What will the effect be on the resolution and Rf values in the following situations? (paper chromatography experiment)

a) The watch glass is left off the beaker during the run
b) The chromatogram was left in the beaker too long so that the solvent front went all the way to the top of the paper in 5 minutes before the paper was removed
c) The spots were too big
d) A student used a shorter piece of chromatographic paper

The coefficient in an equation for a chemical reaction that is balanced reveals some details about the chemical process.

An equation for a chemical reaction is considered to be balanced if both the reactants and the products have the same number of atoms and total charge. In other words, the mass and charge balances on both sides of the reaction are equal.

The coefficient in a balanced chemical reaction equation provides us with the following details about the reaction:

Coefficient tells us, the relative number of moles of each substance involved in a chemical reaction.

For example,

2H₂ + O₂----> 2 H₂O

That's mean, 1 moles of oxygen gives 2 moles of H₂O on reacting with 2 mol of Hydrogen.

The coefficient in a chemical equation tells us also, the number of molecules of reactants and

products involved in a chemical reaction. For example,

N₂ + 3 H₂. -----> 2 NH₃.

Their are, 1 molecule of Nitrogen and 3 molecules of Hydrogen gives 2 molecules of  NH₃. therefore

coefficient tells us this information also.

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During the cementation phase of lithification, the two minerals that most commonly precipitate into the spaces between clasts, to form cement are Quartz and calcite.

Some sedimentary rocks are "poorly cemented," meaning they could fall apart in your hands. The two minerals that make up the cement in sedimentary rocks most frequently are quartz and calcite. rock with chemical sediments rocks are composed of minerals that accumulated and solidified in water.

Therefore, The lithified counterparts of sediments are sedimentary rocks. They are primarily created by solidifying unconsolidated sediments that already exist via cementing, compacting, and other means.

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Ionic bonds are formed between a metal and non-metal  by losing electron from the metal. Daily life examples of ionic compounds are table salt, baking soda, Epsom salt etc.

Ionic compounds are inorganic compounds with strong ionic bonds formed between a metal and non-metal.

When an electropositive atom donates its electron into an electronegative element, there creates an intermolecular force of attraction. The bonded electron are pulled towards the electronegative element.

We have everyday examples of ionic compounds such as table salt, Epsom salt, baking soda or sodium carbonate etc. Table salt that is sodium chloride or NaCl we use it every day is an ionic compound.

The metal sodium donates it electron to chlorine creates the ionic bond in NaCl. Similarly in sodium carbonate and sodium bicarbonate, ionic bonds  are formed between sodium metal and carbon.

Therefore, we can find more compounds and models for ionic bonding in daily life such as salt, baking soda etc.

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Answer:

B potential energy

(kinetic energy is energy that is already moving)

sorry if im wrong

     The largest organ of the body, the skin is composed of water, protein, lipids, and minerals. Your skin controls body temperature and guards against infections.

Answer is C, Human Skin

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The problem with non-renewable resources is given enough time, we run out of them

Non renewable resources means the energy resources include coal, natural gas, oil and also nuclear energy and once this resources are used up then they cannot be replaced again which is the major problem fir humanity and if we run out of non renewable resources then the global economy will be constrained to a semi local condition as there will be no more fuel to move product around so this is also the problem with non renewable resources

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PF5 molecule is predicted to have a molecular geometry that is trigonal bipyramidal.

You may recognize PF5 on a VSEPR chart as a compound with a trigonal bipyramidal molecular structures once you know it has five electron pairs. The equatorial-equatorial bonds are 120 ° distant from one another, while all other bond angles are 90 °, giving it a total of two bond angles of 90 ° and 120 °.

Valence shell electron pair repulsion is the name given to the underlying concept in molecular structures (VSEPR). In essence, it states that because electron pairs are made up of negatively charged particles, they are attracted to one another and try to keep as far apart as possible.

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The Oobleck mixture is neither a liquid nor a solid. The cornstarch-and-water solution produces a fluid that behaves more like quicksand than water applying force causes it to thicken.

A mixture is a substance made up of two or more chemical components that do not combine chemically.

A compound produced by combining two or more different ingredients without triggering a chemical reaction is another way to describe it.

There are two types of mixture.

Thus, the Oobleck mixture is neither a liquid nor a solid. The cornstarch-and-water solution produces a fluid that behaves more like quicksand than water applying force causes it to thicken.

