what is the lumo of the li₂ molecule? a) 1σ b) 1σ* c) 2σ d) 2σ* e) 1π

Answer:

The volume of the 0.76 M NaCl solution containing 0.35 g of NaCl is approximately 7.89 mL.

Explanation:

To solve this problem, we need to use the relationship between the amount of solute (in moles), concentration (in molarity), and volume (in liters):

amount of solute (in moles) = concentration (in M) x volume (in L)

First, let's calculate the amount of NaCl in moles using the given mass and molarity:

moles of NaCl = mass of NaCl / molar mass of NaCl

moles of NaCl = 0.35 g / 58.44 g/mol (molar mass of NaCl)

moles of NaCl = 0.005992 mol

Next, we can use the above equation to solve for the volume of the solution:

0.005992 mol = 0.76 M x volume (in L)

volume (in L) = 0.005992 mol / 0.76 M

volume (in L) = 0.00789 L or 7.89 mL (rounded to three significant figures)

Therefore, the volume of the 0.76 M NaCl solution containing 0.35 g of NaCl is approximately 7.89 mL.

Answer:

1,3,4

Explanation:

Because you have to know what each one is

In the optimized Lewis structure of PO4 3-, there are zero non-bonding electrons on the central atom.

First, let's look at the Lewis structure of PO4 3-. The central atom is phosphorus (P), which is bonded to four oxygen (O) atoms. Each oxygen atom is bonded to the central phosphorus atom with a single bond, and each oxygen atom also has three pairs of non-bonding electrons.

The Lewis structure of PO4 3- looks like this:

      O
     /
P - O - O
     \
      O

Each single bond in the structure represents two electrons, so there are a total of eight bonding electrons around the central phosphorus atom. Phosphorus has five valence electrons, so there are a total of thirteen valence electrons around the central atom.

To minimize the formula charges, we need to make sure that the central atom has a full octet of eight electrons. Since there are already eight bonding electrons around the central atom, there are no non-bonding electrons on the central atom.

Therefore, the answer to the question is zero non-bonding electrons on the central atom in the optimized Lewis structure of PO4 3- in which the formula charges are minimized.

Learn more about Lewis structure

brainly.com/question/4144781

#SPJ11

Answer:

Iron ore, coke and lime stone are some raw materials used for extracting iron.

Hope it helps! :)

On erosion of Earth's surfaces, the letter of terms and phrase that complete the sentences are:

Cirques are bowl-shaped, amphitheater-like depressions carved by glaciers into high-elevation mountains and valley sidewalls. As gravity pulls the glaciers downslope, they frequently flow up and over the cirque's lip. Once the glaciers recede, lakes (called tarns) frequently form in these depressions.

Cirques are areas of snow accumulation, so the direction in which they point (their aspect) can reveal information about the past links between climate and glacier growth.

Learn more on cirques here: https://brainly.com/question/30224794

#SPJ1

Answer:

Manganese(II) sulfate and hydrogen gas.

Explanation:

Answer:

Mitochondrion

Explanation:

Joe's cells can't convert food energy effectively into energy they can

use. As a result, he gets extremely tired, has weak legs, and can't

breathe well. Joe swims every day to keep his body as strong as

possible. Which organelle is affected by Joes disease

check: quizlet dot com. type in you question

The computation in the question results in the production of 21 g of NF3.

Because it is the reactant that is totally consumed during the reaction, the limiting reactant specifies the maximum amount of product that can be created in a chemical process.

F2 molecular weight is 16.5 g/38 g/mol.

= 0.43 moles

N2 molecular weight is 16.5 g/28 g/mol.

= 0.59 moles

Now;

If 3 moles of F2 and 1 mole of N2 react,

N2 interacts with 0.59 moles at 0.59 * 3/1.

= 1.77 moles of F2

Thus F2 is the limiting reactant

2 moles of NF3 are created from 3 moles of F2.

When using 0.43 moles of F2, you get 0.43 * 2/3.

= 0.29 moles

NF3 mass generated is 0.29 moles * 71 g/mol.

= 21 g

Learn more about limiting reactant:brainly.com/question/14225536

#SPJ1

If 6-25% of the original percent nuclei were left in the sample, then the sample would be about 12,000 years old.

The daughter nuclei in the sample are found at a rate of 1/5730 = 0.0013% per year, or 13% per thousand years.

We do this by using a mass spectrometer. A mass spectrometer can break down any compound into its constituent parts, and then measure each part individually. When we do this for carbon-14, we find that there are 5730 years until half of it decays away—that's when we can add another 6% of it to our sample and expect to have another 5730 years until half of that decays away as well.

