which one of the following ionic compounds has an incorrect formula or is not named correctly? which one of the following ionic compounds has an incorrect formula or is not named correctly? co2o3, cobalt(iii) oxide mgs, magnesium sulfide coo2, cobalt(iv) oxide cu2s, copper(ii) sulfide cuo, copper(ii) oxide

Answer:

Explanation:

Hess’s law derives directly from the law of conservation of energy, as well as its expression in the first law of thermodynamics. By Hess’s law, the net change in enthalpy of the overall reaction is equal to the sum of the changes in enthalpy for each intermediate transformation: ΔH = ΔH1+ΔH2+ΔH3.

Answer:

yes it is a chemical reaction

Explanation:

because the substances combined and made something new

Answer:

0.10 amps

Explanation:

Answer:

A.

Explanation:

The number of the them will result in A.

Answer:

Matter is anything that has mass and takes up space. Mass gives an object the property of weight and inertia resistance to change in the motion of an object.

Explanation:Except for water, most liquids have particles which take up more space than they do when they are in their solid state.

Answer:

B

Explanation:

its solute state is gas and dissolve in (solvent) liquid which is water

The element that helps the heart and is found in nuts and legumes is magnesium.

In this case, we are being asked about the element that promotes normal heart rhythm and muscle function and can be found in nuts, legumes, whole-grain products, and dark green vegetables. We have to know that this element is one of the key elements that are important to the health of a person.

Now we have to look at the options tat we have and see that magnesium is the element that is abundant in the nuts and the legumes and have been linked to the effective function of the heart.

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Answer:

1

Explanation:

To determine the value of K (equilibrium constant) at 25 °C, we can use the Nernst equation, which relates the cell potential (E) to the equilibrium constant (K) and the standard cell potential (EºCell). The Nernst equation is given by:

E = EºCell - (RT / nF) * ln(K)

Where:

E = cell potential

EºCell = standard cell potential

R = gas constant (8.314 J/(mol·K))

T = temperature in Kelvin (25 °C = 298 K)

n = number of electrons transferred in the balanced redox equation

F = Faraday's constant (96,485 C/mol)

ln = natural logarithm

In this case, the given standard cell potential (EºCell) is -0.37 V.

The balanced redox equation for the cell reaction is:

Pt + Cr²+ -> Pt + Cr³+

Since there is no change in the oxidation state of Pt, no electrons are transferred in the reaction (n = 0).

Substituting the known values into the Nernst equation, we have:

E = -0.37 V - (8.314 J/(mol·K) * 298 K / (0 * 96,485 C/mol)) * ln(K)

E = -0.37 V

Since n = 0, the term (RT / nF) * ln(K) becomes 0, and we are left with:

-0.37 V = -0.37 V - 0

This implies that the value of K is 1, since any number raised to the power of 0 is equal to 1.

Therefore, the value of K at 25 °C for the given cell is 1.

1. The formula is LiF (lithium fluoride). The cation is Li (and there is one) and the anion is F (there is one too), so the ratio between cation-anion is 1:1.

2. The formula is Na2O (sodium oxide). The cation (metal) is Na and there are two atoms. And the anion (nonmetal) is oxygen and there is one. The cation-anion ratio is 2:1.

3. The formula is AlPO4 (aluminum phosphate), where cation is Al and PO4 is the anion. The ratio between cation and anion is 1:1.

4. The formula is AlF3 (aluminum fluoride), where cation is Al (there is one atom) and the anion is F (there are three atoms of F), so the cation-anion ratio is 1:3.

5. The formula is Fe2S3 (iron sulfate). The cation is Fe (we have two atoms of Fe) and the anion is S (we have three atoms of S), so the cation-anion ratio is 2:3.

Answer:

The total number of protons and neutrons is the mass number of an atom.

Explanation:

The mass number is made up of the total protons and neutrons in an atom. The mass number represents the mass of the atom in amu (atomic mass units). Electrons are not included in this representation because their mass is negligible (practically 0). The atomic number is made up of the total protons in an atom.

Answer:

\(0.00068M\)

Explanation:

Hello there!

