If ice is added to a large fish tank and a small fish bowl, both at the same termperature, the large fish tank's water will cool faster because there is more water.
TRUE OR FALSE

Answer :If the earth was in the area of which the star is then the planet would then exit the habitabillity ring and pretty much burn off all life.

Answer:

a

Explanation:

Atoms form bonds by donating,accepting or sharing electrons with other atoms as bonding gives atoms same number of electrons as a noble gas which is similar to it's electronic configuration.

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.

Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.

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Sugar is composed of molecules with covalent bonds of different types. The primary type of covalent bond found in sugar is a glycosidic bond, which is a type of covalent bond that connects two monosaccharides.

Monosaccharides are the building blocks of sugars and are composed of carbon, hydrogen, and oxygen atoms. A glycosidic bond is formed when an oxygen atom found in one monosaccharide bonds with a hydrogen atom found in another monosaccharide. This type of covalent bond is what holds the two monosaccharides together and forms a sugar molecule. Hydrogen bonds occur when a hydrogen atom is shared between two electronegative atoms (such as oxygen or nitrogen). This creates a weak bond that is still strong enough to hold molecules together. In the case of sugar, the hydrogen bonds are formed between the hydrogen atoms of the different sugar molecules, helping to keep them connected.

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Answer  usually expressed In the units of the last Qrder of the value of the ... one, two or three significant figures, we find the value of the root in the tn ... The numbers in the table can be regarded as the right-hand ... 1.63 5.1039 0.1959.

Explanation: I hope this helps <3

Explanation:

carbon dioxide

CO2

type of reaction is combustion

Explanation:

In a physical change the nature of the substance, the particles of which it is composed and the numbers of particles remain unchanged. In a chemical change the properties of the new substances are different from the original, the particles are different and the number of particles can change

The formation of ionic bonds between elements from Group I (alkali metals) and Group VII (halogens) occurs through a transfer of electrons. Alkali metals have one valence electron in their outermost shell, while halogens require one more electron to complete their outermost shell and achieve a stable electron configuration.

Let's take the example of sodium (Na) from Group I and chlorine (Cl) from Group VII to illustrate the formation of an ionic bond. Sodium has one valence electron, while chlorine requires one electron to complete its outer shell.

In a dot-and-cross diagram, sodium is represented by the symbol Na, with a dot next to it representing its single valence electron. Chlorine is represented by the symbol Cl, with seven dots around it representing its seven valence electrons.

To form an ionic bond, sodium will transfer its single valence electron to chlorine. This results in sodium losing one electron to become a positively charged sodium ion (Na+), as it now has one less electron than protons. Chlorine, on the other hand, gains the electron from sodium, resulting in a negatively charged chloride ion (Cl-), as it now has one more electron than protons.

In the dot-and-cross diagram, the electron transfer is represented by an arrow from sodium to chlorine, indicating the movement of the electron. The final configuration shows the sodium ion (Na+) with no dots around it, indicating the loss of its valence electron, and the chloride ion (Cl-) with eight dots around it, representing the complete octet in its outermost shell.

The resulting sodium ion and chloride ion are held together by the strong electrostatic attraction between the oppositely charged ions. This attraction forms an ionic bond, creating an ionic compound known as sodium chloride (NaCl), commonly known as table salt.

This process of electron transfer and formation of ionic bonds occurs between elements from Group I and Group VII, leading to the creation of stable compounds with full outer shells for both elements.\(\huge{\mathcal{\colorbox{black}{\textcolor{lime}{\textsf{I hope this helps !}}}}}\)

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Ce(IO3)3 will not precipitate from the solution.

To determine if Ce(IO3)3 will precipitate from the solution, we need to calculate the concentration of Ce3+ and IO3- ions in the solution, and then use the solubility product constant (Ksp) to determine if a precipitate will form.

