if i raise a 2 kg book 0.8m over my head determine the amount of work that i have done

Answer:

Volume occupied is approx.  

38 ⋅ ML

Explanation:

Density  ρ = Mass  Volume  And thus  Volume  = Mass  ρ = 1.592 ⋅ l b × 454 ⋅ g ⋅ l b − 1 19.3 ⋅ g ⋅ m L − 1   =   ? ? ⋅ m L

Answer:

Molarity=number of moles÷volume(L)

Combustion can be defined as the reaction of a compound with oxygen. The enthalpy of combustion of octane is \(\Delta H_{\rm rxn}\) for \(\rm C_8H_{18}\;+\;25\;O_2\;\rightarrow 8\;CO_2\;+\;9\;H_2O\).

The enthalpy of reaction is the amount of heat energy absorbed or lost by the molecules in the chemical reaction.

The enthalpy of combustion is the amount of heat energy released by the compound in the reaction with oxygen.

The reaction in which heat is liberated with the reaction of a compound with oxygen has an enthalpy of combustion, equivalent to the enthalpy of reaction.

The combustion of octane can be given as:

\(\rm C_8H_{18}\;+\;25\;O_2\;\rightarrow 8\;CO_2\;+\;9\;H_2O\)

Thus, the reaction has combustion energy equivalent to the enthalpy of the reaction is \(\rm C_8H_{18}\;+\;25\;O_2\;\rightarrow 8\;CO_2\;+\;9\;H_2O\). Thus, option B is correct.

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Phosphoric acid cannot be determined by titration with NaOH using either phenolphthalein or methyl orange indicator because of the presence of multiple dissociation stages in the acid. As a result, the equivalence point cannot be determined accurately.

This is due to the fact that the acid has three dissociation stages. Phosphoric acid (H3PO4) is an example of a polyprotic acid, which means that it has more than one hydrogen ion to donate.

The acid undergoes successive ionization to form H2PO4-, HPO42-, and PO43- ions. The stepwise dissociation reactions are as follows: H3PO4(aq) + H2O(l) → H2PO4-(aq) + H3O+(aq)Ka1 = 7.5 × 10-3H2PO4-(aq) + H2O(l) → HPO42-(aq) + H3O+(aq)Ka2 = 6.2 × 10-8HPO42-(aq) + H2O(l) → PO43-(aq) + H3O+(aq)Ka3 = 4.2 × 10-13

As a result, the pH of the solution after each addition of NaOH will change in a series of steps rather than a single sharp change. As a result, it is impossible to determine the exact equivalence point using either phenolphthalein or methyl orange indicator.

Therefore, it is not possible to determine the amount of phosphoric acid in a solution using the titration method with these indicators.

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Answer:

400 mL

Explanation:

\(0.400 L(\frac{1000mL}{1L} )=400mL\)

Chemical reactions cause the bonds between the atoms in the reactants to rearrange to create new compounds , but no atoms vanish or are created.

Chemical equations are symbolic depictions of chemical reactions where the reactants and products are stated in terms of their respective chemical formulae.

A molecule changes into a different chemical species when light causes it to rearrange its structure, losing atoms in the process. The transformation of 7-dehydrocholesterol to vitamin D in the skin is one biologically significant photorearrangement event.

In a chemical reaction, reactants combine to generate products (new substances). The molecules' bonds break when energy is absorbed in the process, and they then reorganize to make new bonds.

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it's 500kg

Explanation:

I did this I hope this helps

The four elements make up the bulk of all living things are hydrogen, carbon, oxygen and the nitrogen. they make up the human body of about 96 %.

The 25 elements are most important for the life. the four most important are present in about 96 % are :

the some of the elements are present in about 3.5 % are : calcium, phosphorus, potassium, sulfur, sodium , chlorine and magnesium . the rest are present in the trace amount about 0.5 %. oxygen is the most common element present in the human body. carbon is versatile element which can make the bond by itself.

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Answer:pruducts Explanation:

Answer:

The Reactants

Explanation:

A P E X

Answer:

hot

Explanation:

Answer:

2AlCl₃ ⇒ 2Al + 3Cl₂

Explanation:

Balance the equation–making sure there's an equal amount of reactants and products on both sides.

Answer:

1. Gases may be compressed

2. Gases expand when less pressure is applied.

3. Gases can be mixed.

4. Gases exert a constant pressure on its container walls.

5. Gases have low densities.

The answers include the following:

This is referred to as the different types of methods which could be natural or artificial and employs the removal of excess water from a certain area or place.

Water in homes is drained through larger pipes which carry it into collection systems so as to prevent the risk of pollution and contamination of other areas.

Grey water path doesn't involve wastewater from the toilet while the black water comes from only the toilet which is why they were chosen as the correct choice.

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Answer:

25.91 L

Explanation:

P1V1= P2V2

748 (26.5) =  765 ( V2)      V2 = 25.91 LITERS  

The statement "Sodium balance and water balance are closely related; chloride levels are closely associated with changes in sodium levels" is true because sodium balance and water balance in the body are closely interconnected.

Sodium is an essential electrolyte that plays a crucial role in maintaining fluid balance. When there is a change in sodium levels, it can lead to alterations in water balance within the body. This is because sodium helps regulate the movement of water across cell membranes, affecting the overall distribution of fluids.

