the element argon has three stable isotopes, ar36, ar38, and ar40. ar36 has an isotopic mass of 35.968 u and an abundance of 0.34%. ar38 has an isotopic mass of 37.963 u and an abundance of 0.06%. ar40 has an isotopic mass of 39.962 u and an abundance of 99.60%. calculate the average atomic mass of argon.

Answer:

first u up side down under the root .

Answer:

Magnesium Nitrate is an ionic compound formed by:

Magnesium;Mg+2 (the cation) and Nitrate NO−3 (the poly-atomic anion).

In order for these two ions to bond, the charges must be equal and opposite. Therefore, it will take:

     two -1 nitrate ions to balance the one +2 magnesium ion.

C6H404(aq) + H2O(1) = C4H504+(aq) + OH"(aq) is the reaction of succinic acid (c6h4o4) with water

Given :-

pKa of succinic acid = 4.21

To find : equilibrium constant of reaction of succinic acid with water

Strategy :- first we find dissociation constants of weak acid with the help of formula and then we find equilibrium constant of reaction with the help of dissociation constant and Reaction .

Solution :-

Since we know

pKa = - log Ka

Therefore

Ka = 10-pKa  = 10-4.21 = 1.6218 ×103

Ka = 1.62 × 103

Reaction of succinic acid with water

C4H604 + H2 O ------ > C4H5O4- + H3O+

Kc of reaction will be

Kc = [ C4H5O4-] [ H3O+] / [ C4H6O4][H2 O]  

Here  let H2 O is  negligible

Kc = [ C4H5O4-] [ H3O+] / [ C4H6O4] ---------(1)

And

Ka  = [ C4H5O4-] [H3O]  / [ C4H6O4]

So it is same as Kc eq

Therefore

Kc = Ka = 1.62× 103 .

Succinic acid is often found in high levels in tumors or biofluids surrounding tumors. It is a weak acid with a pKa of is 4.21. What is the reaction of succinic acid (C6H404) with water? Rolevant Infoumotion. C6H404(aq) + H2O(1) CoH304 (aq) + OH(aq) C6H404(aq) + H2O(1) CoH304" (aq) + H30+(aq) C6H404(aq) + H2O(1) = C4H504+(aq) + OH"(aq) C6H404(aq) + H20(1) CoH504+(aq) + H30+(aq)

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Quantum mechanics is the study of atoms and incredibly tiny particles that are even smaller.

In quantum mechanics, another branch of physics, atomic and subatomic particles are investigated. The primary field of science that deals with the study of atoms and molecules is chemistry. By utilizing their knowledge of atoms, chemists create molecules that resemble drugs. A distinction is established between atomic physics, which studies the atom as a system made up of a nucleus and electrons, and nuclear physics, which explores nuclear reactions and special properties of atomic nuclei. Three subatomic particles make up matter: protons, neutrons, and electrons. The only subatomic particles that have electrical charges are protons and electrons, with protons having a positive charge and electrons having a negative charge.

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Answer:

iodine

Explanation:

The reaction that take place when active metals react with acids are:

Active metals are those metals which are very reactive and are found high above hydrogen in the activity series of metals.

The reactivity of metals is determined by the ability of the meta to give up electrons to form positive ions called cations.

Therefore, active metals are those metals that readily give up their electrons to form cations.

The active metals are found in the group 1A and 2A and 3A of the periodic table.

The active metals include; sodium, potassium, calcium, aluminum, magnesium, zinc etc.

The active metals react with dilute acids to displace hydrogen, resulting in the evolution of hydrogen gas.

Considering the given equations, the reactions of the active metals are:

Mg (s) + 2HCl (aq) → MgCl₂ (aq) + H₂ (g)

Zn (s) + 2 HCl (aq) → ZnCl₂ (aq) + H₂ (g)

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The particles of the solution is smaller than that of the colloids and suspension.

Solution has the smallest particle, and the particles of solution are uniformly distributed and too small in which light can difficultly scatter. Colloids have larger particles than the solution and colloids can scatter light but do not settle out. Suspensions have the largest particles from both solution and colloids. Particles in solution is tinier than that of colloids. The particles in solution can not be seen in microscope, while the particles in colloids can be seen with the microscope.

So we can conclude that: The particles of the solution is smaller than that of the colloids and suspension.

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Answer:

thermal shock

Explanation:

the temperatures inside the glass jar should have continued to increase over time. Internal stresses due to uneven heating. This is also known as “thermal shock”.

In general, the thicker the glass, the more prone it will be to breaking due to the immediate differences in temperature across the thickness of glass.

Borosilicate glass is more tolerant of this, as it has a higher elasticity than standard silicon glass.

You may also note that laboratory test tubes and flasks are made with thinner walls, and of borosilicate glass, when designated for heating.

The final gas volume, O, could be either larger or smaller than 2.96 L, depending on the final pressure and temperature. While heating the gas to a higher temperature, O could be larger than 2.96 L, but it could also be smaller.