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Answer:

A

Explanation:

Radiant energy.......

A)compute the mole of AgNO3 first.

volume, when V=1.92 L

use:

amount of mole,

n = Volume * Molarity

  = 0.18*1.92

  = 0.3456 mole

In light of the balanced equation

AgNO3 = (2/2)*moles of AgCl produced

            = (2/2)*0.3456

           = 0.3456 mole

This is the quantity of AgCl moles.

AgCl molar mass,

MM equals 1*MM(Ag) + 1*MM (Cl)

    = 1*107.9 + 1*35.45

    = 143.35 g/mole

use: volume of AgCl,

M = Molar Mass * Molar Number

   = 1.434*102 mole/mole x 0.3456 mole

   = 49.54 g

Response: 49.5 g

B)Here: AgNO3 = M=0.18 M

V(AgNO3)=1.92 liters

V (MgCl2) = 3.83 L

A balanced response states:

1 mole of AgNO3 = 2 mole of MgCl2, and vice versa.

2*M(MgCl2)*V = 1*M(AgNO3)*V(AgNO3) (MgCl2)

1*0.18*1.92 = 2*M(MgCl2)*3.83

0.0451 M (MgCl2)

Response: 0.0451 M

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Answer:

love me and I have a good day for the next few months later they are you going for it is a great deal to the world is the only way I have to the only way I can get a

Answer:

The electrons surrounding an atom are located in regions around the nucleus called “energy levels”. An energy level represents the 3-dimensional space surrounding the nucleus where electrons are most likely to be. The first energy level is closest to the nucleus.

hope it helps you

Answer: Energy Levels

Explanation: Key Concepts. The electrons surrounding an atom are located in regions around the nucleus called “energy levels”. An energy level represents the 3-dimensional space surrounding the nucleus where electrons are most likely to be. The first energy level is closest to the nucleus.

The improved telescope showed scientists that the solar system contained comets.

The solar system has to do with the arrangement of the sun and the planets. The sun lies at the center of the solar system and then the sun is surrounded by the planets that move all around the sun in concentric circles.

Now we know that the telescope is the kind of object that could be used in the study of the outer space. We could use it to study the stars as well as other celestial bodies in the study of astronomy.

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A mole is 6.02214076 × 10²³ of any chemical unit, including atoms, molecules, ions, and others. The sample at STP has the same number of atoms as 18 liters of Ne(g) at STP is 18 liters of Ar(g).

A mole is 6.02214076 × 10²³ of any chemical unit, including atoms, molecules, ions, and others. Due to the large number of atoms, molecules, or other components that make up any substance, the mole is a useful measure to utilize.

Number of moles = Mass of substance / Mass of one mole.

The amount (n) of a substance is directly proportional to the volume, according to Avogadro's law (V).

Since the number of atoms in both samples is the same, n1/v1 = n2/v2 and n1 = n2.

v1 = v2 and n1/v1 = n1/v2

Therefore, the correct answer is option (B) 18 liters of Ar(g).

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The most prevalent indicators used in complexometric titrations are organic dyes, which work by generating a clouded complex with the metal ion under test.

The indicator is replaced by EDTA during the reaction to create a more stable complex with the metal, and after the reaction is finished, the colour is changed.

The acronym EDTA stands for ethylenediaminetetraacetic acid. For the titration, an excessive amount of EDTA is used to react with the sample solution's calcium and magnesium ion titrations. When the indicator is applied, it stays blue because the EDTA has complexed with all of the Ca2+ and Mg2+ ions present  for titrations.

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Thus the final pressures of N₂ and H₂ are 825.7317torr and 550.6944torr respectively.

It is given that the Volume(V₁) of nitrogen is 30L and Pressure(P₁) of Nitrogen is 740torr and the temperature(T₁) is 55°C.

Similarly, for hydrogen, the volume(V₁) is 20L and Pressure(P₁) is 650torr and temperature(T₁) is 15⁰C.

