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The order of reaction is defined as the sum of the powers of concentrations In the rate law.

The rate of second order reaction can be expressed as rate = k[A]2

The reaction X → Y follows second order kinetics.

Therefore, the rate equation for this reaction will be:

Rate =k[X]2 ________________________(1)

Let [X] =amol L-1, then equation (1) can be written as:

Rate=k[a]2

=ka2

If the concentration of X is increased to three times, then [X] = 3amol L-1

Now, the rate equation will be:

Rate =k[3a]2

= 9(ka2)

Hence, the rate of formation will increase by 9 times.

. i) Substance X is lime water.

Ca(OH)2+ CO2→CaCO3+ H2O

Ca(OH)2-(Lime water)

CO2-(Carbon dioxide)

CaCO3-(Calciumcarbonate)

H2O -(Water)

(ii) Calcium oxide reacts vigorously with water to produce slaked lime (calcium hydroxide) releasing a large amount of heat.

CaO(s) + H2O(l)→Ca(OH)2(ag)

CaO(s) -(Quicklime)

Ca(OH)2(ag) -(slaked lime)

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the quality, condition, or fact of being exact and accurate.

or

Precision refers to the closeness of two or more measurements to each other. Using the example above, if you weigh a given substance five times, and get 3.2 kg each time, then your measurement is very precise. Precision is independent of accuracy. You can be very precise but inaccurate, as described above. You can also be accurate but imprecise.

it's is good

(i) The X substance is plaster of paris (POP)CaSo4.1/2 H2o(ii) CaSo4.1/2 H2o + H2o____> 2CaSo4.2H2o

A monomer is a molecule that forms the basic unit for polymers. They may be considered the building blocks from which proteins are made. Monomers may bind to other monomers to form a repeating chain molecule via a process called polymerization. Monomers may be either natural or synthetic in origin.

i) a molecule that can be bonded to other identical molecules to form a polymer.

ii) Polyesteris a synthetic polymer made of purified terephthalic acid (PTA) or its dimethyl ester dimethyl terephthalate (DMT) and monoethylene glycol (MEG)

Polyester is a synthetic polymer made of purified terephthalic acid (PTA) or its dimethyl ester dimethyl terephthalate (DMT) and monoethylene glycol (MEG). With 18% market share of all plastic materials produced, it ranges third after polyethylene (33.5%) and polypropylene (19.5%).

Polymers are made up of many many molecules all strung together to form really long chains (and sometimes more complicated structures, too).

Plastic, paper, metal etc. can be recycled easily. The recycling of things helps in saving environment by:

Recycling reduce the amount of garbage sent to landfills and thus prevent land pollution.

Recycling prevent faster depletion of resources.

Prevents pollution caused by reducing the need to collect new raw materials.

It saves space in landfills. The items that we recycle are not biodegradable.

If you recycle paper, trees that make oxygen for us to breathe live longer. By this we can cut down the amount of CO2being added to the greenhouse gases already in the atmosphere. So you are slowing down global warming.

yes ,nuclei have the same binding energy

F-F has most binding energy because it is more electronegative.

Florin F-F has most bonding energy because it is more electronegative.

F-F has More binding energy because it is more electronegativity

Flourine is the correct answerrrrrrrrrrrrrr.

the answer of your question is fluorine as electronegativity from left to right increases in a periodic table

Energy of Photon, E= nhv

E= nhv where h is a constant now called plank's constant value is 6.6 x 1o^-34 J

v= frequency

thevalue of n must be a whole number.

In CCP crystalNumber of N atoms (Z) = 4Number of tetrahedral voids = 2Z = 8Number of M atoms = 1/3rd of 8 = 8/3N:M = 4: 8/3Formula, = N12M8orN3M2

1 mole has → 12gm

=> 6× 10²³ atoms → 12=> 1 atom mass = 12/6 × 10-²³ = 2×10-²³ grams

It gives mass mass relationship.

hii dear!!

it gives, mass - mass relationship.

i hope help you

Molality, also called molal concentration, is a measure of the concentration of a solute in a solution in terms of amount of substance in a specified amount of mass of the solvent.

In H2S , there are 2 number of hydrogen atoms and 1 number of sulfur atom.

As we know that 1 mole is equal to the 1 gram atom

As, 1 mole of H2S contains 2×0.40=0.8 gram atoms of H

So, 0.40 mole of contains gram atoms of H

As, 1 mole of H2S contains 1 gram atoms of S

So, 0.40 mole of H2S contains 1×0.40=0.40 gram atoms of S

Therefore, 0.8 gram atoms of H and 0.4 gram atoms of S are present in 0.40 mole of H2S

According to the solutions there exist 7 different structural isomers 'containing 3 degree amines' for the molecular formula C6H15N

five of them are:

it will be c i m sure plzzz tick c option ok

K2SO4. Al2(SO4) 3.24H2O is commonly known as potash alum.

In one one complex molecule of potash alum, 4 ions of SO4^2- are present.

So in 1.25 moles of potash alum, 4 * 1.25 moles of SO4^2- are present i.e. 5 moles

1 mole of sulphate ions = 96 gm

Therefore 5 moles = 96 * 5 gm = 480 gms

(i) aluminium sulphate(ii) calcium carbonate(iii) potassium sulphate(iv) calcium chloride

option A should be correct..

it is an electrophilic halogenation , and NH+ will give + M , to its benzene ring and direct Br+ at para position.

Answer: c)not changeExplanation:Surface tensionis caused by the effects of intermolecular forces at the interface.Surface tension depends onthe nature of the liquid, the surrounding environment and temperature. Liquids were molecules have large attractive intermolecular forces will have a largesurface tension.

1. Joseph Proust2. Antoine Lavoisier

Antony L. lavoisier and Joseph L. Proust

Most of the dirt is oily in nature and oil does not dissolve in water.

