KCIO3>KCI +O2
a) When 62.0 g of Potassium chlorate are reacted/how hany Hioles of KCl will beformed?
b) How many molecules of O2 are produced from 2.85 g of KClO3?
c) 3.54 g of oxygen was produced.How many grams of potassium chlorate wereused?

Answers

Answer 1

a) The number of moles of KCl formed is 0.51 moles.

b) The number of molecules of KCl is 1.38 * 10^22 molecules.

c) The mass of the potassium chlorate 8.94 g.

What is the amount of KCl formed?

We know that we can be able to use the stoichiometry of the reaction to be able to find the amount of the KCl that is formed. The first step is to write down the reaction equation as it has been shown;

[tex]2KClO_{3} ----- > 2KCl + 3O_{2}[/tex].

We can see that we can be able to apply the principles of stoichiometry as stated earlier.

a) Number of moles of the potassium chlorate = 62 g/122.55 g/mol

= 0.51 moles

Then we have the number of the moles of the KCl as 0.51 moles.

b) Number of moles of the potassium chlorate =  2.85 g/122.55 g/mol

= 0.023 moles

If 2 moles of potassium chlorate produces 2 moles of KCl then 0.023 moles produces 0.023 moles of KCl.

Number of molecules of KCl = 0.023 moles * 6.02 * 10^23

= 1.38 * 10^22 molecules

c) If the number of moles of oxygen is; 3.54 g/32 g/mol = 0.11 moles

If 2 moles of potassium chlorate produces 3 moles of oxygen

x moles of potassium chlorate produces  0.11 moles

x = 2 * 0.11/3

= 0.073 moles

Mass of the potassium chlorate =  0.073 moles * 122.55 g/mol

= 8.94 g

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Related Questions

put the buning metal into a circible and collect the product. this sentence change into past passive​

Answers

I put the burning metal into a crucible and then collected the product.

Two cars, one of them is two time as heavy as the other, move down a hill at the same constant speed. Compared to the lighter car, the kinetic energy of the heavier car is ____ as much
half
equal
four times
twice ​

Answers

Answer:

twice

Explanation:

how many of the following molecules possess dipole moments? bh3, ch4, pcl5, h2o, hf, h2

Answers

BH3,CH4,PCl5,and H2 have zero dipole moment whereas the H2O and HF have permanent dipole moment.

what is dipole moment?

The bond dipole moment is the moments but property of the chemical bond that is used to measure the polarity of the bond within a molecule.

BH3 a non-polar molecule owing to its symmetric structure.

CH4 forms a regular tetrahedral structure and has very small electronegativity difference between the atoms that cancels out each other due to their directional vectors. Thus CH4 is non polar.

PCl5 is made up of polar P−Cl bonds that form a trigonal bipyramidal molecular which is arranged symmetrically thus the PCl5 molecule is nonpolar.

H2O is a polar compound with a bent shape, which is the reason for the polarity of the compound.

HF is a polar molecule owing to higher electronegativity difference and no other bonds to cancel the polarity thus formed.

H2 is a diatomic molecule and hence it is non-polar.

Thus, the atoms that possess dipole moments are H2O,HF .

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What process is represented by this redox equation?
-
6H20 + 6CO2
C6H1206 +602
A. Cellular respiration
B. Rusting
C. Photosynthesis
D. Combustion

Answers

The process that is represented by this redox equation

6 H₂O + 6 CO₂ --->  C₆H₁₂O₆ + 6 O₂ is  photosynthesis.

The correct option is C.

What is a redox reaction?

A redox reaction is a reaction in which oxidation and reduction occur simultaneously at the same time and to the same extent.

In a redox reaction, electrons are transferred from one species to another.

The species that transferred electrons becomes oxidized whereas the species that accepts electrons becomes reduced.

Hence, a reduction reaction is a reaction in which a chemical species accepts electrons while an oxidation reaction is a reaction in which a chemical species donates electrons.

