Most of an atom's volume is found:

in the protons and neutrons

in the nucleus

between the protons and
neutrons

in the electron cloud

The product of photosynthesis that plants make as a source of energy for their life functions is glucose.

It is the method by which plants generate their own food by transforming light energy from the sun into chemical energy in the form of organic molecules (carbohydrates).Photosynthesis is a process that plants, algae, and some bacteria use to convert sunlight into energy.

This method transforms light energy from the sun into chemical energy in the form of organic molecules, the most important of which is glucose, a form of sugar. This is accomplished via a series of complex reactions that take place in the chloroplasts of plant cells.

Glucose is one of the most significant carbohydrates, and it is a critical fuel source for almost all living cells. When the body breaks down glucose for energy, carbon dioxide and water are produced. This process, known as cellular respiration, also produces adenosine triphosphate (ATP), a molecule that transports chemical energy inside cells for metabolism.

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Answer:

carbon-12 has a mass of 12.

carbon-13 has a mass of 13

Explanation:

by adding the protons and neutrons of each atom

6+6=12

6+7=13

Answer:

A large amount or number of something any things

Explanation:

The masses refers to a large,general group of regular folks_ the common people of a society.

Answer:

chemical energy

Explanation:

A battery stores energy in the form of chemical energy. Chemical energy is stored in the bond of atoms and molecules. These bonds break and convert to other forms of energy. In the given case, the chemical energy is converted to electric energy which powers the flashlight. Thus, flashlight receives energy input in the form of chemical energy.

Iron filings burning when sprinkled over a gas flame to produce iron(III) oxide is an example of a combustion reaction.

.In this case, the iron filings (Fe) react with oxygen from the gas flame to form iron(III) oxide (Fe₂O₃). The reaction can be represented by the following equation:

4Fe + 3O₂ → 2Fe₂O₃

During the combustion process, the iron filings undergo a chemical change as they combine with oxygen to form a new compound, iron(III) oxide. This reaction is exothermic, meaning it releases energy in the form of heat and light. The heat produced causes the iron filings to burn, resulting in the formation of iron(III) oxide.

Iron(III) oxide is a reddish-brown compound commonly known as rust. It has a different chemical composition and physical properties compared to the original iron filings. The reaction between iron and oxygen is highly exothermic, making it a suitable demonstration for the combustion process.

In summary, the burning of iron filings when sprinkled over a gas flame to produce iron(III) oxide is a combustion reaction where iron reacts with oxygen to form a new compound, releasing heat and light in the process.

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Sugar is a simple carbohydrate consisting of carbon, oxygen, and hydrogen molecules which are linked by covalent bonds.

The chemical covalent bonds are a type of chemical bond in which atoms that differ in their electronegativity share electrons to maintain cohesion i.e., intramolecular cohesion, while sugar molecules may interact by glycosidic bonds.

Therefore, with this data, we can see covalent bonds bind atoms in the sugar molecule while glycosidic bonds are those required to connect different sugar and thus form a complex macromolecule or polysaccharide.

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The [H3O+] concentration when [OH-] = 3.3 x 10^-9 M is 3.03 x 10^-6 M. Therefore, to find the [H3O+] concentration when given the [OH-] concentration,

In water, the product of [H3O+] and [OH-] is always constant at 1.0 x 10^-14 M^2. We can use this relationship: [H3O+] x [OH-] = 1.0 x 10^-14 M^2
Plugging in the given [OH-] concentration: [H3O+] x 3.3 x 10^-9 M = 1.0 x 10^-14 M^2
Solving for [H3O+]:
[H3O+] = (1.0 x 10^-14 M^2) / (3.3 x 10^-9 M)
[H3O+] = 3.03 x 10^-6 M.

To find the [H3O+], simply divide the Kw value by the given [OH-] concentration.
Now, calculate the [H3O+] using the given [OH-] value:
[H3O+] = 1 x 10^-14 / (3.3 x 10^-9)
[H3O+] ≈ 3.03 x 10^-6 M.

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The mass, in metric tons, of carbon in the methane is 1.83 metric tons

From the question, we are to determine the quantity of carbon in the methane

The mass of carbon in the methane can be calculated from

Mass of carbon in the methane = \(\frac{Mass\ of\ carbon\ in\ a\ molecule\ of \ methane}{Mass\ of\ a\ molecule\ of \ methane}\times Total\ mass\ of\ the\ methane\)

Mass of carbon in a molecule of methane = 12 g

Mass of a molecule of methane = 16 g

Therefore,

Mass of carbon in the methane = \(\frac{12}{16} \times 2.44\)

Mass of carbon in the methane = 1.83 metric tons

Hence, the mass, in metric tons, of carbon in the methane is 1.83 metric tons

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No, spoiling milk is not a chemical change. Spoiling milk is a physical change, which is a change in the state or appearance of a substance without changing its chemical composition.

