I’ll give brainliest if you can explain as well pls

Considering the definition of Avogadro's Number, 7.37×10²² moles of Cu are in a 3.56g sample of Cu?

The molar mass of substance is the amount of mass that a substance contains in one mole.

Avogadro's Number is the number of particles that make up a substance (usually atoms or molecules) in the amount of one mole of the substance. Its value is 6.023×10²³ particles per mole.

Avogadro's number applies to any substance.

The molar mass of Cu is 63.54 g/mole. The amount of moles of Cu can be calculated as:

amount of moles= 3.56 g÷ 63.54 g/mole

amount of moles= 0.056 moles

Now you can apply the following rule of three: 1 mole of the compound has 6.023×10²³ atoms, 0.056 mole contains how many atoms?

amount of atoms of Cu= (0.056 moles ×6.023×10²³ atoms)÷ 1

amount of atoms of Cu= 7.37×10²²

Finally, 7.37×10²² moles of Cu are present.

Learn more about Avogadro's Number:

brainly.com/question/11907018

#SPJ1

Comparing the four solutions above, the vapour pressure of a 0.4 M CH4 (methane) solution is lowest. This is due to the fact that a solution's vapour pressure is directly inversely proportional to the mole fraction of the solvent.

When the rate of evaporation and condensation are equal, the pressure that a substance's vapour exerts in a closed container is referred to as vapour pressure. It is an indicator of a substance's propensity to evaporate and is influenced by variables including temperature, surface area, and intermolecular forces. A substance with a higher vapour pressure will evaporate more quickly than a substance with a lower vapour pressure at a given temperature. Chemistry, physics, and material science are just a few of the scientific and engineering disciplines where vapour pressure is an important feature. It has significant effects on how liquids and gases behave, including boiling temperatures, distillation, and phase transitions.

Learn more about  vapour pressure here:

https://brainly.com/question/14123284

#SPJ4

Slime is a non-Newtonian fluid and does not have a molecular structure that can be considered polar or non-polar. The term "polarity" typically refers to the distribution of electrical charge within a molecule. In the case of slime, the material is made up of polymer molecules, which are long chains of repeating units. These polymer molecules interact with each other through hydrogen bonding, which gives the material its unique properties such as being a non-Newtonian fluid. However, these interactions are not based on polarity, so it is not appropriate to describe slime as being polar or non-polar.

Answer:

The polarity of slime molecules depends on the specific type of slime. There are many different types of slime, each made up of different types of molecules.

For example, if we consider a typical type of slime made from polyvinyl alcohol (PVA), the polarity of the PVA molecules will depend on their molecular structure and the type of bonding between the atoms. PVA is a synthetic polymer made up of repeating units of vinyl alcohol, which has a polar hydroxyl group (-OH). As a result, PVA is considered to be a polar molecule.

However, the overall polarity of a slime made from PVA will also depend on the other ingredients that are present, such as borax, which is often used as a cross-linking agent to form the slime. The overall polarity of the slime will also depend on the conditions it is in, such as the temperature, pH, and the presence of other substances that could affect the polarity of the slime.

In summary, the polarity of slime molecules can be complex and depends on the specific type of slime, the ingredients that make it up, and the conditions it is in.

Explanation:

Just tell me if you kinda confuse

ALLEN

Answer:

If benzene was shaken with bromine water, you would observe a slow reaction, as bromine water is a weak oxidizing agent. The reaction would result in the formation of bromobenzene, which is a yellow or reddish-brown solution.

This observation supports Kekulé's model of benzene's structure, as Kekulé proposed that benzene had alternating double bonds in its ring. This allows for the slow reaction with bromine water as the electrons in the double bonds can participate in the reaction to form bromobenzene. In contrast, if benzene had a structure with only single bonds, the reaction would occur more rapidly.

Explanation:

Tell me if you still confuse

ALLEN

The change in enthalpy (Δh) between the initial and final state is [tex]-48270 kJ[/tex]

The change in enthalpy (Δh) between the initial and final state can be calculated using the following equation:

Δ[tex]h = m (h2 - h1)[/tex]

where m is the mass of water vapor, h1 is the enthalpy of the initial state and h2 is the enthalpy of the final state.

