Answer the following about the diagram below:

Label (A), (B) and (C) in the image.
Is the reaction endothermic or exothermic? Explain your answer.
How would adding a catalyst affect the reaction?

Answer:

atomic number 8 and atomic number 12

Explanation:

atomic number 8 and atomic number 12 , element with the atomic number 8 is oxygen, and the element with atomic number 12 is Magnesium

Magnesium has low ionization energy, hence higher tendency to loose its two outermost electrons to form positive ion.

Oxygen has high electron affinity, hence higher tendency to accept or gain electrons to form negative ion.

The electronegativity difference between the element with atomic number 8 and element with atomic number 12 is greater for the formation of ionic bond

There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore, the correct option is option C.

Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.

An ionic compound is a metal and nonmetal combined compound.  Ionic compound are very hard. They have high melting and boiling point because of strong ion bond.

atomic number 8 =oxygen

atomic number 12= Magnesium

Magnesium has a low ionization energy and so a greater proclivity to lose its two outermost electrons to create a positive ion. Because oxygen has a high electron affinity, it is more likely to accept or acquire electrons to create a negative ion.

Therefore, the correct option is option C.

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Answer:

Any element in group 18 has eight valence electrons (except for helium, which has a total of just two electrons). Examples include neon, argon (Ar), and krypton . Oxygen, like all the other elements in group 16, has six valence electrons.

The predominant form of CH3CH2NH3 at pH = 14 will be the ionized form.

This is because at high pH, the solution is basic, and there are excess hydroxide ions. The hydroxide ions remove a proton from the ammonium ion, forming ammonia and water. The chemical equation for this reaction is as follows:CH3CH2NH3+ OH- → CH3CH2NH2 + H2O

The predominant form of CH3CH2NH3 at pH = 14 is CH3CH2NH2. This is the ionized form of the compound, which has lost a proton to become an amine. The structure of the predominant form of CH3CH2NH3 at pH = 14 is shown below:CH3CH2NH2

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Answer:

Float a few ping pong balls in your water tub. The slightest breeze will create waves in the water and keep a solid layer of ice from forming for a lot longer.

A chemical equation must balance according to the rule of conservation of mass. According to the rule, mass cannot be generated or removed during a chemical process. Here the number of moles of electrons transferred in the given equation is 6.

A chemical equation is said to be balanced if the quantity of each type of atom in the reaction is the same on both the reactant and product sides. In a balanced chemical equation, the mass and charge are both equal.

The numbers which are used to balance the given chemical equation are known as the coefficients.

Here the balanced equation is:

Al³⁺ (aq) + Hg(s) → Al(s) + Hg²⁺(aq)

The oxidation and reduction half-reactions are:

Oxidation eqn: Al³⁺ + 3e⁻ → Al(s)

Reduction eqn: Hg(s) → Hg²⁺(aq) +  2e⁻

However, we need to balance equations to have an equal number of electrons. The least common multiple of 3 and 2 is 6, so you'll need to multiply the equations accordingly.

Oxidation eqn: Al³⁺ + 3e⁻ → Al(s)) ₓ 2

Reduction eqn: Hg(s) → Hg²⁺ (aq) +  2e⁻ ) ₓ 3

Oxidation eqn: 2Al³⁺ + 6e⁻ → 2Al(s)

Reduction eqn: 3Hg(s) → 3Hg²⁺(aq) +  6e⁻

The electrons transferred is 6.

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Your question is incomplete, most probably your full question was:

how many moles of electrons are transferred when the equation Al³⁺ (aq) + Hg(s) → Al(s) + Hg²⁺(aq) is balanced using the smallest whole-number coefficients.

Answer:

14 dimes

Explanation:

48 nickels = 48 x .05 = $2.40

$3.80 - $2.40 = $ 1.40

$1.40 / .10 = 14 dimes

Answer: The p orbital can hold up to six electrons. We'll put six in the 2p orbital and then put the remaining electron in the 3s. Therefore the sodium electron configuration will be 1s22s22p63s1.

Explanation:

Answer:

examples of intensive properties are colours and density

Isoelectronic ions correctly lists the ions in order of increasing size is Ca²⁺ < K⁺ < Cl⁻ < P³⁻

When atoms, ions, or macromolecules share the same electronic properties and valence electron count, they are said to be isoelectronic. Its meaning is "equal charge" or "equal electric." Chemical species that are isoelectronic often have identical chemical characteristics.

The pH level at which a certain molecule has no net electric arc is known as the ionic strength (pI). The pH of the particle's surroundings has an impact on its net charge, which can shift more negatively or positively depending on whether protons are added or taken away.

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The complete question is-

Which of the following series of isoelectronic ions correctly lists the ions in order of increasing size (i.e., smallest to largest)?

