mse 2001 compared to a semi-crystalline polymer of the same composition, a completely amorphous polymer is expected to:

Sleet ,freezing of raindrops, snowflakes Precipitation

are 4 non examples of condensation .

What is condensation ?

Condensation, the separation of a liquid or solid from a vapor, generally occurs on surfaces that are cooler than the adjacent gas. A substance condenses when the pressure exerted by that vapor exceeds the vapor pressure of the substance's liquid or solid phase at the temperature of the surface on which condensation is occurring. As the steam condenses, heat is released. If this heat is not removed, the surface temperature will rise until it matches the surrounding steam.

If the air does not contain small particles, so-called aerosols, condensation will only occur if the air is extremely supersaturated with water vapor.

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so, to calculate the molar of the monoprotic weak acid ;

first, we write the reactions

HA +NaOH → NaH +H20

42.0ml NaOH ( 1l NaOH / 1000 ml NaoH ) (0.250 m/ 1l NaOH) (1 mol HA/ 1 mol NaOH)

0.0105 moles HA

now, we calculate the molar mass

molar mass= mass/ moles

                   = 0.483 grams/ 0.0105 moles

                   = 46 grams/moles

the molar mass of the monoprotic weak acid is 46grams/moles

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Answer:

to drink

Explanation:

we all need water to drink without it we'll all be dead

The primary difference between the oxidation of glucose to CO₂ by glycolysis and the critic acid cycle vs by the pentose phosphate is the glycolysis occurs in cytosol. to CO₂ is release of CO₂ is in mitochondria and in the pentose phosphate CO₂ is generated in the cytosol.

When the glucose oxidation takes place  by glycolysis and the citric acid cycle , the total catabolism will occur. The energy is released and this energy is trapped in ATP. in this glucose is catabolizes. in pentose phosphate  CO₂   is generated in the cytosol.

Thus, The primary difference between the oxidation of glucose to CO₂ by glycolysis and the critic acid cycle vs by the pentose phosphate is the glycolysis occurs in cytosol. to CO₂ is release of CO₂ is in mitochondria and in the pentose phosphate CO₂ is generated in the cytosol.

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I would have to go with D

Hope this helps

Answer:

just give the other person brainliest

Explanation:

The new concentration results in 0.512 M.

The concentration of a substance is the quantity of solute found in a given amount of solution. Concentrations are normally expressed in terms of molarity, defined because of the variety of moles of solute in 1 L of answer.

Calculation:-

final conc=m1v1+m2v2/(v1+v2)

final conc=209 × 0.71+407 ×0.41/(407+209)

final conc = 0.512 M

Concentration is the abundance of a constituent divided by way of the overall volume of an aggregate. several sorts of mathematical descriptions may be outstanding: mass concentration, molar concentration, variety concentration, and extent awareness.

The Concentration of an answer is a measure of the quantity of solute that has been dissolved in a given amount of solvent or answer. A concentrated answer is one that has a rather huge quantity of dissolved solute.

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amount of bromoacetic acid = 22.2 grams

amountof sodium bromoacetate = 6.47 grams

Total concentration = 0.200 M

[CH2BrCOOH] + [CH2BrCOONa] = 0.200 M     ...(1)

Ka = 2.00 x 10-3

pKa = -log(Ka)

pKa = -log(2.00 x 10-3)

pKa = 2.70

According to Henderson - Hasselbalch equation,

pH = pKa + log([conjugate base] / [weak acid])

2.100 = 2.70 + log([CH2BrCOONa] / [CH2BrCOOH])

log([CH2BrCOONa] / [CH2BrCOOH]) = 2.100 - 2.70

log([CH2BrCOONa] / [CH2BrCOOH]) = -0.60

[CH2BrCOONa] / [CH2BrCOOH] = 10-0.60

[CH2BrCOONa] / [CH2BrCOOH] = 0.252      ...(2)

Solving equations (1) and (2)