Since the initial state is at 300 kPa and 200°C, the enthalpy of the initial state (h1) can be calculated using the steam tables. From the steam tables, the enthalpy of the initial state (h1) is 2760 kJ/kg.

The final state is at 175 kPa and a quality of 50%. The enthalpy of the final state (h2) can also be calculated using the steam tables. From the steam tables, the enthalpy of the final state (h2) is 1703 kJ/kg.

Now, the mass of water vapor (m) in the closed piston-cylinder device can be calculated using the ideal gas law equation.The following equation is the ideal gas law:

[tex]PV = mRT[/tex]

where R is the gas constant, T is the temperature, V is the volume, m is the mass, and P is the pressure.

Since the volume of the closed piston-cylinder device is 5 liters and the temperature is 200°C, the mass of the water vapor (m) can be calculated as follows:

[tex]m =\frac{ (300 kPa * 5 liters)}{ (0.287 *323.15 K)}[/tex]

Therefore, the mass of the water vapor (m) is 41.6 kg.

Finally, the change in enthalpy (Δh) between the initial and final state can be calculated using the equation given above. Thus,

Δ[tex]h = 41.6 (1703 - 2760) = -48270 kJ[/tex]

Therefore, the change in enthalpy (Δh) between the initial and final state

is [tex]-48270 kJ[/tex].

learn more about enthalpy Refer:brainly.com/question/13996238

#SPJ4

The temperature is increasing the three degrees.

The enthalpy of a reaction, also known as the heat of reaction, can be affected by changes in temperature. Enthalpy is a measure of the total energy in a system, including both heat and internal energy.

In a chemical reaction, the enthalpy change is the heat absorbed or released during the reaction, which can be measured as the temperature change of the system. When the temperature of a reaction increases, the enthalpy of the system will increase, and when the temperature decreases, the enthalpy of the system will decrease.

Learn more about enthalpy:https://brainly.com/question/13996238

#SPJ1

Chemical formula of one compound formed by the combination of K+ ions with one of these ions as water completely evaporates from the seawater sample is KCl( Poassium Chloride).

Potassium chloride is an ionic compound that contains the ions K+ and Cl-. The K+ ions and Cl- ions create an ionic connection when the water evaporates from the saltwater sample. Because the K+ and Cl- ions are attracted to each other, the bond forms when the two ions create a symmetrical configuration.

The process of ionic bonding is a key aspect of seawater chemistry. Several dissolved ions are found in seawater, including K+, Na+, Ca2+, and Mg2+. The dissolved ions get concentrated when the water evaporates and interact with other ions to create compounds. In the case of KCl, the K+ ions will create an ionic connection with the Cl- ions, which is a strong bond that binds the two ions together.

For more such questions on ions, click on:

https://brainly.com/question/14511468

#SPJ4

The process requires more energy: is completely vaporizing 1 kg of saturated liquid water at 1 atm pressure.

The The process requires more energy: is completely vaporizing 1 kg of saturated liquid water at 1 atm pressure. This is because  from the latent heat of vaporization of the each system. For the system 1, saturated the water at 1 atm, the latent heat of vaporization is equal to 40.7 kJ per mole and for, at 8 atm, the latent heat of vaporization is equal to 36.4 kJ per mole.

Thus, the completely vaporizing 1 kg of saturated liquid water at 1 atm pressure requires the more energy.

To learn more about saturated here

https://brainly.com/question/12976073

#SPJ4

An ionic compound will dissolve when the attraction between the polar molecules and the ions is greater than the attraction between the ions themselves.

Polar motes A polar patch is generally formed when the one end of the patch is said to retain more positive charges and whereas the contrary end of the patch has negative charges, creating an electrical pole. When a patch is said to have a polar bond, also the centre of the negative charge will be on one side, whereas the centre of positive charge will be in the different side. The entire patch will be a polar patch.

Ion, any snippet or group of tittles that bears one or further positive or negative electrical charges. appreciatively charged ions are called cations; negatively charged ions, anions. Ions are formed by the addition of electrons to, or the junking of electrons from, neutral tittles or motes or other ions.

