The activity series ranks metallic ions from most reactive to least reactive.
In addition to metallic ions, we should consider the halogens. The elements in the
halogen family are ranked from most active to least as we move down the column.
That means a halogen at the top of the column will replace the elements below
them on the periodic table but not the other way around.

Based on this information determine which reaction will not occur?

Gustatory receptors are touchy to dissolved chemical substances however insensitive to mild. this is due to receptor fields.

The receptive area of a somatic sensory neuron is the vicinity of the skin within which a tactile stimulus evokes a sensory response in the cellular or its axon

The receptive subject (RF) of a neuron refers to the attributes of a visual stimulus that generates a reaction in that cell, and commonly includes an outline of visual field area and desire for other precise capabilities, which includes desired orientation or course of visual stimuli.

For instance, the complete place that a watch can see is called the visual view, and the patch of the field of vision that any single neuron video display units is that cell's receptive subject.

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500 kJ of heat are created by burning 16.84 grams of ethanol. The standard enthalpy of combustion for ethanol is -1368 kj/mol at 298 k.

Alcohol or fuel: which is ethanol?

A renewable fuel known as "biomass" is used to create ethanol from diverse plant components. Ethanol, often in the form of E10 (10% ethanol, 90% gasoline), is added to more than 98% of gasoline sold in the US in order to oxygenate the fuel and lower air pollution.

Where can you find ethanol?

Corn is the most widely used ingredient in ethanol produced domestically. It can also be produced utilizing cellulosic feedstocks such crop waste and wood, however this is less common. The Midwest region of the United States has a concentration of ethanol facilities since maize production is nearby.

Briefing:

Given the following data:

Standard enthalpy of combustion of ethanol = −1368 kJ/mol.

Temperature = 298 K

By stoichiometry:

1 mole of ethanol = 1368 kJ of heat

X mole of ethanol = 500 kJ

Cross-multiplying, we have:

X = 0.3655 moles

Now, we can determine the mass of ethanol required:

Mass = 16.84 grams

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48.90% yield is produced in the given reaction

What is yield of a reaction?

The quantity of moles of a product created in relation to the amount of reactant consumed during a chemical reaction is measured in chemistry as yield, also known as reaction yield.

One of the most important aspects of organic and inorganic chemical synthesis that researchers must take into account is yield.  The terms "yield," "conversion," and "selectivity" are used in chemical reaction engineering to describe ratios of how much of a reactant was consumed (conversion), how much of the desired product was formed (yield), and how much of the undesired product was formed (selectivity), represented as X, Y, and S.

Hence, 48.90% yield is produced in the given reaction.

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The dense mixture of liquid and solid utilized to create the chromatography column uses stationary phase and mobile phase. Silica gel is the most widely used stationary phase for column chromatography.

For the separation of complicated combinations of amino acids, peptides, carbohydrates, steroids, purines, and a lengthy list of simple chemical compounds, paper chromatography has evolved into a common procedure. On paper, inorganic ions can also be easily separated. Thin-layer chromatography is compared.

A separation method used to separate soluble mixtures is chromatography. A mixture is mixed in a solvent and poured down a column that is filled with a solid substance in column chromatography.

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According to the forces of attraction, in the frozen yogurt  which is melted the  particles move faster and slide past each other in the melted yogurt.

Forces of attraction  is a force by which atoms in a molecule  combine. it is basically an attractive force in nature.  It can act between an ion  and an atom as well.It varies for different  states  of matter that is solids, liquids and gases.

The forces of attraction are maximum in solids as  the molecules present in solid are tightly held while it is minimum in gases  as the molecules are far apart . The forces of attraction in liquids is intermediate of solids and gases.

The physical properties such as melting point, boiling point, density  are all dependent on forces of attraction which exists in the substances.

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The concentration of the original hbr solution is 0.147m.

How do you make HBr solution?

Distillation of a solution of sodium bromide or potassium bromide with phosphoric acid or sulfuric acid yields HBr: KBr + H2SO4 KHSO4 + HBr Because it oxidises HBr to bromine, concentrated sulfuric acid is less effective: 2 HBr + H2SO4 + 2 H2O Br2 + SO2 + 2 H2O

2Hbr + sr(oh)₂ --> srbrc + 2h₂0

25ml     16.8 ml

xm         0.105 m

for complete neutralization

Moles of Hbr =2× moles of sr(oh)₂

xm × 25ml = 2 ×  16.8 ml ×  0.105 m

x = 0.147m

Hence 0.147m is a correct answer.