[CH2BrCOOH] = 0.160 M

[CH2BrCOONa] = 0.040 M

moles CH2BrCOONa = (molarity CH2BrCOONa) * (volume of buffer in Liter)

moles CH2BrCOONa = (0.040 M) * (1.00 L)

moles CH2BrCOONa = 0.040 mol

mass CH2BrCOONa = (moles CH2BrCOONa) * (molar mass CH2BrCOONa)

mass CH2BrCOONa = (0.040 mol) * (160.93 g/mol)

mass CH2BrCOONa = 6.47 g

moles CH2BrCOOH = (molarity CH2BrCOOH) * (volume of buffer in Liter)

moles CH2BrCOOH = (0.160 M) * (1.00 L)

moles CH2BrCOOH = 0.160 mol

mass CH2BrCOOH = (moles CH2BrCOOH) * (molar mass CH2BrCOOH)

mass CH2BrCOOH = (0.160 mol) * (138.95 g/mol)

mass CH2BrCOONa = 22.2 g

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High explosive elements should be placed on the right side of the periodic table and lower explosive elements should be placed on the left side.

We will organize the periodic table starting from least explosive to high explosive just like the arrangement is done in the modern periodic table in which elements having lower atomic numbers are present on the left side of the periodic table whereas the elements having higher atomic numbers are placed on the right side of the periodic table.

What is the periodic table?

The periodic table is the tabular arrangement of all the chemical elements on the basis of their respective atomic numbers.

Why the periodic table is important?

The periodic table of elements puts all the known elements into groups with similar properties.

Thus, lower explosive elements are placed on the left and high explosive elements are placed on the right of the periodic table.

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If 17 grams of silicon are required, then 7.2 grams of Mg are needed to react.

The balanced chemical equation of the reaction of SiCl₄ and Mg is,

SiCl₄ + 2Mg → Si + 2MgCl₂

So, as we can see from the reaction,

2 moles of Mg reacts, it forms one mole of silicon.

We know,

Moles = Mass/molar mass

we can write,

2 moles of Mg = mole of Si

2 x mass/molar mass = mass/molar mass

Molar mass of Si is 28 g/mol.

Molar mass of Mg is 24 g/mol.

The mass of Silicon required is 17 grams.

Putting the values,

2 x mass/24 = 17/28

Mass of Mg required is 7.2 grams.

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Answer:

C) lattice of neutral atoms with delocalised electrons

Explanation:

Fact 1: metals are elements and therefore they contain atoms that are electrically neutral

Fact 2: in all atoms, the electrons are delocalised/ are free moving electrons (as the electrons serve their purpose in different forms depending whether you look at it the chemistry way or physics way)

metals are solid and hence they have a lattice structure

(tho at my school we focus on giant ionic lattice structure when explaining based on ionic compounds so i can't guarantee that 'giant ionic lattice structure' and 'lattice structure' are the same, hence i just stick with lattice structure for this explanation ^^)

explanation for other options:

they said negative/positive ions which is not true since atoms are electrically neutral

only when the atoms undergo chemical reactions will they be charged

The electronic configuration packing patterns of some elements in group 6b(6) and group 1b(11) reflect the enhanced stability of half-filled and fully-filled sublevels. So option (c) is correct.

The electronic configuration of an element describes how the electrons are distributed in its atomic orbitals. For example, the electron configuration of sodium is 1s²2s²2p⁶3s¹

The three rules that direct the manner in which electrons are to be filled in atomic orbitals are:

Aufbau principle: Electrons must completely fill the atomic orbitals of a given energy level before occupying an orbital of a higher energy level. Electrons fill orbitals in the increasing order of orbital energy level.

Pauli’s exclusion principle: It states that two electrons can never have equal values for all four quantum numbers. Also each subshell of an orbital can have a maximum of 2 electrons and both these electrons must have opposite spins.

Hund’s rule of maximum multiplicity: The subshells in an orbital must be singly occupied before it is doubly occupied. Furthermore, the spin of all the electrons in singly occupied subshells should be the same (to maximize the overall spin).

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The statements that best describe Bridget's recorded observations are:

1 A television is a device that converts electrical energy into heat and light energy.

2 Electrical energy may be converted into other types of energy.

3 Sound energy is created by combining heat and light energy.

4 Electrical energy may be converted into motion energy.

Energy transfer is the process of transferring energy from one system to another, such as by heat, work, or mass transfer.