Learn more about Ionic compound:

https://brainly.com/question/29348041

#SPJ4

In order to generate the same amount of heat as 1 mole of H2O, approximately 2 moles of H2S must be condensed.

A colourless gas noted for its strong "rotten egg" smell at low concentrations is hydrogen sulphide. It is exceedingly poisonous and combustible.

Compared to hydrogen sulphide, one mole of water requires about 40.7 kJ/mol of enthalpy to vaporise.

To produce the same amount of heat, more hydrogen sulphide must condense into water. Because water has a higher enthalpy of vaporisation than hydrogen sulphide, this happens.

Hence, around two moles of hydrogen sulphide will give the heat produced as one mole of water produces.

Learn more about H2S:

https://brainly.com/question/29460207

The complete question is-

the table above provides the values for some physical properties of h2s and h2o . approximately, how many moles of h2s must be condensed to release as much heat as would be released when 1 mole of h2o is condensed? responses

0.0174 M is the calculated [H₃O+] for 0.0087 M H₂SO₄.  Molarity is an important concept in chemistry.

Molarity, which is defined as the number of moles of solute dissolved per liter of solution, is a measure of a solution's concentration. It is often written with the symbol "M" and is measured in moles per liter (mol/L) units.

The molarity of a solution is determined by dividing the volume of the solution in liters by the number of moles of the solute present in that volume. because it allows us to quantify the amount of substance present in a solution. It is frequently used in stoichiometric calculations to determine the amounts of a chemical reaction's reactant and product that should be known. For instance, if a solution contains 2 moles of solute dissolved in 1 liter of solution, the molarity of the solution is 2 mol/L.

Because it fully dissociates in water, H₂SO₄ is a powerful acid that produces two H+ ions for every molecule that dissociates. As a result, the [H₃O+] in a solution of 0.0087 M H₂SO₄ is twice as molten as the H₂SO₄ solution: [H₃O+] = 2 x [H+] = 2 x 0.0087 M = 0.0174 M.

Accordingly, the [H₃O+] of a H₂SO₄ solution containing 0.0087 M is 0.0174 M.

Learn more about Molarity:

brainly.com/question/14469428

#SPJ1

The volume in liters, of 0.250 mole of oxygen gas at 20.0 C and 0.974 atm of pressure is 6.174L.

The volume of a substance can be calculated by using Avogadro's law equation as follows:

PV = nRT

Where;

According to this question, a 0.250 mole of oxygen gas at 20.0 C and 0.974 atm of pressure. The volume of the gas is calculated as follows:

0.974 × V = 0.250 × 293 × 0.0821

0.974V = 6.013825

V = 6.174L

Learn more about volume at: https://brainly.com/question/11676583

#SPJ1

Answer:

The EF of the compound is CH2O and the MF is C6H12O6.

Explanation:

To find the empirical formula (EF) of the compound, we need to determine the simplest whole number ratio of the atoms in the compound. We can assume we have 100 g of the compound, which means we have:

40 g of carbon

6.67 g of hydrogen

53.33 g of oxygen (since the rest of the compound is oxygen)

Next, we can convert the masses to moles:

Moles of carbon = 40 g / 12.01 g/mol = 3.33 mol

Moles of hydrogen = 6.67 g / 1.01 g/mol = 6.61 mol

Moles of oxygen = 53.33 g / 16.00 g/mol = 3.33 mol

We then divide each of the mole values by the smallest number of moles, which is 3.33, to get the simplest whole number ratio:

Carbon: 3.33 / 3.33 = 1

Hydrogen: 6.61 / 3.33 = 1.98 (rounded to 2)

Oxygen: 3.33 / 3.33 = 1

So the EF of the compound is CH2O.

To find the molecular formula (MF), we need to know the molecular mass of the EF. The empirical formula mass (EFM) of CH2O is:

EFM = (1 x 12.01 g/mol) + (2 x 1.01 g/mol) + (1 x 16.00 g/mol) = 30.03 g/mol

We can then calculate the molecular formula mass (MFM) by dividing the given molecular mass (180 g/mol) by the EFM:

MFM = 180 g/mol / 30.03 g/mol = 6

This means the MF is 6 times the EF, or C6H12O6. Therefore

The molar ratio of Mg reacted to H2 produced is 1:1. This means that for every mole of Mg that reacts, one mole of H2 is produced. The stoichiometric ratio between the Mg ribbon reactant and the hydrogen gas product is also 1:1.

