Nitrogen and oxygen can be separated from liquid air.State the name of this process.

Answer:

crome .comxbdbshshdhdgsvsgsvdhjsjfskkt

The correct option is D. Lactic acid is fashioned and irritates myocardial nerve fibers. while myocardial oxygen name for exceeds oxygen deliver, mobile metabolism modifications from cardio to anaerobic, and lactic acid accumulates, irritating myocardial nerve fibers, which causes aches.

Lactic acid is a shape of herbal acid this is produced naturally in the body within the direction of numerous metabolic strategies. It has the chemical additive C3H6O3 and is classified as an alpha-hydroxy acid. Lactic acid is used in numerous commercial enterprises and meal programs, consisting of the manufacturing of biodegradable plastics, detergents, and prescription drugs.

In chemistry, lactic acid is classified as a carboxylic acid because it includes a carboxyl organization (-COOH). it could exist in two paperwork: L-lactic acid and D-lactic acid, which may reflect pictures of every other. The L-shape is the most commonly discovered in nature and is the sort that is produced thru the body all through exercise.

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Answer:

The answer would have to be the 3rd option

Answer:

(C)  Planets have moons, have atmospheres, and are made of rock, gas, or ice.

Explanation:

I believe the answer would be C!

Answer:

the red arrow shows that the change in enthalpy is positive

From the energy diagram, it is clear that, the enthalpy of the reaction is positive and it is an endothermic reaction.

An endothermic reaction is a chemical reaction that absorbs heat from its surroundings, resulting in a decrease in temperature of the surroundings. In other words, energy is taken in by the reaction from the environment.

During an endothermic reaction, the reactants absorb energy in the form of heat, light, or electricity to break the bonds between their atoms and form new bonds to create products.

The amount of energy absorbed by the reactants is greater than the energy released by the products. This energy difference is usually expressed as the enthalpy change (∆H) of the reaction, which is positive for endothermic reactions.

Here, the energy of products is higher than that of reactants and hence option A is correct.

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Answer:

5.27

Explanation:

1) First, let's calculate the molar mass of NaCl and CoCl₂:

Atomic mass of:

Na - 22.99 g/mol

Cl - 35.45 g/mol

Co - 58.93 g/mol

So for NaCl:

22.99 + 35.45 = 58.44 g/mol

Molar mass of NaCl = 58.44 g/mol

For CoCl₂:

58.93 + (2x35.45) = 129.83 g/mol

Molar mass of CoCl₂: 129.83 g/mol

2) Now let's find out the number of moles of each sample. For this, we use the following equation:

moles = mass / molar mass

NaCl:

mole = 116.8 / 58.44

mole = 1.999 moles of NaCl

CoCl₂:

mole = 259.7 / 129.83

mole = 2.000 moles of CoCl₂

3) To find the amount of particles, we use the Avogadro's constant. Avogadro's constant is a constant of proportion between the amount of matter and the number of entities that are linked to that amount. These entities can be atoms, molecules, ions, electrons, protons, neutrons.

In this case, we have the same number of moles, so we will have the same number of particles for both NaCl and CoCl₂.

Answer:

increases

Explanation:

it turns out that an object increases as the square of it's speed.

Answer:

Explanation:

In all physical processes taking place in closed systems, the amount of change in kinetic energy is equal to the amount of change in potential energy. If the kinetic energy increases, the potential energy decreases, and vice-versa. this equation reveals that the kinetic energy of an object is directly proportional to the square of its speed. That means that for a twofold increase in speed, the kinetic energy will increase by a factor of four. so therfore stays the same as the object so it would speed up as well.

"Polar" and "ionic" materials will most likely dissolve in water.

The two classes of materials that will dissolve in water are "polar" and "ionic" materials. Polar materials, such as sugar or alcohol, have an uneven distribution of charges, which allows them to interact with water molecules and dissolve. Ionic materials, such as table salt (sodium chloride), consist of positive and negative ions that are attracted to the positive and negative poles of water molecules, leading to their dissolution in water.

In both cases, the ability of a substance to dissolve in water depends on the interactions between the water molecules and the molecules or ions of the substance. Water's polarity and its ability to form hydrogen bonds make it an excellent solvent for many polar and ionic substances.

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Answer:

Carbon atoms each form four strong bonds. The bonds are covalent (atoms share electrons). This gives graphite its characteristic properties such as high melting and boiling points, good electrical conductivity, and softness. Use as pencil 'lead', as a lubricant in oil, furnace linings, electrodes, neutron moderators in nuclear power stations.