Considering the given reaction:

6 H₂O + 6 CO₂ --->  C₆H₁₂O₆ + 6 O₂

In the given reaction, carbon is reduced while oxygen is oxidized.

The reaction shows the process of photosynthesis where carbon dioxide is reduced to produce glucose.

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the combustion of g benzoic acid increases the temperature of a bomb calorimeter by . calculate the heat capacity of this calorimeter.

Answers

With this method, a sample is burned in a bomb calorimeter at a constant volume. Equation q = -CT, where C is the calorimeter's heat capacity and T is the temperature change, can be used to determine how much heat is released during the reaction.

If 1.000 g of benzoic acid burns in a bomb calorimeter to produce 26.38 kJ of heat, 0.550 g of benzoic acid will produce the following amount of heat:Conventionally, heat release is denoted by a negative sign.The sum of the heat emitted by combustion (Qc) and the heat absorbed by the bomb calorimeter (Qb) equals zero, according to the Law of Conservation of Energy.

The temperature of the bomb calorimeter rose from 22.01 °C to 24.27 °C after absorbing 14.5 kJ. Using the following expression, we can determine the calorimeter's (C) heat capacity.

In a bomb calorimeter, the combustion of 0.550 g of benzoic acid raises the temperature from 22.01 °C to 24.27 °C.

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what volume of oxygen is produced at stp when 6.58 x 1024 molecules of water is decomposed according to the following reaction?

Answers

122 L of oxygen is produced at STP when water is decomposed to the reactants. here decomposition reaction occurs.

Decomposition Reaction is the process or effect of simplifying a single chemical entity into two or more fragments. Chemical decomposition is usually regarded and defined as the exact opposite of chemical synthesis. Decomposition reaction of water can be written as,

        2H2O  → 2H2 + O2

Oxygen is produced at STP when 6.58 x 1024 molecules of water is decomposed. So there will be,

      0.5 × 6.58 × 1024

     = 3.29 × 1024  O2 molecules.

1mole = 6.02×1023 particles, so the amount produced is:

     = 3.29×1024 / 6.02×1023

     = 5.47mole

At an STP of 273K, 1atm the volume is 22.4L/mole

So the volume of oxygen is 5.47 × 22.4 = 122L

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what is one possible problem from regenerating a greensand bed by adding a higher dosage of potassium permanganate?

Answers

The chemical element KMnO4 is the same as potassium permanganate. Manganese is in the +7 oxidation state in this salt. The salt is also referred to as "potash permanganate." The ion of permanganate is a potent oxidizer.

Another popular technique for treating water to remove sulfur is manganese greensand. It is often advised for water with less hydrogen sulfide than 6.0 mg/l. A unique coating on a manganese greensand filter causes hydrogen sulfide gas to oxidize into solid sulfur particles, which are then filtered. Potassium permanganate is used to rejuvenate the greensand after all of the manganese oxide has been used up. Potassium permanganate is a purple oxidizing chemical that is added to the untreated water to maintain the manganese greensand filter.

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what is the [oh−], [h+], ph, poh of 0.75 m ba(oh)2?

Answers

There will be twice quite so many OH ions as Ba(OH)2 molecules, with an OH- concentration of 1.5 M near the end.

Barium hydroxide, also known as baryta, has the formula Ba(OH)2. There is no odour to this clear white powder. It is naturally poisonous. It is ionic in nature; for example, in aqueous solution, Ba(OH)2 could provide two hydroxide ions for every molecule.

Given,

[Ba(OH)2] = 0.75 M

To find,

[H⁺] = ?

[OH⁻] = ?

pH = ?

pOH = ?

1. Identify the [H+]

If [H+] equals [Ba(OH)2, then [H+] = 10^13.8 = 1.58 M.

2. Calculate the pOH

pOH = - log[OH]

Substitution

pOH = - log(1.5)

Result

pOH  = 0.17

3.- Calculate the pH

Formula

pH + pOH = 14

Find a solution for pH

pH = 14 - 0.17

Result

pH = 13.8.

