added to 45.3 mL of a 0.71 M NaOH solution, the resulting solution will be a diluted NaOH solution. The addition of water will increase the total volume while reducing the concentration of NaOH. To determine the final concentration of NaOH, we need to consider the conservation of moles.

First, let's calculate the moles of NaOH in the initial solution:

moles of NaOH = volume (in L) × concentration (in M)

moles of NaOH = 0.0453 L × 0.71 M = 0.0321433 moles

After adding 125 mL (0.125 L) of water, the total volume of the solution becomes 0.0453 L + 0.125 L = 0.1703 L.

To find the final concentration, we divide the moles of NaOH by the total volume:

final concentration of NaOH = moles of NaOH / total volume

final concentration of NaOH = 0.0321433 moles / 0.1703 L ≈ 0.189 M

Therefore, the final concentration of NaOH after adding 125 mL of water to 45.3 mL of 0.71 M NaOH solution is approximately 0.189 M.

2.) If 550 mL of water is added to 125 mL of a 3.01 M KOH solution, the resulting solution will also be a diluted solution. Again, we will apply the conservation of moles to determine the final concentration of KOH.

First, calculate the moles of KOH in the initial solution:

moles of KOH = volume (in L) × concentration (in M)

moles of KOH = 0.125 L × 3.01 M = 0.37625 moles

After adding 550 mL (0.55 L) of water, the total volume of the solution becomes 0.125 L + 0.55 L = 0.675 L.

To find the final concentration, divide the moles of KOH by the total volume:

final concentration of KOH = moles of KOH / total volume

final concentration of KOH = 0.37625 moles / 0.675 L ≈ 0.557 M

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The statement about the inequality that is NOT true is (A), a and b may be equal to each other.

This is because the inequality y> x-4 means that y must be greater than x-4. If a and b are equal, then y = x-4, which means that the inequality is not satisfied.

The other three statements are true because:

If 4 is subtracted from a, it will be greater than b because y> x-4 means that y must be greater than x.

If 4 is subtracted from b, it will be less than a because y> x-4 means that y must be greater than x.

If 4 is subtracted from both a and b, the inequality will still be true because y> x-4 means that y must be greater than x, even if x and b are both decreased by 4.

Therefore, the answer to the question is the statement a and b may be equal to each other.

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Complete question:

Guided Learning ar Inequalities in One Variable - Item 7601

Pre-Quiz

Practice

from a, it will be greater than b.

Post-Quiz

Finish

If the ordered pair (a, b) satisfies the inequality y> x-4, three of these statements are true. Which statement is NOT true?

a and b may be equal to each other.

If you subtract 4 from a, it will be greater than b.

If you subtract 4 from b, it will be less than a.

If you subtract 4 from both a and b, the inequality will still be true.

Answer:

The answer is

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\ \)

From the question

mass of metal = 34 g

volume of metal = final volume of water - initial volume of water

volume = 25.3 - 22.3 = 3.0 mL

The density is

\(density = \frac{34}{3} \\ = 11.33333...\)

We have the final answer as

Hope this helps you

solids, phase of matter holds its shape, has definite volume and is rigid

One of the three fundamental states of matter, along with liquid and gas. (Ionized gases or plasmas are occasionally regarded as the fourth state of matter.) Because the energy of atoms lowers when they occupy a reasonably organised, three-dimensional structure, a solid develops from a liquid or gas. Solids differ from liquids and gases in that they have particular properties. For instance, all solids can withstand forces that are parallel or perpendicular to a surface (i.e., normal or shear loads, respectively). Those characteristics are influenced by the solid's constituent atoms' characteristics, their arrangement, and the forces that act between them.

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The correct answer is option C.  if you are looking for a non-dairy alternative to get the same amount of calcium as 8 oz of nonfat milk, canned sardines can be an excellent option.

which is 1.5 oz of canned sardines. Nonfat milk contains approximately 300 milligrams of calcium per 8-ounce serving. Sardines are an excellent source of calcium and a 1.5-ounce serving of canned sardines contains around 325 milligrams of calcium, which is equivalent to the calcium content in 8 ounces of nonfat milk.

Option A, 4.9 oz plain, nonfat yogurt, contains around 150 milligrams of calcium, which is less than half the amount present in 8 oz of nonfat milk. Option B, 4.9 oz Swiss cheese, contains around 270 milligrams of calcium, which is slightly less than the amount present in 8 oz of nonfat milk. Option D, 1 cup of lima beans, contains around 32 milligrams of calcium, which is a significantly lower amount than what is present in 8 oz of nonfat milk.

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Answer:

I think it would be b

Explanation:

pls correct me if im wrong!