First, let's calculate the number of moles of Ce(NO3)3 added to the solution:

nCe(NO3)3 = (750.0 mL) (4.00 x 10^-33 mol/L) = 3.00 x 10^-30 mol Ce(NO3)3

Next, let's calculate the number of moles of KIO3 in the solution:

nKIO3 = (300.0 mL) (2.00 x 10^-2 mol/L) = 6.00 x 10^-3 mol KIO3

Since KIO3 is a strong electrolyte, it will dissociate completely in solution, giving us the same number of moles of IO3- ions:

nIO3- = 6.00 x 10^-3 mol

Since Ce(NO3)3 is also a strong electrolyte, it will dissociate completely to give us 3 times the number of moles of Ce3+ ions:

nCe3+ = 3.00 x 10^-30 mol x 3 = 9.00 x 10^-30 mol

Now, let's calculate the concentration of Ce3+ ions:

[Ce3+] = (9.00 x 10^-30 mol) / (1050.0 mL) = 8.57 x 10^-34 M

Finally, we can calculate the ion product (IP) of Ce(IO3)3:

IP = [Ce3+] [IO3-]^3 = (8.57 x 10^-34)^1 (6.00 x 10^-3)^3 = 7.34 x 10^-41

Comparing this value to the Ksp of Ce(IO3)3 (1.9 × 10^-10), we see that IP << Ksp.

Therefore, Ce(IO3)3 will not precipitate from the solution, and the solution will remain homogeneous.

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Answer:

Its b its the state not anything else

A physical change has occurred has occurred when evaporating water producing gaseous water as a  physical change  results in a phase change, not a change in composition.

Physical changes are defined as changes which affect only the form of a substance but not it's chemical composition. They are used to separate mixtures in to chemical components but cannot be used to separate compounds to simpler compounds.

Physical changes are always reversible using physical means and involve a change in the physical properties.Examples of physical changes include melting,boiling , change in texture, size,color,volume and density.Magnetism, crystallization, formation of alloys are all reversible and hence physical changes.

They involve only rearrangement of atoms and are often characterized to be changes which are reversible.

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Answer:

False, assuming this is a true/false question.

Explanation:

Energy is converted from one form to another, not destroyed nor created.  The suns' energy comes for energy released in nuclear reactions. Energy consumed is converted to another form, such as plant and animal sugars and carbohydrates, where it is stored in the bonds among the elements.

Answer:

b is the answer hope that helps

Answer:

The final temperature is 348.024°C.

Explanation:

Given data:

Specific heat of copper = 0.385 j/g.°C

Energy absorbed = 7.67 Kj (7.67×1000 = 7670 j)

Mass of copper = 62.0 g

Initial temperature T1 = 26.7°C

Final temperature T2 = ?

Solution:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = T2 - T1

Q = m.c. ΔT

7670 J = 62.0 g × 0.385  j/g °C ×( T2- 26.7 °C )

7670 J = 23.87 j.°C ×( T2- 26.7 °C )

7670 J / 23.87 j/°C = T2- 26.7 °C

T2- 26.7 °C = 321.324°C

T2 = 321.324°C + 26.7 °C

T2 = 348.024°C

The final temperature is 348.024°C.

The ice is the naturally formed crystalline solid with an ordered structure and have the definite chemical composition . The ice is considered as the mineral.

The ice is the naturally occurring crystalline solid or the inorganic compounds. The ice as the solid have the definite shape and the volume. The ice has the ordered structure with the definite chemical composition. The chemical formula for the ice is H₂O. Therefore the ice is considered to be as the mineral. On the other hand the liquid water is not considered as the mineral.

The ice has the hexagonal crystal structure. Ice is an oxide mineral. Ice has hardness of 1.5 that means we can scratched it by the finger.

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In Chemistry, we always have to balance the equations, in many topics within the subject of Chemistry, it is required to do that, this is because we have to account for every atom in the reaction, on both sides, reactant and product, the same number of atoms that are on the reactants side must be on the products side. Therefore, the best answer for this question will be letter D

The concentration of Ca(OH)2 in the solution is approximately 1.33 x 10^(-6) M.

To find the concentration of Ca(OH)2 in a solution with a pH of 8.57, we need to use the concept of pOH, which is the negative logarithm of the hydroxide ion concentration ([OH-]). The pOH can be calculated by subtracting the pH from 14, which gives us 14 - 8.57 = 5.43.

Since Ca(OH)2 produces two OH- ions for every molecule of Ca(OH)2 that dissolves, the concentration of OH- ions will be twice the concentration of Ca(OH)2. Thus, we have [OH-] = 2x, where x represents the concentration of Ca(OH)2.

Taking the antilogarithm of the pOH, we find that [OH-] = 10^(-pOH) = 10^(-5.43).