So if 6% of the original amount was left in the sample after 5730 years (half life), then there must be 5730 * 0.06 = 1520 daughter nuclei still present (in percent) in the same sample after 5730 years.

To learn more about nuclei visit: https://brainly.com/question/21086171

#SPJ4

#1: A covalent bond

#2 False

#3True

B. Metal is a better conductor then cramic

nice to help you-!

Answer:

b

Explanation: because i took the test and got a 100

Answer:

A good conductor.

Explanation:

Some physical properties of carbon:

   1) Atomic Number: The atomic number of carbons is 6.

   2) Atomic Mass: Its atomic mass is 12.011 g mol-1.

   3) Electronegativity: According to Pauling, the electronegativity of carbon      is 2.5.

   4) Boiling Point: Its boiling point is, 4827o C.

   5) Melting Point: Its melting point is, 3652o C.

A substance composed of two or more elements chemically combined in a definite, fixed proportion by mass is a Compound

A compound is a fabric composed of two or greater components. Water, carbon dioxide and desk salt are a few examples of compounds.

Compound A substance including atoms or ions of two or extra extraordinary factors in precise proportions joined with the aid of chemical bonds into a molecule. The factors can not be separated by means of bodily approach. Water, as an instance, is a compound having  hydrogen atoms and one oxygen atom according to molecule.

Milk isn't compound. A compound is an entity which includes  or greater distinctive atoms associating with chemical bonds. Milk is an emulsion or colloid of fats globules within a water-primarily based fluid that consists of dissolved carbohydrates and protein aggregates with minerals.

A compound contains atoms of various elements chemically blended together in a fixed ratio. An detail is a pure chemical substance made of same type of atom. Composition. Compounds include one-of-a-kind factors in a fixed ratio arranged in a described manner via chemical bonds.

Compounds shape as a result of chemical reactions. The factors in compounds are held together with the aid of chemical bonds. A chemical bond is a pressure of appeal among atoms or ions that proportion or switch valence electrons. Water is an instance of a commonplace chemical compound.

Learn m ore about Compound here:-https://brainly.com/question/24924853

#SPJ4

Answer:

true.

Explanation:

brain thingy haha cute

The formation of a precipitate is possible when the product of the ionic concentrations exceeds the Ksp value. Qis is the reaction quotient, which is the ionic product (IP) in a solution.

To determine whether a precipitate will occur, the reaction quotient (Qis) must be compared to the solubility product constant (Kip). The correct option is (d) Precipitation will not occur because Qis < Kip. The calculations are provided solution below; Qis = [Pb2+] [I–]2Moles of NaI = 0.587 L × 0.00531 mol/L = 0.00313 mol Moles of Pb(NO3)2 = 0.840 L × 0.00536 mol/L = 0.00451 mol[Pb2+] = 0.00451 mol / (0.587 L + 0.840 L) = 0.00327 M[I–] = 0.00313 mol / (0.587 L + 0.840 L) = 0.00226 MQsp = (0.00327 M) × (0.00226 M)2 = 1.72 × 10–8 Kip = 1.4 × 10–8As Qsp is less than Ksp, a precipitate will not form. Therefore, the correct option is (d) Precipitation will not occur because Qis < Ksp.

learn more about solution here.

https://brainly.com/question/1616939

#SPJ11

Answer:

4m/s² north.

Explanation:

Data obtained from the question include the following:

Mass (m) = 10Kg

Force (F) = 40N North.

Acceleration (a) =...?

Force is simply the product of mass and acceleration. It is represented mathematically as:

Force (F) = Mass (m) x acceleration (a)

F = ma

With the above formula, we can obtain the acceleration of the object as follow:

40 = 10 x a

Divide both side by 10

a = 40/10

a = 4m/s²

Since the force was applied in the north direction, the object will also accelerate in the north direction. Therefore, the acceleration of the object is 4m/s² north.

The major disadvantage is - Ozone decomposes quickly and does not provide long-term protection against possible contamination as the water is piped through a municipal distribution system.

The gas ozone (O3) is unstable. As a result, it breaks down quickly, oxidizing any organic impurities present in the water including bacteria, viruses, and germs, but because it is a gas, it leaves the water after the oxidation is complete. Therefore, when the ozone started to disintegrate at first, the water may have various additional contaminants that mix with it as it travels through the municipal distribution system. Water carries through the new pollutants from the pipes. Ozone therefore has no long-term effect.

Chlorination produces trihalomethane, not ozonation, hence the expansiveness of ozone is dependent on the impurity of the water. Trihalomethane is produced by chlorination, not ozonation. Although ozone as a gas has a faint odor, when it is combined with water, it oxidizes the pollutant and breaks down, leaving no ozone in the water. Therefore, water does not smell like ozone.