This ratio is determined by the balanced chemical equation for the reaction between Mg and HCl, which is Mg + 2HCl → MgCl2 + H2. The coefficients in this equation represent the number of moles of each reactant and product that are involved in the reaction. The coefficient for Mg is 1, indicating that one mole of Mg reacts with two moles of HCl to produce one mole of H2 and one mole of MgCl2.

The stoichiometric ratio is important because it allows us to determine the number of reactants or products needed in a reaction. For example, if we know the amount of Mg we have, we can use the stoichiometric ratio to calculate the amount of H2 that will be produced. Similarly, if we know the amount of H2 we need, we can use the stoichiometric ratio to determine how much Mg we need to react with HCl to produce the required amount of H2.

Learn more about stoichiometric ratio

brainly.com/question/28297916

#SPJ4

The formula for Iron (III) oxide is Fe2O3, which means that there are 2 iron atoms and 3 oxygen atoms in one molecule of Fe2O3.

What do you mean by molecules?

A molecule is a group of two or more atoms held together by chemical bonds. These atoms can be of the same or different types. Molecules are the smallest units of a compound that retain the chemical and physical properties of that compound.

Molecules play a critical role in many chemical reactions and biological processes. They can interact with each other through chemical reactions to form new compounds or release energy. Understanding the structure and behavior of molecules is fundamental to understanding many fields of science, including chemistry, biochemistry, and materials science.

The formula for Iron (III) oxide is Fe2O3, which means that there are 2 iron atoms and 3 oxygen atoms in one molecule of Fe2O3.

To find the number of moles of oxygen atoms in 1 mole of Fe2O3, we need to multiply the number of oxygen atoms per molecule by the Avogadro constant (6.022 x 10^23).

Number of moles of oxygen atoms in 1 mole of Fe2O3 = 3 x (6.022 x 10^23) = 1.8066 x 10^24

Therefore, there are 1.8066 x 10^24 oxygen atoms in 1 mole of Fe2O3.

Learn more about moles of oxygen click here:

https://brainly.com/question/29499360

#SPJ1

The theoretical yield of PCl₃ produced from the reaction of 62.54 g of Cl₂ with 12.39 g of P is 54.93 g.

To determine the theoretical yield of PCl₃ produced from the reaction of 62.54 g of Cl₂ with 12.39 g of P, we first need to write a balanced chemical equation for the reaction:

P + 3Cl₂ → PCl₃

From the balanced equation, we can see that 1 mole of P reacts with 3 moles of Cl₂ to produce 1 mole of PCl₃. Therefore, we need to convert the given masses of Cl₂ and P into moles using their respective molar masses:

Molar mass of Cl₂ = 35.45 g/mol

Molar mass of P = 30.97 g/mol

Number of moles of Cl₂ = 62.54 g / 35.45 g/mol = 1.764 mol

Number of moles of P = 12.39 g / 30.97 g/mol = 0.400 mol

The limiting reactant in this reaction is P, since it produces less moles of product than Cl₂. Therefore, we will use the number of moles of P to determine the theoretical yield of PCl₃:

Number of moles of PCl₃ = 0.400 mol

To convert the number of moles of PCl₃ to grams, we use its molar mass:

Molar mass of PCl₃ = 137.33 g/mol

The theoretical yield of PCl₃ produced is:

Theoretical yield of PCl₃ = 0.400 mol × 137.33 g/mol = 54.93 g

Therefore, the theoretical yield of PCl₃ produced from the reaction of 62.54 g of Cl₂ with 12.39 g of P is 54.93 g.

Learn more about phosphorus trichloride here: brainly.com/question/15585818

#SPJ4

The electron gain enthalpy of Na+ is 5.65 eV.