The final gas volume, O, could be either larger or smaller than 2.96 L, depending on the final pressure and temperature. To understand why, we can look at the ideal gas law equation, PV = nRT. In this equation, P represents pressure, V represents volume, n represents the number of moles of gas, R is the gas constant, and T represents temperature.

Let's analyze the situation given in the question. We have a sample of xenon gas at a temperature of 306 K and a pressure of 0.847 atm, occupying a volume of 2.96 L. Now, if the pressure of the gas is decreased, while at the same time it is heated to a higher temperature, the final gas volume, O, could be either larger or smaller than 2.96 L.

If we decrease the pressure while keeping the temperature constant, according to Boyle's law, the volume of the gas will increase. So, in this case, O would be larger than 2.96 L. However, if we simultaneously increase the temperature while decreasing the pressure, the situation becomes more complex. The combined effect of the pressure decrease and temperature increase could lead to different outcomes for the final volume.

For example, if the pressure decrease is significant and the temperature increase is relatively small, the volume may still increase, resulting in O being larger than 2.96 L. On the other hand, if the pressure decrease is small and the temperature increase is significant, the volume may actually decrease, resulting in O being smaller than 2.96 L.

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The side chain of amino acid can form covalent bonds within a polypeptide that anchor the three dimensional structure is a. cysteine

Cysteine contains a sulfur-containing group called a thiol (-SH) in its side chain, which is capable of forming covalent bonds with other cysteine residues in the same protein chain or with other molecules such as metals. These covalent bonds are known as disulfide bonds, and they are crucial in stabilizing the three-dimensional structure of proteins.

Disulfide bonds can form between two cysteine residues in the same protein chain or between different protein chains. The formation of disulfide bonds between cysteine residues helps to stabilize the protein structure and prevent unfolding or denaturation. Therefore, cysteine is an important amino acid for the stability and function of proteins.

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By putting acid on the plastic and observe how it reacts, the chemical properties might be discovered.

Acids normally do not cause any reaction with plastics, and due to this reason plastic container are used to store acid.

Chemical properties are those properties that could observed when a substance undergoes chemical change. during chemical properties one substance changes to another substance.

If the atoms of a molecule are rearranged, the substance is said to have undergone a chemical reaction. This would eventually result in the synthesis of a new chemical.

The forensic scientist is now interested in the plastic's chemical composition. reaction of acid and the plastic could be used to do this.

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Answer:

Explanation:d

Age, heat, and magnetic orientation are distinct concepts in different domains:

Age: Age refers to the length of time that has passed since a particular event or the duration of existence of an object or organism. In the context of living organisms, age typically refers to the number of years that have elapsed since birth or a specific milestone. Age can be used to measure the maturity, development, or lifespan of individuals or entities.

Heat: Heat is a form of energy associated with the motion of particles within a substance. It is commonly understood as the transfer of thermal energy between objects or systems that have different temperatures. Heat can cause changes in temperature, state, or phase of a substance. It is typically measured in units such as joules or calories.

Magnetic orientation: Magnetic orientation refers to the alignment or positioning of an object or material with respect to a magnetic field. Certain materials, such as magnets or ferromagnetic substances, can be influenced by magnetic fields and exhibit specific orientations. Magnetic orientation is often studied in the context of magnetism, magnetic materials, and applications such as compasses, where objects align themselves with the Earth's magnetic field.

These concepts are distinct and unrelated to each other. Age pertains to time, heat pertains to energy transfer, and magnetic orientation pertains to the alignment of objects in a magnetic field.

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The measure can be correctly completed with a quarter note.  This note gets one beat in the 4/4 time signature. The  is that it is important to understand time signatures and note values when completing a measure. A measure is a segment of music that is separated by bar lines.

It is also called a bar. In Western music, there are a few different time signatures. The most common is 4/4 time. The top number indicates how many beats are in each measure, while the bottom number indicates what type of note gets one beat. A quarter note gets one beat in 4/4 time.

It is also sometimes called a crotchet. The other answer choices, dotted eighth note, eighth note, and sixteenth note, have different lengths and do not fit within one beat in 4/4 time. Therefore, a quarter note is the correct choice to complete the measure correctly with a single note.  The measure can be completed correctly with a quarter note. In 4/4 time signature, a quarter note gets one beat.

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Answer:

Rb

Explanation:

Rb look closely

Answer:

Explanation:

Here, we want to know what happens to a solution that becomes more acidic

A lesser ph (1-7) indicates acidity with the acidity being higher as the number becomes smaller

What this means is that a solution with a pH of 3 is more acidic than a solution with a pH of 5

Thus, when the acidity increases, it is expected that the pH of the solution decreases (it becomes smaller in number)

Answer:

CO2

Explanation:

You have 3 C for 6 O, then the empirical will be 1 C for 2 O

=> CO2

Answer:

88.58 inches

Explanation:

You would just divide 225 by 2.54

Answer:

88.5827

Explanation:

Explanation:

Winter 4

Season when the northern hemisphere is tilted away from the sun.