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The straight arrows in the structure c2h4 that represent binding bonding in ethene point to the -bond.

Bond are fixed-income products that reflect loans from investors to borrowers .  An bond can be compared to the an agreement outlining the terms of the loan and the associated payments between both the lender and borrower.

A strong sense of friendship, affection, or shared values which brings people together is referred to as a bond. We developed a very unique friendship as a result of the event. The tie that bound them was [+ between]. Synonyms include bind, link, tie, and union. Additional words for bond.

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The percent yield of HCl is 85.0%.

In chemistry, yield, also referred to as reaction yield, is a measure of the quantity of moles of a product formed in relation to the reactant consumed, obtained in a chemical reaction, usually expressed as a percentage.

%yield = (actual yield/theoretical yield) x 100

The presence of impurities lowers the actual yield, which lowers the percentage yield. The purity of the reactants influences the percentage yield. Highly pure reactants tend to increase actual yield and, as a result, percentage yield.

A percentage yield greater than 100 percent is only possible if the product is contaminated with impurities or if all of the solvent from the reaction mixture has not been dried off.

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Answer:

During freezing, the temperature of a substance remains constant while the particles in the liquid form a crystalline solid.

Explanation:

The volume required for titration of NaOH is 0.000837ml.

Given -M=94g

m=0.223g

V=0.353

To find the new volume consider following points -

Calculations-

[tex]MV=mv\\\\94V=0.223 *0.353\\\\V=\frac{0.223 *0.353}{94} ml\\\\V=0.000837ml[/tex]

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Answer:

[tex]1s^{2} 2s^{2} 2p^{6} 3s^{2}[/tex]

Magnesium will lose 2 electrons.

Explanation:

Looking at a periodic table, magnesium is in the third period and the second group. It would help to look up where atomic orbitals are on the periodic table, but basically, s orbitals are filled in the first two groups. Since magnesium is in the second group, it will just have filled a 3s orbital with two electrons.

Elements in groups 1A, 2A, and 3A especially like to lose electrons to gain stability. Elements want to have a filled valence (outer) orbital with 8 electrons (except for hydrogen and helium) like noble gases. As such, they will lose or gain electrons in the easiest way possible to get a filled valence orbital. Magnesium wants to have the electron configuration of the nearest noble gas, in this case neon, so it will lose 2 electrons to achieve this stability. It takes much less energy to lose 2 electrons than gain 6 to fill its valence orbital, so magnesium will go for the former.

True. When homogeneous Dirichlet boundary conditions are applied to an interval [a,b], any nonsingular second-order linear ordinary differential equation a(x)u" + 6(x) u' + c(u) u = f(x) is (a) self-adjoint.

Homogeneous often refers to having the same parts or components. Something that is uniform in nature or character throughout is said to be homogeneous. The term "homogeneous" can also apply to a variety of items that are fundamentally the same as one another or fall under the same category.

A homogeneous mixture has a consistent composition across the whole mixture. The salt water in the aforementioned example is homogeneous because the dissolved salt is evenly distributed across the whole salt water sample.

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The volume of a 0.425M NaOH solution that is needed to neutralize 80.0 ml of a 0.176M solution of sulfuric acid is 33.13mL.

The volume of a substance can be calculated using the following expression:

CaVa = CbVb

Where;

According to this question, 0.425M NaOH solution is needed to neutralize 80.0 ml of a 0.176M solution of sulfuric acid. The volume needed can be calculated as follows:

0.425 × Va = 80 × 0.176

0.425Va = 14.08

Va = 33.13mL

Therefore, 33.13mL is the volume of the solution.

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Answer:

C.

Explanation:

Both protons and neutrons are 1 amu while electrons are 1/2000 amu

It always takes specific quantity of energy to remove only 1 electron from an atom.

Electron is a stable sub atomic particle with a charge of negetive electricity found in all atoms and acting as the primary Carrier of electricity in solid.

