A seed-bearing plant starts its growth from?

A: An egg cell
B: A Sperm Cell
C: The Joining Of Egg And Sperm Cells

The percentage of the excess stereoisomer in the mixture c.25%.

Stereoisomerism, or spatial isomerism, is a form of isomerism wherein molecules have the same molecular components and series of bonded atoms, but fluctuate in the three-dimensional orientations of their atoms in space.

The observed rotation of the mixture is levorotary (terrible, counter-clockwise), and the precise rotation of the pure S enantiomer is given as dextrorotary (fantastic, clockwise), which means that the pure R enantiomer should be levorotary, and the mixture has to comprise extra of the R enantiomer than of the S enantiomer.

Enantiomers have the same chemical and bodily homes and are indistinguishable from every other except for the route of rotation of the plane of polarized mild. they're described as optically lively.

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Disclaimer:- your question is incomplete, please see below for the complete question.

the specific rotation of a pure substance is 10 degrees. a mixture of this substance and its enantiomer has an observed specific rotation of 2 degrees. what is the percentage of the excess stereoisomer in the mixture

a.50% b.75% c.25% d.0% e.80%

Explanation:

ok so I believe:

a. increase in atomic radii going down a group and decrease going across a period.

b. increase in IE1 going across a period and up a group. the highest IE1 elements are like He, Ne, F and first ionization energy decreases moving further away from those elements moving south west on the periodic table.

c. electron affinity increases moving across a period left to right.

d. ionic radii increases going down a group and decreases going across a period left to right

e. electronegativity increases across a period but decreases down a group. (opposite for electropositivity)

what is meant by the d-block elements? are you referring to the spdf location?

0.175M is found to be the concentration of the solution from the given titration reaction.

The idea of concentration is one that is frequently utilized in chemistry and related domains. It is a measurement of how much of one substance is diluted with another.

A chemical species' concentration in a solution, specifically the quantity of a solute per unit volume of solution, is measured by its molar concentration.

Given:

Weight = 0.458g

Volume = 12.84mL

Molecular weight = 204.22g/mol

To find:

Concentration = ?

Formula:

Concentration = no. of moles / volume

Calculations:

No. of moles = weight given / molecular weight

No. of moles = 0.458 / 204.22g/mol

No. of moles = 2.242 x [tex]10^{-3}[/tex] mol

Concentration = 2.242 x [tex]10^{-3}[/tex] / 12.84mL

Concentration = 0.175M

Result:

The concentration of the given solution is found to be 0.175M

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Refer to attachment <⁠(⁠￣⁠︶⁠￣⁠)⁠↗

The total time taken by half of the oxygen to effuse through the membrane is 68.18 hours.

The rate of effusion can be calculated by :

r = V/t

r = 1.5 L/24hr

r = 0.0626 L/hr

According to Graham's Law, effusion is inversely proportional to the square root of their molar mass.

[tex]\frac{r1}{r2}[/tex]  = √[tex]\frac{M2}{M1}[/tex]

The molar mass of He is 4 g/mol  and molar mass of O is 32 g/ mol.

Putting the values

0.0626 L/hr ÷ [tex]r_{2}[/tex] = √32/4

[tex]r_{2}[/tex] = 0.022 L/hr

Therefore, the time taken for effusion of half of 3 L that is 1.5 L of oxygen is:

Time = 1.5 L/ 0.022L/hr = 68.18 hours

Hence, the total time taken by half of the oxygen to effuse through the membrane is 68.18 hours.

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The  picture shows the electronic configuration of Carbon which belongs to 14 group and 2nd period in the periodic table.

A gas is said to be inert if it does not readily react chemically with other substances and does not afterwards produce chemical compounds. The noble gases, also known as the inert gases in the past, frequently do not react with numerous things.

In the figure there are 2 e in k shell 8  e in l shell and 2 e in last one. So  total becomes 12 e. The  Carbon contains 12 electron in shells , valence electrons are 2 electrons , group is 14 , period is 2 and family is Carbon family.

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The atomic weight of one carbon atom = 12 amu

Mass of 1 mole of carbon atoms = 1 × atomic weight of one carbon

= 12 gm

Since we already know that the atomic mass is specified for one mole of the atom, we may get the mass of one atom by dividing the mass by Avogadro's number.

The mass of one atom of carbon is = Atomic mass/Avogadro number

= 12g/6.022×10^23

= 126.022×10^−23g

= 1.9933×10^−23g

Hence, the mass of 1 carbon atom is 1.9933×10^−23grams

Now,

Mass of 8.99 x 10^24 atoms = (8.99 x 10^24) x (mass of 1 carbon atom)

⇒ Mass of 8.99 x 10^24 atoms = 8.99 x 10^24 x 1.9933×10^−23grams

⇒ Mass of 8.99 x 10^24 atoms = 17.919767 x 10

⇒ Mass of 8.99 x 10^24 atoms = 179.2 g (approx.)

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The mass percent of bromine in this tellurium and bromine compound is 71.47%.