Since [OH-] = 2x, we can write 2x = 10^(-5.43) and solve for x.

x = (10^(-5.43))/2 ≈ 1.33 x 10^(-6) M

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The acetic acid/acetate buffer system consists of a weak acid (acetic acid, CH3COOH) and its conjugate base (acetate ion, CH3COO-). When a base is added to the buffer system, the following process occurs to neutralize it:

1. The base reacts with the weak acid (acetic acid) in the buffer system to form its conjugate base (acetate ion) and water. For example, if a hydroxide ion (OH-) is added, it reacts with acetic acid as follows:

  OH- + CH3COOH → CH3COO- + H2O

2. The conjugate base (acetate ion) that is formed acts as a reservoir for hydrogen ions (H+). It can accept hydrogen ions from the solution if the pH increases. This helps to maintain the pH of the buffer system within a certain range.

3. The buffer system resists large changes in pH because the equilibrium between the weak acid and its conjugate base is shifted to maintain a relatively constant concentration of both species. This allows the system to neutralize the added base and maintain its acidic nature.

The acetic acid/acetate buffer system neutralizes an added base by reacting with it to form the conjugate base and water, and by utilizing the conjugate base to accept hydrogen ions and maintain the pH of the system.

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In your gas sample, there are approximately 1.21 moles of gas.

To determine the number of moles of gas in the sample, you can use the ideal gas law formula: PV = nRT. In this formula, P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant (0.0821 L atm/mol K), and T is the temperature in Kelvin.

1. Convert the pressure to atm: (1663 mmHg) * (1 atm/760 mmHg) = 2.19 atm.

2. Convert the temperature to Kelvin: (83°C) + 273.15 = 356.15 K.

3. Rearrange the formula to solve for n: n = PV/RT.

4. Plug in the values: n = (2.19 atm) * (22.4 L) / (0.0821 L atm/mol K) * (356.15 K).

5. Calculate the number of moles: n = 1.21 moles (rounded to two decimal places).

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To determine if the internal energy of a system increases or decreases, we usually analyze changes in its temperature, volume, or pressure. If the temperature rises, it signifies an increase in internal energy, and vice versa.

The diagram in question represents a decrease in the internal energy of the system. This is because the final state of the system is at a lower energy level than the initial state. In terms of the absence of work associated with the process, it is important to note that the change in internal energy of a system is determined by the heat added to or removed from the system. If there is no work involved in the process, then the heat transferred must be the only factor contributing to the change in internal energy. Therefore, if heat is added to the system, it is endothermic as the internal energy of the system increases, whereas if heat is removed from the system, it is exothermic as the internal energy of the system decreases.

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The separation scheme for the isolation of caffeine from the ground tablets include the steps: Grinding, Extraction, Filtration, Evaporation, Purification, Recrystallization and Drying.

Here is a detailed separation scheme for the isolation of caffeine from ground tablets. Here is a step-by-step procedure:

Grinding: Grind the tablets containing caffeine to a fine powder to increase the surface area for extraction.

Extraction: Perform multiple extractions using a suitable solvent, such as ethyl acetate or dichloromethane. Add the solvent to the powdered tablets and mix thoroughly. Allow the mixture to stand for some time to allow the solvent to dissolve the caffeine.

Filtration: Filter the mixture to separate the solid residue (containing excipients and impurities) from the solvent extract (containing caffeine).

Evaporation: Evaporate the solvent from the filtrate using a rotary evaporator or by allowing it to evaporate naturally. This will leave behind a crude caffeine residue.

Purification: Dissolve the crude caffeine residue in a minimal amount of a suitable solvent, such as hot water or ethanol. Filter the solution if necessary to remove any remaining insoluble impurities.

Recrystallization: Slowly cool the filtered solution to induce crystallization of pure caffeine. Collect the formed crystals by filtration and wash them with a small amount of ice-cold solvent to remove any impurities.

Drying: Allow the purified caffeine crystals to air dry or use a desiccator to remove any remaining moisture.

The resulting product should be relatively pure caffeine. Please note that this is a simplified outline, and specific details may vary depending on the specific extraction and purification techniques used.

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Answer:

[OH-] = 2 x 10^-6 M

Explanation:

Calculate pOH first: 14 - pH = pOH --> pH = 14 - 8.3 = 5.7

[OH-] = 10^-pOH = 10^-5.7 = 2 x 10^-6 M

Only one sig fig in the concentration, because the pH only had one decimal place.

Formaldehyde is used industrially to make polymers, insulating materials and carpeting. So the correct option is (d) all of these .

Carbon, hydrogen, and oxygen make up the compound known as formaldehyde. Every biological system, including humans, animals, and plants, contains it naturally. A pungent, colourless gas called formaldehyde is a component of numerous household goods and building materials.

