consider the following polymer sample: number of molecules mass of each molecule (micrograms) 5 10,000,000 10 5,000,000 25 800,000 50 1,000,000 100 2,000,000 compute the weight average molecular weight of this sample to 3 significant figures.

Neutron diffraction, on the other hand, is commonly used to determine magnetic structures in materials due to the interaction of neutrons with magnetic moments.

X-ray diffraction, electron diffraction, and neutron diffraction are commonly used techniques to study the crystallographic properties of solids.

Here's a comparison of these three techniques in terms of particle energies and types of information obtained:

Particle Energy:

X-rays have high energy in the electromagnetic spectrum.

Information Obtained:

X-ray diffraction provides information about the arrangement of atoms within a crystal lattice, crystal symmetry, interatomic distances, and crystal plane orientations.

It is widely used for structural determination of crystalline materials.

Surface Crystallography:

X-ray diffraction is suitable for studying the bulk crystal structure and is less appropriate for surface crystallography due to the low penetration depth of X-rays in materials.

Particle Energy:

Electrons can have high energies (e.g., in electron microscopy) or low energies (e.g., in electron diffraction experiments).

Information Obtained:

Electron diffraction can provide detailed structural information about crystals, including crystal symmetry, lattice parameters, and atomic arrangement.

It is particularly useful for studying small crystals, nanostructures, and thin films.

Surface Crystallography:

Electron diffraction can be used to study surface crystallography, as electrons can penetrate the surface layers of materials.

Particle Energy:

Neutrons have intermediate energy levels.

Information Obtained:

Neutron diffraction provides information about atomic positions, magnetic moments, and magnetic structures of materials.

It is particularly sensitive to light elements and can be used to determine the positions of hydrogen atoms in crystal structures.

Surface Crystallography:

Neutron diffraction is less commonly used for surface crystallography due to the limited penetration depth of neutrons in materials.

For studying surface crystallography, electron diffraction is generally the most appropriate technique due to its ability to penetrate surface layers and provide detailed structural information at the nanoscale.

Neutron diffraction, on the other hand, is commonly used to determine magnetic structures in materials due to the interaction of neutrons with magnetic moments.

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Answer:

The extent of carbon emission to the atmosphere will reduce thereby decreasing the amount of carbon that is released into the atmosphere in the carbon cycle if we all use bicycles instead of driving around our neighborhood.

If we choose to turn our appliances off, less coal is extracted and burnt to generate energy thereby also reducing the extent of carbon dioxide emission.

Explanation:

The carbon cycle may be defined as all the sequence of processes that involve the interconversion of carbon compounds to various species in nature. It refers to process such as; incorporation of carbon dioxide into living tissue by photosynthesis and ingestion of organic matter by animals, its return to the atmosphere through respiration, the decay of dead organisms, and the burning of fossil fuels.

Fossil fuels are generally a very important source of energy. Both gasoline and coal are fossil fuels. The disadvantage of fossil fuels is that the use of fossil fuels increases the concentration of CO2 gas returned to the atmosphere as part of the carbon cycle. This increased CO2 level in the atmosphere leads to greenhouse effect and global warming.

If I and all my neighbors decide to turn off our appliances when they are not in use, less energy is consumed and less coal is burnt for energy thereby reducing the amount of carbon dioxide that is emitted back to the atmosphere in the carbon cycle.

Similarly, if we all ride bicycles while running errands around our neighborhood, less gasoline is burnt as fuel and less carbon dioxide is emitted back into the atmosphere in the carbon cycle.

If less carbon dioxide is emitted into the atmosphere, less carbon dioxide will be available for photosynthetic organisms to take in and this may affect the primary productivity along the food chain. Since plants act as a carbon dioxide sink nature, less carbon dioxide emission will imply less photosynthesis

Answer:

C2H6 has the greatest amount of atoms.

Explanation:

Sodium bicarbonate, lemon juice, and water are three commonly used household chemicals for cooking.


