In a closed system, there is 500 J of potential energy and 800 J of kinetic energy and no other forms of energy are present in this
system. Ten years later, the kinetic energy is measured at 300 J. After 10 years, the amount of potential energy is:
O 300 J.
O 800J.
O 500 J.
O 1000 J

The specimen at 100x zoom can be identified as an Animal cell as per the observations of it containing the cytoplasmic elements like the cytosol.

Organelles, cytoplasmic elements, the cytosol, and the cell membrane make up the normal structure of an animal cell.

Each of the cell's organelles is a membrane-bound structure with a specific function. Animal cells are the kind of typical eukaryotic cells because they have the presence of a membrane-bound nucleus and organelles and are encased in a plasma membrane.

Animal cells lack a cell wall, in contrast to eukaryotic cells found in plants and fungus. The building blocks of all living things in the kingdom Animalia are called animal cells.

They give bodies shape, take in nutrients to turn into energy, and aid in animal movement. They are also capable of self-replication and contain all an organism's genetic material.

The biggest organelle in animal cells is the nucleus. Cell activity is controlled by the nucleus. It also includes the chromosomes of the cell.

The genetic material (DNA) that makes you who you are is contained in the chromosomes.

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(a) Liquid is a state of matter and it has no finite shape due to the arrangement of its molecules.

(b) Ice is a solid state of mater while vapor is gaseous state of mater

(c) Gas molecules are always in constant motion with great kinetic energy, and can easily be ignited.

Liquid is a state of matter and it has no finite shape due to the arrangement of its molecules rather liquids assume the shape of their container.

Ice is a solid state of mater while vapor is gaseous state of mater. The molecules of the ice are closely packed together leading to its heavier weight when compared to vapors whose molecules are far from each other.

Gas molecules are always in constant motion with great kinetic energy, and can easily be ignited.

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Answer:

Explanation:

Explain why the name 1-propene is incorrect what is the proper name for this molecule

The name 1-propene is incorrect because;

The proper name for this molecule is;

Propene otherwise known as propylene is simply propane with a double bond at the first carbon.

When we get to the alkenes where the naming of organic compounds becomes more complex, the numbering system is used to indicate the position of the bonds.

With propene, there are three carbon atoms and the double bond will always appear in between two of the carbon atoms.

So, it is not important to use numbers to show that the carbon is at the first carbon. This becomes necessary from the next compound, butene, where there are more carbons.

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The mass of carbon in a 20.0 g sample of pure ammonium carbonate is 2.79 g. find that the mass of carbon in the sample is 2.79 g.

The formula for ammonium carbonate is (NH4)2CO3. The molar mass of carbon (C) is 12.01 g/mol. In (NH4)2CO3, there are two carbon atoms. The molar mass of (NH4)2CO3 is 96.09 g/mol. To find the mass of carbon, we can use the ratio of the molar masses.

\((2 × 12.01 g/mol) / 96.09 g/mol × 20.0 g = 2.79 g\)

By multiplying the ratio of the molar masses by the given mass of ammonium carbonate (20.0 g), we find that the mass of carbon in the sample is 2.79 g.

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In order to calculate the number average molar mass of poly(ethylene oxide), we need to know the degree of polymerization, which is the number of repeating units in the polymer chain.

Let's assume that the average degree of polymerization for poly(ethylene oxide) is n. Since each molecule has two hydroxyl end groups, we can write n = (total number of monomer units) / 2 The molecular weight of each monomer unit of ethylene oxide is 44.05 g/mol. Therefore, the molecular weight of the repeating unit in poly(ethylene oxide) is 44.05 g/mol. The number average molar mass is given by the formula Mn = (total mass of polymer) / (total number of polymer chains) Let's assume that we have a mass of 1 g of poly(ethylene oxide). The number of polymer chains is given by (total mass of polymer) / (average molecular weight of polymer) The average molecular weight of poly(ethylene oxide) is 44.05 x n Therefore,  the number of polymer chains is 1 g / (44.05 x n) g/mol = 0.0227 n The total mass of the polymer is 1 g, and each polymer chain has a mass of 44.05 x n g/mol Therefore, the number average molar mass is Mn = (1 g) / (0.0227 n) = 44.0 n So, if the degree of polymerization is, for example, 100, the number average molar mass would be, Mn = 44.0 x 100 = 4400 g/mol

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Answer:

1.48×10²⁴ Cu atoms

Explanation:

For this question you need to use Avogadro's number 6.022×10²³atoms.

2.45 moles of Cu ×\(\frac{6.022x10x^{23} atoms }{1 mole}\)= 1.47539×10²⁴ atoms.

