What was collected in the sample for chemical analysis? what was concluded from the results of this experiment?

Answer:

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Explanation:

Isotopes are atoms of the same element that have different numbers of neutrons but the same number of protons and electrons . The difference in the number of neutrons between the various isotopes of an element means that the various isotopes have different masses.

example:chlorine is an example of an isotope it has a proton number of 17 and a mass number of 35 in some cases they have a proton number of 17 and a mass number of 37 there is difference in the number of neutron to calculate this we do it this way.for the first one

mass number=proton+neutron

neutron=mass number-proton

neutron=35-17

neutron=18

for the second one

neutron=37-17

neutron=20

Process in which co2, is released as a by-product of oxidation-reduction reactions is known as krebs cycle.

In the mitochondrial matrix, acetyl-CoA is converted to carbon dioxide by the citric acid cycle, which also involves the reduction of coenzymes to produce ATP for the electron transport chain.

The acetyl group of acetyl-CoA is oxidized to make two molecules of CO2 in a succession of eight steps, while also producing one ATP. Additionally, reduced high-energy molecules like NADH and FADH2 are created.

Each glucose molecule produces two acetyl-CoA molecules so, the Krebs cycle must be completed twice to produce the four CO2, six NADH, two FADH2, and two ATPs.

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The number of atoms in 259 g of C₁₂H₂₁O₉ is 45 x 10²³ oxygen.

The molar mass of many compounds can be calculated by dividing the mass of the compound by the number of moles of the compound.

Given the molar mass is 309.29 g/mol

Given weight= 259g

number of moles = mass / molar mass

259g / 309.29g/mol =0.837mol

1 mol contains 6.022 x 10²³ molecules

0.837 mol contain 6.022 x 1023 x 0.837 = 5.0 x 10²³ molecules

1 molecule of C₁₂H₂₁O₉ contains 9 oxygen atoms

5.0 x 10²³ molecules of C₁₂H₂₁O₉ contain 9x 5 x 10²³ oxygen atoms.

=45 x 10²³ oxygen atoms

Thus, the number of atoms in 259 g of C₁₂H₂₁O₉ is 45 x 10²³ oxygen atoms

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Answer:

Explanation: your the best

The pH of the solution after dilution is 1.125.

HCl is hydrochloric acid. It is known by the name muriatic acid. It is among the strong acids. It has a pungent smell and is colorless. It has a molar mass of 36.4 g/mol. It's a common reagent used in pharmaceutical industries. It is also used in other industries such as textile, rubber, and metal.

The volume of HCl added to the solution = 3.0 ml

The molar concentration of HCl = 2.5 M

Let the molar concentration of the solution after dilution is x.

The volume of the diluted solution = 100 ml.

The molar concentration of the solution after dilution is,

[tex]M _{1} V _{2} = M_{2} V _{2} [/tex]

[tex]M_{2} = \frac{ M _{1} V _{2}}{V _{2} }[/tex]

[tex]M_{2} = \frac{2.5 \times 3}{100} [/tex]

[tex] = 0.075 \: M[/tex]

Thus, the molar concentration of the solution after dilution is 0.075 M.

The pH of the solution after the dilution is,

[tex][HCl] = [H ^{ + } ] = 0.075 \: M[/tex]

[tex]pH = - log [H ^{ + } ] [/tex]

[tex]pH = - log(0.075)[/tex]

[tex]pH = 1.125[/tex]

Therefore, the pH of the solution after dilution is 1.125.

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The immediate effect of hyperventilation on the CO₂ concentration in the blood is low levels of carbon dioxide in the blood.

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According to MO theory, when two atomic orbitals overlap, they combine to form an antibonding molecular orbitals that is lower energy and a bonding orbital that is higher energy. The electrons in a molecule are viewed as moving under the influence of the atomic nuclei throughout the entire molecule in molecular orbital theory rather than being allocated to specific chemical bonds between atoms.

The molecular orbitals that encircle and contain valence electrons between atoms in molecules are how quantum mechanics characterizes the spatial and energetic characteristics of electrons. By roughly representing the states of bound electrons—the molecular orbitals—as linear combinations of atomic orbitals, the molecular orbital theory revolutionized the study of chemical bonding (LCAO).

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The average kinetic energy of an object's particles increases with increasing temperature. The object's thermal energy grows as the average kinetic energy of its particles rises. As a result, an object's thermal energy rises as its temperature does.