Sodium bicarbonate, also known as baking soda, is a common ingredient in baked goods, as it helps to leaven dough and create a lighter texture. Lemon juice is often used in cooking to add a sour or acidic flavor to dishes, and can also be used as a natural cleaning agent. Water is a crucial ingredient in many recipes and is used for a variety of cooking methods, including boiling, steaming, and poaching. All three of these household chemicals are versatile and widely used in cooking. However, it is important to note that while these chemicals are safe for consumption in small amounts, they should always be handled with care and used in accordance with their intended purposes.

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The balanced equation for the reaction of barium sulfate with carbon from burned paper producing barium sulfide and carbon monoxide is:

\(BaO_{4}S\) + 4C(s) → BaS(s) + 4CO(g)

Word equation from \(BaO_{4}S\)(s) + 4C(s) → BaS(s) + 4CO(g) is

Barium Sulfate + Carbon = Barium Sulfide + Carbon Monoxide

One mole of Bаrium Sulfаte [BаO4S] and four moles of Cаrbon [C] reаct to form one mole of Bаrium Sulfide [BаS] аnd four moles of Cаrbon Monoxide [CO]

1. Lаbel eаch compound (reаctаnt or product) in the equаtion with а vаriаble to represent the unknown coefficients.

a \(BaO_{4}S\) + b C= c BaS + d CO

2. Creаte аn equаtion for eаch element (C, Bа, O, S) where eаch term represents the number of аtoms of the element in eаch reаctаnt or product.

Ba: 0a + 1b = 1c + 0d

C: 1a + 0b = 0c + 1d

O: 0a + 4b = 0c + 1d

S: 0a + 1b = 1c + 0d

3. Simplify the result to get the lowest, whole integer values.

a = 1 (\(BaO_{4}S\))

b = 4 (C)

c = 1 (BaS)

d = 4 (CO)

4. Count the number of аtoms of eаch element on eаch side of the equаtion аnd verify thаt аll elements аnd electrons (if there аre chаrges/ions) аre bаlаnced.

\(BaO_{4}S\) + 4 C = BaS + 4 CO

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There are 44 grams of carbon contained in one mole of C3H8. Details about mass can be found below.

The mass of a substance can be calculated by multiplying the number of moles of a substance by its molar mass.

According to this question, one mole of propane (C3H8) was given.

Molar mass of C3H8 = 12(3) + 1(8) = 44g/mol

Mass of C3H8 = 44g/mol × 1 = 44g

Therefore, there are 44 grams of carbon contained in one mole of C3H8.

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The half-life of the radium isotope ra-226 is approximately 1,599 years. After 800 years, the remaining amount of the isotope is 70.71% of its initial quantity.

The decay formula is given by:

N(t) = No . (1/2)^(t/T)

Where:

N(t) = remaining quantity of the substance at time t

No = initial quantity

t = elapsed time

T = half-life

In the given problem:

t = 800 years

T = 1599 years

Therefore,

N(t) = No . (1/2)^(800/1599)

N(t) = 0.7071 No

N(t)/No = 0.7071 = 70.71%

Hence, the remaining amount of the isotope is 70.71%

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Yes, the can will sweat in the given conditions.

When a cold object comes in contact with a warm, humid environment, it causes the air around the object to cool down, leading to condensation of water vapor from the air onto the surface of the can. This process is known as sweating. The temperature difference between the can and the surrounding air, along with the relativehumidity, determines the amount of condensation. In this case, the temperature of the can is lower than the room temperature, and the relative humidity is high enough to cause the can to sweat.

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The question that will best help the student to classify the material is; "is the material malleable or ductile?"

Generally, materials can be classified as metals or non metals. There are properties that are particular to metals and there are properties that are particular to nonmetals and these properties can be used to identify each one of the materials.

The question that will best help the student to classify the material is; "is the material malleable or ductile?" These metallic properties.

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Missing parts;

A student is trying to classify an unidentified, solid gray material as a metal or a nonmetal. Which question will best help the student classify the material? A. Is the material malleable or ductile? B. Does the material feel hard to the touch? C. Will the material float in water? D. Does the material feel rough or smooth?

Answer:

chloroplasts

Explanation:

Answer:

photosynthesis (i am not sure of answer choces, but this is the answer

Explanation:

Green plants have the ability to make their own food. They do this through a process called photosynthesis, which uses a green pigment called chlorophyll. ... Chlorophyll's job in a plant is to absorb light—usually sunlight. The energy absorbed from light is transferred to two kinds of energy-storing molecules. I also remember this from Science.

