example of potassium salt​

The sodium-potassium pump system moves sodium and potassium ions against large concentration gradients.

The sodium-potassium pump (Na, K-ATPase) was located in 1957. It is important in shrinking the cardiac muscle, kidney function, and nerve signaling. It proceeds two potassium ions into the cell with high potassium levels and pumps three sodium ions out of the cell and into the extracellular fluid.

The procedure of moving sodium and potassium ions across the cell membrane is an agile transport process involving the hydrolysis of ATP to give the necessary energy.

So we can conclude that The sodium-potassium pump system moves sodium and potassium ions in case of large concentration gradients.

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Sodium potassium pump is referred to as an enzyme found in the membrane of all animal cells.

These are transmembrane proteins that actively move ions and/or solutes against a concentration or electrochemical gradient across biological membranes.

The Na⁺/K⁺-ATPase enzyme is active. For every ATP molecule that the pump uses, three sodium ions are exported and two potassium ions are imported and  plays an important role in contracting the cardiac muscle, kidney function, and nerve signaling.

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Answer:

the answer on the second part is c ((6 mol)(-393.5kJ/mol)+(6 mol)(-285.83 kJ/mol))-(-1,273.02 kJ/mol)

The sum of  enthalpy change of products will be equal to the sum of enthalpy change of reactants. Here, the change in enthalpy of formation of oxygen is equal to -467.16 kJ/mol.

What is formation enthalpy?

Enthalpy of fusion is the heat energy absorbed or released during the fusion of two reactants to form the products. The total heat energy in a system be a constant.

The formation enthalpies of both reactants and products are given here. The reaction and the enthalpy changes can be written as follows:

\(\rm 6CO_{2} + 6H_{2}O \rightarrow C_{6}H_{12}O_{6} + 6O_{2}\)

The number of moles must be multiplied with the enthalpies given then we can write it as:

(-1273.02 + 6 × ΔHf O₂)  =  6 (-393.5 + -285.83)kJ/mol

                                        = -4075.98 KJ/mol

                        ΔHf (O₂)  =    (-4075.98 - (-1273.02)) /6

                                        = -467.16 kJ/mol.

Hence, the enthalpy change of formation of oxygen in this reaction is -467.16 kJ/mol.

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The reason that methyl salicylate be much more volatile than salicylic acid is because:

Salicylic acid's COOH group is esterified with methanol in methyl salicylate (oil of wintergreen), whereas acetylsalicylic acid (aspirin) has acetic acid as the acid component of the ester and salicylic acid provides the phenolic OH group.

Note that Methyl salicylate, a volatile methyl ester of salicylic acid, can also diffuse into the atmosphere and aid in plant-plant communication.

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Explanation:

Refer to pic...........

.

The ability of a substance to reflect light is called Luster. So different substances have different Luster, the ability to reflect light.

Luster is one of the optical properties of materials. Usually metals are known for exhibiting luster. It is both a quantitative and qualitative measure. Luster is the property of reflecting all or some of the incident rays. Metals are lustrous, means they have a shiny surface. Some non-metals like diamonds is also lustrous in nature.

Another quantity that is used synonymous to luster is reflectance. It is the measurement of the light reflected compared to the incident rays falling on a surface.

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Answer:

Supplements and disinfecting chemicals

Explanation:

The major stages of water treatment are; coagulation, sedimentation, filtration and disinfection. Coagulation has to do with adding a coagulant such as potash alum which causes the impurities to clump together and form big particles called flocs. These settle down rapidly under gravity and the water is passed through a filter bed to remove fine particles. The water is now disinfected by the addition of chemicals such as chlorine. Supplements such as iodine and flourine may also be added to the water.

Contact process is operated at low pressure high temperature and V2O5 are conditions required for the contact process. The contact process is used to produce sulphuric acid from sulphur.

When the water leaves the waterworks, there has been the presence of chlorine as well as soluble substances. The reaction has been processed by utilizing Vanadium oxide as a catalyst, at low pressure and high temperature. Thus option D is correct.

Water has been made to work with the waterworks to make it fit for the drinking purpose. The process removes the access of contaminants from the water, by removing the toxins water has been made suitable for drinking purposes.

The disinfectants have been added to the water to chemically treat the water at waterworks. Chlorine has been the chemical widely used for disinfection purpose. Thus, when the water leaves the waterworks, there has been the presence of chlorine as well as soluble substances such as minerals that made water suitable for drinking.

