Indicate which element of the following pairs has the greater electronegativity

The first step is to calculate the volume of the metal cylinder. This can be found by subtracting the final volume of water (48.3 mL) from the initial volume of water (25.2 mL), giving a volume of 23.1 mL. This volume is equivalent to 23.1 cm³ because 1 mL = 1 cm³.

The next step is to calculate the density of the metal. We know the mass of the metal cylinder (101.356 g), so we can divide this by its volume (23.1 cm³): density = mass/volume density = 101.356 g/23.1 cm³density = 4.39 g/cm³. We were given the mass of an unknown metal cylinder as 101.356 g and the initial volume of water as 25.2 mL. Upon immersion of the metal cylinder in the graduated cylinder, the water level rose to 48.3 mL. To determine the density of the metal cylinder, we need to find the volume of the cylinder. We can calculate the volume of the metal cylinder by finding the difference between the final and initial volumes of water. This gives us a volume of 23.1 mL. This volume is equivalent to 23.1 cm³ since 1 mL is equivalent to 1 cm³.To calculate the density of the metal cylinder, we divide the mass of the cylinder by its volume. This gives us a density of 4.39 g/cm³. Therefore, the unknown metal cylinder has a density of 4.39 g/cm³.

The density of the metal cylinder can be found by dividing its mass by its volume. In this case, we were given the mass of the cylinder and the initial and final volumes of water, so we used the difference between these volumes to find the volume of the cylinder. Dividing the mass by the volume gave us a density of 4.39 g/cm³ for the metal cylinder.

To learn more about density click:

brainly.com/question/29775886

#SPJ11

Answer: 1. physical 2. Reversible

Gallium melting into its liquid form (at 30°C) is an example of a physical change and they're reversible.

In conclusion, chemical changes bring about a change in substance into a substance that's entirely different.

Read related link on:

https://brainly.com/question/19046658

Answer:

13 if Im right?

Explanation:

Before any HBr is added, the pH is approximately 5.23. After the addition of HBr, the pH becomes 1.00, which remains constant throughout subsequent additions of HBr.

To calculate the pH at different stages of the titration between pyridine (C5H5N) and HBr, we need to consider the reaction between the weak base pyridine and the strong acid HBr. Pyridine acts as a base and accepts a proton (H+) from HBr, forming the conjugate acid of pyridine (C5H5NH+).

Before any HBr is added:

Since pyridine is a weak base, we can consider the initial solution as a basic solution. The pH can be calculated using the pKb of pyridine:

pKb = -log(Kb) = -log(1.7×10^(-9)) ≈ 8.77

pH = 14 - pKb ≈ 14 - 8.77 ≈ 5.23

After addition of 12.5 mL of HBr:

The volume of the solution has increased to 25.0 mL + 12.5 mL = 37.5 mL. We can assume that the HBr completely reacts with pyridine, forming its conjugate acid. Since HBr is a strong acid, we can consider the solution as acidic.

pH = -log[H+] = -log(0.100 M) = 1.00

After addition of 23.0 mL of HBr:

The volume of the solution is now 25.0 mL + 23.0 mL = 48.0 mL. Again, we assume complete reaction of HBr with pyridine.

pH = -log[H+] = -log(0.100 M) = 1.00

After addition of 25.0 mL of HBr:

The volume of the solution is now 25.0 mL + 25.0 mL = 50.0 mL. Complete reaction of HBr with pyridine is assumed.

pH = -log[H+] = -log(0.100 M) = 1.00

After addition of 34.0 mL of HBr:

The volume of the solution is now 25.0 mL + 34.0 mL = 59.0 mL. Complete reaction of HBr with pyridine is assumed.

pH = -log[H+] = -log(0.100 M) = 1.00

In summary:

- Before any HBr is added: pH ≈ 5.23

- After addition of 12.5 mL of HBr: pH = 1.00

- After addition of 23.0 mL of HBr: pH = 1.00

- After addition of 25.0 mL of HBr: pH = 1.00

- After addition of 34.0 mL of HBr: pH = 1.00

To learn more about Pyridine click here: brainly.com/question/32565523

#SPJ11

The command that allows moving a file from one location to another is the "mv command".