PLZ TELL ME IF RIGHT, 5 STAR AND BRAINLEST ONLY IF RIGHT

The effect of increasing the pressure of H2 gas in the cathode compartment on the electromotive force (emf) of the cell depends on the type of cell being considered.

In a hydrogen fuel cell, where hydrogen is oxidized at the anode and combined with oxygen at the cathode to produce water, increasing the pressure of H2 gas in the cathode compartment will have no direct effect on the emf of the cell. The emf of a hydrogen fuel cell is primarily determined by the redox reactions occurring at the anode and cathode, as well as the electrochemical potentials of those reactions. Therefore, increasing the pressure of H2 gas in the cathode compartment will not cause a change in the emf of the cell. On the other hand, if we consider a concentration cell, where the emf is based on the difference in concentration between the anode and cathode compartments, increasing the pressure of H2 gas in the cathode compartment would result in an increase in the emf of the cell. This is because the increased pressure would cause a higher concentration of H2 gas in the cathode compartment, leading to a greater concentration gradient between the anode and cathode compartments and thus an increased emf.

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A hydrocarbon is a substance made up of carbon and hydrogen atoms. These are the most basic biological substances, and they are widely distributed in nature, especially in fossil fuels like coal, oil, and natural

Organic substances known as hydrocarbons are made up of hydrogen and carbon atoms. They are the most basic kind of organic molecules and come in solids, liquids, and gases, among others. In nature, hydrocarbons are widely distributed and serve as the main building blocks of fossil fuels including coal, oil, and natural gas. They are also widely utilised in industry as fuels, solvents, and raw materials for the creation of compounds like as polymers and rubber. Alkanes, alkenes, alkynes, and aromatic hydrocarbons are a few of the numerous forms of hydrocarbons, each having distinct characteristics and applications. Methane, propane, benzene, and octane are a few typical hydrocarbons.

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Answer:

I'd say Water

Explanation:

The plant absorbs more water through the roots not sure if i'm correct.

Answer:

80,000km/h

Explanation:

Answer: 12.5 hope this is right.

Explanation:

Answer:

They move freely between the clouds of several atoms, si the correcto Answer is D

Explanation:

Hope this helps.

The hybrid orbitals used by the bolded atom in acetone (CH₃COCH₃) are sp2 (Option B).

Hybrid orbitals result when atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. The wave functions combine through a process called hybridisation. The central carbon atom is bonded to three other atoms: two carbon atoms and one oxygen atom. It has a double bond with the oxygen atom and single bond with the two carbon atoms. This arrangement corresponds to a trigonal planar geometry, which means the hybrid orbitals used by the central carbon atom in acetone are sp2.

Thus, the correct option is B (sp2).

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Answer:

True

Explanation:

Answer: When a combination reaction occurs between a metal and a non-metal the product is an ionic solid.

Explanation: Another hint(s): When magnesium burns in air, the atoms of the metal combine with the gas oxygen to produce magnesium oxide. This specific combination reaction produces the bright flame generated by flares.

The most likely product for this reaction will be A. K2CO3(aq) + H20(l).

It should be noted that a chemical reaction simply means a process where one or more substance which are known as the reactants are converted to another substance which is the product.

In this case, the most likely product for this reaction will be K2CO3(aq) + H20(l). It should be noted that the products are the result of the chemical reaction that is gotten from the reaction. It's the rearrangement of the reactants.

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Answer:The most likely product for this reaction will be A. K2CO3(aq) + H20(l).

Explanation:

The false statement regarding Polymerase Chain Reaction (PCR) is: Three primers hybridize to the DNA sequence.

So, the correct answer is C.

In reality, PCR typically uses only two primers that bind to the complementary sequences of the target DNA. These primers flank the target region, allowing the DNA polymerase, such as the heat-resistant Taq polymerase, to amplify the specific target sequence.

PCR is an in vitro technique, performed in a test tube, and can generate up to one billion copies of the target sequence through multiple cycles of heating and cooling, which facilitate DNA denaturation, primer annealing, and elongation by the DNA polymerase.