Diamond atoms each form three strong covalent bonds in the same layer and one weak bond to an atom in another layer.  Diamonds have a high level of hardness, thermal conductivity, and optical dispersion. It is used for jewellery, oil-well drills, abrasives and cutting tools.

Explanation:

Structure of Graphite and Diamond (attached below):

Ionic compounds have ionic bonds and are well defined as substances that are able to conduct electricity and exist in a solid state. Thus, options b and d are correct.

Ionic compounds are defined as a substance that shows ionic bondings and is characterized by the presence of the electrostatic force that helds the ions of the compound.

The charged ions carry the electrical charge in the solution. The ionic compounds are generally present as solids that are due to the structure of the crystal lattice that contains an alternative negative and positive charge.

Therefore, options b and d. ionic compounds can conduct electricity is correct.

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Your question is incomplete, but most probably your full question was, From the following statements write those applicable to ionic compounds?

a) Usually do not dissolve in water.

b) Conduct electricity in the molten state and aqueous solution.

c) Generally not a conductor of electricity.

d) Exists in the solid state​

Answer:

C8H20P4F8

Explanation:

Molecular formula is based off a ratio of the molecular formula's molar mass divided by the empirical formula's molar mass.

The molar mass of the empirical formula C2H5PF2 is 98.02g. We find this by adding the molar masses of all elements in the formula, multiplied by their subscripts.

2(12.01) + 5(1.01) + 30.97 + 2(18.99) = 98.02

We then divide the molecular molar mass by the empirical molar mass.

392.16/98.02 = 4

This tells us that the molecular formula has 4 times the mass of the empirical formula. Because mass comes from the elements in the formula, we multiply all the subscripts by 4 to get the molecular formula.

2x4 = 8

5x4 = 20

1x4 = 4

2x4 = 8

So the molecular formula is C8H20P4F8

Neutralizing them: FALSE.

Acids hp in the digestion of proteins by ;

NEUTRALISING THEM: FALSE.

PARTIALLY DENATURATING THEM: TRUE beacuse acids denature proteins and make them to lose their activity

PREVENTING THEIR ABSORPTION: FALSE

CLEAVING PEPSINOGEN:: TRUE pepsinogen os cleaved and then converted into active pepsin, which converts proteins into peptones and peptides.

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18 electrons.

According to the question, we have that sulphur has 16 electrons and after bonding with magnesium acquired a 2-charge. The sulphur ion S2- shows that sulphur has gained 2electrons to become stable.

Amount of electron S2- have = 16 electron + 2electrons

Amount of electron S2- have = 18 electrons

Hence the number of electrons S2- ion have is 18 electrons.

The repeating peptide backbone units of proteins contain 3 atoms. By understanding the structure of the "backbone" for peptides and proteins.

The structure of a peptide may be written very simply without illustrating the entire amide synthesis step.

The N-H 2, CH, C double bond O; N-H 2, CH, C double bond O; etc. repeating units make up the peptide backbone.

Nothing more than the use of the amide synthesis process results in the creation of peptides. The amide bond in peptides is often formed in the same sequence that the amino acids are listed. An amino acid's amine end (N terminal) is always on the left and its acid end (C terminal) is always on the right. The diagram on the left illustrates how to write the reaction between glycine and alanine to create the dipeptide glyclalanine. A water molecule is created when hydrogens (red) on the amine and oxygen (red) from the acid combine. The amide bond is created by the joining of the carboxyl oxygen (green) with the amine nitrogen (green).

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The Moon is able to fully cover the Sun during a solar eclipse because of its current orbit. One million years from now, this will change because the Moon is slowly moving ____________ from the Earth.

\( \\ \)

The Moon is able to fully cover the Sun during a solar eclipse because of its current orbit. One million years from now, this will change because the Moon is slowly moving away from the Earth.

\(__________\)

Because the Moon passes between Earth and the Sun during a solar eclipse, the Sun is fully hidden. Even though the Moon is much smaller than the Sun, it may entirely obscure the Sun's light from Earth's perspective because it is just the appropriate distance away.

The moon is slowly moving away from earth as  due to the effect of gravity of moon on the earth.

The moon is moving away from the earth due to the effect of it's gravity on earth.Tides which rise in the ocean  cause a drag and thus slow down the spin rate of earth.

This results in loss of angular momentum  which is compensated by the moon speeding up and thus moving away  from the sun. Due  to the moon's gravitational pull  there is production of tidal forces due to which earth's surface bulge out and cause rotation of the earth to loose momentum.Earth's rotation cause this tidal bulge  to occur in  a position which is  slightly ahead of moon in it's orbit around the sun.

As the moon moves away the orbital speed increases and earth's rotation slows down .

