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Centripetal acceleration is the rate of change of tangential velocity.Centripetal (radial) accelerationis theaccelerationthat causes an object to move along a circular path, orturn

Potassium chlorate decomposes by two parallel reactions i)KClO3 decomposes to give 2KCl +3O2 ii)KClO3 decomposes to give 3KClO4 +KCl If 3 moles of oxygen and 1 mole of KClO4 is produced along with other products then determine initial moles of KClO3

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(c ) option is correct answer

option C is the correct answer

answer is option c)245g of KClO3

option B.

The balanced chemical equation for this reaction can be written as:​2KClO3(s) → 3O2(g) + 2KCl(s)2 x 122.5=245 2 x 74.5 =149As indicated above when 245 gram of KClO3reacts it produce 149 g of KCl.The weight loss during the reaction is 245 g - 149 g= 96 g​Now we will find that how many gram of KClO3reacts to give the weight loss of 0.384 gram.96g of weight loss when KClO3is 245 g​therefore 0.384 gram of weight loss for KClO3will be = 245/96 x 0.384 = 0.98 g​% of KClO3reacting or decompose = 0.98/4.9 x 100 = 20 %

you are sure that second option is correct

For an electron in the 4th level, we have 3 3 single jump possibility, i.e.4→→34→→24→→1

Similarly,3→→23→→1

And finally,2→→1

That gives us a total of 3 + 2 + 1 = 6.

true is correct and nylons

pvc is used for make water pipe, nylon is used for make strings etc.

pvc is used for making pipes whereas nylon is used for making strings etc.

true is correct and nylon

Nylonis used for for making plastic machine parts as it is low cost and long lasting. It is often commonly used in the electronics industry for its non-conductivity and heat resistance.

The basic raw materials forPVCare derived from salt and oil. Chlorine is manufactured by the electrolysis of sodium chloride, salt. ... The resulting element is ethylene dichloride, which is converted at very high temperatures to vinyl chloride monomer

Plastic material is the key innovation of our decade and it is involved in every type of new mechanical and development innovation & progress. In 2013, world total plastic product consumption was $281.5 billion and with an average growth of 6% it has been reached to 298.3 billion in 2014.





China is the highest plastic manufacturing country with the world and has 26% of market share in world plastic product manufacturing.

Over the decade we have modified and innovated different types of plastic materials from core plastic with some unique properties and nature. Plastic materials like Polyethylene, Acetal, Nylon, polypropylene, PVC and Polycarbonate are very common in the plastic industries. Some plastic materials are used to build heavy industrial machinery and some are used to store food in the household.

Today we will discuss top 3 plastic material Nylon Plastic, PVC Plastic & Acetal Plastic and their properties.

Electric wiresand cables arecoatedwith substance likepvcto prevent fromelectricshock and alsopvcis insulator(bad conductor ofelectricity). ...PVCdoes not conductelectricityand is therefore an excellent material to use forelectricalapplications such as insulation sheathing for cables

electric wires and cablesare coated with substance like pvc to prevent from electric shock and also pvc is insulator(bad conductor of electricity). PVC can be cut, shaped, welded and joined easily in a variety of styles. Its light weight reduces manual handling difficulties.

PVC does not conduct electricity and is therefore an excellent material to use for electrical applications such as insulation sheathing for cables.

Copper metal when exposed to air turnsgreenin colour due to corrosion. When copper vessel is exposed to air in rainy season, the metal reacts with gases and moisture and atmospheric gases to form a mixture of copper carbonate and copper hydroxide. This gives agreencolour to the surface of copper metal.

Liquids show the unique property of turning into vapors, as soon as the temperature rises! Generally, vapors from the aqueous substance occupy the walls of the unfilled part of the container and exert a pressure on the walls of that container, this pressure is called the vapor pressure.

The molecules in a liquid experience an equal intermolecular force from all the sides. The intermolecular force between the molecules on the surface is exerted perpendicularly downwards and this is called the surface tension of the liquid. The surface tension of a liquid depends on the intermolecular forces directly, greater the force higher is the surface tension.

The viscosity of a liquid substance is a measure of resistance to flow. The intermolecular forces and internal friction between the moving molecules in the liquids make them viscous to flow.

tanku

If the α-scattering experiment is carried out using a foil of a metal rather than gold, there would be no change in the observation. In the α-scattering experiment, a gold foil was taken because gold is malleable and a thin foil of gold can be easily made. It is difficult to make such foils from other metals.

If the α-scattering experiment is carried out using a foilof ametal ratherthan gold, therewouldbe no change in the observation. In theα-scattering experiment, agold foilwas taken becausegoldis malleable and a thinfoilofgold canbe easily made. It is difficulttomake suchfoilsfromother metals.

Count of cobalt's electrons = 24

the number of bonded electrons 4from the 2 Cl-

and(2⋅2⋅2 =8)from ethylenediamine.

The EAN should be

8+24+4=36

can you please tell me what is the oxidation state of en?

we have density d=ZM/a^3NaZ=no of atom to calculateM is the molecular massNa is the avagadro constanta is the edge lengthZ=(d*a^3Na)/M=6.23*(4*10^-8)^3*6*10^23/60=4Therefore th unit cell is FCC.and the length of the unit cell is sqrt2 a=4*radius=sqrt2/4*400pm=141.4pm

n=2 l=0,1 m=-1,0,1

Flavin adenine dinucleotide in its oxidized state is calledFAD. ... Similar toNAD,FAD worksin association with a "dehydrogenase" enzyme. The reaction removes two hydrogen atoms; each a proton withoneelectron. Both hydrogen atoms bond withFAD.

option A. is the correct answer.

