I need help Type th temperature (in Kelvin) in the left column and the volumes in the right column, being sure to keep pairs of data together. then click resize window to fit data.

the data appears to be
linear
quadratic
exponential
logarithmic​

Answer:

There are 23 electrons in Fe3+

Answer:

0.500-Molarity solution

Explanation:

The moles of the compound is given as the number of atomic mass unit in the compound. The moles of potassium nitrate in the solution are 0.6 mol

The molarity is the concentration unit, and it can be defined as the moles of compound present in the liter of solution.

The molarity can be expressed as:

\(\rm Molarity=\dfrac{Moles}{Volume(L)}\)

The given potassium nitrate solution has, molarity = 2 M

The volume of the solution is 0.3 L.

Substituting the values for the moles of the compound:

\(\rm 2\;M=\dfrac{Moles}{0.3\;L} \\\\Moles=2\;\times\;0.3\;mol\\Moles=0.6\;mol\)

The moles of potassium nitrate in 2 M solution is 0.6 mol.

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ANSWER

The volume of Argon gas is 5.60L

STEP-BY-STEP EXPLANATION:

Given information:

The number of atoms of argon = 1.5 x 10^23 atoms

To find the volume of Argon, we need to find the number of moles of argon, then, we assume the number of moles of argon to be x

To find the number of moles, we will need to apply the below formula

Recall that, Avogadro's number = 6.022 x 10^23

Since x represents the number of moles of argon gas, then, the mole of argon gas is 0.2498 mole.

The next step is to find the volume of Argon in liters

Recall that, at S.T.P, 1 mole is equivalent to 22.4L

Let x represent the volume in liters of argon

Then, this can be solved mathematically below

Therefore, the volume of Argon gas is 5.60L

Answer:

S5O10 (b)

Explanation:

Answer:

tectonic plates

Explanation:

Answer:

Cu + 2AgNo3 is the reactants

The question is incomplete, the complete question is;

A molecule that contains three identical polar bonds to the central atom will be ________.

nonpolar if the geometry is planar triangular

polar in all cases

nonpolar in all cases

impossible to tell the polarity

either polar or nonpolar depending on the identity of the atoms bonded to the central atom

Answer:

Nonpolar if the geometry is planar triangular

Explanation:

The polarity of molecules depends both on the polarity of individual bonds in the molecule as well as the overall dipole moment of the molecule. We must remember that dipole moment is a vector quantity hence direction of the resultant vector is very important.

Now, if i have a molecule that contains three identical polar bonds, a planar triangular geometry means that the molecule is symmetrical and will have an overall dipole moment of zero. Hence the molecule is nonpolar.

Answer: A

Explanation:

Charge cant be created or destroyed, it is only transferred between objects.

Answer:

And it's A

ok now make the first person brainiest

Explanation:

Hope this helps

The mean of the data set is approximately 4.0626, and the 90% confidence interval is [4.060925, 4.064275].

The sample mean (x) is calculated as follows:

x = (4.0620 + 4.0550 + 4.0650 + 4.0740 + 4.0550 + 4.0660) / 6

x ≈ 4.0626 (rounded to four decimal places)

The 90% confidence interval is calculated as follows;

Standard deviation (s):

(4.0620 - 4.0626)² = 0.00000036

(4.0550 - 4.0626)² = 0.00000576

(4.0650 - 4.0626)² = 0.00000006

(4.0740 - 4.0626)² = 0.00001328

(4.0550 - 4.0626)² = 0.00000576

(4.0660 - 4.0626)² = 0.00000012

average of the squared differences:

(0.00000036 + 0.00000576 + 0.00000006 + 0.00001328 + 0.00000576 + 0.00000012) / 6 ≈ 0.00000624

s = √(0.00000624)

s ≈ 0.002496

the standard error of the mean (SEM):

SEM = 0.002496 / √6

SEM ≈ 0.001018

For a 90% confidence interval, the z value is approximately 1.645.

ME = 1.645 * 0.001018 ≈ 0.001675

CI = x ± ME

CI = 4.0626 ± 0.001675

CI ≈ [4.060925, 4.064275]

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A substance's cooling curve is a graph representing the change in temperature over time as it is allowed to cool. The gradient of the cooling curve is influenced by the heat capacity, thermal conductivity, and ambient temperature of the material. The correct option is A.

The rate of cooling for a sample with a known composition is measured in order to map the phase boundaries on a phase diagram. As the sample (or some piece of it) starts to go through a phase change, the rate of cooling will alter. When the temperature-time curve changes slope, these "breaks" will be visible.

In the cooling curve, the graph never meet with the time axis.

Thus the correct option is A.