The contact process has been the modern process used by the industries for the manufacturing of Sulfuric acid. The process has been a catalyze-mediated reaction in which there has been the formation of sulfur trioxide intermediate by the reaction of sulfur dioxide and oxygen. The reaction has been processed by the dissociation of sulfur trioxide to sulfuric acid on reacting with water.

The reaction has been processed by utilizing Vanadium oxide as a catalyst. The reaction has been processed at low pressure and high temperature. Thus option D is correct.

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Answer:

True

Explanation:

When it is poured onto skin, it preforms oxidation, releasing oxygen, which is a chemical change

The 4-methyl pentane-2-ol (\(C_6H_{14}O\)) is an alcohol compound with a methyl group attached to the fourth carbon atom and a hydroxyl group attached to the second carbon atom in a five-carbon chain.

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The high amount of moisture in the air traps heat causing extreme temperature differences.

A narrow range of temperatures allows organisms to survive. It varies between five degrees Celsius and thirty-five degrees Celsius. It best describes a desert climate with warm to hot temperatures year-round without a rainy season.

The desert environment is so dry that it supports only very sparse vegetation. There are few trees and shrubs or herbaceous plants that only form a very incomplete ground cover under normal climatic conditions. Deserts form when there is a lack of sunlight due to a lack of moisture. Evaporation is less due to the relatively low water content. There are also fewer clouds reflecting sunlight.

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Answer:

d

Explanation:

Explanation:

2CO2 + 3H2O + 4Br2

C = 2

O = 5

H = 6

Br =8

Answer:

1. 31.68 moles of water, H₂O

2. 14.81 moles of Cr

Explanation:

1. Determination of the number of mole of water, H₂O.

The balanced equation for the reaction is given below:

C₁₂H₂₂O₁₁ —> 12C + 11H₂O

From the balanced equation above,

1 mole of C₁₂H₂₂O₁₁ produced 12 moles of C and 11 moles of H₂O.

Next, we shall determine the number of mole C₁₂H₂₂O₁₁ needed to produce 34.55 moles of C. This can be obtained as follow:

From the balanced equation above,

1 mole of C₁₂H₂₂O₁₁ produced 12 moles of C.

Therefore, Xmol of C₁₂H₂₂O₁₁ will produce 34.55 moles of C i.e

Xmol of C₁₂H₂₂O₁₁ = 34.55 / 12

Xmol of C₁₂H₂₂O₁₁ = 2.88 moles

Thus, 2.88 moles of C₁₂H₂₂O₁₁ is needed.

Finally, we shall determine the number of mole of water, H₂O produced from the reaction. This can be obtained as follow:

From the balanced equation above,

1 mole of C₁₂H₂₂O₁₁ produced 11 moles of H₂O.

Therefore, 2.88 moles of C₁₂H₂₂O₁₁ will produce = 2.88 × 11 = 31.68 moles of H₂O.

Thus, 31.68 moles of water, H₂O were obtained from the reaction.

2. Determination of the number of mole of Cr needed.

The balanced equation for the reaction is given below:

Cr + H₂SO₄ —> CrSO₄ + H₂

From the balanced equation above,

1 mole of Cr reacted to produce 1 mole of CrSO₄.

Finally, we shall determine the number of mole of Cr needed to produce 14.81 moles of CrSO₄. This can be obtained as follow:

From the balanced equation above,

1 mole of Cr reacted to produce 1 mole of CrSO₄.

Therefore, 14.81 moles of Cr will also react to produce 14.81 moles of CrSO₄.

Thus, 14.81 moles of Cr is needed for the reaction.

Answer:

SiH

Explanation:

The symbol for Silicon is Si, and the symbol for Hydrogen is H. There is no need for extra characters in the name.

The first tetrapods, which sprang from lobe-finned fishes around 400 million years ago during the Devonian Period, were tetrapods.

Three definitions of adaptability are connected. First, natural selection, a dynamic evolutionary process, adapts organisms to their environments, improving their evolutionary fitness. Second, it is a state that the populace attained as a result of that process.

Transitional "fishapods," having both basic, fish-like characteristics and adaptations for semi-aquatic existence, first emerge in the fossil record during the late Devonian era, beginning around 375 million years ago. These creatures nevertheless weren't true tetrapods despite having stronger limbs with distinct fingers.