The molecule of soap constitutes sodium or potassium salts of long chaincarboxylic acids.

In the case of soaps, the carbon chain dissolves in oil and the ionic end dissolves in water.

Thus the soap molecules form structures calledmicelles.

In micelles, one end is towards the oil droplet and the other end which is the ionic faces outside.

Therefore, it forms an emulsion in water and helps in dissolving the dirt when we wash our clothes.

Soap is a kind of molecule in which both the ends have different properties.

Hydrophilic end

Hydrophobic end

The first one is the hydrophilic end which dissolves water and is attracted towards it whereas the second one is the hydrophobic end that is dissolved in hydrocarbons and is water repulsive in nature. If on the surface of the water, soap is present then the hydrophobic tail which is not soluble in water will align along the water surface.

When sodium hydrogen carbonate is added to acetic acid, carbon dioxide (CO2) gas is evolved.

NaHCO3+ CH3COOH CH3COONa+ H2O + CO2

(Sodium hydrogen carbonate + Acetic acid = Sodium acetate + water + carbon dioxide) Carbon dioxide supports all the above three properties. CO2turns lime water milky, it is a non-supporter of combustion and is absorbed by strong alkalis such as NaOH.

Salt: Sulphate, Chloride or hydrogen Carbonate of Calcium or Magnesium (any one)

By adding equal amount of soap to water taken in two test tubes, shakingvigorously and comparing the length of lather or foam formed in each testtube.

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a).It has a sour taste and pungent smell. It is the main component of vinegar. Vinegar is typically 3-7% solution ofacetic acidin water.

b)A weakacidis one which doesn't ionise fully when it isdissolved in water.Ethanoic acidis a typical weakacid. It reacts withwaterto produce hydroxonium ions and ethanoate ions, but the back reaction is more successful than the forward one. The ions react very easily to reform theacidand thewater.

c)It turns bluelitmus paperred, indicating that it isacidicin nature. However, it is a weakacidbecause it does not dissociate comple in aqueous solution.Acetic acidreacts with sodium bicarbonate to produce carbon dioxide.

d)Sodium hydrogencarbonate on reaction with acetic acid releases carbon dioxide gas.NaHCO3+ CH3COOH → CH3COONa + H2O + CO2Test for carbon dioxide:The presence of carbon dioxide can be tested by bringing a burning splinter near the mouth of the cylinder containing carbon dioxide – it gets extinguished.If carbon dioxide is passed through limewater, it turns milky white.Ca(OH)2+ CO2→ CaCO3+ H2O

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but this answer is wrong

When sodium hydrogen carbonate is added to acetic acid, carbon dioxide (CO2) gas is evolved.

NaHCO3+ CH3COOH CH3COONa+ H2O + CO2

(Sodium hydrogen carbonate + Acetic acid = Sodium acetate + water + carbon dioxide) Carbon dioxide supports all the above three properties. CO2turns lime water milky, it is a non-supporter of combustion and is absorbed by strong alkalis such as NaOH.

The chemical formula of Lead Sulphate is PbSO4.

PbSO4 is the correct answer of the given

pbso4 is the formula of lead sulphate

PbSO4 is the correct answer

The chemical formula of lead sulphatelead(pb). valency is 2sulphatevalency is 2Hence,PbSo4

PbSO4 is a correct formula

PbSO4 is the correct answer

Ans :- NaHCO3

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Carbon dioxide

Water can be softened by adding sodium carbonate (washing soda)

washing soda is the adding of hard water

3. A chemical formula is a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule, using chemical element symbols, numbers, and sometimes also other symbols, such as parentheses, dashes, brackets, commas and plus and minus signs.

Ionic compounds are neutral compounds made of positive cations and negative anions.Writingthechemical formulafor ionic compounds is fairly easy. Write the cation symbol, then the anion symbol. Find the lowest common multiple for the ions to make the compound neutral.

RULE I: Cross multiply the valencies of the elements to form the formula of the respective compound.

RULE II: If a compound consists of both metallic as well non-metallic elements then name or symbol of the metal is considered first.

RULE III: In case compounds are formed from polyatomic ions then the ion is enclosed in a bracket before writing the number to indicate the ratio. But in case the number of polyatomic ion is one then there is no need for bracket.

hi

Zn(OH)2

Zn valency 2 and OH charge is -1 so on interchanging the value irrespective of the signs we get zn(OH)2

Zn(OH)2

potassium chloride valency=1hydrogen bromide valency=-1magnesium bromide valency=3k2o=potassium oxide valency=-2NaH=sodium hydride valency=1cacl2=calcium Chloride valency=2ccl4=tetrachloromethane valency=4HI=hydrogen iodide valency=1H2s=hydrosulfuric acid valency=2Na2s=disodium sulphide valency=-2Fes=ferrous sulphide valency=2+Bacl2=barium dichloride. valency=2

Reverberation, in psychoacoustics and acoustics, is the persistence of sound after a sound isproduced.

CaCl₂ + 2Ag → 2AgCl + 2Ca

✓ Equivalent of CaCl₂ = Equivalent of AgCl

Eʷ = Mʷ / 2

⇒ w × 2 / 111 = 14. 35 / 143. 5

⇒ W = 5. 55 g

40 multiply by 108it is a correct answer

1)No.of moles=given wt./actual atomicwt.Moles. = 18/27Moles = 2/3

2)No.of moles=given wt./actual atomicwt.Moles. = 40/32Moles = 5/4

(ii) contains the minimum number of molecules as 46 gms of ethyl alcohol makes 1 mole but 54 gms of nitrogen pentoxide makes only 0.5 moles and hence the number f molecules is lesser for nitrogen pentoxide