The amount of energy released when an electron is added to a single gaseous atom is known as the electron gain enthalpy. Energy can either be released or absorbed when an electron is added.

The electron gain enthalpy of Na+ can be calculated using the formula below:

Electron gain enthalpy of Na+ = Ionization enthalpy of Na - Electron affinity of Na

The ionization enthalpy of Na is 5.1 eV.

The electron affinity of Na is -0.55 eV.

Therefore, the electron gain enthalpy of Na+ can be calculated as:

Electron gain enthalpy of Na+ = Ionization enthalpy of Na - Electron affinity of Na

Electron gain enthalpy of Na+ = 5.1 eV - (-0.55 eV)

Electron gain enthalpy of Na+ = 5.65 eV

Learn more about electron affinity at: https://brainly.com/question/977718

#SPJ1

The atomic radius of magnesium is approximately 1.736 Å. This can be calculated using the formula: Atomic Radius = (a / 2) * sqrt(3), where a is the lattice parameter for the hcp crystal structure.

To calculate the atomic radius of magnesium, we can use the following formula:

Density = (2 * Atomic Mass) / [(a²) * (c / a) * Na]

where:

Density is the density of magnesium
Atomic Mass is the atomic mass of magnesium
a is the lattice parameter for the hcp crystal structure
c/a is the ratio of the height of the unit cell to the base length of the unit cell
Na is Avogadro's number
We can rearrange this formula to solve for the atomic radius:

Atomic Radius = (a / 2) * sqrt(3)

where:

a is the lattice parameter for the hcp crystal structure
Now, let's plug in the values given in the problem:

Density = 1.74 g/cm3
c/a = 1.624
Na = 6.022 x 10²³ molecules/mol

The atomic mass of magnesium is 24.305 g/mol.

To find the lattice parameter, we can use the fact that the volume of the unit cell is given by:

Volume = a² * (c / a) * sqrt(3) / 2

The density is also related to the volume and the atomic mass by:

Density = Atomic Mass / Volume

We can combine these two equations and solve for a:

a = (4 * Atomic Mass / (sqrt(3) * Density * c))⁽¹/³⁾

Plugging in the values:

a = (4 * 24.305 g/mol / (sqrt(3) * 1.74 g/cm^3 * 1.624))⁽¹/³⁾
a = 3.209 Å

Now we can calculate the atomic radius:

Atomic Radius = (a / 2) * sqrt(3)

Atomic Radius = (3.209 Å / 2) * sqrt(3)

Atomic Radius = 1.736 Å (rounded to three significant figures)

Therefore, the atomic radius of magnesium is approximately 1.736 Å.

Learn more about magnesium atoms here: brainly.com/question/26477621

#SPJ4

The two rings that have approximately the same bond angle in their favored conformations are cyclopropane and cyclopropane. The rings that sacrifice bond angle to relieve torsional strain are cyclopropane and cyclobutane.

Bond angle strain is a type of steric interaction.

A cyclic ring is a closed chain of atoms, typically carbon, that forms a loop or ring structure. Cyclic rings are commonly found in organic molecules, and the properties and behavior of cyclic rings can vary depending on their size, shape, and composition.

Cyclic rings can be classified based on the number of atoms in the ring, with three-membered rings known as cyclopropanes, four-membered rings known as cyclobutanes, five-membered rings known as cyclopentanes, six-membered rings known as cyclohexanes, and so on. The stability and reactivity of cyclic rings can also be affected by the presence of functional groups and the stereochemistry of the ring.

Learn more about cyclic rings here: brainly.com/question/30510120

#SPJ4

From the information provided, the percent error in the experimentally determined value for the enthalpy of formation of MgO is 1.96%

To determine the percent error in the experimentally determined value for the enthalpy of formation of MgO, we need to compare the experimental value to the accepted or theoretical value.

The accepted value for the enthalpy of formation of MgO is: -601.8kJ/mol. Let's assume that the experimentally determined value is -590.0 kJ/mol.