A physical or behavioral characteristic of an animal that enhances its ability to survive in its environment is known as an adaptation. To put it another way, an adaptation is something a person does or has on them that makes it easier for them to locate food, water, mates, and shelter.

Thus, the first tetrapods, which sprang from lobe-finned fishes around 400 million years ago during the Devonian Period, were tetrapods.

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Answer:

brown and silver

Explanation:

i'm not sure, so sorryyy!

Answer:  Explanation:

Atom means the smallest possible amount of matter which still retains its identity as a chemical element, now known to consist of a nucleus surrounded by electrons.

Iron means a common, inexpensive metal, often black in color, that rusts, is attracted by magnets, and is used in making steel.

Answer: Atoms are neutrally charged; they contain the same number of protons as electrons. By definition, an ion is an electrically charged particle produced by either removing electrons from a neutral atom to give a positive ion or adding electrons to a neutral atom to give a negative ion.

0.50 mol SiO₂

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Step 1: Define

30 g SiO₂ (sand)

Step 2: Identify Conversions

Molar Mass of Si - 28.09 g/mol

Molar Mass of O - 16.00 g/mol

Molar Mass of SiO₂ - 28.09 + 2(16.00) = 60.09 g/mol

Step 3: Convert

Step 4: Check

Follow sig figs and round. We are given 2 sig figs.

0.499251 mol SiO₂ ≈ 0.50 mol SiO₂

Answer:

\(\boxed {\boxed {\sf About \ 0.5 \ moles \ of \ SiO_2}}\)

Explanation:

To convert from grams to moles, we must use the molar mass.

1. Molar Mass

Use the Periodic Table to find the masses of the individual elements (silicon and oxygen) in sand.

Examine the formula for sand: SiO₂. There is a subscript of 2 after oxygen, so there must be 2 oxygen atoms. Multiply oxygen's mass by 2 and add silicon's mass to find the molar mass of sand.

2. Calculate Moles

Use the molar mass as ratio.

\(\frac{60.083 \ g \ SiO_2}{1 \ mol \ SiO_2}\)

Multiply by the given number of grams (30)

\(30 \ g \ SiO_2 * \frac{60.083 \ g \ SiO_2}{1 \ mol \ SiO_2}\)

Flip the fraction so the grams of sand will cancel.

\(30 \ g \ SiO_2 *\frac{1 \ mol \ SiO_2}{60.083 \ g \ SiO_2}\)

\(30 *\frac{1 \ mol \ SiO_2}{60.083 }\)

\(\frac{30 \ mol \ SiO_2}{60.083 }\)

\(0.499309289 \ mol \ SiO_2\)

3. Round

The original measurement of grams has 1 signfiicant figure. We must round our answer to 1 sig fig.

For the answer we found, that is the tenth place. The 9 in the hundredth tells us to round the 4 to a 5.

\(\approx 0.5 \ mol \ SiO_2\)

There are about 0.5 moles of SiO₂ in 30 grams.

After perform the following operation and express the answer in scientific notation is 7.6×10¹⁰

What is scientific notation?
Scientific notation is a way to present extremely large or extremely small numbers in a more understandable way. We are aware that full numbers can go on forever, but we are unable to write such enormous figures on paper. Additionally, a simpler method of representation was required for the numbers that appear at the millions place after the decimal. This makes it challenging to represent a small number of integers in their enlarged form. We therefore employ scientific notations. Learn general form for numbers as well. In scientific notation, 100000000 can be written as 108, for instance. Exponent is positive in this case. Similar to 0.0000001, which has a negative exponent and is a very small number, 10-8 can be used to symbolise it.

=7.296×10²÷9.6×10⁻⁹
=7.296×10²/9.6×10⁻⁹
=0.76×10¹¹
=7.6×10¹⁰

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Answer:

C stay away from trees, water, and tall objects.

Explanation:

took the quiz and got it right :)

A person trapped outside during a thunderstorm should stay away from the following:

This is defined as a rain shower during which you hear thunder with a corresponding lightning.

It is best to avoid trees, water, and tall objects during thunderstorms to prevent accidents and death.

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The formula mass (molar mass) of sucrose (C12H24O8), a fat is 296 g/mol. Therefore, option C is correct.

Molecular weight M is a chemical compound's mass divided by its amount of substance measured in moles. MB = m/nB, where m is the total mass of a pure substance sample and nB is the amount of substance B given in moles.

An element's characteristic molar mass is simply its atomic mass in g/mol.  To calculate the molar mass of a compound with multiple atoms, add all the constituent atoms' atomic masses.