Learn more about ozonation:

brainly.com/question/27911475

#SPJ4

To obtain a more reliable or precise value for the optimum temperature in an experiment, several changes can be made. Here are some suggestions: Replicate the experiment, Increase sample size, Use a narrower temperature range, Utilize more precise temperature control etc

For more such questions on  optimum temperature  visit:

https://brainly.com/question/4735135

#SPJ8

Ni²⁺ is the only ion on the list that can exist as both a high-spin and a low-spin octahedral complex. The correct option is B.

An electrostatic model called the crystal field theory (CFT) assumes that the metal-ligand connection is ionic and results only from electrostatic interactions between the metal ion and the ligand. When dealing with anions, ligands are viewed as point charges, and when dealing with neutral molecules, as dipoles.

The crystal field splitting theory predicts that some transition metal ions can exist as either high-spin or low-spin octahedral complexes, depending on the magnitude of the crystal field splitting parameter (Δ) relative to the pairing energy (P).

Of the ions listed, the only one that could exist as either a high-spin or a low-spin octahedral complex is Ni²⁺ (B).

Mn²⁺ (A) is a d⁵ ion and will always form a high-spin octahedral complex due to its large number of unpaired electrons.

Sc³⁺ (C) is a d⁰ ion and does not form octahedral complexes with ligands.

Cu²⁺ (D) is a d⁹ ion and typically forms a low-spin octahedral complex due to the stability of the half-filled d⁹ configuration.

Zn²⁺ (E) is a d¹⁰ ion and does not have any unpaired electrons to undergo spin pairing, so it will always form a low-spin octahedral complex.

Therefore, the correct answer is B) Ni²⁺.

To know more about crystal field theory here

brainly.com/question/23840749

#SPJ4

Answer:

C. trigonal Planar

Explanation:

Tetrahedral is 4 connected

Bent is 2 connected with a lone pair

Linear is 2 connected in a line

Trigonal Planar is the one with 3 connected.

Answer:

C: Trigonal Planar

Explanation:

Tetrahedral is four connected

Bent is 2 linked with a lone pair

Linear is two connected in a line

Trigonal Planar is the one with 3 connected.

Answer:

c

Explanation:

The percent yield or percent recovery after recrystallization of the sample is 46.67%

Percent yield is defined as the ratio of actual yield to the theoretical yield multiplied by 100. If the actual and theoretical yield are same then the percent yield is 100%.If actual yield is less than the theoretical yield then the percent yield is less than 100%.Reason of this condition arising is the incompletion of reaction or loss of sample during recovery process.

In cases where percent yield is over 100% it indicates that more sample is recovered than the predicted amount.This condition arises when there are other simultaneous reactions taking place leading to the formation of product. It can also arise if there is incomplete removal of impurities from the sample .

In the given example,percent yield or percent recovery is calculated as,

percent yield=recovered yield/recrystallized yield×100

=0.98/2.1×100=46.67%

Hence, the percent  yield or recovery is 46.67%.

Learn more about percent yield,here:

https://brainly.com/question/2506978

#SPJ2

The temperature of gas with all the given conditions comes out to be 1002.94 °C.

Given to us is

P = 5.2672 atm

V = 15.732 L

n = 4.3054 mol

R = 0.0821 L·atm/(mol·K)

To calculate the temperature of the gas, we can use the ideal gas law equation:

PV = nRT

Where:

P = pressure of the gas

V = volume of the container

n = number of moles of gas

R = ideal gas constant

T = temperature of the gas

First, let's rearrange the equation to solve for T:

T = (PV) / (nR)

Now, we can substitute the values into the equation and calculate T:

T = (5.2672 atm × 15.732 L) / (4.3054 mol × 0.0821 L·atm/(mol·K))

T = 1276.0909 K

To convert the temperature to degrees Celsius, we subtract 273.15:

T = 1276.0909 K - 273.15

T = 1002.94 °C

Therefore, the temperature of the gas is approximately 1002.94 °C.

Learn more about the ideal gas equation here:

https://brainly.com/question/15379358

#SPJ 4

The sigma bond between aluminum (Al) and chlorine (Cl) in aluminum chloride (AlCl3) is formed by the overlap of the 3p orbital of chlorine and the 3s orbital of aluminum.

In the formation of a sigma bond, atomic orbitals of the bonding atoms overlap to create a region of electron density between them. In the case of AlCl3, aluminum has an electronic configuration of [Ne] 3s2 3p1, while chlorine has an electronic configuration of [Ne] 3s2 3p5.

