The pic to the right shows you several organs working together including ur lungs, bronchi and trachea (windpipe) this means this pictures shows you an ?

Ions can be made by single element or covalently bonded group of elements. The covalently bonded group of elements is called polyatomic ions or polyatomic atoms. Therefore,  the other ions that are not attracted to the electrodes form salt.

Any species that contain charge whether it is positive charge or negative charge is called ions. The example of polyatomic ions are sulfate, phosphate, nitrate etc.

Cation is the species that loose electron and attain positive charge while anion is a species which gain electron and attains negative charge so when anion and cation combine in fixed ration the the overall charge of the molecule is zero that is molecule is neutral, the charge over cation and anion is also called oxidation state.

Positive ions are attracted towards negative electrode and negative ions are attracted toward positive electrodes. the ions which are not attracted to either of the electrode, these form salt with the other ion remaining in the electrolyte.

Therefore,  the other ions that are not attracted to the electrodes form salt.

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The compound is called cis-3-bromocyclohexanecarboxylic acid. Out of the available possibilities, this is the best decision.

The most significant functional group in C=O is the carboxylic acids. Some carboxylic acids, such citric acid, lactic acid, or fumaric acid, are produced through fermentation; the majority of these types of carboxylic acids are used in the food sector. This class of organic molecules can be obtained through several methods.

Carboxylic acids play a significant role in organic chemistry and are used to create a variety of derivatives, including esters, acid anhydrides, acid chlorides, amides, etc. They are organic substances with one or more carboxyl groups in the molecules of their molecules.

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The electropositive ion that is least likely to get reduced is Zn²⁺ (option B).

Electropositivity in chemistry is tendency of an element to release electrons to form a chemical bond or positively charged cations.

Electropositivity is primarily exhibited by metallic elements, especially the alkali metals and the alkaline earth metals.

Electropositivity is the opposite of electronegativity, which is a measure of the tendency of an atom to gain electrons and form negatively charged anions. Therefore, highly electropositive elements have very low electronegativities and vice versa.

Based on the cations given in this question, zinc (Zn²⁺) is the most electropositive, hence, has the least tendency to be reduced i.e. gain electrons.

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The molarity of the KCl solution is 4.04 moles/ litre

Molarity (M), which is determined by dividing the solute's mass in moles by the volume of the solution in liters, is the most widely used unit to express solution concentration: liters of solution/moles of solute equals M. One liter of a solution with a 1.00 molar concentration (1.00 M) contains 1.00 moles of solute.

The amount of a substance in a specific volume of solution is known as its molarity (M). The number of moles of a solute per liter of a solution is known as molarity. The molar concentration of a solution is another name for molarity.

Molarity = no. of moles/ volume of solution

Volume of KCl solution given is 0.25 L

molarity = 1.01 / 0.25

molarity = 4.04 moles/ litre

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Answer:

Explanation:

Nitrogen-15: 7electrons, 7protons, 8neutrons.

Nitrogen-20: 7electrons, 7protons, 13neutrons.

Sulphur-23: 16electrons, 16protons, 7neutrons.

Sulphur-25: 16electrons, 16protons, 9neutrons.

Answer:

A

Explanation:

One mole or 239.2 g of PbO₂ or 239.2 g gives two moles or 606.5  of lead sulphate. Thus, 23.6 g of lead oxide will give 59.84 g of lead sulphate.

Lead oxide is an ionic compound formed by the ionic bonding between the transition metal lead and oxygen by losing two electrons from lead to oxygen. It reacts with sulphuric acid giving lead sulphate PbSO₄.

As per the given balanced reaction, one mole of lead oxide gives two moles of lead sulphate.

Molar mass of PbO₂ = 239.2 g/mol

Molar mass of  PbSO₄ = 303.27 g/mol

2 moles of  PbSO₄ = 2 × 303.27  = 606.54 g.