Chloride, another electrolyte, is closely associated with sodium levels. Chloride ions often accompany sodium ions in various physiological processes. Changes in sodium levels can impact chloride levels, and vice versa. Therefore, chloride levels are closely linked to alterations in sodium levels, further emphasizing the relationship between sodium balance and water balance in the body.

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Answer:

6. Mutalism

7. Commensalism

Explanation:

6- Both species benefit = (mutualism).

7- Commensalism is an association between two organisms in which one benefits and the other derives neither benefit nor harm.

Answer:

6: C. Parasitism

7: B. Commensalism

Explanation:

6: Here the flea gets its nutrients from the mouse's blood and the flea benifits from the expense of the mouse.

7: Commensalism is a type of relationship between two living organisms in which one organism benefits from the other without harming it

The 4 quantum numbers of the last electron is n = 4

l = 0

m = 0

s = +1/2.

The given atom (+2) has 29 protons; therefore, it is a copper atom (Cu) with an atomic number of 29. The last electron in the configuration of the copper atom would be located in the 4s orbital of the fourth energy level. The quantum numbers of this electron are as follows:

Principal quantum number (n) = 4

Azimuthal quantum number (l) = 0

Magnetic quantum number (m) = 0

Spin quantum number (s) = +1/2

Therefore, the four quantum numbers of the last electron in the configuration of a charged copper atom (+2), with 29 protons, are:

n = 4

l = 0

m = 0

s = +1/2.

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Answer with Explanation:

You can determine if the object will float or sink by finding out its "density." You can get the density of the solid object by dividing its "mass" by its "volume." If its density is less than the density of the liquid, then it will "float." However, if its density is more than the density of the liquid, then it will "sink."

This means that it is also important to know the liquid's density because you will be comparing it to the density of the solid object. For example, the density of water is 1 g/\(m^{3}\). No matter the volume of the substance, the density is always the same.

The main differences in the synthesis of purine and pyrimidine nucleotides -

What are 2 differences between purine and pyrimidine?

What are the structural differences among purines and pyrimidines in DNA and RNA?

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☆<《 HOPE IT WILL HELP YOU 》>☆

Explanation:

The transition zoneis the part of Earth's mental. It is located between the lower mental and upper mental. It is between the depth of 410km TO 660km

Answer:

It's water.

Explanation:

Water is also called as universal solvent, because it's literally almost the only one we use.

Sorry if I spelled something wrong. I'm Dominican so yeah . I hope this helps you :)

The closest to the partial pressure of O₂ after the system has reached equilibrium is 0.5 atm, because K is very large, nearly all the SO₂ is consumed before the system reaches equilibrium, but an excess amount of O₂  remains at equilibrium. the correct answer is B.

Chemical equilibrium is the condition in which the concentrations of the reactants and products are equal and have no further tendency to fluctuate over time, with no discernible change in the features of the system.

The equilibrium moves to the side of the reaction where there are less moles of gas as the pressure increases. When the pressure decreases, the equilibrium moves to favor the reaction that produces more gas molecules.

Partial pressure is inversely proportional to volume, according to the ideal gas law. Additionally, it correlates with both the temperature and the amount of moles.

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Answer:

The empirical formula simply states the ratios of the elements that make up the molecule, while molecular formulas specify the amounts of each element exactly, not just giving the ratio. Let's take ethane (C2H6) as an example.

Answer:

Radiant energy to chemical energy

Explanation:

Got it right on edge 2021

One energy transformation that is taking place in the photosynthesis process is radiant energy to chemical energy.

Energy transformation is the process in which one form of energy converted into another form of energy.

Photosynthesis process is defined as the process in which plants makes their own food by using the carbon dioxide, water and sunlight in the chlorophyll.

The balanced chemical equation of photosynthesis process is

6CO2 + 6H2O → C6H12O6 + 6O2.

Since, it have 6 atoms of carbon, 12 atoms of hydrogen and 18 atoms of oxygen on both side. So, it is balanced.

Since, sunlight which it take is in the form of radiant and convert it into chemical energy.

Thus, we concluded that the energy transformation that is taking place in the photosynthesis process is radiant energy to chemical energy.

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Answer:

Island arcs hot spot.

Explanation:

las cadenas de islas volcánicas son conocidas como Cinturón de Fuego del Pacífico

esperó que te sirva marcarme como mejor respuesta

Metal carbonyls are characterized as volatile, low-melting-point compounds. They are created from the compound Mx(Co)y, which upon heating breaks down into metal and carbon monoxide. Contact with the skin can make them toxic.

In some cases, such as in nickel tetracarbonyl (Ni(CO)4), these complexes are homoleptic and only contain CO ligands, but more frequently, metal carbonyls are heteroleptic and contain a variety of ligands. Mononuclear metal carbonyls have a single metal atom at their core.

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Answer:

In physics, action is an attribute of the dynamics of a physical system from which the equations of motion of the system can be derived through the principle of stationary action. ... Action has dimensions of energy⋅time or momentum⋅length, and its SI unit is joule-second.

Explanation:

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Answer:

Action is an attribute of the dynamics of a physical system from which the equations of motion of the system can be derived through the principle of stationary action.

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:

106 gfm

Explanation:

element. number masses

Na. 2 23×2

C. 1. 12

O. 3. 16×3

then add

106 gfm