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Which of the following statements about the nucleus is true?

Answers

Answer:

The nucleus is surrounded by a double unit membrane from all sites. The chromosomes and genes which have genetical characters and transmit from one generation to another are found in the nucleus.

Explanation:

which theory was proposed by kurt lewin and emphasizes the reaction of an object is the result of all the forces acting upon said object?

Answers

Kurt Lewin's theory that emphasizes the reaction of an object is the result of the forces acting upon it is the field theory.

The field theory is a psychological theory that examines the patterns of interaction between the individual and their environment. The concept was developed by Kurt Lewin in the 1940s. According to the theory, an action of the person or a change in the environment that resulted by said action can be considered behavior.

The field theory emphasized the importance of individual personalities, situational variables, and interpersonal conflict. An object's reaction is the result of all the forces that has been acting upon said object.

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if the two different types of hydrogen atoms were equally reactive, what ratio of 1-chloropropane to 2-chloropropane would we expect as monochlorination products?

Answers

It is crucial to be able to extend out a line diagram to a condensed formula, therefore the first step in this process.

The next step is to begin sketching the various scenarios as we switch out one hydrogen on a propane cylinder for a chlorine atom. It should be obvious that there are only two options for chlorinating propane: C-1 or C-2 (chlorination at C-3 would give the same product as that at C-1).

Monochlorination means the addition of a chlorine atom. When chlorine atom is added to the below structure. Chlorine will substitute at one of the hydrogens.

Constitutional isomers of these two substances are 1-chloropropane and 2-chloropropane.

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how many moles of naoh are contained in 15.2l of a 0.205m naoh solution? multiple choice 125 moles naoh 0.0134 moles naoh 3.12 moles naoh 74.1 moles naoh 0.0779 moles naoh

Answers

3.12 moles NaOH  are contained in 15.2l of a 0.205m NaOH solution

15.2 x 0.205 = 3.116 moles. By rearranging the equation, you must first determine how many moles are there in this solution. False. Molarity (M) x Volume (L) equals 15.2 x.205, or 3.12 moles.

Molarity (M), which is determined by dividing the solute's mass in moles by the volume of the NaOH  solution in liters, is the most often used unit to represent NaOH solution concentration: liters of solution/moles of solute equals M. One liter of a NaOH  solution with a 1.00 molar concentration (1.00 M) contains 1.00 moles of solute.

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identify the stage in star life cycle in which hydrogen is the primary fuel for nuclear fusion?

Answers

The stage in star life cycle  in which hydrogen is the primary fuel for nuclear fusion is Main sequence.

The same natural cycles that apply to living things also apply to stars. This cycle starts with birth, develops over the course of a lifespan marked by change and growth, and culminates in death. The life cycle of a star, which lasts for billions of years, is completely different from the life cycle of a living thing.

What is Main sequence stage of the star life cycle ?

When the core temperature reaches the necessary level, fusion can start during the main sequence phase of development. The hydrogen protons undergo this transformation into helium atoms. An enormous quantity of energy is released from the core of a main-sequence star as a result of this exothermic reaction, which produces more heat than it consumes.

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What makes a nuclear reaction a transmutation?

Answers

Any process that modifies the number of protons or neutrons in an atom's nucleus is considered a nuclear transmutation. Therefore, modification in the number of protons or neutrons in an atom's nucleus is considered a nuclear transmutation.

What is nuclear reaction?

When two nuclei or a nucleus and an outside subatomic particle meet, it is known as a nuclear reaction and one or more new nuclides are created.

Nuclear reactions, where a nucleus and an outside particle interact, or radioactive decay, where no outside cause is required, can both result in a transmutation.

Therefore, modification in the number of protons or neutrons in an atom's nucleus is considered a nuclear transmutation.

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it takes 16 min for a 10 ml sample of an unknown gas to effuse thtogh a pinhole. a 10 ml sample of he required 5 min. what is the molecular weight of the gas?