When milk spoils, it is still composed of the same molecules, but its physical properties (such as taste, smell, and texture) have changed. Spoiling milk is caused by the growth of microorganisms, such as bacteria, which break down milk proteins and fats, causing changes in the milk's appearance, taste, and smell.  In the case of milk, spoiling is the result of the growth of bacteria, which is a physical change.  A physical change is a change in the physical state or appearance of a substance without any change in the chemical composition or identity of the substance.

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The weak acids are HNO₂ and HF. Option D is correct.

HNO₂ (nitrous acid) and HF (hydrofluoric acid) are considered weak acids because they only partially dissociate in water, resulting in a relatively low concentration of H⁺ ions in solution. On the other hand, HNO₃ (nitric acid) and H₂PO₄⁻ (dihydrogen phosphate) are strong acids, which fully dissociate in water, producing a high concentration of H⁺ ions.

On the other hand, HNO₃ (nitric acid) and H₂PO₄⁻ (dihydrogen phosphate) are both strong acids;

HNO₃ is a strong acid that fully dissociates in water, resulting in a high concentration of H⁺ ions.

H₂PO₄⁻ is a weak acid in its conjugate acid form (dihydrogen phosphate), but as H₂PO₄⁻, it acts as a weak base rather than a weak acid.

Hence, D. is the correct option.

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Dissolve NaOH into the Solution will - Increased E

Increase the temperature - Increased E

Increase the amount of \(PbCl_{2}\) - No change in E

Dilute the solution by adding \(H_{2}O\) - Increased E              

E= Voltage or the electromotive force generated in the cell

Dissolving NaOH will increase the conductivity and number of ions in the cell and Increases E .  Adding water also increases the presence of hydrogen and hydroxide ions in the solution and Increases E.

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An extremely efficient enzyme has a small KM and a large kcat.

The conversion rate at the lowest substrate concentration is measured in kcat/km. This interpretation is accurate. kcat/Km is a good indicator of an enzyme's effectiveness since it takes into account both the enzyme's maximum rate, kcat, and its affinity for its substrate (Km).The turnover number, or the number of molecules that may be created per second per active site, of an enzyme is provided by the formula k c a t / kM.Because the substrate concentration is almost usually much greater than the Km, in many situations, enzymes are only better when they have a larger kcat. It seems disingenuous to me to use the ratio when this is plainly the case, yet it still happens much too frequently. It could serve as a useful benchmark when compared to enzymes in particular situations.

complete question:An extremely efficient enzyme has a _____ KM and a _____ kcat.

A) small; small

B) small; large

C) large; large

D) large; small

E) kcat and KM do nothing to predict the efficiency of an enzyme

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Isomer B (trans-1,2-dichloroethene) has the higher equilibrium vapor pressure at 20°C due to weaker intermolecular forces.

To determine which of the two isomers of 1,2-dichloroethene has the higher equilibrium vapor pressure at 20°C, we need to consider their molecular structures and intermolecular forces.

Isomer A:

  Cl    Cl

   \   /

    C=C

Isomer B:

 Cl    H

  |   |

  C=C

Both isomers have the same molecular formula (C2H2Cl2), but their structures differ. Isomer A is cis-1,2-dichloroethene, while Isomer B is trans-1,2-dichloroethene.

The equilibrium vapor pressure of a liquid depends on the strength of the intermolecular forces between its molecules. In general, stronger intermolecular forces result in lower vapor pressure because more energy is required to overcome those forces and convert the substance into a gas.

Comparing the two isomers, we can observe that Isomer A (cis-1,2-dichloroethene) has a more compact structure, with the chlorine atoms on the same side of the double bond.

This arrangement leads to stronger dipole-dipole interactions between the molecules, which are a type of intermolecular force. Consequently, Isomer A experiences stronger intermolecular forces compared to Isomer B.

As a result of the stronger intermolecular forces, Isomer A (cis-1,2-dichloroethene) will have a lower equilibrium vapor pressure at 20°C compared to Isomer B (trans-1,2-dichloroethene).

The molecules of Isomer A are less likely to escape into the gas phase due to the stronger attractions between them.

Therefore, Isomer B (trans-1,2-dichloroethene) will have the higher equilibrium vapor pressure at 20°C because it experiences weaker intermolecular forces compared to Isomer A.

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Citric acid is added to food to add tartness and enhance the flavor. The correct option is b.

Citric acid, a natural compound found in citrus fruits, is commonly added to food for its tart flavor and ability to enhance taste. Here's a step-by-step explanation:

1. Tartness: Citric acid is highly acidic and has a sour taste. When added to food, it provides a sharp, tangy flavor that adds tartness. This tartness can help balance the overall taste profile of a dish, especially in sweet or savory recipes.