Thus, 239.2 g of lead oxide gives 606.54 g of PbSO₄. The mass of PbSO₄ produced from 23.6 g of lead oxide is:

= (23.6 × 606 .54 )/ 239.2 g

= 59.84 g.

Therefore, the mass of PbSO₄ produced from 23.6 g of PbO2 is 59.84 g.

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The student should take the average of the results from all four trials to obtain the highest level of accuracy.

Chemistry's definition of accuracy is how closely a measurement resembles the actual value.

Three categories of accuracy exist:

1) Point accuracy signifies that accuracy is present only at that scale point.

It provides no details regarding the instrument's accuracy.

2)Percentage of true value - The accuracy is assessed by identifying the instrument's accuracy and contrasting it with the true value that was measured.

3)Percentage of scale range – The accuracy is what determines the measurement's accuracy.

Up to 0.5 percent of instrument accuracy is disregarded. By taking multiple measurements and accounting for human error, measurement accuracy can be improved.

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A) Molar mass of AgBr,

MM = 1*MM(Ag) + 1*MM(Br)

= 1*107.9 + 1*79.9

= 187.8 g/mol

mass of AgBr = 0.45 g

mol of AgBr = (mass)/(molar mass)

= 0.45/1.878*10^2

= 2.396*10^-3 mol

B) According to balanced equation,

mol of Na2S2O3 formed = (2/1)* moles of AgBr

= (2/1)*2.396*10^-3

= 4.792*10^-3 mol

Answer: 4.79*10^-3 mol

B) Using: number of mol = M(Na2S2O3)*V(Na2S2O3)

4.792*10^-3 mol = 0.02 M * V

V = 0.240 L

V = 240 mL

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Answer:

Explanation:

it's 109.13 g Ag2S2O3 . i have it when i was in school :)

If you eat the whole package, you would be eating a total of 900 calories.

What is calorie?
Calories are a measure of energy. Two main meanings of "calorie" are frequently used due to historical factors. The amount of heat required to increase the temperature of one kilogramme of water by one degree Celsius was the original definition of the huge calorie, food calorie, as well as kilogramme calorie (or one kelvin). The amount of heat required to produce the same rise in one gramme of water was known as the small calorie or gramme calorie. As a result, 1000 small calories are equal to 1 large calorie. The term "calorie" and the symbol "cal" almost always refer to the large unit in food and nutrition science.

If you eat the whole package, you would be eating a total of 900 calories (3 servings x 300 calories per serving = 900 calories).

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Check the nails every day for the development of rust. Both the nails submerged in water should rust after three weeks, while the nail submerged in vinegar should rust after about one week.

Rust is a similar coating created on a metal other than iron by corrosion. It is a reddish brittle coating that forms on iron especially when chemically attacked by damp air and is constituted primarily of hydrated ferric oxide.

Rust is a result of the reaction of iron with both air and water. Rust is a powder that forms from the oxygen in the air. Rusting is the process of rust creation. Rust is a reddish-orange flaky material. The metal surface is where rusting is more prone to happen because it is an oxidation process.

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In the following question the number of protons and electrons before it

a)lose electron are proton number= 13 electron =13

b) after losing electrons proton number=10 electron =10

c)the type of ion it becomes is a cation as it has a positive charge on it

What is atomic number?

The number assigned to a chemical element according to its atomic number in the periodic system, which places the elements in ascending order of the number of protons in their nuclei.

In the first scenario before loses electrons the number of protons and electrons in the atom before loses electron is 13, as given atomic number is 13.In second scenario After it loses 3 electrons Number of elctrons in the atom is 10 and number of protons is 13, as protons are present in the nucleus.

Therefore the number of protons is same i.e. 13 within the atom and no. of electrons after losing 3 electrons is 10 and it becomes a cation.

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Answer:

The three isomers of trans-1, 2-dichlorocyclobutane are as follows: The stereoisomers are those compound which differs in configuration. The stereoisomer of trans-1, 2-dichlorocyclobutane is cis-1, 2-dichlorocyclobutane.