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Approximately 766.08 grams of oxygen are required to completely react with 240g of C₂H₆.

To determine the amount of oxygen required to completely react with 240g of C₂H₆ (ethane), we need to set up a balanced chemical equation for the combustion of ethane.

The balanced equation for the combustion of ethane is as follows:

C₂H₆ + O₂ → CO₂ + H₂O

From the balanced equation, we can see that the stoichiometric ratio between C₂H₆ and O₂ is 1:3. This means that for every one mole of C₂H₆, three moles of O₂ are required for complete combustion.

To calculate the amount of oxygen required, we need to convert the given mass of C₂H₆ to moles using its molar mass, and then use the stoichiometric ratio to determine the moles of O₂ required. Finally, we can convert the moles of O₂ back to grams using the molar mass of oxygen.

The molar mass of C₂H₆ is calculated as follows:

(2 x atomic mass of carbon) + (6 x atomic mass of hydrogen)

(2 x 12.01 g/mol) + (6 x 1.01 g/mol) = 30.07 g/mol

Now, we can proceed with the calculation:

Calculate the moles of C₂H₆:

moles of C₂H₆ = mass of C₂H₆ / molar mass of C₂H₆

moles of C₂H₆ = 240 g / 30.07 g/mol ≈ 7.98 mol

Determine the moles of O₂ using the stoichiometric ratio:

moles of O₂ = moles of C₂H₆ x (3 moles of O₂ / 1 mole of C₂H₆)

moles of O₂ = 7.98 mol x 3 ≈ 23.94 mol

Convert moles of O₂ to grams:

mass of O₂ = moles of O₂ x molar mass of O₂

mass of O₂ = 23.94 mol x 32.00 g/mol = 766.08 g

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To find moles when given the molar mass, you can use the concept of molar mass as a conversion factor.Molar mass represents the mass of one mole of a substance, expressed in grams per mole (g/mol).

To calculate moles, divide the given mass of the substance by its molar mass. The equation is:

moles = mass / molar mass

For example, if you have 56 grams of carbon dioxide (CO2) and want to find the number of moles, you need to know the molar mass of CO2, which is approximately 44 g/mol. Using the equation above:

moles = 56 g / 44 g/mol

moles ≈ 1.27 mol

Therefore, there are approximately 1.27 moles of carbon dioxide in 56 grams.

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Answer:

B. Holding a liquid that evaporates fast at room temperature

Explanation:

Beakers are useful as a reaction container or to hold liquid or solid samples. They are also used to catch liquids from titrations and filtrates from filtering operations. Laboratory Burners are sources of heat. Burets are for addition of a precise volume of liquid.

B. Holding a liquid that evaporates fast at room temperature

Answer:

1. more slowly than

2. larger than

3. weaker

Explanation:

Acetone molecules are bonded by very weak intermolecular forces when compared to that of the hydrogen bond between water molecules. This makes it very easy for acetone molecules to vaporize easily into its gaseous state, much more faster than water molecules (since the acetone molecules need a lesser amount of energy to break these bonds). Also, the boiling point of liquid acetone is much lower than that of water, meaning that it has a higher vapor pressure than that of water.

\(CS_{2}\) and \(CO_{3} ^{2-}\) adhere to the octet rule. The octet rule is a chemical rule of thumb based on the fact that atoms from the major group prefer to pair in this manner.

Each atom possesses eight electrons in its valence shell, giving it the same electrical configuration as a noble gas, according to the octet rule.  \(PCl_{5}\) is not acceptable octet rule. \(CO_{3} ^{2-}\) will meet the requirement as it has two extra electrons, giving it a -2 charge.  just follows the rules. Phosphorus pentachloride (\(PCl_{5}\)) and sulfur hexafluoride are two examples of chemicals that defy the octet rule (\(SF_{6}\)). Part B Consider the four molecules below. Which of these follows the octet rule and which does not? Drag the relevant objects to

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The complete question is:

Consider the following four molecules. Which of these satisfy the octet rule and which do not?

1) \(PCl_{5}\)

2) \(CS_{2}\)

3) \(SF_{6}\)

4) \(CO_{3} ^{2-}\)

Answer:

4.25 g of magnesium.

Explanation:

What is given?

moles of Na2CO3 = 0.0877 moles.

molar mass of Mg (magnesium) = 24.3 g/mol.

Step-by-step solution:

First, let's state the chemical equation between Mg (magnesium) and Na2CO3:

You can see that 1 mol of Na2CO3 reacts with 2 moles of Mg, so let's see how many moles of Mg are being produced by 0.0877 moles of Na2CO3:

And the final step is to convert from 0.175 moles of Mg to grams using its molar mass. The conversion will look like this:

The answer is that there is 4.25 g of magnesium dissolved in the solution of 0.0877 moles of Na2CO.