Answers

The molecular size of something like the unidentified molecule is 44.1 since it is calculated as earth's weight metric kilogram of the electrons needed to make one molecule per mole. Molar mass is expressed in grams for mole.

What is the name for molecular weight?

Molecular weight, commonly known as molecular mass, is the concentration of a particular chemical molecules, calculated using the atomic weight of carbon-12, which is 12. In actuality, it is determined by adding the atoms' atomic weights.

How do physical properties and chemical weight compare?

Additionally, the primary distinction between the two is whether mole ratio provides the amount of a mole of a certain material. In contrast, molecular weight refers to a substance's molecule's mass. Although number of moles has a separate definition and measurement system

Briefing:

rate = distance / time

let consider both travelled a distance d.

So,  rate of Unknown gas   = d / 16.6 min

       rate of  He  = d / 5.00 min

  From Grahams law of effusion,

     rate1(Unknown gas ) / rate 2 (He) = √ MW 2 (He) / MW1 (Unknown) , MW = molecular weight

(d / 16.6 min) / (d / 5.00 min) = √ MW (He) / MW(Unknown)

0.301 = √ MW (He) / MW(Unknown)

(0.301)² = MW (He) / MW(Unknown)

 MW(Unknown) = MW(He)  / (0.301)²

                          = 4 / (0.301)²

                          = 44.1

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Write balanced net ionic equation for the following reaction: Fe(OH)3(s) + H2SO4(aq) +? Express your answer as a chemical equation. Identify all of the phases in your answer

Answers

The balanced net ionic equation is as follows;

                          Fe(OH)₃ + H₂SO₄---> Fe₂(SO₄)₃+ H₂O

The transformations that take place as a result of a chemical reaction are represented by an equation called a chemical equation. The following is the standard format for a chemical equation:

Reactants -----> Products

One example of a straightforward chemical reaction is the formation of water through the combination of hydrogen (H₂) and oxygen (O₂) in the atmosphere (H₂O). Hydrogen and oxygen are the reactants in this reaction, and the result of the reaction is water. In order to create the chemical equation for this reaction, you would first start by writing the reactants on the left and the product on the right, with an arrow connecting the two to represent the direction in which the reaction occurs.

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calculate the ph of the resulting solution if 25.0 ml of 0.250 m hcl(aq) is added to 35.0 ml of 0.250 m naoh(aq)

Answers

The pOH of the resulting solution is 1.38 as the resulting solution is basic in nature.

M HCl= 0.250 M

M NaOH= 0.250 M

V HCl=25.0 ml

V NaOH=35.0 ml

In order to calculate the pOH of the solution,

M mix= 0.250x25*0.250x35/25+35

M mix=6.25-8.75/60

=2.5/60

=0.0416 M

The solution will be more basic as the milliequivalent of the base is more., thus calculate pOH.

pOH or potential of hydroxide ion is a scale used to determine the hydroxide ion (OH–) concentration in a solution.

[OH-]=Mxnx∝

[OH-]=0.04167x1x1

[OH-]=0.04167 M

pOH=-log[OH-]

pOH=-log 4.167x10^-2

pOH=2-log 4.167

pOH=2-0.62

pOH=1.38

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HELP ME PLEASE THANK YOU

Answers

Answer: 2.)black

3.)red

4.)yellow

5.) I don't know I am very sorry

6.) I don't know I am very sorry

7.) light blue

8.) purple

9.) dark green

10.)purple

Which of the following is NOT an ionic compound?
A. AIN
B. CO
C. K20
D. Li2O

Answers

CO is not ionic because both elements in the compound are gases. Therefore the answer is B. Please give brainliest I need five more

which of the following is not a ligand to the porphyrin ring fe(ii) ion in oxymyoglobin?

Answers

His E7 isn't a ligand for the porphyrin ring (Fe(II)) ion in oxymyoglobin.