Sol-This is shown by the equation where this is  the orbit of the electron around a proton is equal to the quantum. The quantities by energy level, times by wavelength. So this is this equation and then abruptly hypothesis in links quantities. Energy states with a standing wave function so as that the energy of the election on increases its orbit must also increase. And as it is considering the wavelength, we're assuming statnon is constant. It's not to the changing and two pies just by a constant.

As the energy or quantifies energy level of an electron increases the  its radius around the nucleus must increase. Also, if its energy level of the decreases, its radius must also decrease. So this is the hypothesis ties together quantities, energy levels and the relationship and its relationship by it with the size of the circumference of around it. A nucleus which is also to  the Electron.

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Arrhenius Model of acids and bases is applicable to nonaqueous substances.

Which of the following statements is FALSE?

A) Nonaqueous substances are subject to the Arrhenius Model of acids and bases.

B) The Bronsted-Lowry Model was created before the Arrhenius Model of acids and bases.

C) Bases without hydroxide ions can still use the Bronsted-Lowry Model.

D) Compared to the Arrhenius Model, the Bronsted-Lowry Model covers a greater spectrum of acid-base phenomena.

option A is correct

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The following isomers is expected to undergo an SN2 reaction most rapidly upon treatment with NaOH is primary alkyl halide.

The SN2 reaction is the bimolecular reaction. the primary alkyl halides undergoes SN2 reaction than the secondary alkyl halide and the tertiary alkyl halide. the reason is because of  the less steric hindrance experienced by the nucleophile that is approaching to word compound. the secondary and the tertiary alkyl halides are slower than the primary one. the secondary alkyl halide and the tertiary alkyl halide experienced more steric hindrance as compared to the primary alkyl halide.

Thus, the primary alkyl halide under goes more readily an SN2 reaction.

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Neon has more valence electrons than does core electrons. The core electrons of neon are 2 and valence electrons are 8.

10 electrons make up neon, with 2 in the outermost shell and 8 in the outermost shell (so eight valence electrons)

With a total of 10 electrons, neon is the tenth element. The initial two electrons in the electron configuration for neon will be in the 1s orbital. The following two electrons for Ne enter the 2s orbital since 1s can only hold two electrons. Six additional electrons will enter the 2p orbital. The Ne electron configuration will be 1s22s22p6 as a result.

Because there are eight electrons in the second energy level (2s22p6) Neon has a full outer shell and an octet. Therefore, it is a Nobel Gas.

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Answer: you have to add the atomic number and the protrons

Explanation:

sulphur2-

K1+
B2+
I1-

Br1-

Explanation:

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A sample of vitamin a, C20H30O, contains 4.0 x 1024 atoms of carbon. It represents 6.64 mol of vitamin.

A mole is defined as the quantity of a material that contains precisely the Avogadro number of the substance's "elementary entities."  

Every material has the same amount of atoms or other particles in a mole. The mole has the following relationship to an element's mass: One mole of carbon-12 atoms weighs 12 grams and has 6.02214076 x 10^23 atoms.The mole concept helps in putting quantitative data about what transpires in a chemical equation on a macroscopic scale.

Number of carbon atoms in the given sample = 4 x 10^24 atoms.

We know that 6.022 x 10^23 carbon atoms = 1 mole (avagardo constant)

So, moles in 4 x 10^24 carbon atoms will be = 4 x 10^24/ 6.022 x 10^23

      =  6.64 mol.

Therefore, no of moles present is 6.64 mol.

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Thermolysis, photolysis, and electrolysis are three different forms of breakdown reactions. A single source was cooked to yield two or more objects in each instance (decomposition).

Decomposition reactions happen when complex chemical entities split apart into smaller components. Decomposition reactions often demand energy input. For instance, the thermal breakdown of potassium hydroxide (KClO3) is a typical technique used during laboratories to generate oxygen gas.

Below is a typical illustration of a thermal breakdown reaction. Calcite breaks down into calcareous dioxide and atmospheric co2 when heated. The production of quick lime, a crucial component in numerous industries, uses this procedure.

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0.0329 grams of aluminum can form by passing 353 c through an electrolytic cell containing a molten aluminum salt

AL^3+ + 3A^-   = AL

3 moles of e- = 1 mole AL

3 faraday e- =  1 mole AL

3 * 96485  c = 1 mole AL

1 c = (1 / 3*96485)*27 g

353c = 353*27 / 3*96485 g

        = 0.0329 g of AL

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Answer:

The process of turning from liquid into vapor.

