A chemical reaction can theoretically produce 137. 5 grams of product, but in actuality 112. 9 grams are produced. Which is the percent yield for this reaction?.

Answer:   Acid/base and precipitation reactions almost always are NOT redox reactions. For redox to have happened, the number of electrons that an element has must change (i.e. its oxidation state must change). ... But the hydrogen ion never "has" any electron throughout the process and remains in a +1 oxidation state.

Explanation:

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Acid-base reaction is not a redox reaction, since the oxidation number remains unchanged in acid-base reaction.  

An acid-base reaction is the chemical reaction that occur when acids and bases react together.

Redox reaction is a reaction that involves the transfer of electrons between the atoms, ions, or molecules.

Acid-base reactions involve the transfer of hydrogen ions between reactants. Redox reactions involve a change in oxidation number for one or more reactant elements.

Redox reactions involve a change in oxidation number for one or more reactant elements.

Acid-base reactions involve a transfer of a hydrogen ion instead of an electron and the transfer of an H+ ion leaves the oxidation numbers unaffected.

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Carboxylic acid functional group: -COOH

Amine functional group: -NH2

Ester functional group: -COO-

The carboxylic acid functional group is identified by the presence of the -COOH group. It consists of a carbonyl group (C=O) and a hydroxyl group (-OH) attached to the same carbon atom. The carbonyl group is denoted by the C=O bond, and the hydroxyl group is denoted by the -OH. This functional group is responsible for the acidic properties of carboxylic acids, as the hydroxyl group can easily donate a proton (H⁺) in solution. Carboxylic acids have a wide range of applications, including their use as preservatives, flavoring agents, and intermediates in organic synthesis.

The amine functional group is identified by the presence of the -NH₂ group. It consists of a nitrogen atom bonded to two hydrogen atoms (-NH₂). Amines can be classified as primary (1°), secondary (2°), or tertiary (3°) based on the number of carbon groups attached to the nitrogen atom. Amines are basic in nature, as they can accept a proton (H⁺) to form a positively charged ammonium ion. They play important roles in biological processes, such as acting as neurotransmitters, and are also used in the synthesis of various pharmaceuticals, dyes, and polymers.

The ester functional group is identified by the presence of the -COO⁻ group. It consists of a carbonyl group (C=O) attached to an oxygen atom, which is further bonded to a carbon atom (-COO⁻). The carbonyl group is denoted by the C=O bond, and the oxygen atom is denoted by the -O-. Esters are formed through the reaction between a carboxylic acid and an alcohol, resulting in the elimination of water. They are commonly used as solvents, flavoring agents, and fragrances. Esters also play a vital role in the formation of lipids, which are important components of biological membranes and energy storage molecules in organisms.

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Answer:

Composition. The ingredients of the solar nebula fell into 4 categories based on their condensation temperatures: metals, rocks, hydrogen compounds (water, methane, ammonia), and light gasses (hydrogen and helium).

Explanation:

Answer:

Aluminiun

Explanation:

The equation that represents a single replacement reaction given the various options is 2Al(s) + 6HCl -> 2AlCl₃(aq) + 3H₂O(g) (option 2)

A single replacement reaction, also known as single displacement reaction is a reaction in which elements higher in the electro-chemical series displace or replace elements lower in the electro-chemical series displace from a solution.

The following example illustrates single replacement reaction:

A + BC -> AC + B

From the above reaction, we can see that A has replace/displace B to from AC.

With the above information, we can determine the equation that represents single replacement reaction. Details below:

Equation from the questions:

From the above, we can see that only 2Al(s) + 6HCl -> 2AlCl₃(aq) + 3H₂O(g) conform to single replacement reaction.

Thus, the correct answer to the question is: 2Al(s) + 6HCl -> 2AlCl₃(aq) + 3H₂O(g) (option 2)

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Answer: 1 x 10-3 mol/L

Explanation:

Question

What concentration of H+ ions does a substance with a pH of 3 have​

the pH is the negative log of the H ion concentration in moles/liter

so pH3 has a hydrogen ion concentration of 1 x 10-3 mol/L

Answer:

The organisms that consume the primary producers are herbivores: the primary consumers. Secondary consumers are usually carnivores that eat the primary consumers. Tertiary consumers are carnivores that eat other carnivores.

The amount of barium-122 remaining after 10.00 minutes, which includes 5 half-lives, will be approximately 2.50 g. This is because each half-life reduces the amount of barium-122 by half.