In the porphyrin ring, four pyrrole nitrogens are bound to the a ferrous (Fe(II)) ion centre. The Fe(II) ion does have six coordination sites, four of which are inhabited by pyrrole nitrogen, one by proximal histidine, and the final site can form a reversible bond with an O2 molecule.

A porphyrin is a large ring molecule composed of four pyrroles, which are smaller rings with four carbons and one nitrogen. A series of single and double bonds connect these pyrrole molecules, causing the formation of a large ring. The technical term for four pyrroles linked together is tetrapyrrole. The ring is flat in space and has a fairly even electron distribution around in its circumference.

A porphyrin is thus categorized as an aromatic compound. This demonstrates how stable a porphyrin molecule is. Porphin is the general porphyrin model. This molecule appears as just an intermediate in nature only on rare occasions, but it serves as the foundation for all porphyrin molecules.

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calculate the ph and % association of a 0.005427 m solution of triethylamine [a monoprotic weak base, n(ch2ch3)3

Answers

The ph and % association of a 0.005427 m solution of triethylamine [a monoprotic weak base, n(ch2ch3)3 is 11.92

Given trimethyl amine as B

                             B + H2O      \Leftrightarrow           BH+ + OH-    

I                    0.005427                           0           0

C                    -X                                    + X          + X

E                  0.005427 -X                      +X          +X

pKa = 10.72

-logKa = 10.72 ; Ka = 10-10.72   = 1. 905 x 10-11

We know Ka x Kb = Kw = 1.0 x 10-14

Kb = Kw/Ka = 1.0 x 10-14 / 1.905 x 10-11 = 0.5249 x 10-3

From the equation Kb = [BH+] [OH-]/[B]

0.5249 x 10-3  = X x X / 0.005427-x

From the above equation X  = 0.1687 x 10-2M

[OH-] = 0.1687 x 10-2 M

pOH = -log [0.1687 x 10-2 ] = 2 + 0.773 = 2.0773

pH + pOH = 14

pH = 14-pOH = 14-2.0773 = 11.92

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suppose that 0.08 m^3 of a gas has a gauge pressure of 2 atm and a temperature of 300 k. how many molecules are there in the gas?

Answers

Suppose that 0.08 m^3 of a gas has a gauge pressure of 2 atm and a temperature of 300 k. Approx 27 x 10^20 molecules are there in the gas.

To find the number of molecules in the gas, we can use the ideal gas law equation:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.

In this case, we know that the pressure is 2 atm, the volume is 0.08 m3, the temperature is 300 K, and the ideal gas constant is 8.31 J/mol*K. We can solve for the number of moles by rearranging the equation and substituting the known values:

n = (PV) / (RT)

= (2 atm * 0.08 m3) / (8.31 J/mol*K * 300 K)

= 0.0046 mol

Since there are Avogadro's number (6.022 x 10^23) of molecules in one mole of a substance, the number of molecules in the gas is:

Number of molecules = number of moles * Avogadro's number

= 0.0046 mol * 6.022 x 10^23 molecules/mol

= 27 x 10^20 molecules

Therefore, there are approximately 27 x 10^20 molecules in the gas.

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Iron(III) oxide reacts with carbon monoxide gas to form solid iron metal and carbon dioxide gas: Fe2O3+3CO→2Fe+3CO2
If you begin the reaction with 84.34 g of iron(III) oxide and 68.87 g of CO, which reactant will be in excess at the end of the reaction and how many grams will be remaining?

Answers

The 0.118 moles are the mass Iron(III) oxide reacts with carbon monoxide gas to form solid iron metal and carbon dioxide gas: Fe2O3+3CO→2Fe+3CO2.