A) Ca²⁺ < K⁺ < Cl⁻ < P³⁻

B) K⁺ < Ca²⁺ < P³⁻ < Cl⁻

C) P³⁻ < Cl⁻ < K⁺ < Ca²⁺

D) Cl⁻ < K⁺ < Ca²⁺ < P³⁻

E) K⁺ < Ca²⁺ < Cl⁻ < P³⁻

1s²2s²2p⁶3s²3p⁶4s²3d² is the correct electron configuration for Titanium (Ti). the correct  answer is B

There are 22 electrons in all, according to the electron arrangement. A neutral atom will contain 22 protons if it has 22 electrons. The element is determined by its atomic number where we know that

 The atomic number = number of proton = number  electrons

Atomic number 22 corresponds to titanium.

The chemical element titanium has the atomic number 22 and the symbol Ti. It only occurs naturally as an oxide, but it may be reduced to create a beautiful transition metal that has a silver hue, a low density, and a high degree of strength. It is also resistant to corrosion in sea water, aqua regia, and chlorine.

Therefore, The electronic configuration of titanium is 1s²2s²2p⁶3s²3p⁶4s²3d² or [Ar] 3d²4s²

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Answer:

they are weak forces that attract neutral molecules to one another

Explanation:

particles in liquid or air vibrate and move constantly thus they collide

The oxidation number of an element in a compound is equal to the charge of the atoms if the compound was an ionic compound.

The types of compounds are:

Ionic compounds:

Covalent compound:

Molecular compounds:

Therefore, the oxidation number of an element in a compound is equal to the charge of the ion that would have if the compound was an ionic compound.

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The given ionization constant for water (Kw) is 2.9 × 10−14 at 40 °C.  The [H3O+], [OH-], pH, and pOH values of pure water at 40 °C are [H3O+] = [OH-] = 1.7 x 10^-7, pH = 6.77, and pOH = 7.23

We are to calculate [H3O+], [OH−], pH, and pOH for pure water at 40 °C.

The dissociation of water into hydroxyl ions and hydronium ions can be represented as follows: H2O(l) ⇌ H+ (aq) + OH− (aq)The equilibrium constant, Kc, for this reaction is given by the expression :

Kc = [H+][OH−]/[H2O]

Since water is a pure liquid, its concentration is considered to be constant and its value is

1.00 x 10^-7 at 40°C.

Kc = [H+][OH−]/1.00 x 10^-7Kw

= [H+][OH−]Kw

= 2.9 x 10^-14[H+][OH−]

= 2.9 x 10^-14[H3O+] = [OH-]

= √(2.9 x 10^-14) = 1.7 x 10^-7pH

= -log[H3O+] = -log(1.7 x 10^-7)

= 6.77pOH = -log[OH-]

= -log(1.7 x 10^-7)

= 6.77pH + pOH

= 14.00 (constant at 25°C)

Therefore, pH + pOH at 40°C is given by

pH + pOH = 14.00p

OH = 14.00 - pHpOH

= 14.00 - 6.77

pOH = 7.23

Hence, the [H3O+], [OH-], pH, and pOH values of pure water at 40 °C are [H3O+] = [OH-] = 1.7 x 10^-7, pH = 6.77, and pOH = 7.23.

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Answer:

B) Amount of matter within an object

C) amount of matter within a given volume

Explanation:

\({}\)

Answer:

Food chain, in ecology, the sequence of transfers of matter and energy in the form of food from organism to organism. Food chains intertwine locally into a food web because most organisms consume more than one type of animal or plant. ... In a predator chain, a plant-eating animal is eaten by a flesh-eating animal.

Explanation:

Answer:

R = 8.314 pKa*L/mol*K

The value for the ideal gas constant (R) is approximately 8.314 kPa·L/(mol·K).

To determine the value for the ideal gas constant (R) when pressure (P) is in kilopascals (kPa), temperature (T) is in kelvins (K), volume (V) is in liters (L), and amount of gas (n) is in moles, we need to use the appropriate units for R based on these measurements.

The ideal gas constant, R, can be expressed in various units. The most common units for R are:

R = 0.0821 L·atm/(mol·K) (atmospheres, liters, moles, and kelvins)

However, since you provided the measurements in kilopascals, liters, moles, and kelvins, we need to use a different value for R that is consistent with these units:

R = 8.314 kPa·L/(mol·K)

Therefore, when pressure is in kilopascals, volume is in liters, amount of gas is in moles, and temperature is in kelvins, the value for the ideal gas constant (R) is approximately 8.314 kPa·L/(mol·K).

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The mass (in grams) of sodium sulfide, Na₂S, needed to react completely with 0.12 g aluminum fluoride, AlF₃ is 0.17 g

The mass of sodium sulfide, Na₂S, needed can be obtain as illustrated below:

Balanced equation:

2AlF₃ + 3Na₂S -> Al₂S₃ + 6NaF

From the balanced equation above,

168 g of AlF₃ reacted with 234 g of Na₂S

Therefore,

0.12 g of AlF₃ will react with = (0.12 × 234) / 168 = 0.17 g of Na₂S

Thus, we can conclude from the the above calculation that the mass of  sodium sulfide, Na₂S needed is 0.17 g

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Answer:

Venus

Explanation:

From the sun outwards is   Mercury   Venus  Earth  and then Mars

Following are the the effect of each solution on the red blood cells as per the given information :

a) crenation

b) neither

c) hemolysis

d) crenation

e) neither

The behavior of red blood cells (RBCs) in different solutions can be determined by comparing the tonicity of the solution to the tonicity of the RBC.

