an ionic bond is a force of _____between anions and ______when combined make _____compounds that are electrically_____

Phosphatidylserine is a type of phospholipid that is mainly found in cell membranes. Its structure is made up of two fatty acid chains, a phosphate group, a serine molecule, and a glycerol molecule.

The fatty acid chains are hydrophobic, meaning they repel water, while the phosphate group and serine molecule are hydrophilic, meaning they attract water.

The glycerol molecule acts as a bridge that connects the two fatty acid chains to the phosphate group and serine molecule.
The structure of phosphatidylserine is important for its function in the cell membrane.

Because of the hydrophobic and hydrophilic components of its structure, phosphatidylserine is able to form a lipid bilayer, which is a barrier that separates the inside of the cell from the outside environment.

The hydrophilic heads of the phosphatidylserine molecules face outward and interact with water, while the hydrophobic tails face inward and repel water.
Phosphatidylserine also plays a role in cell signaling and apoptosis, which is programmed cell death.

It acts as a signaling molecule by binding to proteins that are involved in cellular pathways.

In addition, phosphatidylserine is translocated to the outer leaflet of the cell membrane during apoptosis, which signals to immune cells that the cell is ready to be removed.
In conclusion, the structure of phosphatidylserine is made up of two fatty acid chains, a phosphate group, a serine molecule, and a glycerol molecule. Its hydrophobic and hydrophilic components allow it to form a lipid bilayer in cell membranes, and it also plays a role in cell signaling and apoptosis.

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Answer:

See explanation

Explanation:

Mass of impure compound A = 117 mg

Mass of impure compound B = 89 mg

Mass of pure compound A = 93 mg

Mass of pure compound B = 83 mg

Percentage recovery of pure compound A = 93 mg/117 mg * 100 = 79.5 %

Percentage recovery of pure compound B = 83mg/89 mg * 100/1 = 93.3 %

Answer: Less

Explanation:

Ethane is a non-polar molecule while water is a polar molecule

In the bicycle assembling process, the limiting reactant is seats since they will be used up first.

A limiting reactant is a reactant which is used up first in a reaction and on which product formation depends on.

In a given reaction, once the limiting reactant is used up, the reaction will stop.

For a bicycle to be assembled, 1 frame, 1 seat, 1 seat of handlebars, 1 seat of pedals and 2 tires are required.

In the process of assembling bicycles, there are 114 frames, 300 tires, 75 seats, 109 sets of pedals, and 84 sets of handlebars.

Therefore, the limiting reactant is seats since they will be used up first.

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Answer:

hii

Explanation:

Answer:

First of all list the given before starting to solve

GIVEN:

C= 66.7%

H=11.1%

O= 100-66.7-11.1= 22.2%

In any empirical formula problem you must first find

look u should memories the steps all to find it but if ur given the percentage already so no need to find the mass bcz in the first place we find the mass just to find the percentage.

now change the percentage we have in each element to 100grams now u would ask why 100g and not 1g well , we chose 100 bcz it's percentage and easier to calculate.

after converting all to grams

follow another formula

\(n = \frac{mass}{molar \: mass} \)

n represents number of moles

so apply to each , but for the molar mass u either should be given

H= 1 g/mol

C=12g/mol

O=16g/mol

apply it for each

HOPE U UNDERSTOOD IT

By focusing on certain fields, precision management can assist farmers in using less fertiliser. Option D is the right choice as a result.

In 1994, Precision Management was founded with the express purpose of offering customers comprehensive, effective, and personalised property management services while concentrating on and achieving their goals and objectives. Precision has developed friendships as well as commercial ties during the past 25 years. Our clients value Precision's distinctive, hands-on management approach and the company's overall commitment to their assets. By focusing on certain fields, precision management can assist farmers in using less fertiliser.

Therefore, the correct option is option D.

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16

Hydrocarbons are compounds that only consist of hydrogens and carbons.