The water displacement method is a set of measurements used to calculate the volume of an irregularly shaped object. These objects are commonly known as irregularly shaped solids.

The displacement method (also known as the submersion or dunking method) can be used to accurately measure the volume of the human body and other irregularly shaped objects by measuring the volume of fluid displaced when the object is submerged.

Place your jewelry on a table or in your hand, and pour some white vinegar directly on the metal (a dropper can also be used). If the metal of the jewelry changes color, it is not pure gold; if it continues to shine, you have real gold in your hand.

Thus, The water displacement method is a set of measurements used to calculate the volume of an irregularly shaped object.

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Answer: 42.14 g

Explanation:      calcium nitrate -  [tex]Ca(NO_{3} )_{2}[/tex]

                   , the molar mass of calcium nitrate = 164 g

                   mass required =[tex]0.257*164[/tex]

                                               =[tex]42.14[/tex] g

The amount of copper deposited is 0.1778 grams.

The electrolysis reaction for CuSO₄ solution

Copper deposits will occur at the cathode. According to Faraday's law the number of moles of an electron

ne = It ÷ 96,500

ne = (0.450 × 1,200) ÷ 96,500

ne = 540 ÷ 96,500

ne = 5.6 × 10⁻³ mol

The ratio of the coefficients of each element is equal to the ratio of the number of moles.

ne : n Cu = 2 : 1

n Cu = ne ÷ 2

n Cu = (5.6 × 10⁻³) ÷ 2

n Cu = 2.8 × 10⁻³ mol

Calculate the amount of copper

The molar mass for copper = 63.5

m = n × molar mass

m = 2.8 × 10⁻³ × 63.5

m = 0.1778 grams

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1.56% would be the percentage of the original sample would be left after 108 days.

What is  a radioactive element?

Radioactive elements are composed of atoms with unstable nuclei and emit atomic radiation as part of the stabilization process. Emission of radiation transforms radioactive atoms into different chemical elements. This chemical element is either stable or highly radioactive, so it decays further. Since some elements in nuclei are unstable due to the presence of excess nuclear charge, these nuclei undergo radioactive decay to form stable nuclei. These elements are called radioactive elements.

The nuclear stability of the elements can be calculated from the n/p (neutron-proton ratio). Elements with atomic numbers up to Z=20 are stable and contain the same number of protons and neutrons. As the atomic number increases, the repulsion between protons increases, requiring more protons and neutrons. Therefore, the neutron-to-proton ratio of stable nuclei increases with increasing atomic number.

Therefore, 1.56% would be the percentage of the original sample would be left after 108 days.

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Answer:

B and D

Explanation:

Answer D, look like you're missing (g) which stands for gas

so answer B (which is aq) and answer D (which is g) are correct.

Grams and litters are not used in the chemical equations but used in calculation of the quantities of reactants and products.

1) Mole are there in 5. 0 g of methanol is 0.147 mol.

2) molecule of CuCO₃ would weigh 9. 0 g

3)  mole would 3. 0 g of cyclohexane  is 0.035 mol

4) 4. 00 mole of benzene weigh is 312.44 g

5) mass of 1000 atom of calcium is 40000 u.

1)  Moles are there in 5. 0 g of methanol is CH₃OH :

molar mass of CH₃OH = 34 g / mol

moles of CH₃OH = mass / molar mass

                            = 5 / 34

                            = 0.147 mol

2) moles of CuCO₃  = mass / molar mass

                                 = 9 / 123.55

                                  = 0.0728 mol

molecules of CuCO₃  = 6.022 × 10²³ × 0.0728

                                    = 0.438 × 10²³ molecules

3) Mole would 3. 0 g of cyclohexane (C₆H₁₂) :

moles of C₆H₁₂ = mass / molar mass

                         = 3 / 84.16

                         = 0.035 mol

4) 4. 00 mole of benzene weigh :

moles = mass / molar mass

mass = moles × molar mass

mass = 4 × 78.11

mass = 312.44 g

5) mass of 1000 atom of calcium :

mass of 1 calcium atom = 40 u

maa of 1000 atom = 40000 u.