As spontaneous reaction must depend on energy , entropy and temperature.

Kc× (RT)^∆n∆n=(no of moles of gaseous products - no of moles of gaseous reactants)Therefore, ∆n = 1-2= (-1)Now, Kc=26, R=0.0821, T= 250+273.15=523.15KHence, Kp= 26×(RT)^ -1=26/RT = 26/(0.0821×523.15) = 0.61

Ty

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Iron and aluminiumwill displace hydrogen from dilute acidsas they more reactive thenhydrogen. Mercury and copper cannotdisplace hydrogen from dilute acidsas they are less reactive thanhydrogen.

Cyclonesare also used in oil refineries to separate oils and gases, and in thecement industryas components of kiln preheaters. ... Similarseparatorsare used in the oil refiningindustry(e.g. for Fluid catalytic cracking) to achieve fastseparationof the catalyst particles from the reacting gases and vapors.

No reaction will take place as iron (Fe) is less reactive than zinc (zn) . Hence, iron will not displace zinc from its salt solution.

Thomson’s atomic model failed to explain how the positive charge holds on the electrons inside the atom. It also failed to explain an atom’s stability.

The theory did not mention anything about the nucleus of an atom.

It was unable to explain the scattering experiment of Rutherford.

Hygroscopy. This is when substances absorb water from air, but not enough to form solutions. ... lf a hydroscopic substance absorbs so much moisture that an aqueous solution is formed, the substance becomesdeliquescent.

Because it's a exothermic reaction in which heat energy is evolved. Simply, when water is added to quicklime ( calcium oxide), a lot of heat energy is produced - That's why it starts boiling.

CaO + H2O. -----> Ca(OH)2 + heat

1.Magnesium oxide is basic in nature and SO2 is acidic in nature. 2. MgO is a metal oxide whereas sulphur oxide is a non metal oxide.3. In MgO ionic bond is present and in SO2 covalent bond is present.

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Sulfur has 16 electrons which gives an electronic structure of :

1s2 2s2 2p6 3s2 3p4

So you can see there are 6 electrons in the outer energy level which are available for chemical reactions.

It is better to think of oxidation states rather than valency.

The oxidation state , or number, is the charge on the atom if the compound was 100% ionic.

Sulfur can formcompoundswith oxidation states ranging from -2 to +6.

S2−the sulfide ion which is -2

Sthe element which is zero

SO2sulfur (IV) oxide which is +4

SO2−4sulfate(VI) which is +6.

Note we use roman numerals to signify the oxidation state

There are many more, but all within that range.

this is because of presence of dorbital in Sulphur.In Sulphur the excitation of np-electrons to nd-subshell gives rise to increase in number of unpaired Electrons

option 2.

option 1 is right

In FeCl2valency of Fe is 2 and valency of Cl is 1 by criss cross method.(Fe² Cl¹)in FeCl3,valency of Fe is 3 and valency of Cl is 1 by criss cross method(Fe³ Cl¹)so valency of Fe is 3

Definition : When a molecule containing a H atom is linked to a highly electronegative atom (like N, O, F), this atom attracts the shared pair of electrons more and so this end of the molecule becomes slightly negative while the other end (i.e., H-end) becomes slightly positive. The negative pole of one molecule attracts the positive pole of the other molecule and so on and as a result, a weaker bond is formed between them. This bond is called hydrogen bond.

As a result of Hydrogen bonding, a H-atom links the two electronegative atoms simultaneously, one by a covalent bond and the other by a hydrogen bond. Hence it is said to form a hydrogen bridge. Hydrogen bond is a weak bond, but it is stronger than van-der Waals forces.

calculate the number of molecules in a drop of water weighing...1)Molecular mass ofwater= 18 g.

2)No. of moles in0.05 gofwater= 0.05/18.

3) = 2.78 x 10-3mol.

4) = 1.67 x 1021molecules.

Mercury - Hg

Potassium - K

Nitrogen - N

Copper - Cu

sulphur - S

Carbon - C

Chlorine - Cl

Oxygen - O

aqueous solution of pHone greater than 7 is Na2CO3 is washing soda

ans is option B

CuSO4... Colour... Copper Sulphate solution is only changed because according to reactivity series iron is more reactive than copper....That is why it displaced copper from the solution and form iron sulphate....

This is an example of displacement reaction.

In the presence of light,chloroformis oxidized by the air to form carbonyl chloride or phosgene and HCl, which is highly poisonous.

Thats why,it iskeptorstoredin coloredbottleto prevent it from oxidization keeping away from light.!! ... Hence,chloroformisstored in dark-colouredbottlesfilled up to the brim.

When food is damaged in such a way that it becomes unfit for consumption by human beings is called rancidity.

When edible oils are stored for a longer period of time then oxidation occurs. There is carbon-carbon double bonds in fats and oils which are broken down by the oxygen in the free space or atmosphere.

As a result, after a long period of time fats and oils become rancid.