Summer 2

Season when the northern hemisphere is tilted towards the sun.

Spring 1

Season when the northern hemisphere is neither tilted towards nor away from the sun; days getting longer and warmer.

Fall 3

Season in the northern hemisphere when the Earth is neither tilted towards nor away from the sun; days getting shorter and cooler.

In thin layer chromatography (TLC), the stationary phase is a thin, non-porous layer of a solid material and the mobile phase is a liquid. In column chromatography, the stationary phase is a solid material packed into a tube and the mobile phase is a liquid.

Thin layer chromatography (TLC) and column chromatography differ in their stationary and mobile phases. TLC and column chromatography differ in their stationary and mobile phases.

Both techniques can be used to identify compounds by comparing their retention times to those of known compounds. However, TLC is faster and more cost-effective than column chromatography, whereas column chromatography has higher resolution and can handle larger sample volumes.

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Answer:

There are approximately 5.55 moles

Explanation:

Answer: a)Complete ionic equation:

2NH₄⁺ + S²⁻ + Fe²⁺ + SO₄²⁻ → 2NH₄⁺ + SO₄²⁻ + FeS

Net ionic equation:

Fe²⁺ + S²⁻ → FeS

b) Complete ionic equation:

2Na⁺ + SO₃²⁻ + Ca²⁺ + 2Cl⁻ → 2Na⁺ + 2Cl⁻ + CaSO₃

Net ionic equation:

SO₃²⁻ + Ca²⁺ → CaSO₃

c) Complete ionic equation:

Cu²⁺ + SO₄²⁻ + Ba²⁺ + 2Cl⁻ → Cu²⁺ + 2Cl⁻ + BaSO₄

Net ionic equation:

Ba²⁺ + SO₄²⁻ → BaSO₄

Explanation:

(a) Balanced formula equation:

(NH₄)₂S + FeSO₄ → (NH₄)₂SO₄ + FeS

Complete ionic equation:

2NH₄⁺ + S²⁻ + Fe²⁺ + SO₄²⁻ → 2NH₄⁺ + SO₄²⁻ + FeS

Net ionic equation:

Fe²⁺ + S²⁻ → FeS

(b) Balanced formula equation:

Na₂SO₃ + CaCl₂ → NaCl + CaSO₃

Complete ionic equation:

2Na⁺ + SO₃²⁻ + Ca²⁺ + 2Cl⁻ → 2Na⁺ + 2Cl⁻ + CaSO₃

Net ionic equation:

SO₃²⁻ + Ca²⁺ → CaSO₃

(c) Balanced formula equation:

CuSO₄ + BaCl₂ → CuCl₂ + BaSO₄

Complete ionic equation:

Cu²⁺ + SO₄²⁻ + Ba²⁺ + 2Cl⁻ → Cu²⁺ + 2Cl⁻ + BaSO₄

Net ionic equation:

Ba²⁺ + SO₄²⁻ → BaSO₄

The balanced equation for the reaction of iron with water that results in the production of iron oxide and hydrogen gas is

3 Fe (s) + 4H₂O (g) → Fe₃O₄ (s) + 4H₂ (g)

Iron does not react directly with liquid water but react with water vapour. When the reaction happens, it results in the formation of a solid and a gas. The products of the reaction are Iron oxide and hydrogen. The equation of the reaction would be

Fe (s) + H₂O (g) → Fe₃O₄ (s) + H₂ (g)

Now, we need to balance the equation. On the right-hand side, we have 3 Fe, 4 O and 2 H. Similarly on the left-hand side there are 1 Fe, 1 O and 2 H.

To balance the equation, we add 3 to Fe, 4 to H₂0 and 4 to H₂.

As a result, the balanced chemical equation for the reaction would be

3 Fe (s) + 4H₂O (g) → Fe₃O₄ (s) + 4H₂ (g)

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Explanation:

\(v = vdm \times n\)

Vdm=22.4dm.

mole(n)=4 mol

therefore the total volume

\(v = 22.4 \times 4 \\ v = 89.6dm\)

Answer:

Electron.

Explanation:

Answer: Electron: A negatively charged particle found circling or orbiting an atomic nucleus. An electron, like a proton is a charged particle, although opposite in sign, but unlike a proton, an electron has negligible atomic mass. Electrons contribute no atomic mass units to the total atomic weight of an atom.

Glyphosphate, lindane, 2,4-d, chlordane are organic compound that have chlorine in common.

Organic compound are group of chemical substance that have carbon and hydrogen atoms in which the bonds are covalently linked together.

Therefore, Glyphosphate, lindane, 2,4-d, chlordane are organic compound that have chlorine in common and these chemicals are use as herbicides that is kill weeds, or to kill insects or pests because of chlorine present in it.

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