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The concentration of fluoroacetic acid in a solution is [tex]5.69*10^-^3M .[/tex]

What is dissociation of acids?

In an aqueous  solution, an acid dissociates into hydrogen ions (H+) and anions. The molecules of a strong acid dissociate, resulting in a high concentration of H+.

It is calculated by:

Ka = [tex]\frac{[A^-][H^+]}{[H^+]}[/tex]

The dissociation of HCl is given as follows:

HCl ⇄ [tex]H^+[/tex] + [tex]Cl^-[/tex]

The concentration of H+ ion = 0.00275 M.

So,

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

pH =  -log[tex][0.00275M][/tex]

pH = 2.56

According to question

pH of HCl = pH of fluoroacetic acid

The dissociation of fluoroacetic acid is given as follows:

[tex]FCH^2COOH[/tex] ⇄ [tex]FCH_2COO^-[/tex] + [tex]H^+[/tex]

Ka = [tex]\frac{[FCH^2COO^-][H^+]}{FCH^2COOH}[/tex]

pKa = -log [Ka]

2.59 = -log [Ka]

Ka = [tex]2.57*10^-^3[/tex]

According to ICE table:

            [tex]FCH^2COOH[/tex] ⇄ [tex]FCH_2COO^-[/tex] + [tex]H^+[/tex]

I                        C               0                       0

C                      -x               +x                     +x

E                     C-x               x                        x

According to the equation:

Ka = [tex]\frac{[FCH^2COO^-][H^+]}{FCH^2COOH}[/tex]

[tex]2.57*10^-^3[/tex] = [tex]\frac{x.x}{C-x}[/tex]

[tex]2.57*10^-^3[/tex] = [tex]\frac{x^2}{C-x}[/tex]

x = 0.00275M

[tex]2.57*10^-^3[/tex] = [tex]\frac{0.00275^2}{C-0.00275}[/tex]

Solving for C,

C = 0.00569M or  [tex]5.69*10^-^3M .[/tex]

The concentration of fluoroacetic acid in a solution is [tex]5.69*10^-^3M .[/tex]

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The relative atomic mass of the element is the average value of the hydrogen atom is 1.008 amu.

The mass of the one is the atomic mass. one amu is given as:

1 amu = 1.661 × 10⁻²⁷ kg

the hydrogen atom has the mass of = 1.6736 × 10⁻²⁴ g

The mass of the one twelfth carbon atom is given as :

= 1.661  × 10⁻²⁴ g

the relative atomic mass is given as follows :

Relative atomic mass = mass of the hydrogen atom/mass of 1/12 carbon atom

relative atomic mass = 1.6736 × 10⁻²⁴ g /  1.661  × 10⁻²⁴ g

Relative atomic mass = 1.008 amu

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The pH of the solution in which one normal adult dose aspirin is dissolved is 2.6 .

Given,

mass of aspirin = 640 mg = 0.640 g

volume of water = 6 ounces = 6 × 0.0295735 L = 0.177441 L

molar mass of aspirin = 180.16 g/mol

moles of aspirin = mass / molar mass = 0.00355 mol

The pH of the solution is as follows,

concentration of aspirin = moles of Aspirin / volume of water

= 0.00355 / 0.177441

= 0.021 M

Given that pKa of Aspirin = 3.5

pKa = -logKa

Therefore, Ka = 3.162 × 10⁻⁴

From the Ice table

3.162 × 10⁻⁴ = [x + H⁺]/[aspirin] = [x²]/[0.021 - x]

Given that the value of Ka is small so we will ignore -x

x² = 3.162 × 10⁻⁴ × 0.021

x = 2.576 × 10⁻³

Therefore,

[ H⁺ ] = 2.576 × 10⁻³

given that

pH = - Log [ H⁺ ]

     = - ( -3 + log 2.576 )

     = 2.58 ≈ 2.6

Hence we can conclude that The pH of the solution in which one normal adult dose aspirin is dissolved is 2.6 .