In this case, according to the ionization of calcium hydroxide, a strong base:

\(Ca(OH)_2\rightarrow Ca^{2+}+2OH^-\)

Thus, since there is a 1:2 mole ratio of calcium hydroxide to hydroxide ions, we apply the following proportional factor to obtain:

\(0.00034\frac{molCa(OH)_2}{L}*\frac{2molOH^-}{1molCa(OH)_2} \\\\=0.00068\frac{OH^-}{L}\\\\=0.00068M\)

Regards!

The conjugate acid of H₂PO4 is H₃PO₄.

The correct option is D.

Conjugate acids are chemical species that are formed when a base accepts a proton.

A conjugate acid contains one more proton than the base from which it is formed.

Conjugate acids are derived from the Brønsted–Lowry acid–base theory, which states that an acid is a  chemical compound that donates a proton to a base.

The conjugate acid of H₂PO4⁻ will contain one more proton and a higher positive charge than H₂PO4⁻. Hence, the conjugate acid of H₂PO4⁻ is H₃PO₄.

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Answer:

29.5 days

Explanation:

orginally 27.3 days but 29.5 days is also correct

Answer:

To calculate the energy consumed by the client, we need to use the following formula:

Energy (in calories) = (grams of carbohydrate x 4) + (grams of protein x 4) + (grams of fat x 9)

First, let's calculate the amount of each nutrient in the 180ml serving:

Carbohydrates: (75 ml / serving) x (13.5 g / 75 ml) x 180 ml = 32.4 g

Protein: (75 ml / serving) x (10 g / 75 ml) x 180 ml = 24 g

Fat: (75 ml / serving) x (4 g / 75 ml) x 180 ml = 9.6 g

Now we can calculate the energy consumed:

Energy = (32.4 g x 4) + (24 g x 4) + (9.6 g x 9) = 129.6 + 96 + 86.4 = 312 calories

Therefore, the client has consumed 312 calories from the 180 ml serving of the product.

Becquerel  did not discover that the amount of exposure on the paper was proportional to the amount of uranium that was present in the rocks

The phenomenon of radioactivity was discovered by the French scientist Henri Becquerel in 1896 when he placed photographic paper in a drawer with some radioactive rocks.

We have to note that Becquerel did not discover that the amount of exposure on the paper was proportional to the amount of uranium that was present in the rocks hence the stetement is false.

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Examples of chemical changes include the chemical process that develops the colour dye and causes a chemical change in the hair. Organic, inorganic, and biochemical changes are the three different categories of chemical change. Here Baking soda and vinegar went through a chemical change. The correct option is D.

A chemical change is the transformation of one substance into another, the emergence of new compounds with distinct properties, or any combination of these.

Chemical transitions, commonly referred to as chemical reactions, are the conversion of one or more chemicals into one or more brand-new, distinct substances. In other words, a chemical transformation is an atomic rearrangement-based chemical reaction.

Thus the correct option is D.

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Answer: it is coastline.

Explanation: This anwser would only makw sense because of the low elevation and the flat land.

The landform shared by Florida and the eastern border of South Carolina is the coastline. Option C is the correct answer.

Both states are located along the Atlantic Ocean and have a similar geographical feature characterized by flat land and low elevation along their eastern borders. Option C is the correct answer.

The coastline refers to the area where the land meets the sea. It is typically marked by sandy beaches, coastal marshes, and barrier islands. In the case of Florida and the eastern border of South Carolina, this coastline is known for its relatively flat terrain and low elevation, which makes it susceptible to flooding and storm surge during hurricanes. The coastline plays a significant role in the economies and ecosystems of both states. It attracts tourism and provides opportunities for recreational activities such as beachgoing, fishing, and boating. It is also a vital habitat for various marine and coastal species, including birds, turtles, and marine mammals.

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The complete question is, "Florida and the eastern border of South Carolina share a regional landform characterized by flat land and low elevation. Identify the landform shared by both states.

a. Karst

b. Keys

c. Coastline

d. Plateau"

realidades-2

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2NH3(g) = N2(g) + 3H2(g)

Before decomposed :

P NH3 = 2.7 atm

After decomposed :

P N2 = 0.54 atm

P H2 = P N2 / 3 = 0.54 / 3 = 0.18 atm

P NH3 = 2.7 - 2(0.18) = 2.34 atm

Pressure equilibrium constant :

Kp = (P N2)(P H2)³ / (P NH3)²

Kp = (0.54)(0.18)³ / (2.34)²

Kp = 5.75 × 10^(-4)

Answer:

B.K2(OH)2 i think that is the answer

Answer:

hydrochloric acid

Explanation:

chemical compound any substance composed of identical molecules consisting of atoms

Answer:

See the answer below

Explanation:

The correct answer would be that the solute particles lower the solvent's vapor pressure, thus requiring a higher temperature to cause boiling.