Barium-122 has a half-life of 2.00 minutes. This means that every 2.00 minutes, half of the barium-122 will decay.

To determine how much barium-122 will be left when the experiment begins, we need to calculate the number of half-lives that occur during the 10.00 minutes it takes to set up the experiment.

Since each half-life is 2.00 minutes, the number of half-lives that occur in 10.00 minutes is 10.00 minutes / 2.00 minutes = 5 half-lives.

Each half-life reduces the amount of barium-122 by half. So, after 1 half-life, we have 80.00 g / 2 = 40.00 g remaining. After 2 half-lives, we have 40.00 g / 2 = 20.00 g remaining.

After 3 half-lives, we have 20.00 g / 2 = 10.00 g remaining. After 4 half-lives, we have 10.00 g / 2 = 5.00 g remaining. And after 5 half-lives, we have 5.00 g / 2 = 2.50 g remaining.

Therefore, when the experiment begins, there will be approximately 2.50 g of barium-122 left.

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Answer:

The proportionality constant ( Henry’s constant) = 2.32 * 10^-5 M/kPa

Explanation:

Here in this question, we are concerned with calculating the proportionality constant for this gas.

Mathematically, we can get this from Henry law

From Henry law;

Concentration = Henry constant * partial pressure

Thus Henry constant = concentration/partial pressure

Henry constant = 0.00290 M/125 kPa = 2.32 * 10^-5 M/kPa

Answer:

contain equal numbers of particles. ... MELTING POINT is the temperature at which a solid turns into liquid. ... Determine the energy required (in Joules) when the temperature of 3.21 grams of water increases by 4.0 °C ... Solve for at mater RW 100. ... How much heat energy is released when 12.8 g of barium oxide react with

Explanation:

The reaction that produces chlorine gas is \(FeCl3(aq) + Br2(l) → FeBr3(aq) + Cl2(g)\). This is the correct option D.

This is a redox reaction where \(FeCl3\) is the oxidizing agent and \(Br2\) is the reducing agent.

\(FeCl3\)oxidizes \(Br2\), causing it to lose electrons and form \(FeBr3\) and\(Cl2\). Chlorine gas is produced as a product of the reaction.

The other options do not produce chlorine gas.

Option a produces hydrogen gas and\(FeCl2\) as a product.

Option b produces copper(II) chloride and\(Fe\) as a product.

Option c produces calcium chloride and \(Fe(NO3)3\) as a product.

Option e produces no reaction as fluorine gas is too reactive to react with \(FeCl3\).

In conclusion, the correct option that produces chlorine gas is d. \(FeCl3(aq) + Br2(l) → FeBr3(aq) + Cl2(g)\).

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Hydroboration is an organic chemical reaction in which the boron atom of a boron compound BH3 is added across the double bond of an alkene. Hydroboration provides a route to organoboron compounds that can be converted in a variety of ways to various useful functional groups.

In this reaction, BH3 attacks the least hindered carbon in the alkene double bond and becomes attached to that carbon. H2O2/NaOH can be used to oxidize this boron compound to an alcohol.1-Methylcyclohexene is reacted with borane (BH3) to form 1-methylcyclohexyl borane:This intermediate is then hydrolyzed using hydrogen peroxide in the presence of sodium hydroxide:

This reaction produces the alcohol from the sequential hydroboration and H2O2/ OH- oxidation of 1-methylcyclohexene. The final product is 1-methylcyclohexanol with a hydroxy group attached to the carbon atom that was originally part of the double bond of the alkene. The equation is shown below:  1-methylcyclohexene → 1-methylcyclohexyl borane → 1-methylcyclohexanol

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Answer:Most rivers begin their life high up in the mountains and hills of the world.

Explanation:Rivers flow downhill, not necessarily south. Gravity is the ultimate determining force in terms of water flow. Water will flow downhill from the highest point to the lowest point using the path of least resistance.

Answer:

most rivers begin in a steep high area

The addition of orthophosphate ions (PO43-) decreases the solubility of Pb2+ ions by forming insoluble lead orthophosphate (Pb3(PO4)2). This reduces the concentration of free Pb2+ ions in solution. Without orthophosphate, Pb2+ ions remain more soluble and are present as free ions in higher concentrations.