Saturation

For a hydrocarbon to be saturated, it must have the maximum amount of possible hydrogens. This means that a hydrocarbon will only have single bonds. The hydrocarbon described in the question (known as heptane) is saturated. To find the number of hydrogens in a saturated hydrocarbon we can use the formula 2x+2, where x is the number of carbons.

Thus, the hydrocarbon has 16 hydrogens.

Lewis Structure

The formula above is based on the Lewis structure of hydrocarbons. The Lewis structure of a compound is a visual representation of the elements and bonds within the compound. Another way to find the number of hydrogens is by drawing the complete Lewis structure and then counting the hydrogens. Attached below is the Lewis structure of heptane.

Answer:

n = 0.651 mol

Explanation:

Given data:

Volume of CO₂ = 14.6 L

Temperature = standard = 273.15 K

Pressure = standard = 1 atm

Number of moles of CO₂ = ?

Solution:

The given problem will be solve by using general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

by putting values,

1 atm × 14.6 L = n × 0.0821 atm.L/ mol.K   × 273.15 K

14.6 L. atm =  n × 22.43atm.L/ mol

n = 0.651 mol

The balanced equation of the redox reaction is given as follows:

The balanced equation of the reaction is determined using the half-reaction method.

The given equation of the redox reaction is:

H₆TeO₆ + Br₂ ----> TeO₂ + BrO₃⁻

Reduction half-reaction:

H₆TeO₆ → TeO₂

The oxidation state of Te changes from +6 to +4, showing that it has lost gained electrons.

H₆TeO₆ → TeO₂ + 2e⁻

Oxidation half-reaction:

Br₂ → BrO₃⁻

The oxidation state of Br changes from 0 to +5, showing that it has lost five electrons.

Balancing the electrons transferred and the atoms by adding electrons, H₂O, and H⁺ to the appropriate sides:

Br₂ + 6 H₂O → 2 BrO₃⁻ + 12 H⁺ + 10 e⁻

The number of electrons transferred in both half-reactions balanced is  by multiplying the oxidation half-reaction by 5 and the reduction half-reaction by 2:

5 (H₆TeO₆ → TeO₂ + 2 e⁻) → 5 H₆TeO₆ → 5 TeO₂ + 10 e⁻

2 * (Br₂ + 6H₂O → 2 BrO₃⁻ + 12 H⁺ + 10e⁻) → 2 Br₂ + 12 H₂O → 4 BrO₃⁻ + 24 H⁺ + 20 e⁻

The two half-reactions are added together and the electrons are canceled out to obtain the balanced redox reaction:

5 H₆TeO₆ + 2 Br₂ + 12 H₂O → 5 TeO₂ + 4 BrO₃⁻ + 24 H⁺

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Based on the law of conservation of momentum, the design of the egg cushion will have to ensure that the momentum of the egg is distributed across the material in order to avoid cracking.

Momentum of a body is the product of its mass and velocity.

The principle of conservation of momentum states that in an isolated system of colliding bodies, the total momentum is conserved.

Based on the principle above, the design of the egg cushion will be such that the momentum of dropping the egg will be distributed across the material in order to avoid cracking.

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The partial charges on each fluorine atom are negative. Option B) The central O atom is the correct answer. Option B

The partial charges in a molecule are determined by the electronegativity values of the atoms involved. Electronegativity is the ability of an atom to attract electrons towards itself in a chemical bond. In the case of \(F_2O\), fluorine (F) is more electronegative than oxygen.

Fluorine is the most electronegative element on the periodic table, meaning it has a high ability to attract electrons. Oxygen is also relatively electronegative but less so than fluorine. When fluorine atoms bond with oxygen, the shared electrons will be pulled more towards the fluorine atoms, creating a polar covalent bond.

In \(F_2O\), each fluorine atom will pull the shared electrons towards itself, resulting in a higher electron density around the fluorine atoms. This creates a region of partial negative charge around the fluorine atoms.

Conversely, the oxygen atom will have a region of lower electron density and, therefore, a partial positive charge. This is because the shared electrons spend more time around the fluorine atoms due to their higher electronegativity.