Formaldehyde is used in glues and adhesives, permanent-press fabrics, paper product coatings, pressed-wood products like particleboard, plywood, and fiberboard, as well as glues and insulation materials.

Therefore, Formaldehyde is used industrially to make polymers, insulating materials and carpeting. So the correct option is (d) all of these.

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Plastid is the organelle that can the substance. chlorophyll that performs photosynthesis

Answer:

Explanation:

3

Significant figures are the number of digits that add to the correctness of a value, frequently a measurement. The following numbers are three significant digits 876000, 1.20 x 10⁵, and 8.77 x 10⁻⁴.

The number of significant single digits (0 to 9 inclusive) in the coefficient of expression in the scientific notation is referred to as "significant figures" (SF). The expression's number of significant figures reveals the engineer's or scientist's level of assurance or precision when expressing a quantity.

When a number is rounded off, its value is maintained but is brought closer to the next number, simplifying the number. The crucial figures are preserved when numbers are rounded off.

The following numbers are rounded off:

1. 876000

2. 1.20 x 10⁵

3. 8.77 x 10⁻⁴

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Someone kills most of the bacteria and other decomposers in a lake cycling of matter in the ecosystem then they break everything down

Decomposers are organism that breakdown dead or decaying organism they carried out decomposition and process possible by only certain kingdom such as fungi

Primary role of decomposers in ecosystem are the cycle matter by returning carbon and other matter to the ecosystem because they use oxygen in their breakdown process and at the end of the breakdown they return nutrient like carbon dioxide and nitrogen back to the ecosystem and they break everything down and when they breakdown the matter they are adding nutrient back into the earth and someone kill the bacteria and other decomposers in a lake then the cycling of matter would not go further and that's why total ecosystem get blown

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Answer:

C. The enthalpy of a reaction is the sum of the enthalpies of intermediate reactions.

Explanation:

The heat of any reaction  ΔH∘f  for a specific reaction is equal to the sum of the heats of reaction for any set of reactions which in sum are equivalent to the overall reaction.

Answer: The enthalpy of the reaction is -1791.31 kJ.

Explanation:

Enthalpy change is the difference between the enthalpies of products and the enthalpies of reactants each multiplied by its stoichiometric coefficients. It is represented by the symbol \(Delta H^o_{rxn}\)

\(\Delta H^o_{rxn}=\sum (n \times \Delta H^o_{products})-\sum (n \times \Delta H^o_{reactants})\)        .....(1)

For the given chemical reaction:

\(3MnO_2(s)+4Al(s)\rightarrow 2Al_2O_3(s)+3Mn(s)\)

The expression for the enthalpy change of the reaction will be:

\(\Delta H^o_{rxn}=[(2 \times \Delta H^o_f_{(Al_2O_3(s))}) + (3 \times \Delta H^o_f_{(Mn(s))})] - [(3 \times  \Delta H^o_f_{(MnO_2(s))}) + (4 \times \Delta H^o_f_{(Al(s))})]\)

Taking the standard heat of formation values:

\(\Delta H^o_f_{(Al_2O_3(s))}=-1675.7kJ/mol\\\Delta H^o_f_{(Al(s))}=0kJ/mol\\\Delta H^o_f_{(MnO_2(s))}=-520.03kJ/mol\\\Delta H^o_f_{(Mn(s))}=0kJ/mol\)

Plugging values in the above expression:

\(\Delta H^o_{rxn}=[(2 \times (-1675.7))+(3 \times 0)] - [(3 \times (-520.03))+(4 \times 0)]\\\\\Delta H^o_{rxn}=-1791.31 kJ\)

Hence, the enthalpy of the reaction is -1791.31 kJ.

Answer:

1.)C₃H₈O

2)OH

3.)1-propanol

1.) C4H8O

2.) C2H6O or CH3CH2OH

3.)Ethanol

Explanation:

Hope this help

Answer:

A. the earth’s tilt toward the sun

Explanation:

The most important factor in the changing of the seasons on the earth is the earth's tilt towards the sun.

This causes the differences in the amount of insolation which is incident on the earth surface. Throughout the year, as the earth continues to spin, it receives different amount of solar radiation all year round.

The sun is always overhead around the equator. Such regions of the world receives direct insolation and are mostly constrained to a wet and dry season.

Areas above the equator have the sun at an angle. The diffused sunlight present distinct seasons all year round.