These two are pumped into a container of Volume(V₂) of 25L and temperature (T₂) 32⁰C

To find the Final pressure of N₂, the following formula is to be used

P₁V₁/T₁ = P₂V₂/T₂

On substituting the values of P₁,V₁,T₁,V₂,T₂ we get P₂ of N₂ as,

(740x30)/328 = 25xP₂/305K

22200/328 =  25xP₂/305K

67.6829x305 = 25P₂

20643.2926/25 = P₂

825.7317torr = P₂

P₂= 825.7317torr

Therefore, the final pressure of N₂ is 825.7317torr

Similarly to find the final pressure of H₂ by applying the same formula we get,

P₁V₁/T₁ = P₂V₂/T₂

On substituting the values of P₁,V₁,T₁,V₂,T₂ we get,

(650x20)/288 = (P₂x25)/305

13000/288 = (P₂x25)/305

45.1388x305 = 25P₂

1376.3611/25 = P₂

550.6944 = P₂

P₂ = 550.6944torr

Therefore, the final pressure of H₂ is 550.6944torr.

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Barrier that must be overcome before products are formed in a spontaneous reaction is Activation energy barrier.

A spontaneous response is a response that favors the formation of products on the conditions underneath which the response is occurring. A roaring bonfire is an instance of a spontaneous response, in view that it is exothermic (there is a decrease inside the power of the system as energy is released to the environment as warmth).

Maximum spontaneous chemical reactions are exothermic - they release warmness and heat up their surroundings: for instance: burning wooden, fireworks, and alkali metals introduced to water. When a radioactive atom splits up, it releases strength: that is a spontaneous, exothermic nuclear reaction.

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Step 1

Empirical formula definition:

In chemistry, the empirical formula of a chemical compound is the simplest whole-number ratio of atoms present in a compound.

-----------------

Step 2

Information provided:

Composition,

50.7 % C

9.9 % H

39.4 % N

-----------------

Step 3

Assuming a 100 grams sample:

50.7 % C => 50.7 g C

9.9 % H => 9.9 g H

39.4 % N => 39.4 g N

-----------------

Step 4

The number of moles of each element is calculated as:

(Please, use your periodic table)

50.7 g C x (1 mole C/12.01 g C) = 4.22 moles C

9.9 g H x (1 mole H/1.008 g H) = 9.82 moles H

39.4 N x (1 mole N/14.00 g N) = 2.81 moles N

-----------------

Step 5

Each number in step 4 will be divided by the smallest one of the 3. It is also needed integer numbers.

4.22 moles C/2.81 moles N = 1.5

9.82 moles H/2.81 moles N = 3.5

2.81 moles N/2.81 moles N = 1

As we need integer numbers, we will multiply all these numbers by 2 as it follows:

C => 1.5 x 2 = 3

H => 3.5 x 2 = 7

N => 1 x 2 = 2

Therefore, the empirical formula will be:

Answer:

When a tree is growing on a rock its weight can crush the rock, as a form of mechanical weathering is not a way trees are considered to affect weathering

Weathering is a process that breaks down or disintegrates the rocks which are present on the surface of our planet. Biological life can also affect weathering in many ways.

Tree roots can grow through rock cracks causing the cracks to expand. Sprouts can start to grow near cracks in rocks. The sprout when it grows would start to put pressure on the rocks by the roots that would penetrate them and also by the weight it exerts when it turns to a tree.

Tree’s roots (and other vegetation) can release acids that can cause weathering of rock. Plants are capable of producing acids to protect themselves against invaders like microbes and insects. When plants release acids, it would change the chemical composition of the rock that would eventually break the rock. This type of weathering is called chemical weathering

Trees (and other vegetation) when decomposing can cause chemical weathering. When trees decompose it could produce acids like carbonic acid that would help in disintegration of rocks.

When a tree is growing on a rock its weight would not directly crush the rock, as a form of mechanical weathering. Rocks with crack would be the main source of mechanical weathering by rocks.

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The following statements from the given questions are correct.

There are 2 atoms of carbon in one molecule of acetic acid.

There are 4 moles of hydrogen atoms per mol of acetic acid.

If we look at the chemical formula of the acetic acid (CH3COOH) There are two carbon atoms.

The number of moles of Hydrogen is four because there are 4 hydrogen atoms present in acetic acid.

The remaining options are incorrect because the molar mass of acetic acid is 60.05 g/mol and there are 32.00 amu of oxygen per molecule of acetic acid.

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ATcase is an allosteric enzyme it has two subunits, one is a catalytic subunit and another one is a regulatory subunit.

What is aspartate transcarbamoylase?