Option B

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The concentration of the solution is 0.3 mol/L.

We know that concentration is the amount of substances that is present. We know that the concentration can be measured by the use of several units and one of the units that we can be able to use is the  mol/L.

We have that the concentration in w/w is 5.0% and this means that the mass of water in the solution is 5g. From the density of the solution;

volume = mass/density

= 5g/  1.000 g/mL

= 5 mL or 0.005 L

Number of moles of sugar = 5g/342.30 g/mol

= 0.015 moles

Concentration = Number of moles/volume

=  0.015 moles/0.005 L

= 0.3 mol/L

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Answer:

B.  Keq = 6.0 x 10-2.

Explanation:

Hello there!

In this case, according to the given information, it turns out possible for us to remember that any equilibrium constant is computed by dividing the concentration of products by that of reactants:

\(Keq=\frac{[Prod]}{[Reac]}\)

Thus, a reaction that is reactant-favored will have a Keq>1 because the concentration of reactants prevail over that of products at equilibrium, and thus, the correct answer is B.  Keq = 6.0 x 10-2.

Regards!

Answer:

A is 90g. B is 34.7g

Explanation:



The mass percent of each element is:

mass percent of C is 24%

mass percent of H is 4%

mass percent of Cl is 50%

mass percent of N is 9.8%

Mass percent of oxygen is 12.2%

The mass of each of the constituent elements in a sample of the compound is determined as follows:

mass of C:

1 mole of C is present in 1 mole of CO₂

The mass of C in 0.138 g of CO₂ will be:

0.138 g / 44 g * 12 g = 0.0368 g

mass of H:

2 moles of H are present in 1 mole of H₂O

The mass of H present in 0.0566 g H₂O will be:

0.0566 g / 18 * 2 * 1 = 0.00628 g

mass of Cl;

1 mole of Cl is present in 1 mole of AgCl

The mass of Cl in 0.251 g of AgCl will be:

0.251 g / 143.5 g * 35.5 g = 0.0621 g

mass of N:

1 mole of N is present in 1 mole of NH₃

The mass of N in 0.251 g of NH₃ will be:

0.0238g / 17.0 g * 14 g = 0.0196 g

Mass percent of each element will be:

mass percent of C:

mass percent = 0.0368/0.15 * 100

mass percent = 24%

mass percent of H:

mass percent = 0.00628 / 0.15 * 100%

mass percent = 4%

mass percent of Cl;

mass percent of Cl:

mass percent = 0.0621 / 0.125 * 100%

mass percent = 50%

mass percent of N:

mass percent = 0.0196 / 0.2 * 100%

mass percent = 9.8%

Mass percent of oxygen = 100 - (24 + 4 + 50 + 9.8)

Mass percent of oxygen = 12.2%

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Answer:

Following are the solution to this question:

Explanation:

Evaporate involves pushing to liquid from either a liquid phase. It's used passively, like in the overnight loss of moisture, and aggressively, as in the substrate loss of moisture by the light. The vaporized water is coming from the sea, but only 77% of the precipitation occurs and over the ocean as well as the remaining rain falls over land. Groundwater and rainwater are the primary sources of water.

The data shown in the Sample of Elements table can be arranged on basis of physical and chemical properties , atomic number , atomic weight , etc .

The data shown in the Sample of Elements table can be arranged in various ways :

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From the outcome of the experiment, we could infer that the salt inhibited the growth of the grass.

The following were observed from the experiment:

Thus, we can conclude that:

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The complete question goes thus:

Observation: I want to know what effect salt has on the growth of grass. So I measure out 3 equal-sized squares of grass out the back of the Green Building. The first square of lawn I water with 5 liters of pure water from a watering can every day. The second square of lawn I water with 5 liters of pure water with 2 grams of salt mixed in, every day. The third square of lawn I water with 5 liters of pure water with 4 grams of salt mixed in, every day. I measure the height of the grass after 14 days and note the following observations. The first square is green and 15 cm high. The second square is greeny-yellow and 6 cm high. The third square is yellowy-brown and looks dead and is only 2cm high. What could we infer about the effect salt has on the growth of grass?