The mv command renames or transfers files and folders from one directory to another. A file or directory keeps its base file name when moved to a new directory. All links to other files are preserved when you transfer a file, with the exception of when you move it to a different file system. A directory and its contents are added beneath the existing directory when you transfer a directory into it.

The TargetDirectory option of the mv command allows you to provide a new file name or a new directory path name when renaming a file or directory.

To knwo more about mv command

https://brainly.com/question/30737863

#SPJ11

The molar mass of the protein is approximately 74,426 g/mol. Since none of the provided answer choices match exactly, it seems there might be a mistake in the options given.

To determine the molar mass of the protein, we can use the formula for osmotic pressure:

π = (n/V)RT

Where π is the osmotic pressure, n is the number of moles of solute, V is the volume of the solution, R is the ideal gas constant, and T is the temperature in Kelvin.

Given that the osmotic pressure is 2.88 mmHg, we need to convert it to atm by dividing it by 760 mmHg/atm:

π = 2.88 mmHg / 760 mmHg/atm = 0.00379 atm

The volume of the solution is 50.0 mL, which needs to be converted to liters:

V = 50.0 mL / 1000 mL/L = 0.0500 L

The temperature is given as 25 degrees Celsius, which needs to be converted to Kelvin:

T = 25 degrees Celsius + 273.15 = 298.15 K

Plugging these values into the osmotic pressure equation and rearranging to solve for the number of moles of solute:

n = (πV) / (RT)

n = (0.00379 atm * 0.0500 L) / (0.0821 L·atm/(mol·K) * 298.15 K)

n = 0.000305 mol

The molar mass of the protein can be calculated by dividing the mass of the protein by the number of moles:

Molar mass = mass / moles

Molar mass = 22.7 mg / 0.000305 mol

Molar mass = 74,426 g/mol

To learn more about osmotic pressure click here:

brainly.com/question/29819107

#SPJ11

We can use the M1V1 = M2V2 equation to calculate the volume required to dilute 0.400 L of a 13.0 M NaOH solution to obtain a 3.00 M NaOH solution.M1V1 = M2V2 equation,M1V1 = M2V2V1 = (M2 × V2)/M1

In this scenario:M1 = 13.0 M, V1 = 0.400 L, M2 = 3.00 M. We can put these values into the M1V1 = M2V2 equation and solve for

V2:V2 = (M1 × V1)/M2V2 = (13.0 M × 0.400 L)/3.00 MV2 = 1.73 L

To determine the volume required to dilute 0.400 L of a 13.0 M NaOH solution to a 3.00 M NaOH solution, we can use the M1V1 = M2V2 equation. The formula tells us that the initial concentration and volume, as well as the final concentration and volume, are proportional.If we look at the equation, we can observe that the final volume (V2) is proportional to the initial volume (V1) and the ratio of the initial and final concentrations (M1/M2). We substitute the values given in the problem into the equation and solve for V2:V2 = (M1 × V1)/M2V2 = (13.0 M × 0.400 L)/3.00 MV2 = 1.73 L Therefore, to dilute 0.400 L of a 13.0 M NaOH solution to a 3.00 M NaOH solution, 1.73 L of water must be added to the solution.

We can conclude that to prepare a 3.00 M NaOH solution from a 13.0 M NaOH solution, 1.73 L of water should be added to 0.400 L of 13.0 M NaOH solution.

To learn more about final concentration visit:

brainly.com/question/28973308

#SPJ11

Answer: No, the noble gases are

Explanation:

Answer:

The most stable electron configuration is that of a noble gas, due to the fact that its valence shell is filled. For helium, that means two valence electrons (a duet) in the 1s sublevel, and for the rest it means eight valence electrons (an octet) in the outermost s and p sublevels.

the molecular weight of average polypropylene chains with a degree of polymerization of 6500 is 273,000 g/mol.