The moles cancel out so you are left with atoms.

Since there are 3 significant figures in the question there should be 3 significant figures in your answer, which is 1.48×10²⁴ Cu atoms.

Answer:

I believe physical

Explanation:

If you step on the bag of chips, it would reduce them to crumbs. Wouldn't this be a physical change in the chips?

Answer:

physical change

Explanation:

when you step on a bag of chips they would be crushed so it would cause a physical change.

All of the options are true for the Na+/K+ exchange pump.  The sodium-potassium (Na+/K+) exchange pump is an important transmembrane protein found in animal cells.

It pumps sodium ions (Na+) out of the cell and potassium ions (K+) into the cell, against their concentration gradients, using the energy from ATP hydrolysis. This process helps to establish and maintain the resting membrane potential of the cell.

The following statements are true for the Na+/K+ exchange pump:

It is a transmembrane protein that spans the plasma membrane of animal cells.

It pumps three sodium ions out of the cell for every two potassium ions pumped into the cell.

It requires the hydrolysis of one molecule of ATP to transport these ions against their concentration gradients.

It helps to establish and maintain the resting membrane potential of the cell, which is important for many cellular processes such as signaling, transport, and metabolism.

Therefore, all of the options are true for the Na+/K+ exchange pump.

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It can be difficult to differentiate a system at equilibrium from a system containing a very slow chemical reaction.

It can be difficult to differentiate a system at equilibrium from a system containing a  very slow chemical reaction because the phase that moves slowly needs more time to complete because it may entail numerous other processes.

As an illustration, a reactant would need to diffuse as well as migrate to a certain reaction site before the next change can be implemented, which then immediately creates a product.

It can be challenging to distinguish an equilibrium system from one that has: Depending on the circumstances, a reversible reaction may only take place in one direction and the reverse reaction may not contribute much.

Equilibrium is influenced by the system's temperature, pressure, as well as concentration. When one of these variables changes, the system's equilibrium is upset and it returns to normal itself so that it reaches equilibrium again.

Therefore, It can be difficult to differentiate a system at equilibrium from a system containing a very slow chemical reaction.

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Answer:

water molecules

Explanation:

Osmosis is the movement of water molecules from a solution of higher concentration to a solution of lower concentration.

Hope it helps..

Answer:C: sulfur

Explanation:

Answer:

Explanation:

Reactants                                    Product

H = 2                                          H=2

Cl=2                                             Cl=2      

Zn=1                                            Zn=1    

Total number of atoms  5            Total number of atoms  5    

The molarity of the diluted solution is 1.67 M.

To find the molarity of the diluted solution, we need to calculate the amount of copper nitrate present in the initial solution and the final volume of the diluted solution. By dividing the amount of copper nitrate by the final volume, we can determine the molarity of the diluted solution.

First, calculate the amount of copper nitrate in the initial solution:

Amount of copper nitrate = volume of solution × molarity

Amount of copper nitrate = 0.750 L × 4.00 mol/L = 3.00 mol

Next, calculate the molarity of the diluted solution:

Molarity = amount of copper nitrate / final volume of solution

Molarity = 3.00 mol / 1.80 L = 1.67 M

To find the molarity of the diluted solution, we utilize the equation Molarity = moles of solute / volume of solution. In this case, the solute is copper nitrate (Cu(NO3)2), and the volume of the solution is given as 0.750 L.

We first calculate the amount of copper nitrate in the initial solution by multiplying the volume of the solution by the molarity: 0.750 L × 4.00 mol/L = 3.00 mol. This gives us the amount of copper nitrate present before dilution.

Next, we need to determine the final volume of the solution after dilution, which is given as 1.80 L.

Finally, we calculate the molarity of the diluted solution by dividing the amount of copper nitrate (3.00 mol) by the final volume (1.80 L): 3.00 mol / 1.80 L = 1.67 M. Therefore, the molarity of the diluted solution is 1.67 M.

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Answer:

15.8 m/s

Explanation:

v= u+at

v= 32+(-1.5×10.8)

v=32-16.2

v=15.8m/s

d) The concentration of carbonic acid will increase if the pressure of carbon dioxide is increased in the container.

According to Le Chatelier's principle, if the pressure of carbon dioxide is increased in the container, the system will shift in a direction that reduces the pressure. In this case, it means the equilibrium will shift towards the formation of more carbonic acid. The increase in pressure will cause more CO₂ molecules to dissolve in water, leading to an increase in the concentration of carbonic acid.