The percent error can be calculated using the following formula:

Percent error = |(Experimental value - Theoretical value) / Theoretical value| x 100%

Substituting the values, we get:

Percent error = |(-590.0 kJ/mol - (-601.8 kJ/mol)) / (-601.8 kJ/mol)| x 100%

Percent error = |(11.8 kJ/mol) / (601.8 kJ/mol)| x 100%

Percent error = 1.96%

Learn more about percent error here: brainly.com/question/5493941

#SPJ4

The 40%  is the percentage of oxygen in the vessel.

What is pressure ?

As force applied per unit area, pressure is defined. P=FA, where F is the force operating perpendicular to the surface area A, gives it mathematical expression. The pascal (Pa), which equates to a newton per square metre (N/m 2), is the accepted unit of pressure.

What is partial pressure ?

The idea of partial pressure arises from the fact that each individual gas contributes a portion of the total pressure, and that portion is the partial pressure of that gas. In order to describe all the pieces, it is essentially like taking a percentage or fraction of the whole.

Therefore, The 40%  is the percentage of oxygen in the vessel.

Learn more about pressure from the given link.

https://brainly.com/question/28012687

#SPJ1

15.6g of potassium would produce 1 mole of potassium oxide 15.6g K + 0.8 mol O2 → 1.2 mol K2O.

Potassium is an essential mineral that plays an important role in a number of bodily functions. It is a type of electrolyte that helps regulate the body's water balance, acid-base balance, and heart rate. It also helps to maintain healthy muscle and nerve function, as well as normal blood pressure. Potassium can be found in many foods, including fruits, dairy products, legumes, nuts, and leafy green vegetables.

Assuming you had unlimited oxygen, 15.6g of potassium would produce 1 mole of potassium oxide (K2O). This is because the molar mass of potassium oxide is 94.2 g/mol and there are 2 moles of oxygen for every 1 mole of potassium in the reaction equation: K + O2 → K2O.
Therefore, 15.6g of potassium would produce 1 mole of potassium oxide, which can be calculated as follows:
15.6g K / (39.1g K/mol) = 0.4 mol K
0.4 mol K x (2 mol O2/1 mol K) = 0.8 mol O2
0.4 mol K + 0.8 mol O2 = 1.2 mol K2O
Therefore, the answer is:
15.6g K + 0.8 mol O2 → 1.2 mol K2O

To learn more about potassium
https://brainly.com/question/25380525
#SPJ1

24 g of pure CO2 are exhaled by the individual. To calculate the number of moles, divide the outcome by the molar mass. As a result, the individual exhales about 0.55 moles of carbon dioxide every hour.

During aerobic cellular respiration, the interaction of glucose and oxygen results in the production of ATP that the cell can utilize.

As by-products, water and carbon dioxide are produced. The general formula for aerobic cellular respiration is: During cellular respiration, oxygen and glucose combine to create ATP.

CO2 is converted to glucose during photosynthesis, and H2O is oxidized to produce oxygen. Cellular respiration involves the reduction of oxygen and the oxidation of glucose to produce CO2 and water.

CO2 is carried by the bloodstream to the lungs, where it is eventually exhaled out of the body.

Therefore, Hence Number of moles glucose, C6H12O6 = 100g/180g = 0.55 moles.

Learn more about glucose here:

https://brainly.com/question/8394646

#SPJ1

The total amount of heat required to evaporate hundred gram of liquid Ammonia at its boiling point is found to be 28 KJ.

The enthalpy of vaporization from liquid ammonia is given to be 4.8 kilo joule per mole.

The mass of the liquid ammonia is 100 grams.

The formula to find the amount of heat required to evaporate this ammonia is given by,

Q = nL

Where, m is the moles of ammonia and L is the latent heat of vaporization.

Putting all the values,

Q = 100/17 x 4.8 KJ/mol

Q = 28 KJ

So, a total of 28 kilo joules of energy will be required to evaporate these ammonia.

To know more about heat of vaporization, visit,

https://brainly.com/question/26306578#:~:text=Expert%2DVerified%20Answer&text=The%20heat%20absorbed%20by%20the,vaporize%201%20gram%20of%20liquid.