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Electrolytes are inorganic substances that usually dissociate in water.

When certain substances dissolve in water, they can dissociate into ions. These substances are called electrolytes. Electrolytes are typically inorganic compounds that conduct electricity when dissolved in water. They include salts, acids, and bases. When an electrolyte dissolves in water, the positive and negative ions separate and become surrounded by water molecules. This dissociation allows the electrolyte solution to conduct electricity.

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Electrolytes are the type of inorganic substances that usually dissociate in water. The correct option is b.

Inorganic substances that dissociate in water are called electrolytes. Electrolytes are compounds that can conduct an electric current when dissolved or dissociated in water. They break down into ions, which are charged particles, when they come into contact with water.

When an electrolyte dissolves or dissociates in water, it forms positively charged ions (cations) and negatively charged ions (anions). These ions are free to move in the solution, allowing the solution to conduct electricity.

Examples of common electrolytes include salts (such as sodium chloride, NaCl), acids (such as hydrochloric acid, HCl), and bases (such as sodium hydroxide, NaOH). When these substances are dissolved in water, they dissociate into their constituent ions, resulting in the presence of charged particles in the solution.

On the other hand, non-electrolytes, such as carbohydrates, lipids, and organic compounds, do not dissociate into ions when dissolved in water. They do not conduct electricity because they do not form charged particles in solution.

Therefore, inorganic substances that dissociate in water and form ions, allowing the solution to conduct electricity, are known as electrolytes. Option b is the correct one.

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A formula unit of sodium hydrogen carbonate (NaHCO3) contains 27.25% sodium (Na). Percent by sodium mass is equal to (total sodium mass / formula weight) x 100.

(Total mass of the element in the formula / weight) * 100 calculates an element's percentage by mass and 143 grams of adipic acid (c6h10o4)

Step 1: NaHCO3 formula weight

Atomic weights of Na, H, C, and O

NaHCO3's chemical formula is Na+H+C+3O.

NaHCO3's formula weight is 22.9+1.01+12.01+3. (16)

NaHCO3 has a formula weight of 84.01 g.

Using the mass-percent formula in step two

(Total mass of sodium / formula weight) * 100 to calculate sodium percentage by mass.

% by mass of sodium is equal to (22.9)/84.01*100.

sodium mass as a percentage equals 27.25%

27.25% of a unit of sodium hydrogen carbonate (NaHCO3mass )'s is made up of sodium.

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The correct options are:1.

Conditional probability that the selected compound actually has an impurity is 0.74.2.

Conditional probability that the selected compound is actually free of an impurity is 0.0185.3.

Conditional probability that the selected roll is from Process I given that it is defective is 0.64.

Here, we need to find out the probability that a selected compound has an impurity given that the test indicates an impurity is present.

P(A) = probability that a compound has impurity = 0.15

P(B) = probability that the test indicates an impurity is present

= 0.15 x 0.9 + 0.85 x 0.05

= 0.14 + 0.0425

= 0.1825P

(B|A) = probability that the test indicates an impurity is present given that the compound has impurity = 0.9

Therefore, by Bayes' Theorem,

P(A|B) = P(B|A) * P(A) / P(B)

         = 0.9 * 0.15 / 0.1825

         = 0.7370

         ≈ 0.74

Conditional probability that the selected compound actually has an impurity is 0.74.10.

Here, we need to find out the probability that a selected compound is actually free of an impurity given that the test indicates an impurity is not present.

P(A) = probability that a compound has impurity = 0.15

P(B) = probability that the test indicates an impurity is not present = 0.85 x 0.95 + 0.15 x 0.1 = 0.8075

P(B|A) = probability that the test indicates an impurity is not present given that the compound has impurity

          = 0.1

Therefore, by Bayes' Theorem,

P(A|B) = P(B|A) * P(A) / P(B)

          = 0.1 * 0.15 / 0.8075

          = 0.0185

Conditional probability that the selected compound is actually free of an impurity is 0.0185.11.

Here, we need to find out the probability that the selected roll is from Process I given that it is defective.

Let A denote the event that a roll is from Process I and B denote the event that a roll is defective.

Then, we need to find out P(A|B).

P(A) = probability that a roll is from Process I = 0.6

P(B|A) = probability that a roll is defective given that it is from Process I = 0.03

P(B|A') = probability that a roll is defective given that it is from Process II = 0.01

P(A'|B) = probability that a roll is from Process II given that it is defective

Therefore, by Bayes' Theorem,

P(A|B) = P(B|A) * P(A) / [P(B|A) * P(A) + P(B|A') * P(A')]

= 0.03 * 0.6 / (0.03 * 0.6 + 0.01 * 0.4)

= 0.6429

≈ 0.64

Conditional probability that the selected roll is from Process I given that it is defective is 0.64.