Energy is required for living organisms to grow, breathe, reproduce, and move. Because energy cannot be created from a vacuum or a void, it must be transported via the biosphere. The sun is the principal source of energy for practically every ecosystem on Earth.

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Full Question:

Bridget performed an investigation to determine if a television set transformed electrical energy into other types of energy. She recorded her observations in a table. What statement best describes the results?

Question Observation

Does it transform into heat energy?

Does it transform into light energy?

Does it transform into sound energy?

Does it transform into energy of motion?

Answer:

You might get nervous and anxiety about meeting up in society

When performing a presumptive blood test with Hemastix, the reason why it necessary to test an unstained area close to the bloodstain under examination as a control is that the likelihood that there is presence of blood, and thus need confirmatory test in lab to know if it is actually blood.

Hemastix reagent strips were initially created for the purpose of detecting blood in urine. It has been determined that this quick and simple test is useful as a presumptive test for the presence of blood.

Note that the presence of a chemical in a sample can be determined or confirmed using a presumptive test, which is a qualitative study. These decisions are typically made following a chemical reaction that results in the production of a certain color. A false positive occurs when a different chemical reacts similarly and yields the desired outcome.

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The molarity of the solution is 0.95M and the concentration of the Silver cation and the concentration of the acetate anion is also 0.95M.

The mass of the Silver Acetate dissolved in the water of volume 125 ml is 20 grams.

We can write the reaction of the dissolution of the Silver Acetate into water as,

CH₃COOAg = CH₃COO- + Ag+

It means that the concentration of the Silver cation and the Acetate anion is equal in the solution of water.

It means that the molarity of the solution will be equal to the concentration of the Silver cation and the concentration of the Acetate and iron in the water.

We know that the molarity of the solution is defined as the number of moles of solute per unit volume of the solution in litres.

Moles = mass/molar mass

Molar mass of the Silver Acetate is 166.91 g/mol.

The mass of silver Acetate dissolved is 20 grams.

So, the moles of silver Acetate is,

Moles = 20/166.91

Molarity of the solution,

Molarity = moles of silver acetate/volume of water

Molarity = 20/166.91 × 1000/125

Molarity  = 0.95

So, the molarity of the Silver Acetate solution is 0.95M.

The concentration of the Silver cation and the concentration of the Acetate anion will be same as that of the molarity of the solution.

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2,726.28 mL solution of propyl alcohol is required to make a 9.17% (v/v) aqueous solution in a 250. ml.

A solution's volume-by-volume percent concentration,

9.17% v/v is a measure of how many milliliters of solute it contains in 100 mL of solution.

In this case,  

9.17% v/v solution will contain -

9.17 mL of solute for every 100 mL of solution.

This means that in order to have propyl alcohol required to make a 9.17% (v/v) aqueous solution in 250 ml  of solute, you need to have

250 mL solute× 100 mL solution/ 9.17mL solute

=2,726.28 mL solution.

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The number of mole of air in the ball, given that the volume of the ball is 5.2 litres is 0.13 mole (Option A)

We'll begin by listing out the given parameters from the question. This is given below:

From the above parameters, we can obtain the number of mole as follow

PV = nRT

61 × 5.2 = n × 8.314 × 305

317.2 = n × 2535.77

Divide both sides by 2535.77

n = 317.2 / 2535.77

n = 0.13 mole

Thus, the number of mole is 0.13 mole (Option A)

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Alpha particles are the only radioactive particle that could have been used in the Rutherford gold foil experiment because they are produced naturally by radioactive nuclides that are alpha emitters and so a steady supply was easy to obtain.

As alpha particles do not travel very far from their radioactive source. They cannot pass through a piece of paper, clothes, or even the layer of dead cells which normally protects the skin.

Rutherford used alpha particles in his gold foil experiment in part because his previous research on radioactive decay discovered alpha particles. He wanted to test how alpha particles, which are positively charged, would react with various forms of matter.

Therefore Rutherford uses alpha particles in the Rutherford gold foil experiment.

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When you are working diligently in the chemistry lab, when suddenly a small explosion occurs in the rear of the room , immediately and automatically capturing your attention, this is an example of Reflexive attention.

Reflexive attention is essentially a semi-autonomous decision making system.