Explanation:

The number of moles of carbon dioxide produced by the reaction of 0.085 moles of oxygen is 0.1 moles.

Solution:

2C₈H₁₈ + 25O₂ → 16CO₂ + 18H₂O

25 moles of O₂ reacted to produce 16 moles of CO₂.

Therefore,

0.085 mole of O₂ will react to produce = [tex]\frac{0.085*16}{25}[/tex] = 0.1 mole of CO₂.

Thus, the number of moles of CO₂ produced from the reaction is 0.1 mole.

When liquid octane is burned in the air it reacts with oxygen gas to produce carbon dioxide gas and water vapor. When octane burns in the air it chemically reacts with oxygen gas to produce carbon dioxide and water.

Combustion reactions of hydrocarbons release thermal energy and are an example of exothermic reactions. Gasoline burns and reacts with oxygen in the atmosphere to produce light and heat, converting carbon-based molecules into carbon dioxide gas and water vapor.

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Answer:

-ATP -carbon -glycolysis -Electron -Transport -FADH -phosphates -dioxide -pyruvate -ADP -NADH -Synthase -Water -cytoplasm -Chain -mitochondria -Krebs -oxygen

Explanation:

348 kilojoules is the energy required to break single carbon-carbon bonds. hence for six carbon-carbon bond 348*6=2088 kilojoules.2088 kilojoules  is the bond enthalpy of six carbon-carbon bonds.

Bond dissociation energy refers to the amount of energy required to break one carbon -carbon bond. This Bond dissociation energy is known as Bond enthalpy.

518 kJ/mol is the Bond enthalpy of one carbon-carbon bond in benzene which means  518 kJ/mol energy is required to break one single c-c bond in benzene.

hence,  348 kilojoules is the energy required to break single carbon-carbon bonds. hence for six carbon-carbon bond 348*6=2088 kilojoules.2088 kilojoules  is the bond enthalpy of six carbon-carbon bonds.

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Answer:

The forces involved in a collision are equal in size and directed in the opposite direction, and they accelerate both objects. Each object accelerates equally in collisions with things of equal mass.

Explanation:

[tex]CaCl_{2}[/tex] is the substance that one would anticipate lowering water's freezing point the most.

This makes use of the freezing point depression theory. When dealing with this problem, we employ the equation shown below:

T = iKfm, which is rendered as follows in English:

Vant Hoff factor times molal freezing point depression constant * Solution molality equals the change in freezing point.

The quantity of molecules, not their composition, determines the freezing point depression because it is a colligative feature.

Now that we are certain that Kf and molality will remain constant, the Van't Hoff factor, also known as "i" is our sole remaining unknown.

The number of atoms that separate from each particular molecule is known as the Van't Hoff factor. The freezing point will be more depressed the greater the Van't Hoff factor.

NaCl will dissociate into Na+ and Cl-, therefore it has I = 2 CaCl2 will dissociate into Ca2+ and 2 Cl-, so it has I = 3. Sugar (C12H22O11) has I = 1.

Choice B is the appropriate response as a result.

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Partial bonding, for example, as part of a resonance hybrid, often results in structures with fractional bond orders.

What is resonance?

Resonance in chemistry, also known as mesomerism, is a means to describe bonding in specific molecules or polyatomic ions by fusing a number of contributing structures into a resonance hybrid according to valence bond theory.

Resonance structure identification guidelines:

Atoms are immobile. Electrons can only be moved in bonds or lone pairs (that are in p orbitals) The system's total fee must not change. A molecule's bonding structure needs to be preserved.

Therefore, Partial bonding, for example, as part of a resonance hybrid, often results in structures with fractional bond orders.

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Answer:

Cobalt;nitrite

Explanation: there is none that is the compound

Answer:

CoNO2 is an ionic compound and is composed of cobalt cation (having +2 valency) and nitrite anion.

Explanation:

The chemical formula of cobalt cation is Co2+ and the formula of nitrite ion is NO−2 . When writing the name of an ionic compound, the name of the cation is written first and then the name of the anion. So, the name of CoNO2 is Cobalt (II) Nitrite.