Aspartate carbamoylase is also known by the acronym ATCase. It contains two polypeptides with distinct functions. One is a catalytic unit (carrier carbomylation of the amino group) and the other is a regulatory subunit with regulatory sites. This enzyme catalyzes the formation of N-carbamoylaspartate and inorganic phosphate from carbomoyl phosphate and aspartate. This reaction is the initial step in the synthesis of pyrimidine.

A histidine residue in the active region of aspartate transcarbamoylase is essential for stabilizing the transition state of the bound substrate. In the transition state, the protonated form of histidine stabilizes the negatively charged carbonyl oxygen atom of the scissile bond. Histidine in its deprotonated form inhibits enzyme activity. Therefore, the predicted rate at a pH of 6.5 will be half the maximum and will drop as the pH increases.

Hence, the predicted rate at a pH of 6.5 will be half the maximum and will drop as the pH increases.

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Yes, the photoelectron spectra (C, N, O, F, Ne) suggest a need to refine shell model of atom.  the another model that provides a better explanation of this data is

The PES data for n=2 we are getting 2 different peaks for elements C, N, O, F, N . That led to the concept of introduction of   existence subshells   within the shell of an atom. one peak for n=1 one indicates there is one subshell that is donated by 1s-subshell .Maximum capacity of accommodating electron in 1s-subshell is 2.    2 different peaks for elements C, N, O, F, N means for n=2 we have two different subshells .These are donated by 2s and 2p.Maximum capacity of accommodating electron in 2s-subshell is 2 and that in 2p is 6.

The relative energy of electrons in atoms and molecules are measured experimentally using a method called photoelectron spectroscopy (PES). PES is frequently used by scientists to evaluate molecular bonding or to investigate the elemental composition of materials. However, in this article, we'll utilize PES to further our understanding of atomic structure. By examining PES data for pure samples of elements, we'll show how photoelectron spectroscopy directly supports ideas like electron shells and subshells, arrangements of electrons, and more.

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Answer is yes because to say that the tank is half empty would mean that all the oxygen molecules only occupy half or less of the tank.

Answer:

c Two hydrogen one oxygen

Explanation:

H2O

Answer:

Compound

Explanation:

A substance that consists of two or more types of atoms which have been combined chemically is a compound.

The molarity of glucose in blood before eating is  0.00666 M

Molar concentration is the degree of the concentration of a chemical species, especially of a solute in a solution, in phrases of quantity of a substance per unit quantity of answer. In chemistry, the most usually used unit for molarity is the variety of moles in line with liter.

We are given the human blood ranges from about 80 mg/dL before meals to 120 mg/dL after eating.

1 dL = 0.1 L

Mass of glucose before meal = 80 mg = 0.080 g

Mass of glucose after eating = 120 mg = 0.120 g

So, moles of glucose = 0.080 g / 180.16 g/ mol

                                 = 0.000444 moles

Moles of glucose = 0.120 g / 180.16 g/mol

                            = 0.000666 moles

So, molarity of glucose in blood before eating = 0.000444 moles / 0.1 L

                                                                              = 0.00444 M

molarity of glucose in blood after eating = 0.000666 moles / 0.1 L

                                                                  = 0.00666 M

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Because water is a polar molecule and carbon dioxide is a nonpolar molecule, water has a greater boiling point than carbon dioxide. Since polar molecules have greater intermolecular interactions than nonpolar ones, polar molecules like water require more energy or heat to disintegrate.

It is highly challenging to break the bonds that make up the massive water molecule due to its substantial hydrogen bonding.

The temperature at which a chemical's vapor pressure equals atmospheric pressure is known as the boiling point.

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"formaldehyde"

A naturally occurring organic substance with the chemical formula CH2O and the structural formula HCHO is formaldehyde. The pure substance, which is a strong, colorless gas that spontaneously polymerizes into paraformaldehyde, is kept in an aqueous solution that is also employed to preserve animal specimens.

At room temperature, volatile organic compounds (VOCs), which are organic chemicals, have a high vapour pressure. The ratio of the sample's molecule in the surrounding air, or volatility, is correlated with low boiling point with high vapor pressure.

Along with being pollutants, VOCs are also responsible for smells and perfumes' odor. VOCs are crucial for interaction among animals and plants, acting as attractants for pollinators, predator defense, and even interactions between individual plants. Some VOCs are harmful to the environment or pose a risk to human health. Laws are in place to control anthropogenic VOCs, especially indoors where concentrations are highest. Although the majority of VOCs are not immediately harmful, they may have long-term, chronic health impacts.

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