The average kinetic energy of the particles in a substance is measured by temperature. The overall kinetic energy of the particles in a substance is measured by its thermal energy. The temperature and thermal energy of a substance increase with particle mobility. Temperature and thermal energy are strongly connected. Both reflect the motional kinetic energy of matter particles. Thermal energy is the total kinetic energy of matter particles, whereas temperature is the average kinetic energy of matter particles.

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Elements that would share similar properties are c) Cl and Br.

Elements chlorine (Cl) and bromine (Br) are both halogen elements.

In VIIA or group 17 (halogen elements) there are six elements: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At) and tennessine (Ts).

They have high electronegativity because they have seven valence electrons in their outermost energy level, so they can gain an electron to have the octet rule.

Electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

Chemical properties of these elements are similar, because they have the same number of valence electrons.

a) Nitrogen(N) and fluorine (F) are not in the same group of Periodic table of elements, so they have different properties.

b) Boron (N) and Si (silicon) are not in the same group of Periodic table.

d) Bromine and Kr (krypton) are different, because krypton is a noble gas.

e) Lithium (Li) and beryllium (Be) are not in the same group of Periodic table.

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Answer:

boiling point and melting point.

Disulfide bond forms when the sulfur atoms in two adjacent protein chains are joined together.

When the sulfur atoms in two adjacent protein chains come together, strong chemical side bonds form. Weak physical side bonds are caused by the attraction of opposite electrical charges. Polypeptide chains that are coiled. Chemical bonds that connect amino acids end to end in long chains.

These peptide subunits can form complex structures by bonding with other peptides. Chemical bonds of various types hold proteins together and bind them to other molecules. Examine the chemical bonds that are responsible for protein structure. A protein's primary structure is made up of amino acids linked together in a chain.

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The pH of the solution is 6.07.

pKa = 6.86; the acid equilibrium constant

c(H₂PO₄⁻) = 0.422 mM; concentration of the acid

c(HPO₄²⁻) = 0.068 mM; concentration of the salt

Henderson–Hasselbalch equation for the buffer solution:

pH = pKa + log(c(HPO₄²⁻)/c(H₂PO₄⁻))

pH = 6.86+ log (0.068 mM/0.422 mM).

pH = 6.86 + log0.161.

pH = 6.86 - 0.79

pH = 6.07; potential of hydrogen

pH (potential of hydrogen) is a numeric scale used to specify the acidity or basicity an aqueous solution.

When pH is less than seven (pH<7), solution is acidic..

When is equal seven (pH = 7), solution is neutral.

When pH is greater than seven (pH > 7), solution is basic.

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The purpose of washing the organic layer with saturated sodium chloride is to remove any of the unreacted benzoic acid

One of the most prevalent minerals on Earth is sodium chloride (NaCl), also known as salt. It is a crucial nutrient for many animals and plants. Seawater and subterranean rock formations are also naturally sources of sodium chloride.

In order to keep patients from becoming dehydrated, sodium chloride, a vital nutrient, is utilized in healthcare. It is employed as a spice to boost flavor and as a food preservative. Additionally, sodium chloride is employed in manufacturing to create polymers and other goods. Additionally, it is employed to de-ice sidewalks and highways.

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Answer:

It will cost $35.5602

Explanation:

$2.459 /6.5 (mpg) = 0.3783 (cents per mile)

$0.3783 (cost per mile) * 94 (total miles) = $35.5602 total

There are 94,608,000 seconds using conversion factor in 3 years.

First, let's calculate the number of seconds in 1 year, and then multiply it by 3 to get the total number of seconds in 3 years.

Conversion factors:

1 year = 365 days

1 day = 24 hours

1 hour = 60 minutes

1 minute = 60 seconds

Step 1: Calculate the number of seconds in 1 year.

[tex]\[\text{1 year} = 365 \text{ days} \times \left(24 \text{ hours/1 day}\right) \times \left(60 \text{ minutes/1 hour}\right) \times \left(60 \text{ seconds/1 minute}\right)[/tex]

Step 2: Calculate the number of seconds in 3 years.

[tex]\[\text{3 years} = 3 \times \left(365 \text{ days} \times \left(24 \text{ hours/1 day}\right) \times \left(60 \text{ minutes/1 hour}\right) \times \left(60 \text{ seconds/1 minute}\right)\right)\][/tex]

Now, let's perform the calculations:

1 year = 365 * 24 * 60 * 60 seconds

          = 31,536,000 seconds

3 years = 3 *31,536,000

            = 94,608,000 seconds

So, there are 94,608,000 seconds in 3 years.