The change in the total energy of the system is -93.1kJ.

Let us note that the term thermodynamics has to do with the study of heat. Recall that heat is that which leads to the increase in the temperature of a body. From the first la of thermodynamics, we know that heat can neither be created nor destroyed but can be transformed from one form to another as we can see.

We also know from the first law of thermodynamics that;

ΔE = q + w

ΔE  = total internal energy

q = heat absorbed or evolved

w = work done

Let us find the work done as;

w =pΔV

w = 45.0 atm (3 - 8.8)

w = -261  atm L or -26.4 kJ

We have q as  -66.7 kJ  because heat was released

ΔE  = -66.7 kJ - 26.4 kJ

ΔE  = -93.1kJ

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Answer:

The answer should be A. Adding carbon to iron makes it tougher and stronger.

The addition of carbon atom to iron metal, enhances the property of hardness of metal.

Alloy is a compound which is formed by the mixture of two or more than two metals with different properties to make a new compound with better properties.

When we add carbon atom in the iron metal, it deviates the crystal lattice property of iron and makes it more harder. So, the content of carbon in the iron is directly proportional to the hardness of iron metal.

Hence, option (A) is correct i.e. hardness.

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Answer:

D: Particles exchange energy through elastic collisions.

Explanation:

took a test

The aspect of the kinetic-molecular theory and can be used to explain the behavior of plasmas is " Particles exchange energy through elastic collisions."

The assumption that matter being made up of microscopic particles which is always in motion forms the foundation of the kinetic-molecular theory, which describes the states of matter. This theory explains the characteristics and behaviors of gases, liquids, as well as solids that can be observed.

A collision among both two bodies that is elastic occurs when their combined kinetic energy stays constant.

The aspect of the kinetic-molecular theory and can be used to explain the behavior of plasmas is " Particles exchange energy through elastic collisions."

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Four Hydrogen atoms are present in the molecule (Furan) shown below.

Furan is a heterocyclic organic compound with a five-membered ring containing four carbon atoms and one oxygen atom. It has the chemical formula C4H4O. Furan is a colorless, volatile liquid with a distinctive aromatic odor. Coal tar and organic material burning make it.

Furan is utilised in resins, polymers, and solvents. Furan is poisonous and carcinogenic, hence its use and exposure must be carefully controlled.

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Answer:

We need more? What else is in the question? This is unanswerable.

Explanation:

Answer:

A balanced chemical reaction is an equation where the number of atoms of each type in the response is the same on both reactants and product sides.

Explanation: Burning, and cooking are two examples. :)

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Answer:C

Explanation:I took the test

Answer:

It is a south pole because the field lines enter the magnet at this end.

Explanation:

The manner in which the transfer of energy would be different if the bars were in an open system is as follows: Energy transfer would occur between the copper bars and the surroundings (option B).

The law of conservation of energy principle stating that energy may not be created or destroyed.

An isolated system exchanges neither energy nor matter with the surroundings. According to this question, two copper bars at different temperatures transfer energy until both are at the same temperature.

However, in an open system, some of the energy would be transferred to the surroundings.

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The question is missing information. Here is the complete question.

A gas at a pressure of 2.0 atm is in a closed container. Indicate the changes (if any) in its volume when the pressure undergoes the following changes at constant temperature and constant amount of gas. Match the words in the left with the column to the appropriate blanks in the sentences on the right. Make certain each sentence is complete before submitting your answer.

1. The pressure increases to 6.0 atm. The volume ________

2. The pressure drops to 0.40 atm. The volume _________

3. The pressure remains at 2.0 atm. The volume _________

Answer: 1. Decreases

2. Increases

3. Does not change

Explanation: According to the Ideal Gas Law, Pressure, Volume and Temperature of an ideal gas is related, as the following: PV = nRT.

In this case, since temperature (T) and amount of gas (n) are constant, the Boyle's Law can be used.

The law states that the volume of a given gas, under the conditios of temperature and amount of it are constant, is inversely proportional to the applied pressure: P₁.V₁ = P₂.V₂

Initial P (P₁) = 2

Initial V (V₁) = V

Final P (P₂) = 6

P₁.V₁ = P₂.V₂

2.V = 6.V₂

V₂ = 1/3V

When the pressure increases to 6 atm, volume decreases by 1/3.

P₁ = 2

V₁ = V

P₂ = 0.4

2.V = 0.4V₂

V₂ = 5V

When pressure drops to 0.4 atm, volume increases by 5.

Since there are no change in the pressure, the volume is the same from the beginning, so does not change.

Answer:

yes 4K + O2 ------>2K20 is true.