Answer:

With a short life cycle, greenhouse gas fixation ability, and high lipid production capacity, we use cyanobacteria as an efficient biofuel platform. Carbon dioxide released by the burning of fossil fuel and industrial emissions can be captured and used by these organisms efficiently.

Explanation:

What do cyanobacteria use for energy production?

oxygenic photosynthesis

They commonly obtain their energy through oxygenic photosynthesis, which produces the oxygen gas in the atmosphere of Earth. The name cyanobacteria comes from their color (Greek: κυανός, romanized: kyanós, lit.

The balanced chemical equation for the reaction between barium hydroxide, Ba(OH)₂ and HNO₃ to produce barium nitrate, Ba(NO₃)₂ is

Ba(OH)₂ + 2HNO₃ —> Ba(NO₃)₂ + 2H₂O

Chemical equations are representations of chemical reactions using symbols and formula of the reactants and products.

The reactants are located on the left side while the products are located on the right side.

Reactants —> Products

The balancing of chemical equations follows the law of conservation of matter which states that matter can neither be created nor destroyed during a chemical reaction but can be transferred from one form to another.

Ba(OH)₂ + HNO₃ —> Ba(NO₃)₂ + H₂O

There are 2 atoms of N on the right side and 1 atom on the left side. It can be balanced by writing 2 before HNO₃ as shown below:

Ba(OH)₂ + 2HNO₃ —> Ba(NO₃)₂ + H₂O

There are 4 atoms of H on the left side and 2 atoms on the right side. It can be balanced by writing 2 before H₂O as shown below

Ba(OH)₂ + 2HNO₃ —> Ba(NO₃)₂ + 2H₂O

Now, the equation is balanced

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Answer:

it means that things people come up with can be tested and they can turn it into the truth or in another sense figure out if its true or not

Explanation:they can figure out if its real or not and or turn it into the facts from what people make up and or think so and so is this or that and they can find out the truth

Answer:

you differentiate to find the derivative

Explanation:

Answer:

A derived unit is a unit that results from a mathematical combination of SI base units.

OR

A unit of measurement obtained by multiplication or division of the base units of a system without the introduction of numerical factors.

Explanation:

i dont know if that answered your question

The water in the blue currents to sink causes by,

learn thermohaline circulation,

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Answer: A

Explanation:

trust me

To calculate the concentration of the iron sample by using a spectrophotometric method, it is necessary to dilute the sample. The volume to which the sample should be diluted is a crucial question in achieving the most accurate result.

The process involves diluting the sample, and the concentration must be calculated to determine the precise result of the dilution. This question can be answered by calculating the uncertainty and identifying the value of the uncertainty. The value with the lowest uncertainty will be the best value to choose. The volume with the lowest uncertainty will be the ideal volume to dilute the 5 ml aliquot of the iron sample to achieve a result with the minimum level of uncertainty.
To determine the optimal volume for dilution, the uncertainty should be calculated.
This can be done by using the equation for propagation of uncertainty, which states that the uncertainty of the result is equal to the square root of the sum of the squares of the uncertainties of the individual components. When calculating the uncertainty of the diluted sample, the uncertainty of the initial sample and the uncertainty of the diluent must be considered. The uncertainty of the initial sample can be calculated using the calibration curve. As the expected iron content is 40-60%, the concentration of the sample is expected to be 8-12 ppm. The uncertainty of the calibration curve is given by the standard deviation of the calibration standards.
The diluent has a negligible uncertainty. The uncertainty of the diluted sample will be lower if a larger volume is used for dilution because the relative contribution of the uncertainty of the initial sample will decrease. However, the uncertainty of the measurement will increase if the sample is diluted too much because the concentration of the analyte will be too low to be detected accurately. A 100 mL volume is a good choice because it balances the need for sufficient dilution to reduce the uncertainty of the initial sample with the need for sufficient concentration to allow for accurate detection of the analyte.

The volume of the sample that should be diluted is 5 ml. The minimum level of uncertainty is obtained at a dilution of 100 ml. When the volume of the diluent is greater than 100 ml, the uncertainty of the measurement increases, and when the volume of the diluent is less than 100 ml, the uncertainty of the measurement also increases. Thus, a 100 ml volume of diluent is the ideal volume to minimize the uncertainty in the analysis of iron.

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IUPAC is the nomenclature approach used for naming compounds. The compounds are ethane, butane, and butene.

IUPAC is the nomenclature method of the organic compounds that are universal and is recommended by the International union so that the names of the same chemical species are constant and ubiquitous all over.

The first compound has a single bond and two carbons hence ethane, the second compound has a single bond and four carbons and hence butane, and the third compound has one double bond and four carbon atoms and hence butene.

Therefore, the compounds are ethane, butane, and butene.

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Answer:

Got morning the iodate for the