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Answer:

Intramolecular forces are the forces that hold atoms together within a molecule. Intermolecular forces are forces that exist between molecules.The stronger the intermolecular forces between solute molecule and solvent molecule, the greater the solubility of the solute in the solvent.

Intermolecular and intramolecular forces determine the solubility of solutes in water. As the polar solute dissolves in a polar solvent and nonpolar dissolves in nonpolar.

Intermolecular forces can be defined as the attractive forces and repulsive forces that develop between the molecules of a substance. These forces decide most of the chemical properties and physical properties of matter. The intermolecular forces between the molecules are known as Vander Waals forces.

Forces between the molecules themselves are known as intermolecular forces. The particles are held together by intermolecular forces while forces present within one molecule are known as intramolecular forces.

The intermolecular forces can be described as Dipole-Dipole Interactions, Ion-Dipole, Ion-Induced Dipole, Dipole-Induced Dipole Interactions, and Dispersion Forces.

Polar solute shows attractive intermolecular forces for polar solvents while nonpolar solute dissolves in nonpolar solvents. Intermolecular forces help dissolving solutes in water.

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And at the end we will calculate enthalpy by expressing it from the following equation:ΔmixH=ΔmixG+TΔmixS=−3.43⋅103J+(298K)(11.5JK−1)=−3.43⋅103J+3.43⋅103J=0J/mol Δmix​H​=Δmix​G+TΔmix S=−3.43⋅103J+(298K)(11.5JK−1)=−3.43⋅103J+3.43⋅103J=0J/mol​

ΔG is Gibbs free energy change. For an ideal solution. ΔHmix=0. ΔG<0 i.e., negative. ΔG=ΔH−TΔS.

The molar enthalpy HA+ B of a mixture of A + B can be obtained by combining the molar excess enthalpy H E with the molar enthalpies H A and HB of its pure components: HA + B = XA HA + XB HB + H E, (1) where x denotes mole fraction.

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The Avogadro' s number is 6.022×10²³

What is body centered cubic lattice?

The Bravis lattice of the same name serves as the basis for the BCC crystal structure, which has one atom per lattice point at each of the cube's four corners and in its centre. BCC's high proportion of nearest and next-nearest neighbours contributes to its tight proximity and excellent stability.

atomic mass of Ba = 137.327u

No. of atoms of Ba in a BCC unit cell = 2

Edge length of unit cell= 502pm =502ₓ10⁻¹⁰ cm

density =3.50g/cm³

ρ=ZM/N₀ₓV

3.50=2ₓ137.327/N₀ₓ(502ₓ10⁻¹⁰)³

=78.47257/1.265ₓ10⁻²²

N₀=6.02ₓ10²³

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The isomeric ethers with a formula of  C4H10O are three. Isomers do not  share similar chemical or physical properties.

Isomers are compounds that have exactly the same number of atoms, that is, they have exactly the same empirical formula, but differ from each other by the arrangement of atoms.  It is important to be able to recognize isomers because they have different chemical, physical and biological properties.

Structural isomers can be divided into : functional group isomers, chain isomers, and positional isomers.

In chemistry, isomers are molecules or polyatomic ions with identical molecular formulae but distinct arrangements of atoms in space.

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If our product includes succinimide, the IR spectra should show a prominent peak at around 1700 cm-1, suggesting an incomplete reaction.

There are several applications for these chemicals. The succinimides ethosuximide, phensuximide, and methsuximide are among the medications used as anticonvulsants. Succinimides are also utilized in a number of test procedures to create covalent connections between peptides or protein chains and polymers.

Succinimides inhibit voltage-dependent calcium leakage in thalamic neurons via acting on calcium T channels. Either the gastrointestinal system (vomiting, nausea, and abdominal discomfort) or the central nervous system are ethosuximide's side effects (lethargy, dizziness, and ataxia).

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