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The mass defect of the oxygen nucleus is 16 8o 816o. the mass of neutral 16 8o 816o is equal to 15.994914 atomic mass units

8(1.008665)+8(1.007825)

=16.13192

16.13192-15.994914

=.13701 amu

The atomic nucleus is a small, dense region made up of protons and neutrons at the center of an atom, discovered by Ernest Rutherford in 1911, based on Geiger-Marsden's gold leaf experiment in 1909. After the discovery of the neutron in 1932, models of the nucleus composed of protons and neutrons were rapidly developed by Dmitri Ivanenko[1] and Werner Heisenberg. I was.

The cell nucleus carries genes, structures that control and regulate cell activity (such as growth and metabolism) and contain genetic information. Nucleoli are small bodies commonly found within the nucleus. The nucleoplasm is the gel-like matrix in which the core components are suspended.

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Acetic acid are in 1.52 ml if the concentration of the solution is 1.23 m 0.031  mole are present.

Here mass of acetic acid is 60g/mol and here given mole is 1.52 ml then

1.52/60= 0.025 and also here  concentration are given then concentration=n/V so, n=C×V= 1.23 × 0.025=0.03mole

So in 1.52 ml 0.03mole are seen

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The compound with the most exothermic lattice energy in each of the following pairs of ionic substances is Ca3N2.

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Bam's solution, 5.42 g of CsCl mixed with 35.31 ml of H2O, has a concentration of 15.3882 g CsCl/100 g H2O.

Concentration, in chemistry, is defined as the amount of solute in a particular amount of solvent or solution. Some of the most common ways to express concentration includes molarity, mass-to-mass and mass-to-volume.

To solve for the concentration of Bam's solution in g solute/100 g solvent, solve for the mass of the solvent first.

To solve for the mass of the solvent, use the density and volume:

mass solvent = density x volume

mass solvent = 0.9975 g/ml x 35.31 ml

mass solvent = 35.221725 g

Solving for the concentration of Bam's solution in g solute/100 g solvent, where the mass of the solute CsCl is 5.42 g:

concentration = mass solute/ 100 g solvent

concentration = 5.42 g/ (35.221725/100)

concentration = 15.38822985

concentration = 15.3882 g CsCl/100 g H2O

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OCFCs were found in the atmosphere at high levels.

Ozone absorbs the maximum of the ultraviolet radiation from the sun. faraway sensing is the technology of obtaining statistics about gadgets or regions from a distance, usually from aircraft or satellites. A Lidar mild Detection and the ranging image were created with data accrued by NOAA's country-wide Geodetic Survey. In 1985 Jonathan Shanklin turned into a junior researcher at BAS while he determined a hole in the invisible defense that protects us from solar radiation.

The ozone layer, which lies high within the ecosystem, shields us from harmful ultraviolet UV rays that come from the sun. Human activities successfully punched a hollow in it, through the use of gases like chlorofluorocarbons CFCs in spray cans and refrigerants, which wreck down ozone molecules in the top environment. Depletion of the ozone layer has outcomes on humans, animals, and plant life. This is typically a consequence of higher UV degrees achieving us on earth. The chlorofluorocarbons act like ultraviolet radiation inflicting a big amount of ozone to be produced.

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Answer:

Plank length

Explanation:

The smallest possible size for anything in the universe is the Planck Length, which is 1.6 x10-35 m across.

For a polymerization reaction with a termination step, what is the shortest material there in highest concentration is monomer.

A polymer is a large single chain-like molecule in which the repeating units derived from small molecules called monomers are bound together.  process by which monomers are transformed into a polymer is called polymerization. it helps to produce new chemicals like glycogen, cellulose, fatty acids etc. the termination step involves the reaction of a polymer chain radical with another free radical. These three steps constitute the normal step-growth polymerization process. the polymer concentration is associated with solution viscosity, which increases with the increase of the polymer concentration and then leads to a larger fiber diameter. if concentration is too low, continuous polymer fibers cannot be achieved.

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Secondary pollutants are produced in the air as a part of photochemical smog resulting from a chemical reaction in the presence of sunlight.

The secondary pollutants are the type of pollutants that are formed as a result of combination of two or more primary pollutants in the presence of sunlight.

Examples of secondary pollutants include the following:

Therefore, Secondary pollutants are produced in the air as a part of photochemical smog resulting from a chemical reaction in the presence of sunlight.

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2 electron bonds are shared between two carbon atoms when they are joined by a double bond.

An atom is a particle of matter that uniquely defines a chemical element. Atoms consist of a central nucleus surrounded by one or more negatively charged electrons. The nucleus is positively charged and contains one or more relatively heavy particles known as protons and neutrons.