Limiting and Excess Reactants:There are sorts of reactants which can be utilized in a chemical response process, those are the proscribing reactant and the extra reactant. There is continually a leftover quantity of the extra reactant after a response. The most quantity of merchandise that may be produced relies upon at the proscribing reactant.

mass of Fe2O3, mFe2O3 = 23.zero gmass of CO, mCO = 15.forty gmolecular weight of Fe2O3 MWFe2O3 = 159.sixty nine g/molmolecular weight of CO MWCO = 28 g/molFirst, we display the balanced chemical response:Fe2O3 + 3CO --> 2Fe + 3CO2

First, we convert the loads of the reactants into moles the usage of their molecular weight:

Solving for moles of Fe2O3, nFe2O3,

nFe2O3=mFe2O3MWFe2O3=23.0g159.69gmolnFe2O3=zero.144molesSolving for moles of CO, nCO,nCO=mCOMWCO=15.4g28gmolnCO=zero.55molesIn figuring out the proscribing and extra reactants, we decide the moles required for every reactant if we used all of the given moles adjusted consistent with their mole ratio withinside the balanced response.

The moles ecess reactant =nCO−nCOx=zero.fifty five−zero.432=0.118 molThe mass of the extra reactant left is calculated the usage of its moles and molecular weight,

massexcessreactantleft=mCO×M.

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what volume of bromine is required to react with 165 liters of chlorine gas according to the following reaction? (all gases are at the same temperature and pressure.)

Answers

The volume of bromine that is required to react with 165 liters of chlorine gas is 49.8 L.

(1) volume of chlorine=33.8 liters

Given reaction equation: Br2(g)+Cl2(g) -> 2BCl(g)

In case of gases, molar ratio can be expressed in terms of volume occupied by each gas at constant temperature and pressure.(volume is directly proportional to number of moles of gas).

According to the balanced reaction, moles of bromine =moles of chlorine=33.8 L

Hence volume of bromine required = 33.8 litres

(2)according to given reaction:

2BrF3 (g) -> Br2(g)+3F2(g)

total moles of product =4

reactant=2

Hence ratio of moles of reactant: product=2:4 i.e., 1:2.

so, total volume of product = 2 * volume of reactant(BrF3)=2*24.9L = 49.8 liters

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What information does a molecular formula provide?

A. the number and kind of atoms that are bonded by the transfer of electrons
B. the simplest whole number ration of atoms that are bonded by the transfer of electrons
C. information about a molecule's structure
D. the number and kind of electrons present in a molecule

Answers

The information in which molecular formula helps to provide is the number and kind of electrons present in a molecule.

The correct answer choice is option d.

What is a molecular formula?

A molecular formula is a formula which which helps to give information about the characteristic feature of an molecules as to the number and kind of electrons present in it.

A molecule is a substance which can normally exist alone and still retain the chemical properties of that substance.

In conclusion, we can now confirm from the explanation given above that molecular formula helps to to understand the constituent of a molecular substance.

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What is the mass of a neutron in atomic mass units (amu)?

Answers

The mass of a neutron in atomic mass units is 1.008665 amu

Because neutrons are atomic particles, neutrons are a component of atoms. The English physicist James Chadwick discovered neutrons for the first time in 1932. He found the presence of a particle with no electric charge while conducting radioactivity studies, and he named it the neutron which typically has zero charge.

The atomic mass unit or AMU is a unit of mass used to express the masses of atoms and molecules. The mass of a neutron is almost the same as the mass of a proton whereas the electron is much less massive. In terms of AMU, the mass of a neutron in atomic mass units is 1.008665 amu

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the student then mixes in 20ml of naoh into the solution. the resulting mixture has a ph of 1.8. what was the concentration of the naoh solution that was added to the hcl

Answers

The student then mixes in 20ml of NaOH into the solution. The resulting mixture has a ph of 1.8. 0.135 M was the concentration of the NaOH solution that was added to the HCl.

To determine the concentration of the sodium hydroxide (NaOH) solution that was added to the hydrochloric acid (HCl) solution, we need to know the volume of the NaOH solution and the resulting pH of the mixture. The pH of a solution is a measure of its acidity or basicity. It is defined as the negative logarithm of the concentration of hydrogen ions (H+) in the solution. The concentration of H+ ions is directly related to the concentration of the acid (for an acidic solution) or the concentration of the base (for a basic solution).