The reaction CO₂ + H₂O ⇌ H₂CO₃ is an equilibrium reaction, and changing the pressure affects the equilibrium position. By increasing the pressure of CO₂, the equilibrium will favor the formation of more carbonic acid to alleviate the increased pressure. Therefore, the concentration of carbonic acid will increase as a result of the increased CO₂ pressure. The other options (a, b, c, e) are not accurate as they do not take into account the impact of the increased CO₂ pressure on the equilibrium.

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The strength of steel increases with an increase in carbon content. The more carbon that is dissolved in iron, the less it will corrode and the stronger it will become. In general, the increase in carbon percentage increases tensile strength but reduces ductility and toughness.

Higher carbon content lowers steel's melting point and its temperature resistance, but increases its hardness and strength. Carbon also helps to reduce the size of iron crystals, which affects their physical characteristics by making them stronger and harder. The percentage of elongation will decrease as carbon content increases.

The reduction in percentage elongation is due to the fact that increasing carbon content causes steel to harden, which leads to a reduction in ductility. In general, steel with low carbon content has high ductility and elongation, while steel with high carbon content has low ductility and elongation.

As the carbon content increases, the percentage area reduction also decreases. This is because an increase in carbon content makes steel more brittle, which reduces its ability to deform without cracking. Carbon has a significant effect on the ductility of steel, reducing it as carbon content increases. As the carbon content increases, the steel becomes more brittle, making it more likely to crack or break under stress.

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Answer:

10g of water was vaporized by the 2.28K/J

Answer:

A. To be precise, it must be able to make measurements repeatedly over a long period of time.

Explanation:

The precision of a scientific measuring tool can be defined as how close the values between multiple measurements are to each other, when repeated under the same conditions.

This ultimately implies that, the precision of a scientific measuring tool reflects the reproducibility and repeatability of its measurements, irrespective of how accurate the measurements are.

In science, one of the most effective ways to determine the precision of a scientific measuring tool is to find the difference between the highest and lowest measurements (measured values).

Hence, the statement which correctly describes a characteristic that a scientific measuring tool should have is that, to be precise, it must be able to make measurements repeatedly over a long period of time.

Answer:

Freezing point of solution = -2.740C

Explanation:

The solution is attached herewith

The normal freezing point of an aqueous solution of C₁₂H₂₂O₁₁ is -1.26°C

The freezing point depression can be calculated using the formula:

ΔTf = i* Kf*m ; where

The molality of the aqueous solution of C₁₂H₂₂O₁₁ is first determined using the formula:

The mass of water is unknown but is determined from the mass of the solute and solution from the formula:

mass of solute = number of moles * molar mass

moles of solute in 1 L solution = 0.7439 moles

molar mass of solute, C₁₂H₂₂O₁₁ = 342.0 g/mol

mass of solute = 0.7439 moles * 342.0 g

mass of solute = 254.41 g

mass of solution = density * volume

volume of solution = 1 L = 1000 mL

mass of solution = 1.35g/ml * 1000 mL

mass of solution = 1350 g

Therefore, mass of solvent (water) = 1350 g - 254.41 g

mass of solvent (water) = 1095.59 g

mass of solvent (water) in kg = 1095.59 g * 1 kg/ 1000 g

mass of solvent (water) in kg = 1.0956Kg

Thus, molality of solution = 0.7439 moles / 1.0956 Kg

molality of solution = 0.679 mol/kg

The freezing point depression, ΔTf, is then determined using the formula: ΔTf = i* Kf*m

Since C₁₂H₂₂O₁₁ is a non-electrolyte; i for C₁₂H₂₂O₁₁ = 1

Kf of water = 1.86 kg/mole

m = 0.679 mol/kg

ΔTf = 1 * 1.86 * 0.679

ΔTf = 1.26 °C

Therefore, freezing point depression, ΔTf = 1.26 °C

normal freezing point of solution = freezing point of water - freezing point depression

normal freezing point of solution = 0.0°C - 1.26°C

normal freezing point of solution = -1.26°C

Therefore, the normal freezing point of an aqueous solution of C₁₂H₂₂O₁₁ is -1.26°C

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Answer:

2.439 x 10E24 atoms

Explanation:

from

N=n x NA where

N- number of atoms

n-number of moles and NA is the avogadro's number

Option (b) K + Br₂  → 2KBr is the chemical reaction that does not follow the law of conservation of mass.

According to the law of conservation of mass or principle of mass conservation in physics and chemistry, any system that is closed to all transfers of matter and energy must have a constant mass over time because the mass of the system cannot change, meaning that neither more nor less of the quantity can be added or taken away.

The Law of Conservation of Mass has been in force ever since Antoine Lavoisier discovered that mass is neither created nor destroyed during chemical reactions. For instance, the carbon atom in coal burns and becomes carbon dioxide. Although the carbon atom's shape changes from solid to gas, its mass remains constant.