Atoms are made up of two types of elementary particles: electrons and quarks. Electrons occupy the space surrounding the nucleus. Each electron has a charge of -1. Quarks form protons and neutrons, which form the nucleus. About 99% of the human body is made up of atoms of hydrogen, carbon, nitrogen, and oxygen. It also contains much smaller amounts of other elements necessary for life. November 6, 2015

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The correct way to complete this statement: when atoms combine to form compounds, they can share electrons.

An atom is a particle of matter that uniquely defines a chemical element. Atoms consist of a central nucleus surrounded by one or more negatively charged electrons. The nucleus is positively charged and contains one or more relatively heavy particles known as protons and neutrons.

Atoms formed shortly after the "Big Bang" billions of years ago. Atoms are made up of electrons that revolve around a nucleus containing protons and neutrons. The big bang created elementary particles such as electrons, protons, and neutrons. Things slowed down as the universe continued to expand and cool. It took 380,000 years for electrons to confine themselves in orbits around the nucleus to form the first atom. These are mainly helium and hydrogen, which are still the most common elements in the universe.

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The ancestors of modern cyanobacteria performed the oxygenic photosynthesis responsible for converting our anoxic planet to an oxygenated one.

Photosynthesis sustains life on Earth today by releasing oxygen into the atmosphere and providing energy for the food chain. The rise of oxygen-producing photosynthesis enabled the evolution of complex life forms such as animals and land plants about 2.4 billion years ago. An example of photosynthesis is how plants grow by converting sugars and energy from water, air, and sunlight into energy. (biology) The process by which plants and other photoautotrophic plants produce carbohydrates and oxygen from carbon dioxide, water, and light energy.

Photosynthesis is important for plants to produce the glucose needed to manufacture energy and cellular structures. Photosynthesis also produces the oxygen that both plants and animals need for cellular respiration to make ATP, a complex organic chemical that provides energy.

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The gas mileage is 39.986 miles/gallon.

A gallon is a unit of volume in both the US customary and imperial systems of measurement. The US gallon is defined as 231 cubic inches (3.785 liters).

1 km = 0.621371 mi;

1 L = 0.264172 gal

a gas mileage = 17 km/L

d(automobile) =  17 km x 0.621371 km/mi

d(automobile) = 10.563 mi; the distance

V(automobile) = 1 L x 0.264172 L/gal

V(automobile) = 0.264172 gal; the volume of an automobile

a gas mileage = d(automobile) ÷ V(automobile)

a gas mileage = 10.563 mi ÷ 0.264172 gal

a gas mileage = 39.986 mi/gal

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Because the excess chemical compound can be contaminated with other chemical compound and some reaction can be happen thats why returning chemicals to a reagent bottle introduce contaminants.

There is a chance for the chemicals which is taken out from the reagent bottle to be contaminated with other substances. the chemical property of some of these chemicals may change on contact with air. all these factors may affect the quality of further reactions that were supposed to be carried out by these unused reagents

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Answer:

Vinegar and baking soda

Explanation:

The others are physical changes, not chemical changes. This is because they do not change chemical properties or undergo a reaction.

However, when vinegar and baking soda are added together, it is a chemical change, because there is not only a reaction, but a change in its properties. Hopefully this helps!

The empirical formula of the metal iodide is Cr2I.

Mass of Chromium = 23.98

Molar Mass of Chromium = 51.9961

= 0.461 mol

Molar Mass of iodide = 126.9

= 199.6-23.88/126 = 1.394

The ratio between

Chromium and iodinei is1:2.So, the empirical formula is therefore Cr2I

Empirical formula of a chemical compound is the simplest whole number ratio of atoms present in a compound.[1] A simple example of this concept is that the empirical formula of sulfur monoxide, or SO, would simply be SO, as is the empirical formula of disulfur dioxide, S2O2. Thus, sulfur monoxide and disulfur dioxide, both compounds of sulfur and oxygen, have the same empirical formula. However, their molecular formulas, which express the number of atoms in each molecule of a chemical compound, are not the same.

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The density of a 167.4 g sample of magnesium having a volume of 96.32 ml is 1.737 g/cm3.

The mass per unit volume is known as density. A scalar quantity, density. It is represented by the letter D, and the Greek letter rho is used as the sign for density. Mass divided by volume is how density is computed.

Mass is a physical body's total amount of matter. Mass is defined as the sum of the moles of the material and the compound's molar mass.

Given the mass is 167.4 g

The volume is 96.32 ml

mass / volume

167.4  / 96.32 = 1.737

Thus, the density of a 167.4 g sample of magnesium is 1.737  g/cm3.

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