When orthophosphate (PO43-) is added to a solution containing lead ions (Pb2+), it forms an insoluble compound called lead orthophosphate (Pb3(PO4)2). The addition of orthophosphate affects the solubility of lead ions, leading to key differences in the solubility equilibrium and the concentration of free Pb2+.

Without orthophosphate:

In the absence of orthophosphate, the solubility equilibrium of lead compounds, such as lead chloride (PbCl2) or lead nitrate (Pb(NO3)2), can be represented as follows:

PbX2 (s) ⇌ Pb2+ (aq) + 2X- (aq)

The solubility product constant (Ksp) expression for this equilibrium is given by:

Ksp = [Pb2+] [X-]^2

Where [Pb2+] represents the concentration of free lead ions and [X-] represents the concentration of the anion derived from the lead compound.

With orthophosphate:

Upon adding orthophosphate (PO43-), the following reaction occurs between lead ions and orthophosphate ions:

Pb2+ (aq) + 2PO43- (aq) ⇌ Pb3(PO4)2 (s)

Lead orthophosphate (Pb3(PO4)2) is insoluble and precipitates out of the solution. This removal of lead ions from the aqueous phase effectively reduces the concentration of free Pb2+ in the solution.

As a result, the concentration of free Pb2+ decreases in the presence of orthophosphate compared to the situation without orthophosphate. This reduction is due to the formation of the insoluble lead orthophosphate compound, which removes lead ions from the solution and decreases their availability for complexation or further reactions.

Overall, the addition of orthophosphate shifts the equilibrium towards the formation of lead orthophosphate, reducing the concentration of free Pb2+ ions in the solution.

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Explanation:

Malleability refers to the flexibility of something , e.g bending

Ductility refers to how long copper wire can be stretched

A) Element name is (i) gallium (ii) germanium

B) 4th period

C) Group = eka - aluminum - 13 and eka - silicon - 14

D) Gallium is metal germanium is metalloid

E) valence electrons = 3, 4

Mendeleev predicted the existence of the certain elements that is  not known at that time and named the two of them as eka-aluminum, and eka-silicon.

A) The name of the elements are :

(i) eka - aluminum = gallium

(ii) eka - silicon = germanium

B)  The period of these elements in the modern periodic table is both belongs to the 4th period.

C) The groups of these elements in the modern periodic table is gallium belongs t the group 13 and germanium belongs to the group 14.

D) The Gallium is metal germanium is metalloid.

E) Gallium electronic configuration : [Ar] 3d¹⁰ 4s² 4p¹, The valance electron is 3.

The germanium electronic configuration :  [Ar] 3d¹⁰ 4s² 4p², the valence electrons is 4.

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Answer:

3

Explanation:

It is based on empirical evidence

The characteristic of science is that it is based on empirical evidences comprising of a hypothesis.

Hypothesis can be defined as an assumption which is made for the sake of argument . It is an interpretation of a practical condition for which action needs to be taken.It is defined as a tentative assumption which is made to test logical consequences.It is an antecedent clause of a statement which is conditional.

It is constructed before research. There are six types of hypothesis 1)simple hypothesis 2) complex hypothesis 3) directional hypothesis 4)non-directional hypothesis 5) null hypothesis 6)casual hypothesis

The hypothesis should be clear and precise, it must be specific and way of explanation of hypothesis should be simple.

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Answer:

Having too much carbon dioxide in the body can cause nonspecific symptoms like headache, fatigue, and muscle twitches. Often, it clears up quickly on its own. With severe hypercapnia, though, the body can't restore CO2 balance and the symptoms are more serious

Explanation:

Answer:

B) A person activates a cold pack by hitting it against a surface.

C) A rechargeable battery is plugged in to charge.

D) Heat is used to separate a compound into its elements.

Explanation:

Chemical reactions that absorb energy are called endothermic reactions. Endothermic reactions absorb energy in the form of heat, light, or electricity, which causes the temperature of the system to decrease.

A) Plants use sunlight and atmospheric gases to make food through photosynthesis, which is an endothermic reaction that absorbs energy in the form of light.

B) A person activates a cold pack by hitting it against a surface, which triggers an endothermic reaction that absorbs heat from the surroundings, causing the cold pack to become cold.

C) A rechargeable battery is plugged in to charge, which involves an endothermic reaction that absorbs electrical energy, converting it into chemical energy that is stored in the battery.