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Answer:

Speed

Explanation:

Motion can be represented by a distance-time graph, which plots distance on the y-axis and time on the x-axis. The slope of a distance-time graph represents speed. The steeper the slope is, the faster the speed.

Hope this helps!:)

Answer:

hi... so I can help you but just please translate to English so I can help

Answer:

113 g NaCl

Explanation:

The Ideal Gas Law equation is:

PV = nRT

In this equation,

    > P = pressure (atm)

    > V = volume (L)

    > n = number of moles

    > R = 8.314 (constant)

    > T = temperature (K)

The given values all have to due with the conditions fo F₂. You have been given values for all of the variables but moles F₂. Therefore, to find moles F₂, plug each of the values into the Ideal Gas Law equation and simplify.

(1.50 atm)(15.0 L) = n(8.314)(280. K)

2250 = n(2327.92)

0.967 moles F₂ = n

Using the Ideal Gas Law, we determined that the moles of F₂ is 0.967 moles. Now, to find the mass of NaCl that can react with F₂, you need to (1) convert moles F₂ to moles NaCl (via the mole-to-mole ratio using the reaction coefficients) and then (2) convert moles NaCl to grams NaCl (via molar mass from periodic table). It is important to arrange the ratios/conversions in a way that allows for the cancellation of units (the desired unit should be in the numerator).

1 F₂ + 2 NaCl ---> Cl₂ + 2NaF

Molar Mass (NaCl): 22.99 g/mol + 35.45 g/mol

Molar Mass (NaCl): 58.44 g/mol

0.967 moles F₂        2 moles NaCl             58.44 g
----------------------  x  -----------------------  x  -----------------------  =  113 g NaCl
                                     1 mole F₂              1 mole NaCl

The correct options that identify the abbreviation for cell potential and its units are:- E° and volts (V).

The abbreviation for cell potential is E°, where the superscript zero denotes standard conditions of temperature (298 K) and pressure (1 bar). The units of cell potential are volts (V) or millivolts (mV).
The abbreviation for cell potential is E° (also referred to as standard electrode potential). Its units are expressed in volts (V). The cell potential represents the difference in electrical potential between the two electrodes of an electrochemical cell, and it is a crucial factor in determining the feasibility and spontaneity of a redox reaction. Selecting the correct options involving E° and volts (V) would be the accurate choice.

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a) The statement "Bοth equatiοn l and ll are balanced, but Equatiοn II is the cοrrect way tο write the balanced equatiοn" is true.

B) Dividing Equatiοn II by a factοr wοuld change the ratiο and the meaning οf the equatiοn.

C)  The mοst impοrtant idea is tο ensure that an equatiοn is balanced and the reactants and prοducts are cοrrectly identified and listed.

A divisiοn equatiοn has a label fοr each cοmpοnent. The dividend, the fractiοn, and the sum are the three key terms. pay οut - The amοunt yοu are splitting up is the pay οut. The amοunt yοu are splitting by is knοwn as the divisοr Quοtient.

Tο οbtain Equatiοn II frοm Equatiοn I, we need tο reverse and multiply Equatiοn I by 2:

I: 2 SnO2 + 4 H2 → 2 Sn + 4 H2O

II: SnO2 + 2 H2 → Sn + 2 H2O

a) The statement "Bοth equatiοn l and ll are balanced, but Equatiοn II is the cοrrect way tο write the balanced equatiοn" is true.

b) Nο, we cannοt divide Equatiοn II by anοther factοr and still have it be cοrrect because the cοefficients in a balanced chemical equatiοn must represent the smallest whοle number ratiο οf the reactants and prοducts. Dividing any cοefficient by a factοr wοuld change the ratiο and thus change the meaning οf the equatiοn.

c) One methοd tο determine if an equatiοn is written in the cοrrect way is tο ensure that the equatiοn is balanced, meaning that the number οf atοms οf each element is equal οn bοth sides οf the equatiοn. Additiοnally, the cοefficients shοuld represent the smallest whοle number ratiο οf the reactants and prοducts, and the reactants and prοducts shοuld be cοrrectly identified and listed in the prοper οrder.

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Answer:

Explanation:

Building bricks deteriorate overtime due to chemical weathering from moisture constantly in contact with it overtime, as well temperature changes. Their topmost layers leach after continuous attack, and are eroded. thereby causing them to break away most times.

This cycle takes place overtime and is not a quick action.

I hope this is easy to understand.

Answer:

The type of bonding that occurs between metals and non metals is ionic bonding,so the type of bond between Na and Br is an ionic bond