To calculate the molecular weight of polypropylene chains, we need to know the molecular weight of a single monomer unit (mer) and the degree of polymerization.

Given:

Degree of polymerization = 6500

The molecular weight of a single monomer unit of polypropylene (mer) is approximately 42 g/mol. Therefore, we can calculate the molecular weight of the polymer chains as follows:

Molecular weight of polypropylene chains = Molecular weight of a single monomer unit × Degree of polymerization

Molecular weight of polypropylene chains = 42 g/mol × 6500

Molecular weight of polypropylene chains = 273,000 g/mol

To know more about polypropylene visit:

brainly.com/question/28158007

#SPJ11

At the anode, chlorine gas (Cl2) is formed, while at the cathode, sodium metal (Na) is formed in the electrolysis of a molten mixture of NaCl and CaBr2.

In the electrolysis of a molten mixture of NaCl and CaBr2, the products formed at the anode and cathode depend on the individual reactions occurring at each electrode. At the anode, chloride ions (Cl-) from NaCl and bromide ions (Br-) from CaBr2 are discharged. Chloride ions are more easily oxidized than bromide ions, so they tend to be preferentially discharged. At the anode, chloride ions lose electrons and form chlorine gas (Cl2). This reaction is represented as: 2Cl- (aq) → Cl2 (g) + 2e-

At the cathode, sodium ions (Na+) from NaCl and calcium ions (Ca2+) from CaBr2 are discharged. Sodium ions are more easily reduced than calcium ions, so they are preferentially discharged. At the cathode, sodium ions gain electrons and form sodium metal (Na). This reaction is represented as: 2Na+ (aq) + 2e- → 2Na (l)

Calcium ions (Ca2+) from CaBr2 are not reduced at the cathode due to their higher reduction potential compared to sodium ions.

To learn more about electrolysis click here:

brainly.com/question/12994141

#SPJ11

Explanation:

C they would be arranged in a bent Orientation

Answer:

B

Explanation:

They would be arranged in a trigonal planar orientation.

Approximately 67.8 mL of 3.50 M HCl(aq) is required to react with 4.75 g of Zn(s).

To calculate the volume of 3.50 M HCl(aq) required to react with 4.75 g of Zn(s), we need to use the stoichiometry of the balanced chemical equation.

By converting the mass of Zn to moles using its molar mass, and then using the mole ratio between Zn and HCl, we can determine the volume of HCl required. In this case, the volume of 3.50 M HCl(aq) needed is approximately 67.8 mL.

First, we need to determine the number of moles of Zn(s) using its molar mass. The molar mass of Zn is 65.38 g/mol:

moles of Zn = mass of Zn / molar mass of Zn

moles of Zn = 4.75 g / 65.38 g/mol

Next, we use the balanced chemical equation to establish the mole ratio between Zn and HCl. From the equation Zn(s) + 2HCl(aq) ⟶ ZnCl2(aq) + H2(g), we can see that the ratio is 1:2:

moles of HCl = 2 * moles of Zn

Now, we can calculate the volume of 3.50 M HCl(aq) needed using the concentration and the moles of HCl:

moles of HCl = volume of HCl * concentration of HCl

Rearranging the equation to solve for the volume:

volume of HCl = moles of HCl / concentration of HCl

Substituting the known values:

volume of HCl = (2 * moles of Zn) / 3.50 M

Calculating the volume:

volume of HCl = (2 * 4.75 g / 65.38 g/mol) / 3.50 M

volume of HCl ≈ 67.8 mL

Therefore, approximately 67.8 mL of 3.50 M HCl(aq) is required to react with 4.75 g of Zn(s).

To learn more about concentration click here:

brainly.com/question/30862855

#SPJ11

g = 19.6 N/2.2 kg. g = 8.9 m/s2. 7.

The weight an object experience is the product of its mass and gravity. Hence, the package which weighs 19.6 Newtons in earth has a mass of 2 Kg.

Gravitational force is a kind of force by which an object attracts other objects into its center of mass. We are all standing on earths surface because of the gravitational pull by earth.