In this case, we are given that the resulting mixture has a pH of 1.8 and that 20 mL of NaOH was added to the HCl solution. We can use the pH of the mixture and the volume of the NaOH solution to calculate the concentration of the NaOH solution as follows:

First, we need to convert the pH of the mixture to the concentration of H+ ions. To do this, we can use the formula:

[H+] = 10^(-pH)

Plugging in the value for pH, we get:

[H+] = 10^(-1.8)

= 0.135 M

Next, we need to use the volume of the NaOH solution and the concentration of H+ ions to calculate the concentration of the NaOH solution. Since the NaOH solution neutralized the HCl solution, the concentration of H+ ions in the mixture must be equal to the concentration of the NaOH solution. Therefore, the concentration of the NaOH solution is 0.135 M.

Therefore, the concentration of the NaOH solution that was added to the HCl solution is 0.135 M.

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what is the mass (g) of 8.52 x 1022 molecules of nh3? enter your answer with 2 decimal places and no units.

Answers

The mass of 8.50 × 10²² NH₃ molecules is ≈ 1.84 g.

Solution:

Number of molecules = 8.50 × 10²² = 8687

Number of molecules = Number of moles × Avogadro's Number

8687 = Number of moles × 6.02×10^23

Number of moles = 8687\ 6.02×10^23 = 1443×10^-23 moles

Mass = Number of moles × Molar Mass = 1443×10^-23 × 17.031 = 24576×10^-23 = 2.4576×10^-18 g.

A quantitative measure of inertia, a fundamental property of all matter. In effect, it is the resistance that an object offers to changes in velocity or position when a force is applied. The greater the mass of an object, the smaller the change caused by an applied force.

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explain how osmotic concentration in sieve tube elements generates pressure and determines flow direction in phloem

Answers

The sucrose is actively transferred to the partner cells, and it diffuses from the companion cells to the sieve tube elements through the plasmodesmata.

As a result, the sucrose concentration in the sieve tube components rises. The same leaf vein receives water through osmosis from the neighboring xylem. The hydrostatic pressure on the sieve tube components rises as a result. Sucrose and other substances are forced through the sieve tube cells by hydrostatic pressure. Water is forced out of the sieve tube cells by osmosis, which reduces the hydrostatic pressure inside the cells. As a result of the entrance of sugars in sieve elements at the source and the elimination of sucrose, the pressure gradient is thus established.

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the heat of vaporization of water is 40.66 kj/mol. how much heat is absorbed when 3.22 g of water boils at atmospheric pressure? heat:

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Heat energy is absorbed to boil the water at atmospheric pressure is 6.506kJ.

Atmospheric pressure, also known as barometric pressure, is the force per unit area exerted by an atmospheric pressure column (that is, the total mass of air over a given area). Atmospheric pressure can be measured with a mercury barometer . This gives the height of the mercury column exactly in balance with the weight of the atmospheric column above the barometer.

Atmospheric pressure is also measured using an aneroid barometer. In this case, the sensing element is one or more hollow, partially evacuated, corrugated metal discs supported against collapse by internal or external springs. Changes in the shape of the disc due to changes in pressure can be recorded with a pen arm and a clock-driven rotating drum.

Calculation :

Step : 1

Calculate the number of moles of water as follows :

[tex]Number of moles of water = \frac{mass}{molar mass}[/tex]

                                        [tex]= \frac{2.88g}{18.0g/mol}[/tex]

                                        [tex]= 0.16mol[/tex]

Step 2 :

Now, calculate the heat energy absorbed to boil the water at atmospheric pressure is as follows :

[tex]Q = n*[/tex]Δ[tex]H_{vap}[/tex]

   [tex]= 0.16 mol * 40.66 kJ/mol[/tex]

   [tex]= 6.506 kJ[/tex]

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