Dissolving a solute particle in a solvent leads to a decrease in the vapor pressure of the solvent above the resulting solution when compared to the pure solvent. The lower the vapor pressure of a liquid, the higher the temperature required for the liquid to boil and vice versa. Hence, a higher temperature would be needed to boil a solvent with dissolved solutes.

The current passing through the electrolytic cell is approximately 2.02 x 10^4 Amperes.

To calculate the current in amperes, we need to use Faraday's laws of electrolysis and the stoichiometry of the reaction.

Faraday's laws state that the amount of substance produced or consumed during electrolysis is directly proportional to the quantity of electricity passed through the cell. The relationship is given by:

Q = nF

Where Q is the electric charge in coulombs (C), n is the number of moles of substance involved in the reaction, and F is Faraday's constant, which is equal to 96,485 C/mol.

In this case, the substance being produced is Cl2, and we know the mass of Cl2 produced, which is 4.8 x 10^5 g.

First, we need to calculate the number of moles of Cl2 produced:

Molar mass of Cl2 = 35.45 g/mol

Moles of Cl2 = mass / molar mass = (4.8 x 10^5 g) / (35.45 g/mol) ≈ 1.354 x 10^4 mol

Now we can calculate the quantity of electricity passed through the cell using Faraday's laws:

Q = nF

Q = (\(1.354 x 10^4\)mol) * (96,485 C/mol)

Q ≈ 1.308 x 10^9 C

The quantity of electricity is given in coulombs. To find the current, we need to divide this value by the time in seconds.

Given that the time is 18 hours, we convert it to seconds:

Time = 18 hours * 60 minutes/hour * 60 seconds/minute

Time = 6.48 x 10^4 seconds

Finally, we can calculate the current:

Current (I) = Q / Time

I = (1.308 x 10^9 C) / (6.48 x 10^4 s)

I ≈ 2.02 x 10^4 Amperes

Therefore, the current passing through the electrolytic cell is approximately 2.02 x 10^4 Amperes.

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Answer:

HI is the formula of hydroiodic acid

Explanation:

hope it helps you

0.86 moles of \(N_2\) and 1.72 moles of Li will react.

We must place a 3 coefficient in front of Li in order to bring the equation into balance:

\(N_2 + 2Li = 2Li_3N\)

The balanced equation demonstrates that 2 moles of Li and 1 mole of N2 react to create 2 moles of Li3N. Therefore, we can apply the following dimensional analysis to determine how many moles of Li will react with 0.86 moles of N2:

\(0.86 mol N_2 x (2 mol Li / 1 mol N_2) = 1.72 mol Li\)

A declaration that two expressions with variables or integers are equal. In essence, equations are questions and attempts to systematically identify the solutions to these questions have been the driving forces behind the creation of mathematics.

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Answer:

4650.0

Explanation:

Taking into account the scientific notation, the result of the subtraction is -4.20689×10⁻².

Scientific notation is a quick way to represent a number using powers of base ten, where the numbers are written as a product:

a×10ⁿ

where:

When the numbers to be added do not have the same base 10 exponent, the base 10 power with the highest exponent must be found. In this case, the highest exponent is -2.

Then all the values ​​are expressed as a function of the base 10 exponent with the highest exponent. In this case: 3.11×10⁻⁵= 0.00311×10⁻²

Taking the quantities to the same exponent, all you have to do is subtract what was previously called the number "a". In this case:

0.00311×10⁻² - 4.21×10⁻²= (0.00311 - 4.21)×10⁻²= -4.20689×10⁻²

Finally, the result of the subtraction is -4.20689×10⁻².

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Answer:

  -172.6 °C

Explanation:

You want to know the Celsius equivalent of the temperature 100.6 K.

The relation is ...

  C = K - 273.15

  C = 100.6 -273.15 = -172.55

The temperature is -172.55 °C, about -172.6 °C.

__

Additional comment

We have rounded to tenths, because that is precision of the temperature given. If you use 273 as the conversion constant, you will get -172.4.