If the compound is made up only of tellurium and bromine, then if the mass percent of tellurium is 28.53%, we can safely assume that the rest is bromine. So, we take the 100% and subtract the mass percent of tellurium to calculate the mass percent of bromine:

100% - 28.53% = 71.47%

The mass percentage of bromine in this compound is 71.47%.

We can even use this data and the molar masses of tellurium and bromine to calculate the empirical formula of the compound if needed.

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Answer:

A neutralization reaction is when an acid and a base react to form water and a salt and involves the combination of H+ ions and OH- ions to generate water

Make Me As Brainliest

Answer:

it's b

hydrogen ions and hydroxide ions...

hope it helps you

The specimen at 100x zoom can be identified as an Animal cell as per the observations of it containing the cytoplasmic elements like the cytosol.

Organelles, cytoplasmic elements, the cytosol, and the cell membrane make up the normal structure of an animal cell.

Each of the cell's organelles is a membrane-bound structure with a specific function. Animal cells are the kind of typical eukaryotic cells because they have the presence of a membrane-bound nucleus and organelles and are encased in a plasma membrane.

Animal cells lack a cell wall, in contrast to eukaryotic cells found in plants and fungus. The building blocks of all living things in the kingdom Animalia are called animal cells.

They give bodies shape, take in nutrients to turn into energy, and aid in animal movement. They are also capable of self-replication and contain all an organism's genetic material.

The biggest organelle in animal cells is the nucleus. Cell activity is controlled by the nucleus. It also includes the chromosomes of the cell.

The genetic material (DNA) that makes you who you are is contained in the chromosomes.

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Answer:

Soap

Explanation:

The density of water decreases as it becomes warmer, more space. When comparing two samples same salinity of water, sample with the higher temperature will have more volume and hence be less dense.

The accumulation of salt from rainfall over a long period of time or the weathering of rocks are two examples of natural processes that contribute to primary salinity.

By running an electric current between a salinity meter's two electrodes in a sample of soil or water, it is possible to determine the salinity of both water and soil. The quantity and make-up of dissolved salts affect the electrical conductivity, or EC, of a soil or water sample.

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Perfect gas is a hypothetical gas in which the volume of the individual atoms (molecules) is negligible compared to the total volume of the container is true.

For a gas to be ideal, it has to follow the following rules.

The volume of molecules of a Perfect gas also known as an ideal gas has to be almost negligible as compared to the volume of the container.

The molecules do not attract or repel each other. They hardly collide with other in an elastic collision. This elastic collision also happens with the wall of the container.

So according to the first rule, the volume of individual molecules is negligible as compared to the the total volume of the container.

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The mechanism of formation of Nitrosyl bromide from [tex]Br_2[/tex] and NO in a chemical reaction is depicted by the given elementary steps.

The outcome of a reaction combining nitrogen monoxide and [tex]Br_2[/tex] as our starting materials will be nitrosyl bromide; the final mixture will have a combination of all three chemicals.

Nitrosyl bromide is a red gas that condenses slightly below room temperature. The reversible reaction of nitric oxide with bromine can produce nitrosyl bromide.

Overall reaction can be obtained by adding the given two elementary steps:

[tex]Br_2 + NO \rightarrow Br_2NO\\Br_2NO + NO \rightarrow 2BrNO[/tex]

On addition of the above two reactions,

[tex]Br_2 + Br_2NO + 2NO \rightarrow Br_2NO + 2BrNO[/tex]

The overall reaction obtained is:

[tex]Br_2 + 2NO \rightarrow 2BrNO[/tex]

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The correct option is A.

The percentage error in the measurement of the density is about 12%.

The error in any measurement is the difference between the actual measurement of the substance and the estimated measurement of the substance.

The percentage error is obtained by dividing the error in the measurement by actual measurement and multiply the result by 100%.

The average density measurement = 6.5 g/mL

error = actual measurement - estimated measurement

error = 7.4 g/mL - 6.5 g/mL

error = 0.9 g/mL

percentage error = (0.9 / 7.4) x 100%

percentage error = 12.16 %

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If the volume of a sample of gas is doubled while holding the temperature of the gas constant, then the pressure of the gas is half the initial pressure.

The relationship between the volume and pressure of a gas is given by Boyle's law of gases.

The equation of Boyle's law of gases is given as follows:

P₁V₁ = P₂V₂

Where;

Solving for the final pressure of the gas;

V₂ = 2 V₁

P₂ = P₁ * V₁ / 2 V₁

P₂ = P₁ / 2

Hence, the final pressure is half the initial pressure.

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Because there are free electrons present, solid copper conducts electricity. CuCl2(g) does not conduct electricity because it contains no free electrons.

Because free electrons are drawn to metal cations by electrostatic forces in the metallic connection, metals are referred to as conductors of electricity. The conductivity of solid metals is accounted for by these free electrons.

The word "conductivity" is used to describe a number of physical phenomena. In terms of heat, conductivity is the amount of heat that moves through a slab with a unit cross-sectional area per second when there is no temperature difference between the two faces.