The brain regulates vital body functions such as heartbeat, movements and learning processes. Also, the brain controls the psychological processes such as memory, wakefulness, and attention.

Attention is categorized into two groups; voluntary and reflexive.

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The molarity of potassium acetate in a solution made by adding 50 ml of 2.00 m nitric acid with enough water to make 450.0 ml of solution is 0.22 mol/L.

A chemical species' concentration in a solution, specifically the amount of a solute per unit volume of solution, is measured by its molar concentration. The number of moles per liter, denoted by the unit symbol mol/L or mol/dm³ in SI units, is the most often used unit denoting molarity in chemistry.

We know that, M₁V₁ = M₂V₂

Here, M₁ =?

          V₁ = 450 mL

          M₂ = 2 M

          V₂ = 50 mL

M₁ × 450 = 2 × 50

M₁ = 100/450

M₁ = 0.22 mol / L

Thus, we need 0.22 mol/L of potassium acetate in a solution made by adding 50 ml of 2.00 m nitric acid with enough water to make 450.0 ml of solution.

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Increasing the concentration of N2(g) will causes the equilibrium to shift to the right.

Chemical equilibria can be shifted by changing the conditions that the system experiences. We say that we "stress" the equilibrium. When we stress the equilibrium, the chemical reaction is no longer at equilibrium, and the reaction starts to move back toward equilibrium in such a way as to decrease the stress.

According to Le Chatelier's principle, a change in one of the variables that describe a system at equilibrium produces a shift in the position of the equilibrium that counteracts the effect of this change.

In the synthesis of ammonia the equilibrium will shift to right only when we increase the concentration of N2(g). Because increasing nitrogen gas causes more ammonia to be produced, so the concentration of ammonia must increase.

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The answer is 4.02.

Benzoic acid is a weak acid and sodium hydroxide is a strong base. Benzoic acid and sodium hydroxide react to form sodium acetate and water to form a buffer solution. pH can be measured by measuring the voltage developed between two special electrodes immersed in a liquid solution.

Special glass electrodes are called measuring electrodes. It neutralizes benzoic acid to produce benzoate ions, which enter the water layer, leaving two other organic compounds in the ether. Similarly, nitroaniline does not dissolve under neutral or basic conditions but dissolves in acidic solutions. This clearly shows that formic acid is a stronger acid than benzoic acid.

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The type of protein molecules that is been used to digest food in  the organism are:  

The organelle where energy from nutrients is released is the Mitochondria.

One  inference that can be made concerning a cell that has many of these organelles is that te utilization of the energy is balanced.

The  organelle where energy from nutrients is released is the Mitochondria , this organelles can be described as the one that look tiny  inside cells  and this is very essential in the cell because it helps in the p[roces of releasing energy from food.

It should be noted that this process is been refferd to as process of cellular respiration and this is the reason why the biologist do referred to  mitochondria as the powerhouses of the cell because it involves the use of energy.

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Answer:

What happens when carbon dioxide increases and oxygen decreases? Increasing carbon dioxide and decreasing oxygen make it harder for deep-sea animals to ‘breathe’ About one third of the carbon dioxide that humans produce by burning fossil fuels is being absorbed by the world’s oceans, gradually causing seawater to become more acidic.

Explanation:

Hope this helps

The mass of the products form when baking soda decomposes is 25.00 grams

We can determine the mass of the products formed by simply observing the law of conservation matter (mass). Details below

The law of conservation of matter states that matter can neither be created nor destroyed during a chemical reaction but can be transferred from one form to another.

Thus, for every balanced chemical equation, total mass of reactants must equal to the total mass of the product obtained.

With the above information, we can detertmine the mass of the products obtained as follow:

2NaHCO₃ → Na₂CO₃ + H₂O + CO₂

Mass of reactant = Mass of product

Mass of NaHCO₃ = Mass of (Na₂CO₃ + H₂O + CO₂)

25.00 g = 25.00 g

Thus, the mass of the products is 25.00 g

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The final equilibrium temperature of the mixture of lead, silver, and water is 24.65°C. The result is obtained by using the Black's Principle.