The gravitational force acting on an object depends on its mass and the distance to the object. Therefore, the gravity experienced by each object with different masses or placed at different distances will be different at all.

The weight that's an object have in  earth is the product of its mass which is a constant and the acceleration due to gravity that is 9.8 m/s². Thus the object weighing 19.6 has the mass:

mass = 19.6 /9.8

         = 2 Kg.

Where one newton is one Kg m/s². Hence, the mass of the package in earth is 2 Kg.

To find more on  gravity, refer here:

https://brainly.com/question/4014727

#SPJ2

Answer:

Magnetism is the force of attraction on a magnetic substance by a magnet.

Explanation:

Please mark as brainliest.

Answer:

regr vldfpelrg

Explanation:

Answer:

i think A is the answer (the water vapor fills less space)

Answer:

This question is incomplete

Explanation:

This question is incomplete but generally it seem to test the knowledge of accuracy. Accuracy is the closeness of a measured value to the specific or actual value of the substance being measured. Hence, the smaller the entire scale that can contain all the substance being measured, the higher the possibility of accuracy to be achieved. For example, a pen of 10.4 cm in length can be better/accurately measured (length) with a 30 cm meter rule than a 1 m  meter rule.

From the question, the 50 mL beaker will provide a "more accurate" measurement of the volume of the bromine than the 100 mL beaker if the 50 mL beaker can contain all the sample of bromine water provided.

Answer:

cell has vast number of constituents in it various scientist proved different theories and discovered different little constituents like mitochondria, DNA etc

15.12 is the number of moles of oxygen in 454.3 g of sodium hydrogen phosphate ([tex]NaH{2}PO_{4}[/tex])

To determine the number of moles of oxygen in 454.3 g of sodium hydrogen phosphate ([tex]NaH{2}PO_{4}[/tex]), we need to use the molar mass and the formula of the compound.

The molar mass of [tex]NaH{2}PO_{4}[/tex] can be calculated by adding up the atomic masses of each element in the formula:

Na: 22.99 g/mol

H: 1.01 g/mol (2 hydrogen atoms)

P: 30.97 g/mol

O: 16.00 g/mol (4 oxygen atoms)

Molar mass of [tex]NaH{2}PO_{4}[/tex] = (22.99 g/mol) + (1.01 g/mol × 2) + 30.97 g/mol + (16.00 g/mol × 4) = 120.00 g/mol

Now, we can use the molar mass to calculate the number of moles of [tex]NaH{2}PO_{4}[/tex]:

Number of moles = Mass of substance / Molar mass

Number of moles of [tex]NaH{2}PO_{4}[/tex] = 454.3 g / 120.00 g/mol ≈ 3.78 moles

Since there are four oxygen atoms in one molecule of [tex]NaH{2}PO_{4}[/tex], we can calculate the number of moles of oxygen by multiplying the number of moles of [tex]NaH{2}PO_{4}[/tex] by the ratio of oxygen atoms to [tex]NaH{2}PO_{4}[/tex] molecules:

Number of moles of oxygen = 3.78 moles × 4 = 15.12 moles

Therefore, there are approximately 15.12 moles of oxygen in 454.3 g of sodium hydrogen phosphate.

Know more about atomic masses here:

https://brainly.com/question/30390726

#SPJ8

The number of molecules of CO2 contained in a 5.00 L tank at 7.53 atm and 485 K can be calculated using the ideal gas law and Avogadro's number. The correct answer is option e, which is 2.45 x 10^24 molecules.

To determine the number of CO2 molecules in the tank, we can use the ideal gas law equation:

PV = nRT

Where:

P = Pressure in atmospheres (7.53 atm)

V = Volume in liters (5.00 L)

n = Number of moles of gas (to be determined)

R = Ideal gas constant (0.0821 L·atm/(mol·K))

T = Temperature in Kelvin (485 K)

Rearranging the equation to solve for n:

n = PV / RT

Substituting the given values:

n = (7.53 atm) * (5.00 L) / (0.0821 L·atm/(mol·K) * 485 K)

n = 0.1848 mol

Now, to convert moles to molecules, we can use Avogadro's number, which states that 1 mole of a substance contains 6.022 x 10^23 molecules.