Hence, the correct options are:1.

Conditional probability that the selected compound actually has an impurity is 0.74.2.

Conditional probability that the selected compound is actually free of an impurity is 0.0185.3.

Conditional probability that the selected roll is from Process I given that it is defective is 0.64.

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Yes, to determine the molar mass of an unknown solute from the freezing point depression the freezing points of both the pure solvent and the solution need to be measured.

The depression of the freezing point is a and it is given by the following formula,

ΔT f = T°f - T f

Here T°f is the freezing point of pure solvent

T f is the freezing point of the solution made by adding non-volatile solute to solvent

The freezing point depression is directly proportional to the molality of the solution

T(f) ∝ m

T(f)= K f x m

Here K f is the proportionality constant.

Hence, to determine the molar mass of an unknown solute from the freezing point depression the freezing points of both the pure solvent and the solution need to be measured.

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When water is lost, but electrolytes are retained, the first thing that happens is that moves water from the ICF to the ECF.

The fluid inside of cells, also called the cytoplasm or cytosol, makes up about 60% of the water in the human body, totaling about 7 gallons. Organelles like the nucleus, endoplasmic reticulum, mitochondria, lysosomes, and Golgi apparatus are suspended in and supported by the ICF. Also found in the ICF are cellular building blocks like sugars, proteins, carbohydrates, and lipids.

ECFs are any body fluids that are not inside cells. The two main components of ECF are plasma and interstitial fluid (IF). The balance consists of cerebrospinal fluid, lymph, the synovial fluid in the joints, pleural fluid in the pleural cavities (lungs), pericardial fluid around the heart, peritoneal fluid in the peritoneal cavity (abdomen), and the aqueous humor of the eye. In mammals, milk is also considered an extracellular fluid.

The ICF has higher amounts of potassium, phosphate, magnesium, and protein compared to the ECF. The plasma has high concentrations of sodium, chloride, and bicarbonate, but lower levels of protein as compared to the ICF. While water moves passively via osmosis, sodium and potassium ions move in and out of cells using active transport ion pumps. The pumps are powered by adenosine triphosphate (ATP) to provide the energy to move the ions against their concentration gradients (i.e. sodium moves out of the cell and potassium is pumped in) and maintain the gradients inside and outside the cell.

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Answer:

B.

Explanation:

The order of increasing intermolecular force strength is solid iodine < chlorine gas < liquid bromine. The correct option is option B.

The total force between two nearby molecules is known as the intermolecular force. A molecule's neighbors and any possible solute are affected by the forces created by the kinetic energy of its atoms and the small negative and positive electrical charges on various sections of the molecule.

The London dispersion forces, the dipole-dipole interaction, and the ion-dipole interaction are the three basic types of intermolecular forces. As a kind of dipole-dipole interaction, hydrogen bonding adds to the overall intermolecular force.  The order of increasing intermolecular force strength is solid iodine < chlorine gas < liquid bromine.

Therefore, the order of increasing intermolecular force strength is solid iodine < chlorine gas < liquid bromine. The correct option is option B.

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Peroxides species shows the correct charge of the oxide ion.

As predicted by the two partially filled outer orbitals, oxygen assumes a negative oxidation state in all of its molecules. The oxide ion O2 is produced when electron transport fills these orbitals. It is thought that each oxygen in peroxides (species that contain the ion O2 2) has a charge of 1.

The carbon and hydrogen atoms have a slight positive charge, while the oxygen atom has a slight negative charge.

There are six valence electrons in the atom of oxygen. The oxygen atom requires two additional electrons in order to complete its valence shell. Adding two more electrons gives the oxygen ion a charge of two because each electron has a single negative charge.

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If the iron bars were placed in thermal contact in an open system instead of an isolated system, it would be: C. The temperatures of both iron bars would increase as they absorb heat from the surroundings.

In a system that is open, heat can be transferred between the system and its surroundings. In this situation, the room is at a temperature of 25°C, which is colder than the iron bars.

The room is colder than the iron bars, so heat will move from the room into the bars and make them hotter. So, both iron bars would get hotter as they take in heat from their surroundings.

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f the length of one side of a square is 12.0 m, the perimeter of the square is 48.0 m

To calculate the perimeter of a square, you need to add up all four sides of the square. The formula for the perimeter of a square is P = 4s where s is the length of one side of the square.

Given that one side of the square is 12.0 m, we can plug this value into the formula to find the perimeter.