Conductivity is a helpful indicator of water quality in general. Every body of water has a typical conductivity range that, once determined, can be used as a reference point for comparison with routine conductivity tests.

A medium that contains ions and is electrically conducting due to the mobility of those ions but does not conduct electrons is called an electrolyte. This contains the majority of salts, acids, and bases that are soluble when dissolved in polar solvents like water.

Along with magnesium, calcium, phosphate, and bicarbonates, sodium, potassium, and chloride are the important electrolytes. We obtain electrolytes from our diet and drinks. Unbalanced amounts of these electrolytes might result in either high or low levels.

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Answer:

binomial

Explanation:

because the fact that macromolecules is carry out with functions constant-1,2,3,4 etc

Answer:

potential energy

Explanation:

they only store energy, so they’re not using it which would be kinetic energy.

Based on the balanced reaction equation, 9 moles of carbon dioxide are formed when 3 moles of propane are combusted.

From the balanced reaction equation we can see that 3 moles of carbon dioxide are formed upon the combustion of a single mol of propane:

C₃H₈ + 5 O₂ → 3 CO₂ + 4 H₂O

These molar ratios are constant and enable us to set up a simple proportion:

1 mol of propane : 3 mol of carbon dioxide = 3 mol of propane : X

X = 3 mol of carbon dioxide * 3 mol of propane / 1 mol of propane

X = 9 mol of carbon dioxide

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Answer:

A= solid

B= Melting and freezing

C= Liquid

No, at least one segment length is not preserved, making this a nonrigid transformation.

This transformation is nonrigid since it does not retain the length of at least one segment.

An isometry, often known as a rigid transformation of the plane, preserves length.

Reflections, translations, and rotations, are a combination of these three transformations and are all considered "rigid transformations".

The idea of a rigid transformation is that neither the size nor the shape is changed.

The second response, which results in a unit with a length of 5 units, is valid because segment JK's length of 2 units is not preserved when it is mapped onto segment J'K'.

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The partial pressure of oxygen when the mixture is delivered at pressure of 8.2 atm is 0.020 atm.

Each gas that makes up a mixture of gases has a partial pressure, which is the notional pressure of that gas as if it alone filled the original combination's complete volume at the same temperature.

The formula, which calculates partial pressure,

Total pressure = partial pressure Mole fraction

Mole proportion of oxygen in a mixture is equal to the sum of the moles of oxygen and helium.

109 grams are equal to one gigagram, or gg.

= 2 × 10⁹/32 /2 × 10⁹/32 + 98 × 10⁹ / 4

= 2.54 × 10⁻³

oxygen's partial pressure is equal to its mole fraction plus its overall pressure.

= 2.54 × 10⁻³ × 8.0 atm

= 0.02032 atm

= 0.020 atm

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Answer:

i dint not knowwws wj

example

Explanation:

this is so hard someone give answer

a density is a height and can the numbers

maid that because is too long with a

short 40.-- micality

hope itz help

Following are the methods to unplug this drain without physically touching the blockage.

1. Pour hot, boiled water down a drain.

If you choose to attempt to clear a grease blockage on your own and you are certain that your plumbing system is made up of metal pipes rather than plastic, you might try flushing it out with hot water. If your pipes are constructed of plastic, we wouldn't recommend trying this because you run the risk of melting or weakening the joints.

2. Hot water and vinegar

A 50:50 solution of hot, boiling water and vinegar performs similarly to the commercial chemical drain cleaner (and is just as effective). The advantage of a homemade vinegar and water solution is that it is non-toxic and substantially less corrosive than commercial drain cleaners. Grease that has accumulated on the inside walls of your pipes is dissolved by warm water and vinegar. Give yourself another dose a few minutes later if the first dose doesn't work.

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Average molar mass of sulfur is 32.80 g/mol

The average atomic mass of a chemical element is calculated by taking into account the atomic masses of its naturally occurring isotopes and their respective abundances

Here given data is

95.0% sulfur= 32 (31.97 amu)

0.75% sulfur= 33 (32.97 amu)

4.21% sulfur= 34 (33.96 amu)

We have to find average molar mass of sulfur = ?

Average molar mass = ∑i × isotope of i × abundance of i

Average molar mass = 31.97×95.0 + 32.97 ×0.75 + 33.96×4.21

Average molar mass = 32.80 g/mol

Average molar mass of sulfur is 32.80 g/mol

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The cloud of electrons surrounding the nucleolus of an atom takes up all the volume or space.

The simplest unit of matter is the atom. As matter makes up everything in the universe (apart from energy), atoms are the building blocks of matter.

The protons, neutrons, and electrons that make up an atom are three different types of incredibly small particles known as subatomic particles. The nucleus of the atom, which is made up of protons and neutrons, is where all the action happens, and an electron cloud flies around it.

In contrast to the protons, which have a positive charge, electrons have a negative charge. Both protons and electrons are equal in number in a typical (neutral) atom. The quantity of neutrons is also usually the same, though not always.

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The addition of ice at the end of the heating process is important because it increases the solubility of the aspirin product.

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