Number of molecules = (0.1848 mol) * (6.022 x 10^23 molecules/mol)

Number of molecules = 1.112 x 10^23 molecules

Therefore, the correct answer is option e, which is 2.45 x 10^24 molecules.

To learn more about ideal gas law click here: brainly.com/question/30458409

#SPJ11

The given question requires us to calculate the pH of a solution formed by mixing 100.0 mL of 0.100 M NaF and 100.0 mL of 0.060 M HCl. The Ka of HF is given as 7.24 × 10-4. The following is the step-by-step explanation of how to calculate the pH of the given solution.

Mixing 100.0 mL of 0.100 M NaF and 100.0 mL of 0.060 M HCl we get:0.100 M × 100.0 mL = 10.0 mmol NaF0.060 M × 100.0 mL = 6.00 mmol HCl. We need to find the final concentration of NaF and HCl and determine if a buffer is formed or not. Initially, we have: NaF → Na+ + F-HCl → H+ + Cl-Therefore, in the final solution, we have: Na+ + H+ + F- + Cl- → Na+ + Cl- + HF. The final concentration of NaF is given by: Concentration = moles/volume= (10.0 mmol)/(200.0 mL)= 0.050 M. Similarly, the final concentration of HCl can be determined to be 0.030 M.

Consequently, the final concentration of HF is:6.00 mmol – 10.0 mmol = –4.00 mmol The negative value implies that all of the NaF has reacted with the HCl and that there is no NaF left over to react with water. This indicates that there is no buffer formed, and the solution will be acidic. We can write the following equilibrium equation for HF:HF (aq) + H2O (l) ⇌ H3O+ (aq) + F- (aq). The Ka for HF is 7.24 × 10-4.Ka = [H3O+][F-]/[HF]We can assume that [H3O+] ≈ [F-]. Hence, we can write the expression as follows: Ka = [H3O+]2/[HF]= (7.24 × 10-4) = [H3O+]2/(0.050)Therefore,[H3O+] = √(7.24 × 10-4 × 0.050) = 1.08 × 10-3 pH = –log[H3O+]= –log(1.08 × 10-3) = 2.97Hence, the pH of the given solution is 2.97.

To know more about equilibrium equation visit

https://brainly.com/question/32209502

#SPJ11

Answer:

The same chemical properties

Explanation:

Different masses of water at the same temp and pressure will have different volumes and the same empirical formulas and the same chemical properties

At STP, a 50.-gram sample of H2O(l) and a 100.-gram sample of H2O(l) have  the same chemical properties.

The temperature, volume and other physical properties of a sample may vary with the mass of substance present.

However, the chemical properties of a substance do not change irrespective of the amount of substance present. Even the smallest mass of water still retains all the chemical properties of water.

Therefore, at STP, a 50.-gram sample of H2O(l) and a 100.-gram sample of H2O(l) have  the same chemical properties.

Learn more: https://brainly.com/question/6284546

Explanation:      Heat capacity is the amount of heat required to change the temperature of a ... Therefore, specific heat is measured in Joules per g times degree Celsius

true

Explanation:

Newton's first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. ... The third law states that for every action (force) in nature there is an equal and opposite reaction.

Answer:

This is a law because it is based on observations (Newton's Third Law)

Explanation:

4.00 grams of 50 wt% NaOH should be diluted to 1.00 L to make a 0.10 M NaOH solution.

To calculate the amount of 50 wt% NaOH needed to prepare a 0.10 M NaOH solution, we need to know the molar mass of NaOH and the desired volume of the solution. The molar mass of NaOH is approximately 40.00 g/mol.