2. Flavor enhancement: Citric acid acts as a flavor enhancer, intensifying the existing flavors in food. It has the ability to enhance the perception of other taste sensations, such as sweetness and saltiness, making food taste more vibrant and flavorful.

3. Preservation: Citric acid also acts as a natural preservative in some food products. It has antimicrobial properties that inhibit the growth of certain bacteria and fungi, helping to extend the shelf life of foods and prevent spoilage.

4. pH adjustment: Citric acid can be used to adjust the pH level of certain food products. It is commonly used in canning and preserving processes to create an acidic environment that inhibits bacterial growth and helps maintain product quality and safety.

Overall, the addition of citric acid to food primarily serves to enhance flavor, provide tartness, and potentially contribute to preservation. Option b is the correct one.

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Considering the information in the Introduction section, the best explanation for this difficulty is the value of the van't Hoff coefficient of the salt must be known.

The Van't Hoff factor (i) is a dimensionless number that is used to describe the degree of dissociation or association of a solute in a solution. It is defined as the ratio of the number of particles in solution to the number of solute molecules added to the solution.

For a solute that dissociates into two or more ions, the Van't Hoff factor is greater than 1, and it is equal to the number of ions produced by the dissociation of one molecule of the solute. For example, if a solute dissociates into two ions, its Van't Hoff factor would be 2.

For a solute that associates to form larger species in solution, the Van't Hoff factor is less than 1. For example, if solute associates to form dimers in solution, its Van't Hoff factor would be 0.5.

Therefore, Considering the information in the Introduction section, the best explanation for this difficulty is the value of the van't Hoff coefficient of the salt must be known.

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Hello!!!

Answer: Therefore elements with high ionization energies have more positive electron affinity whereas alkali metals having the lowest ionization energy do not tend to add electrons.

Explanation:  So energy is to be supplied for the addition of electrons and shows positive electron affinity.

Hope This Helps You Out! So... The Answer Your Looking For Is "True"

The statement is true as  all elements with high ionization energy have more electrons and hence have   high electron affinity​.

It is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.

Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.

The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.

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To increase the amount of light that a device is converting, you can optimize the photovoltaic material and the surface area.

The choice of photovoltaic material plays a crucial role in light conversion. Research and development efforts focus on enhancing the efficiency of existing materials or discovering new materials with better light absorption and conversion properties.

When you increase the surface area of the device exposed to light, it can enhance light absorption. This can be achieved through design modifications that trap or scatter light, or by using materials with a higher surface area-to-volume ratio.

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Answer:

51.9961 grams

Explanation:

Just did worksheet

Answer:

"The effect of increasing proton number is greater than that of the increasing electron number therefore, there is a greater nuclear attraction."

Explanation:

I got this off of Gogle, I would suggest using it for questions like this. I hope you have good luck on other questions! :)

Answer:

\(\huge\boxed{\sf v_f = 1.48\ m/s}\)

Explanation:

Height = h = 9m

Acceleration due to gravity = g = 9.8 m/s²

Initial Velocity = Vi = 0 m/s

Final Velocity = Vf = ?

\(2gh = v_f^2 - v_i^2\) (Third equation of motion for free-falling bodies)

2(9.8)(9) = vf² - 0²

2.18 = vf²

vf² = 2.18

Take sq. rt on both sides

\(\rule[225]{225}{2}\)

Answer:

basic

Explanation:

ph>7 soits basic not acidic

Answer: A pH greater than 7 is basic

Explanation:

Because if you look at a ph scale the number 12 is apart of the alkaline part. if its apart of the alkaline park it mean it is not a basic acidic

Cations are always smaller than the atoms from which they form. Anions are always larger than the atoms from which they form. Ions are usually bigger than the atoms from which they are formed.

When an atom receives or loses electrons, the atom's electron configuration changes, resulting in a net positive or negative charge.

This net charge expands the electron cloud surrounding the nucleus, making the ion bigger in size than the neutral atoms from which it arose. When a metal atom loses one or more electrons to create a cation, it shrinks in size because the positive charge of the nucleus pulls the remaining electrons more strongly.

When a nonmetal atom obtains one or more electrons to create an anion, it normally expands in size.Because of the increasing amount of electrons, the electron cloud surrounding the nucleus grows. It should be noted that this comparison is not absolute and is dependent on the individual factors involved. Some ions are smaller than their neutral atom counterparts, while others are similar in size.

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The complete question is:

Compare the size of ions to the size of atoms from which they form.

The correct answers are: Predicted products of the reaction between Ba(NO3)2(aq) and K2SO4(aq): D) BaSO4(s) and KNO3(aq)

In the reaction AgNO3(aq) + HI(aq) → AgI(s) + HNO3(aq), the spectator ions are:

C) H+ and I−

Explanation:

For the first question, we need to identify the products formed when Ba(NO3)2(aq) and K2SO4(aq) react. To determine the products, we need to consider the combination of the cations and anions in the reactants.