A hypertonic solution has a higher solute concentration than the cell and will cause water to move out of the cell, leading to crenation (shrinking) of the RBC.

A hypotonic solution has a lower solute concentration than the cell and will cause water to move into the cell, leading to hemolysis (bursting) of the RBC.

An isotonic solution has the same solute concentration as the cell and will not cause any net movement of water.

Using this given information, we can determine the effect of each solution on the RBCs:

a) 4.19% (m/v) NaCl solution is hypertonic to the RBC, so water will move out of the cell and cause crenation.

b) 1.78% (m/v) glucose solution is isotonic to the RBC, so it will not cause any crenation or hemolysis.

c) Distilled H2O is hypotonic to the RBC, so water will move into the cell and cause hemolysis.

d) 7.6% (m/v) glucose solution is hypertonic to the RBC, so water will move out of the cell and cause crenation.

e) 5.0% (m/v) glucose and 0.9% (m/v) NaCl solution is isotonic to the RBC, so it will not cause any crenation or hemolysis.

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Answer:

Solids, liquids and gases are called the three states of matter. I think the answer is density. In general, solids are denser than liquids, which are denser than gases. Also solids have a fixed shape and a fixed volume. Liquids have a fixed volume, but no fixed shape. Gases have neither a fixed volume nor a fixed shape.

Explanation:

Hope this helps

Wavelength (L) is calculated using: L = gT²/2π, here g=9.8 m/s2 and T is wave period in seconds.

Wavelength of a wave describes how long the wave is and the distance from the "crest" (top) of one wave to the crest of next wave is called wavelength. We can also measure from the "trough" (bottom) of one wave to trough of next wave and get the same value for the wavelength.

We measure wavelength in following ways:

Use photometer to measure the energy of wave.

Convert energy into joules (J).

Divide energy by Planck's constant, 6.626 x 10⁻³⁴, to get the frequency of  wave.

Divide speed of light, ~300,000,000 m/s, by frequency to get wavelength.

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Answer

To convert μg/l to mol/kg?

Step 1: from the mass in grams, find the number of moles by diving the mass by its molar mass

Step 2: To go from L to kg, take the volume given multiply it by density in kg/L

The reaction as follows,

(CH₃)₂NH (aq) + H₂O (aq) ------------> (CH₃)₂​​​NH₂⁺ (aq) + OH⁻ (aq)

The net ionic equation will be,

(CH₃)₂NH  (aq) + H⁺(aq) ---------> (CH₃)₂​​​NH₂⁺  (aq)

Bronsted-Lowry base are proton acceptor, so (CH₃)₂NH  is a base as, it accepts proton to form (CH₃)₂NH . A Brønsted-Lowry base is any species that is capable of accepting a proton, which requires a lone pair of electrons to bond to the H⁺ . Water is amphoteric, which means it can act as both a Brønsted-Lowry acid and a Brønsted-Lowry base.

The net ionic equation will be,

(CH₃)₂NH  (aq) + H⁺(aq) ---------> (CH₃)₂​​​NH₂⁺  (aq)

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Most organic compounds contain carbon and hydrogen.The term organic means of, relating to, or derived from living matter. Organic compounds are carbon-containing molecules that form the basis of living organisms. These compounds contain covalent bonds and are usually insoluble in water.

Most organic compounds contain carbon and hydrogen, but they can also contain other elements like oxygen, nitrogen, sulfur, and phosphorus. Some organic compounds include carbohydrates, proteins, lipids, and nucleic acids. These compounds are essential to life and make up the cells, tissues, and organs of living organisms.

The importance of organic compounds cannot be overstated, as they are involved in a wide variety of biological processes. For example, carbohydrates are a source of energy for the body, while proteins are involved in cellular repair and maintenance. Lipids form the membranes that surround cells, and nucleic acids contain the genetic information that is passed down from one generation to the next.

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Answer:

I don't really get your question but I think my answer relates to your question :)

Explanation:

Due to the high availability of sunlight, sea grass can get the sufficient light energy to carry photosynthesis and storage of energy.

Photosynthesis is a biochemical process by which green plants synthesis energy and in the leaves by the aid of light energy. Here, the light energy is converted to chemical energy.

Plants need sunlight for the light reaction of photosynthesis. In the absence of sunlight, they cant synthesis energy and the chlorophyll does not get active. They will grow towards sunlight.

The sea grass are getting sufficient light energy for the synthesis of energy. The energy storage molecules ie. ATP in sea grass will be synthesized in higher rate with the presence of sun shining.

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Answer:

Because both the bonding electrons come from the oxygen atom. Explanation: A coordinate covalent bond is formed when both the bonding electrons are coming from the same atom

Explanation:

Answer:

D. 4

Explanation:

mass number - number of neutrons = number of protons

Explanation:

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