The given solution is 50 wt% NaOH, which means that 50 grams of NaOH are present in every 100 grams of solution. We need to find out how many grams of NaOH are needed to make 1.00 L of 0.10 M NaOH solution. To calculate the amount of NaOH needed, we can use the formula:

Amount (in moles) = concentration (in M) × volume (in liters)

The desired concentration is 0.10 M and the volume is 1.00 L. Substituting the values into the formula:

Amount (in moles) = 0.10 mol/L × 1.00 L = 0.10 mol

To convert moles to grams, we multiply the amount (in moles) by the molar mass:

Mass = amount (in moles) × molar mass

Mass = 0.10 mol × 40.00 g/mol = 4.00 g

To learn more about molar mass click here:

brainly.com/question/31545539

#SPJ11

Answer: X should represent H, hydrogen.

Explanation:

The H is the only one that hasnt been stated in the left side of the formula. H has three atoms as well.

Dehydration is the process of eliminating water from the given compound. When cyclohexanol dehydrates, it forms cyclohexene as written here:

C₆H₁₁OH ⇒[tex]C_6H_{10} + H_2O\\[/tex]

What is cyclohexanol?

Cyclohexanol is an alcohol formed from the cyclic alkane cyclohexane and water or other hydroxyl groups. The chemical formula of this compound is

C₆H₁₁OH.

To find more on dehydration, refer here:

brainly.com/question/12261974

The pairs of elements that are likely to form an ionic bond are: B. Na and F (Sodium and Fluorine). C. Ca and Cl (Calcium and Chlorine). F. K and I (Potassium and Iodine)

Ionic bonds occur between elements with a large difference in electronegativity. Electronegativity is the tendency of an atom to attract electrons towards itself in a chemical bond.

In options B, C, and F, the pairs of elements have a significant electronegativity difference, which suggests the likelihood of ionic bonding.

In option B, Sodium (Na) has a low electronegativity, while Fluorine (F) has a high electronegativity. The large difference in electronegativity allows Fluorine to attract the electron from Sodium, forming an ionic bond.

In option C, Calcium (Ca) has a low electronegativity, and Chlorine (Cl) has a higher electronegativity. Again, the significant electronegativity difference leads to the formation of an ionic bond.

In option F, Potassium (K) has a low electronegativity, and Iodine (I) has a higher electronegativity, indicating the potential for an ionic bond.

Ionic bonds are characterized by the transfer of electrons from one element to another, resulting in the formation of charged ions that are attracted to each other.

Therefore, the pairs of elements likely to form an ionic bond are B. Na and F, C. Ca and Cl, and F. K and I.

Learn more about electronegativity here: brainly.com/question/3393418

#SPJ11

The comparison between the two groups of pennies reveals distinct differences in their composition, appearance, and weight.

Upon separating the pennies into two groups based on their dates, I observed notable differences between the two groups. Pennies dated before 1982 are primarily composed of copper, while those dated after 1982 are made of zinc with a thin copper plating.

In terms of appearance, the pre-1982 pennies have a reddish-brown color due to their high copper content. They often show signs of aging, such as discoloration, tarnish, and wear. In contrast, the post-1982 pennies have a brighter and shinier appearance, resembling a silver-like hue due to the copper coating.

In terms of size, both groups of pennies have the same diameter and thickness. However, the pre-1982 pennies tend to be slightly heavier due to the higher density of copper compared to zinc, which is used in post-1982 pennies.

Pennies dated before 1982 are made of copper, have a reddish-brown color, and are slightly heavier. Pennies dated after 1982, on the other hand, are made of zinc with a copper coating, appear brighter and more silver-like, and are slightly lighter.

These differences arose from the change in materials used by the U.S. Mint in 1982 to reduce production costs.

For more such question on composition. visit :

https://brainly.com/question/26632540

#SPJ8

Answer:

4

Explanation:

Mass divided by Volume = Density

The objects mass is 200 grams and the volume of the water displaced is 50

So 200 divided by 50 equals 4

Distance =

[tex] \sqrt{ {(6 + 6)}^{2} + {(8 + 8)}^{2} } = \sqrt{144 + 256} = \sqrt{400} = 20[/tex]