Hence, the answer of the question is C.

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Answer:

Independent: sizes of nails

Dependent: number of paper clips

Controlled: Battery, wire and type of nails

Explanation:

An independent variable is a variable which when changes does not the effect the results of the experiment. It does not depends upon the dependent variable.

A dependent variable is defined as a variable which is affected when the independent variable is changed by the researcher or the experimenter. It depends greatly upon the independent variable.

While a controlled variable is that variable whose value is not changed in an experiment. It contains all the constants.

In the context,

the independent variable are : sizes of nails

the dependent variables are : number of paper clips

the Controlled variables are: Battery, wire and type of nails

Answer:

#2 bro

Explanation:

Answer: protons and electrons

Explanation: :)

The percent of chloride ion in a sample if 2. 500 g of the sample produces 1. 750 g of agcl when treated with excess ag⁺ is 17.2 percent.

What is mass percent?

The ratio of the mass of the solute contained in a solution to the mass of the solution as a whole is known as the mass percent.

Explanation:

Given:

Mass of sample = 2. 500 g

Mass of AgCl = 1. 750 g

The percent of chloride ion in a sample is calculated as,

Molar mass of AgCl = 143.32 g/mol

\(Molar mass of Chlorine atom = 35.45 g/mol\)

Assume that all of the sample's chlorine has precipitated into silver chloride. As a result, the amount of chlorine in silver chloride will match the amount of chlorine in the sample.

First we have to find mass of chlorine,

\(In 143.32 g of silver chloride, mass of chlorine present is 35.45 gSo, in 1.3487 g of silver chloride, mass of chlorine present will be =35.45g/143.32 g * 1.750 g = 0.43 g\)

Therefore, the percent of chloride ion in a sample is

\(Mass of pure chloride compound = 2.500 gMass of chlorine = 0.43 g%Chlorine = 0.43/2.5 *100%Chlorine = 17.2 %\)

Hence, the percent of chloride ion in a sample is \(17.2%\) percent.

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Answer:

See the answer below

Explanation:

In chemistry, indicators are substances that are capable of changing colors with respect to the pH. Each indicator has its characteristic color in acidic pH and another characteristic color in alkaline pH.

Methyl orange indicator appears red in acidic solution and yellow in basic solutions. Phenolphthalein is usually colorless in acidic solutions and appears pink in basic solutions. A red litmus paper will turn blue in alkaline solutions while a blue litmus paper will turn red in acidic solutions.

Answer: there is more atoms of each element on the right.

Explanation:

On the left of the arrow you have:

Si-1

F-4

H-4

O-2

On the right of the arrow you have:

Si-3

F-6

H-8

O-4

A balanced equation always has the same amount of each element on the left of the arrow (the reactants) as the right (the products). This isn’t balanced because you have a lot more of each element on the right.

The given chemical reaction should not be balanced correctly because there are more atoms of every element on the right.

On the left of the arrow you have:

Si-1

F-4

H-4

O-2

Now

On the right of the arrow you have:

Si-3

F-6

H-8

O-4

We know that when the chemical equation should be balanced so the reactants and the products contains the same numbers. Due to this, it is not a balanced chemical reaction.

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Answer:

It increases

Explanation:

The atomic radii increases because you are adding more shells/electrons

When a thermal energy is applied to a container of gas the volume of the gas will increase

Heating a gas makes its atoms and molecules move faster and that way increases the kinetic energy of the particles causing the gas expansion and the increase of its volume and pressure.

Otherwise when the thermal energy is removed, the atoms or molecules start to move slower and become denser until the substance condenses.

Common examples of  kinetic energy due to thermal energy are: rubbing the hands, baking in an oven, boiling water, when the seat of the car are heated.

It is the energy possessed by a body due to its relative motion. It is usually expressed in Joules (J).

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The ideas held by the ancient Greeks have been at least partially supported by scientific experiments include:

This is a phenomenon in which a quantum entity can be referred to as a wave or a particle.

An example is light which has this feature and has been severally proven through series of experiments such as photoelectric effects etc.

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