D) Heat is used to separate a compound into its elements through heating, which is an endothermic reaction that absorbs heat from the surroundings, causing the temperature of the system to decrease.


ALLEN

Answer:

a syringe is a pump consisting of a sliding plunger that fits tightly in a tube.

Explanation:

a syringe is a pump consisting of a sliding plunger that fits tightly in a tube. the plunger can be pulled and pushed inside the precise cylinderell to, or burial, letting the syringe draw in or expel a liquid or gas through an office at the open end of the two.

Answer:

The plunger can be pulled and pushed inside the precise cylindrical tube, or barrel, letting the syringe draw in or expel a liquid or gas through an orifice at the open end of the tube.

Explanation:

Dietary protein will not be digested if Hcl were not being produced in sufficient quantities.

In the stomach, there are some glands found on the stomach lining that helps to release hydrochloric acid (HCl). Their major role is to dissolve food and produce an acidic medium.

The acidic media promotes and improves the conversion of pepsinogen to pepsin. Pepsin acts as an enzyme that supports protein digestion.

Protein digestion requires a pH of around 1.8 which can be achieved by the secretion of HCl.

As a result, if HCI is not released in the stomach in sufficient quantities, pepsin will not be activated and it would have a detrimental impact on protein digestion.

Therefore, we can conclude that dietary protein will not be digested if Hcl were not being produced in sufficient quantities.

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Answer:

will you help us with that one please

Answer:

Option B:the kinetic energies of the particles

Explanation:

Temperature is simply defined as a measure of the average amount of kinetic energy that is possessed by the particles in a sample.

Now, the more the particles experience vibration, translation and rotation, the higher the temperature of the object and vise versa.

Thus, the amount of heat energy depends on the kinetic energies of the particles

Answer: (1) Hydroxide ion

Explanation: Because LiOH is a base hydroxide ion is OH-

The answer is hydroxide ion.

Using this equation, we find the pH of pure water to be 7. This is considered to be neutral on the pH scale. The pH can either go up or down depending on the change in hydronium concentration. If the hydronium concentration increases, the pH decreases, causing the solution to become more acidic.

When an excess base is dissolved in a solution of sodium hydroxide. Sodium hydroxide dissociates into OH- ions and when the number of OH- increases then concentration also increases because concentration is the number of OH- ions present per unit volume.

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Specialized periodicals in which scientists publish the results of their works are called scientific journals.

In educational publishing, a scientific journal is a periodical book intended to similarly the progress of technology, typically by way of reporting new studies.

Journal articles may include original research, re-analyses of studies, opinions of literature in a selected place, proposals of new but untested theories, or opinion pieces.

These scientific journals include the following.

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Answer:

Explanation:

So, to begin answering your question, Earth has a greater gravitational pull than the moon simply because the Earth is more massive. The moon's gravitational pull also affects Earth, though; the rising and falling of the tides are an effect of the moon's gravity.      HOPE THIS HELPS ^^

Answer:

not enough information need more information to answer it

Answer: Natural Convection Boiling.

Nucleate Boiling.

Transition Boiling.

Explanation:

The following are the most critical parameters to control oxide growth: Temperature: The temperature at which oxide growth occurs is critical to the process.

The rate of oxide growth varies exponentially with temperature. For most materials, the oxidation rate doubles every 10°C increase in temperature. Ambient gas: The composition of the ambient gas and its partial pressure are critical to oxide growth. The oxygen concentration in the atmosphere affects oxide growth. The oxidation rate can be significantly reduced if the oxygen concentration is reduced or removed from the atmosphere. Metal composition: The material composition of the substrate to be oxidized has an impact on the oxidation rate.

Aluminum oxide, for example, grows more rapidly on pure aluminum substrates than on aluminum alloys. Oxidation can be significantly impacted by the presence of impurities or alloying elements.

Therefore, temperature at which oxide growth occurs is critical to the process.

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The absorption spectrum is used to determine the wavelength of a substance.

Electromagnetic radiation consists of different radiations of different frequency. The wavelengths of these radiations also differ from each other. When white light is allowed to pass through a medium it gets split into different radiations having different frequencies and wavelengths. These radiations interact with the molecules and matter present in the air and these radiations absorb energy and reach a higher energy level. If the higher energy levels are unstable, then they emit energy to reach to their ground state. This series of emissions and absorptions form a spectra known as the Absorption Spectra or Absorption Spectrum.

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