The Black's Principle states that heat released by a higher-temperature object is equal to the heat absorbed by a lower-temperature object. It can be expressed as

Q release = Q absorbs

Where

The mass of lead is 125 g at 85°C, the mass of silver is 320 g at 34°C, and the mass of water is 0.5 kg at 22°C. All of them are mixed, so that the temperature of the lead and silver will fall and otherwise the temperature of water will rise.

The equation of the heat energy with the temperature change is

Q = m × c × ΔT

Where

The data shows that:

The equilibrium temperature is

Q release = Q absorbs

(m × c × ΔT)lead + (m × c × ΔT)silver = (m × c × ΔT)water

(0.125 × 128 × (85-T)) + (0.320 × 234 × (34-T)) = (0.500 × 4,186 × (T-22))

(16 × (85-T)) + (74.88 × (34-T)) = (2,100 × (T-22))

1,360 - 16T + 2,545.92 - 74.88T = 46,200 - 2,100T

2,190.88T = 50,105.92

T = 24.65°C

Hence, the final equilibrium temperature of the mixture is 24.65°C.

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Valence electrons in CO₂ = 16

Bonded electrons in CO₂ = 4 electrons of carbon and 2 electrons of each oxygen atom

Lone pairs of electrons in CO₂ = 2 l0ne pair of electrons on each oxygen atom

Single bonds in CO₂ = None

A Lewis structure, also known as, Lewis dot structure, electron dot structure, is a diagram showing the bonds between the atoms of a molecule and the lone pairs of electrons present within the molecule.

Carbon dioxide is a colorless, odorless, non-flammable gas produced when carbon is burned. The ratio of carbon to oxygen in the  CO₂ molecule is 1:2. Two double bonds join the carbon and oxygen atoms in the Lewis structure. There are two oxygen atoms at each end where they share electrons and form a bond with the central carbon atom. A Lewis structure diagram shows the number of valence electrons available for bond formation within an atom. You can also visualize the behavior of valence electrons in molecules and determine if lone pairs are present.

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An generally pro of HBr results in a molecule called halohydrin in this process. The oxygen carrier in the epoxide will be protonated by the hydrogen, and then the bromide ion will attack the more.

Stereochemistry is the study of a material's four structural elements. The location of the particle's electrons in 3 dimensions is the only structural distinction between the enantiomers known as cis and trans isomers. There may be differences in the physicochemical characteristics of these stereoisomers.

Chemists can determine the connections between several molecules consisting of the same atoms by using stereochemistry. They can also research how these linkages affect the physical and biological characteristics that molecules possess.

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The pH at the equivalence point will be 4.028

Volume of NaOCl = 20.00 ml

Volume of HCl = 28.30 ml

Molarity of HCl = 0.50 M

Ka = 3.0 × 10⁻⁸ (missing in question)

pH of solution at eq. point = ?

Write the chemical equation

    NaOCl + HCl → HOCl + NaCl

Initial concentration of reactants and products are as:

    NaOCl = 20 × M

    HCl = 28.3 × 0.50

    HOCl = 0

    NaCl = 0

Equivalence point concentration of reactants and products are as:

    NaOCl = 0

    HCl = 0

    HOCl = 28.3 × 0.5

    NaCl = 28.3 × 0.5

As NaCl is a neutral salt so we take the concentration of HOCl

    [HOCl] = 28.3 ml × 0.5 M / 48.3 ml (total volume)

    [HOCl] = 0.2929 M

Now calculate the pH

    pH = 1/2 [pKa - log C]

    pH = 1/2 [ (8 - log 3) - log 0.2929]

    pH = 4.028

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So an atom with a radius of 50 kilometers would be required for a nucleus that was 1 meter in size.

The nucleus is the center of the cell and contains the DNA and other structures that contain the genetic material (such as growth and metabolism). Inside the nucleus, tiny structures known as nucleoli are frequently seen. The gel-like structure within which nuclear components are hung is known as the cell nucleus.

When one look at a photograph of a cell, one of the parts that stands out the most is the nucleus. The nucleus, located at the center of the cell, is home to all of the chromosome, which are responsible for encoding the genetic material. The nuclear envelope, nucleolus, nuclear matrix, nucleosome, and nucleolus are some of the several structures that make up the nucleus.

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