#SPJ4

Answer:

The Lewis structure for potassium chloride (KCl), which is an ionic compound, cannot be represented by a single Lewis structure. Ionic compounds do not have a covalent bond, instead they have an electrostatic attraction between positive and negative ions. In the case of potassium chloride, potassium (K) has a charge of +1 and chloride (Cl) has a charge of -1. The ionic compound can be represented by showing the positive and negative ions next to each other, separated by a dash or an arrow, like this:

K+ Cl-

Explanation:

Alternatively, it can be represented by a crystal lattice structure, which shows the repeating pattern of positive and negative ions in the solid compound.

The compound interest for two months will be $13.98. Then, after two months, there will be $ 4213.98 in the account.

Compound interest is the interest on normal interest. Compound interest for an amount p for a n years with a rate of interest R% can be calculated as follows:

A  = P [1 + r/100]ⁿ

Given that, the amount  p = $4200

rate of compound interest  = 2.1 %

time period n = 2 months, it is 0.16 years.

Now the compound interest for two months = $ 4200× [1 + 2.1/100]^0.16 - $4200 = $13.98

Now, the amount after two months will be $ 4213.9.

Therefore, there will be $4213.9 in the account after two months.

Find more on compound interest :

https://brainly.com/question/26457073

#SPJ1

Answer:

3.4 (2/5) (sorry i dont have a calculator )

Explanation:

3.4 moles of O2 x (2 moles of P2O5/5 moles of O2)

= 3.4 (2/5)

A compound which has molar mass 123.22g/mol will have a molecular formula as ZrO₂. so the correct option is D.

We need to know the empirical formula of the compound and the quantity of empirical formula units in the molecular formula in order to determine the molecular formula of a substance with a certain molar mass.

The mass of a certain molecule is its molecular mass, which is expressed in daltons. Because they contain various isotopes of an element, multiple molecules of the same substance can have distinct molecular weights.

A) Co₂H₄:

Co: 2 x 58.93 = 117.86

H: 4 x 1.01 = 4.04

Total: 121.9 g/mol

B) PSF:

P: 1 x 30.97 = 30.97

S: 1 x 32.06 = 32.06

F: 1 x 18.99 = 18.99

Total: 82.02 g/mol

C) SrS₃:

Sr: 1 x 87.62 = 87.62

S: 3 x 32.06 = 96.18

Total: 183.8 g/mol

D) ZrO₂:

Zr: 1 x 91.22 = 91.22

O: 2 x 16.00 = 32.00

Total: 123.22 g/mol

The number of empirical formula units in the molecular formula can now be determined by dividing the supplied molar mass by the empirical formula weight:

A)Co₂H₄: 123.22 / 121.9 = 1.01, meaning that the molecular formula and the empirical formula,Co₂H₄, are nearly identical.

B) PSF: 123.22 divided by 82.02 equals 1.50, which means the molecular formula is 1.5 times the empirical formula and can be rounded to PS3F3PS₃F₃.

CSrS₃: 123.22 / 183.8 = 0.67, which means that the molecular formula is equal to 0.67 times the empirical formula, or  SrS₂.

D) ZrZrO₂2: Because the molar mass and empirical formula weight are already equal, the molecular formula, ZrO₂, is also the empirical formula.

Consequently, D) ZrO2rO₂ is the chemical formula for the substance with a molar mass of 123.22 g/mol.

Learn more about molecular formula here:

brainly.com/question/28647690

#SPJ4

The molar mass and the mole ratio from the reaction equation B. 305.9 grams Al2O3

Molar mass is a physical property of a chemical compound, defined as the mass of a given substance divided by the amount of substance measured in moles. It is expressed in g/mol and is numerically equal to the average atomic weight of the atoms in the compound. Molar mass is used to calculate the mass of a given amount of a substance, as well as to determine the relative atomic mass of an element.

The molar mass of aluminum is 26.98 g/mol, and the molar mass of aluminum oxide is 101.96 g/mol. Using the molar mass and the mole ratio from the reaction equation, we can calculate the amount of Al2O3 produced.
6.000 mol Al x (2 mol Al2O3/3 mol Al) x (101.96 g Al2O3/1 mol Al2O3) = 305.9 g Al2O3

To learn more about molar mass
https://brainly.com/question/837939
#SPJ1