Answer:

CH3NH3Pbl3

Explanation:

is an example of a perovskite th that would be used in a perovskite solar cell

Holide Perovskite

Avogadro's number is used to determine the small entity like the atoms and the molecules. 5.5 moles of magnesium hydroxide contain 3.31 × 10²⁴ molecules.

Molecules are the small entity that makes up the compound. It is made up of similar or different atoms.

If 1 mole of magnesium hydroxide = 6.02 ×10²³ molecules

Then 5.5 moles = 33.11 × 10²³ molecules.

Therefore, 3.31 × 10²⁴ molecules of magnesium hydroxide are present in 5.5 moles.

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The reaction order with respect to compound A is 2. Solution: 2.

Let us compare reaction rates at [A] = 4.0 M and [A] = 8.0 M:

0.000043 M/s at [A] = 4.0 M

0.00017 M/s at [A] = 8.0 M

To determine the order of the reaction with respect to A, we can use the following equation:

rate = k(A)x(B)y

where k is the rate constant

x = order in relation to A

y = position in relation to B

We can simplify the equation by assuming that the order with respect to B is zero (i.e., B has no effect on the rate of the reaction).

k[A]x = rate

Taking the ratio of the two rates we calculated earlier, we get:

(0.00017 M/s) / (0.000043) = (k[8.0]x) / (k[4.0]x)

When we simplify, we get:

4 = (8^x) / (4^x)

When we take the logarithm of both sides, we get:

x log(4) = log(4) (2)

2 x = log(4) / log(2)

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Answer

C. The increased kinetic energy causes the particles to move faster, causing more collisions.

Explanation

An increased temperature typically causes a reaction to occur faster by raising the average kinetic energy of the reactant molecules.

Therefore, a greater proportion of molecules will have the minimum energy necessary for an effective collision.

The correct answer is option C. The increased kinetic energy causes the particles to move faster, causing more collisions.

Answer:

the characteristics of primary standard substances are:

1.High purity.

2.Stability (low reactivity)

3.Low hygroscopicity

4.High equivalent weight

5.Non-toxicity.

Ready and cheap availability.

Answer:

Example 1

palladium(II) nitrate,

Example 2

Metal catalysts such as Fe, Ni, Mo, and Co are routinely used in the manufacture of CNMs.

Explanation

The three metals used in catalytic converters — rhodium, platinum and palladium — are part of a category known as platinum group metals, or PGMs, which are known for their catalytic properties.

Answer: 6.23

Explanation:

1) solve for pH  

pH=-log (H3O+) = - log 1.7 X 10^-8 =7.77

2) now do 14-pH  = 14 -7.77=6.23

Given that the nitric acid solution contains 70% nitric acid, this means that for every 100g of the solution, there are 70g of nitric acid. Hence, the remaining 30g is water.Since the question requires the molarity of the solution, we need to first calculate the number of moles of nitric acid in the solution.

Number of moles of nitric acid = Mass of nitric acid / Molar mass of nitric acid Molar mass of nitric acid, HNO3 = 1(atomic mass of hydrogen) + 14(atomic mass of nitrogen) + 3(atomic mass of oxygen) = 63 g/mol For the given solution,Mass of nitric acid = 70g Number of moles of nitric acid = 70/63 = 1.1111 mol Now, we need to calculate the volume of the solution containing 1.1111 mol of nitric acid.

Assuming the density of the solution to be 1 g/mL, the volume of the solution containing 1.1111 mol of nitric acid is given by,Volume of solution = 1.1111 mol / 1 g/mL = 1.1111 L Thus, the molarity of the nitric acid solution is: Molarity, M = Number of moles / Volume of solution M(HNO3) = 1.1111 mol / 1.1111 L = 1 M Ans: M(HNO3) = 1 M

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