The molar mass of sucrose (C12H24O8)

= 12 × 12 + 1 × 24 + 16 × 8

= 144 + 24 + 128

= 296 g/mol

Thus, option C is correct.

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The hydrogenation process is a chemical reaction that involves adding hydrogen to vegetable oils, which are naturally liquid at room temperature. This process is typically carried out by food manufacturers to convert liquid oils into solid fats.

During hydrogenation, unsaturated fats present in vegetable oils are chemically modified. These unsaturated fats have double bonds in their molecular structure. The hydrogenation process aims to break some of these double bonds and add hydrogen atoms to the fatty acid molecules. The addition of hydrogen atoms to the unsaturated fatty acid chains changes their structure and causes them to straighten out. This straightening effect leads to the formation of a more solid or semi-solid fat. The degree of hydrogenation determines the final consistency of the fat. Fully hydrogenated fats are solid, while partially hydrogenated fats tend to be semi-solid or have a creamy texture.

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Answer:

Explanation:

a. CuO+ 2HCl⇒CuCl2+ H2O

b. \(n_{CuO}\)= \(\frac{4}{80}\)= 0,05 (mol)

⇒\(n_{CuCl2}\)= \(n_{CuO}\)=0,05 mol

⇒\(m_{CuCl2}\)= 0,05×135=6,75 (g)

c. \(n_{HCl}\)=2× \(n_{CuO}\)=0,1 (mol)

⇒\(m_{HCl}\)= 0,1×36,5= 3,65 (g)

⇒\(m_{dd HCl}\)= \(\frac{m_{HCl}}{10}\)×100=36,5 (g)

⇒ Nồng độ phần trăm dd sau phản ứng= Nồng độ % dd CuCl2=\(\frac{m_{CuCl2} }{m_{dd HCl+ m_{CuO} } }\)×100=\(\frac{6,75}{36,5+4}\) ×100≈ 16,67%

Answer:

1.8 is the answer

Explanation:

9/5 = 1.8

5 sleps = 10 quib

so

1 quib = 5/ 10 slep

1 quib = 1/2 slep

9 quib = 9/2 slep

9 quib = 4.5 slep

so it rounds upto 5 slep

Answer: A longer answer is as follows: Species naturally change their ranges over time, ... By Definition, an invasive species is a plant or an animal or even a pathogen ... Any references to empirical studies that support your thesis on ... part of a process we do not desire (because of its potential negative effect on ...

Explanation:

Answer:

Radical is a charged ion

the types are cation and anion.

cation is positively charged and anions are negatively charged

Explanation:

The synthesis of 1-methylcyclopentane-1-carbaldehyde achieved through the reaction of 1-methylcyclopentene with ozone, followed by reduction with dimethyl sulfide and oxidation with potassium permanganate.

The best reaction conditions for this synthesis include using ozone in the presence of a suitable solvent such as dichloromethane or tetrahydrofuran, and carrying out the reduction and oxidation steps under mild conditions and in the presence of suitable reagents such as dimethyl sulfide and potassium permanganate, respectively. Other factors such as temperature, pressure, and reaction time may also need to be optimized depending on the specific reaction conditions.

Search for the wedge and sprint bonds, which are often the ones suggesting a chiral centre, to identify the chiral middle. One crucial thing to keep in mind is that a carbon with a double bond cannot be a chiral centre since it no longer has four unique companies.

Chemistry term for a method of displaying the three-dimensional structure of a molecule that uses simple lines to indicate bonds inside the plane of the picture, wedge-shaped lines to represent links facing the viewer, and dashed lines to show bonds facing the viewer in the distance.

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A germinating seed is one from which a plant has started to grow. A non-germinating seed is usually dry, and a new plant has not yet emerged. The germinating corn seed consumed more oxygen than the non-germinating corn seed. This statement is true.  Therefore, option A is correct.

A dry seed starts to absorb water through its seed coat when it comes into touch with damp soil or growing medium. The seed swells and the seed coat splits open as it absorbs more water. Small shoots and roots make up the embryo inside the seed. First to appear from the seed is the root.

The prerequisites for seed germination include oxygen, water, temperature, and, only for particular seeds, light. The sprouting of seeds is impacted when one or more of these are missing. Similar internal elements that impact this process include seed viability, dormancy, and embryonic maturity.

Thus, option A is correct.

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