To form a sigma bond, the 3p orbital of chlorine and the 3s orbital of aluminum overlap. Both orbitals are spherical in shape, and their overlapping results in a region of electron density along the internuclear axis, creating a sigma bond.

In aluminum chloride (AlCl3), the sigma bond between aluminum and chlorine is formed by the overlap of the 3p orbital of chlorine and the 3s orbital of aluminum. This overlap allows for the sharing of electrons between the atoms, creating a strong and stable bond. The formation of sigma bonds is crucial in the construction of chemical compounds and plays a significant role in determining their properties.

To know more about sigma bond, visit;
https://brainly.com/question/31659836
#SPJ11

In a 2.50-L container with 56 g each of nitrogen and carbon dioxide gases added at 25°C, the partial pressure of nitrogen gas is 4.89 atm. The root mean square speed of an A₂ molecule at 0°C is approximately 8.65 m/s. None of the given options are correct.

Q1. We need to find the partial pressure (atm) of nitrogen gas in a 2.50−L container into which 56 g of each nitrogen and carbon dioxide gases are added at 25°C. Let's begin:
56g of N₂ will be equal to moles of N₂ = (56/28) = 2 mol N₂
56g of CO₂ will be equal to moles of CO₂ = (56/44) = 1.27 mol CO₂

Total moles of gas = 2 + 1.27 = 3.27 moles
Molar mass of N₂ = 28 g/mol
Ideal Gas equation = PV = nRT
Partial pressure of N₂ = P_N₂ = (n_N₂ * RT) / V
Where,
n_N₂ = number of moles of N₂ = 2 mol
R = gas constant = 0.08206 L atm K⁻¹ mol⁻¹
T = temperature in kelvin = (25 + 273.15) K = 298.15 K
V = volume of container = 2.50 L

Substituting the values in the formula, we get:
P_N₂ = (2 mol * 0.08206 L atm K⁻¹ mol⁻¹ * 298.15 K) / 2.50 L
P_N₂ = 4.89 atm

Therefore, the partial pressure (atm) of nitrogen gas in a 2.50−L container into which 56 g of each nitrogen and carbon dioxide gases are added at 25°C is 4.89 atm.

None of the given options are correct.

Q2. We need to find the root mean square speed (m/s) of an A₂ molecule (atomic mass =6amu ) at 0°C. Let's begin:

The root mean square speed (v rms) of an ideal gas is given by the formula:
v rms = √(3RT / M)
Where,
R = gas constant = 8.314 J/mol K
T = temperature in kelvin = 0 + 273.15 K = 273.15 K
M = molar mass of the gas = 6 g/mol = 6 / 1000 kg/mol = 0.006 kg/mol

Substituting the values in the formula, we get:
v rms = √(3 * 8.314 J/mol K * 273.15 K / 0.006 kg/mol)
v rms = √(3 * 8.314 J/mol K * 273.15 K / 6 * 10⁻³ kg/mol)
v rms = √(74.81)
v rms = 8.65 m/s (approx.)

Therefore, the root mean square speed (m/s) of an A₂ molecule (atomic mass =6amu ) at 0°C is 8.65 m/s (approx.).

None of the given options are correct.

To know more about root mean square speed, refer to the link below:

https://brainly.com/question/30759623#

#SPJ11

Complete Question:

Q24: What is the partial pressure (atm) of nitrogen gas in a 2.50-L container into which 56 g of each nitrogen and carbon dioxide gases are added at 25°C ? A) 39.00 B) 39.10 C) 17.90 D) 19.55 B) 15200

Q25: Calculate the root mean square speed (m/s) of an A2 molecule (atomic mass =6amu) at 0°C. 4) 1506 B) 1.135×10⁶ C) 1065.0 D) 1065.3 E) 753

When you use a soap or detergent to wash, the surfactant molecules will interact with the dirt and oils to help wash them away. During this interaction, something called a micelle is formed.

A micelle is a cluster of surfactant molecules that are formed when soap or detergent molecules are mixed with water. When soap or detergent is added to water, the hydrophobic tails of the molecules (which do not mix with water) cluster together, while the hydrophilic heads (which are attracted to water) point outwards towards the water.

Micelles are formed by the hydrophobic tails of the surfactant molecules clustering together in the center, with the hydrophilic heads facing outward.

The soap or detergent's molecules' hydrophobic tails attract oils and dirt, while the hydrophilic heads attract water molecules. The hydrophobic tails of the detergent molecules encircle the dirt and oil particles, while the hydrophilic heads point outward toward the water, creating a micelle.

The micelles disperse the dirt and oil particles throughout the water so that they can be washed away.

To learn more about detergent, refer below:

https://brainly.com/question/241514

#SPJ11

gene is the correct answer.