P = 4s = 4(12.0 m) = 48.0 m

So, the perimeter of the square is 48.0 m

Perimeter is the measure of the distance around the outside of a two-dimensional shape, such as a square, rectangle, triangle, or circle. It is the sum of the lengths of all the sides of the shape. It is used to measure the size or the extent of a shape and is usually measured in units such as meters, centimeters, inches, or feet.

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The empirical formula of the compound is CH₂O. This means that for every one carbon atom, there are two hydrogen atoms, and one oxygen atom.

To determine the empirical formula, we need to find the simplest ratio of atoms in the compound. We can assume we have 100 grams of the compound, which means we have 54.5 grams of carbon, 9.1 grams of hydrogen, and 36.1 grams of oxygen.

Next, we calculate the number of moles for each element by dividing the mass by their respective molar masses: carbon (12 g/mol), hydrogen (1 g/mol), and oxygen (16 g/mol).

Carbon: 54.5 g / 12 g/mol = 4.54 mol

Hydrogen: 9.1 g / 1 g/mol = 9.1 mol

Oxygen: 36.1 g / 16 g/mol = 2.26 mol

To obtain the simplest whole-number ratio, we divide the number of moles of each element by the smallest number of moles (2.26 mol in this case).

Carbon: 4.54 mol / 2.26 mol = 2

Hydrogen: 9.1 mol / 2.26 mol ≈ 4

Oxygen: 2.26 mol / 2.26 mol = 1

Thus, the empirical formula of the compound is CH₂O, indicating that it contains two carbon atoms, four hydrogen atoms, and one oxygen atom.

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Inertia and gravity combine to keep the Earth in its orbit around the Sun. Inertia is the tendency of an object to remain in motion or at rest unless acted upon by an external force.

Gravity is the force of attraction between two objects that have mass. The Sun's gravitational pull on the Earth creates a centripetal force that pulls the Earth towards the Sun. At the same time, the Earth's inertia is trying to keep it moving in a straight line. These two forces balance each other out, and as a result, the Earth orbits the Sun in an elliptical path. The amount of gravitational force between two objects depends on their masses and the distance between them. The larger the mass of the objects and the closer they are, the stronger the gravitational force. In the case of the Earth, the force of gravity exerted by the Sun is strong enough to overcome the Earth's inertia and keep it in its orbit.

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Answer:

The transformation is of chemical energy (use the ATP molecule as a resource) which is then transformed into mechanical energy (muscle contraction) and finally transformed into thermal energy (increase in body temperature, or sweating)

Explanation:

Energy is never lost, it is always transformed, that is why energy is yielding electronic movement and expressing itself in different ways, first as chemical energy, then as mechanical energy, and lastly as thermal energy.

It is important to clarify that the energy source of all this transformation is food and energy reserves.

Answer:

H2 & F2

Explanation:

A covalent bond is formed when an electron is shared between two atoms. The two electrons of the covalent bond are positioned between the nuclei of the both bonding atoms. The electron pair of the bond may be equidistant from the nucleus of the two atoms or nearer to the nucleus of one of the bonding atoms than the other depending on the relative electro negativities of the both bonding atoms.

For homonuclear covalent bonds, there is no electro negativity difference between the bonding atoms. A single line may be used to indicate the shared electron pair between the two atoms.

Hydrogen and fluorine form homonuclear covalent diatomic compounds in which only a single electron pair is shared between bonding atoms. A single covalent bond is found connecting the two bonding atoms, hence the answer.

Answer:

Reaction #4

Explanation:

Generally, combustion reactions produce water and carbon dioxide, and the fourth answer choice is the only one that produces both of these compounds. Therefore, the fourth answer choice is the only one that can be a combustion reaction.

Answer:

pH is not been modified. No changes.

Explanation:

Our buffer is made of acetic acid, a weak one and the salt from its conjugate base, sodium acetate.

NaC₂H₃O₂ → Na⁺   +  C₂H₃O₂⁻

The acetate anion can make hydrolisis in water to produce acetic acid again.

C₂H₃O₂⁻  + H₂O  ⇄  C₂H₃O₂H + OH⁻     Kb

KCl is neutral salt. When we dissociate it:

KCl → K⁺  +  Cl⁻

Both ions come from a strong base and a strong acid. They won't make hydrolisis in water because they are conjugate weak acid and base

K⁺ + H₂O ← KOH + H⁺

Cl⁻ + H₂O ← HCl + OH⁻

These reactions can't be possible.

That's why it doesn't occur anything in our buffer, this salt does not give OH⁻ or H⁺ to medium to modify pH