Ba(NO3)2 contains the Ba2+ cation and the NO3− anion.

K2SO4 contains the K+ cation and the SO42− anion.

When these ions combine, a double displacement reaction occurs. The Ba2+ cation will combine with the SO42− anion to form an insoluble salt, BaSO4, which precipitates out of the solution as a solid. The K+ cation will combine with the NO3− anion to form KNO3, which remains in the solution as an aqueous compound.

Therefore, the correct answer is D) BaSO4(s) and KNO3(aq) as the predicted products of the reaction.

For the second question, the reaction between AgNO3(aq) and HI(aq) produces AgI(s) and HNO3(aq). The Ag+ and I− ions combine to form a solid AgI precipitate, which is insoluble and falls out of solution. The H+ and NO3− ions, on the other hand, remain in the solution as spectator ions and do not participate in the formation of the precipitate.

Therefore, the correct answer is C) H+ and I− as the spectator ions in the reaction.

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Answer:

The individual components of a mixture can be physically separated from each other. Chemical compounds are very different from mixtures: The elements in a chemical compound can only be separated by destroying the compound.

The formula for Iron (III) Oxide, Fe2O3, is composed of two Fe atoms and three O atoms. Therefore, 1.8 moles of Fe2O3 contains 1.8 x 6 = 10.8 formula units.

A formula is a mathematical statement expressed in symbols and numbers. It is used to calculate a certain value or to solve a problem. Formulas are often used in science, engineering, and mathematics to provide a concise way of expressing an equation or calculation. For example, the formula for the area of a circle is A = πr2, where A represents the area, π is a constant equal to 3.14 and r is the radius of the circle. Formulas can also be used to express relationships between different variables or to describe a process. For example, the formula for kinetic energy is KE = 1/2 mv2, where KE is the kinetic energy, m is the mass of the object, and v is its velocity.

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Answer:

1st one

Explanation:

Answer:

B

Explanation:

chlorine 2×3= 6 not sure

The rocks are classified as igneous, metamorphic, and sedimentary use the formation for classification purposes.

The outermost of them, called the crust, is composed of three types of rocks: magmatic, sedimentary and metamorphic. They are defined through the origin of several minerals and can be characterized with chemical composition, texture or shape, but the most used specification is based on composition.

The property does Valerie use for classification purposes is formation.

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Answer:

3

Explanation:

Answer:

The solution formed is acidic

pH = 0.87

Explanation:

The acid-base reaction of NaOH with HCl is:

NaOH + HCl → NaCl + H₂O

Where 1 mole of NaOH reacts with 1 mole of HCl

In the problem, moles of NaOH and HCl are:

NaOH: 0.0250L × (0.525mol / L) = 0.013125 moles NaOH

HCl: 0.0750 × (0.355mol / L) = 0.026625 moles HCl

As moles of HCl > moles NaOH, HCl is in excess and the solution formed is acidic

Moles in excess of HCl are:

0.026625 moles - 0.013125 moles = 0.0135 moles HCl

As the volume of the solutions is 25.0mL + 75.0mL = 100.0mL = 0.100L, molarity of HCl after reaction is:

0.0135 moles HCl / 0.100L = 0.135M HCl = 0.135M H⁺

As pH is defined as - log [H⁺], pH of the solution is:

pH = -log 0.135M H⁺ = 0.87

pH = 0.87

The pH of the resulting solution of the acid and base mixture is; Acidic with a PH = 0.87

We are given;

Volume of NaOH = 25 mL = 0.025 L

Volume of HCl = 75 mL = 0.075 L

Concentration of NaOH = 0.525 M

Concentration of HCl = 0.355 M

Total volume of solution = 0.025 + 0.075 = 0.1 L

Now, the the equation of the reaction is;

HCl + NaOH = NaCl + H2O

We can see that 1 mole of HCl reacts with 1 mole of NaOH.

Since; number of moles = Volume × concentration

Number of moles of HCl = 0.075 × 0.355

Number of moles of HCl = 0.026625 moles

Similarly;

Number of moles of NaOH = 0.025 × 0.525

Number of moles of NaOH = 0.013125 moles

We can see that the number of moles of HCl is greater than that of NaOH and as such there is excess HCl acid in the mix.

Thus,

Excess moles of HCl acid = 0.026625 - 0.013125

Excess moles of HCl acid = 0.0135 moles

Concentration of this excess HCl is gotten by the formula;

M = Excess moles/total volume

M = 0.0135/0.1

M = 0.135 M

PH of this excess concentration is;

PH = -log [H+]

PH = -log [0.135]

PH = 0.87

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