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Mass of KNO3 = 39+14+16*4=35+64=98 G
molecules in 98 g kno3= 6.022*10^23
8g =8/98 moles kno3
no. of molecules= 6.022*10^23 * 8/98 = 4.91*10^22

CH3-CH2-CH2-COOH THIS IS YOUR ANSWER

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Then??? Couldn't GET your QUESTION.

The CORRECT ANSWER is d

we know v1/t1=v2/T2  ;    we NEED to convert CELCIOUS to kelvin

20/293=35/t2                                           THEREFORE 20+273=293

t2= 167.42 kelvin

Ionic EQUILIBRIUM is the equilibrium ESTABLISHED between the unionized MOLECULES and the IONS in a SOLUTION of weak electrolytes.

Sodium carbonate is a water soluble salt of sodium.Crystalline sodium carbonate, on KEEPING, LOSES its water of crystallization READILY and a White powder is obtained.


This white powder is obtained is CALLED Washing Soda.



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An ELEMENT x forms an oxide xo which TURNS blue litmus SOLUTION red and does not react with SULPHURIC acid. The given element x is metal or non metal?

CU(2+) andSO4(2-) IONS formed.

Cu will GET deposited at cathode.

As we know pressure is DIRECTLY proportional to AREA . Thus, when the area is larger the pressure EXERTED is less and when the area is SMALLER the pressure exerted is high. So needle EXERTS more pressure as it has less area.

The order is as -
MELTING point than boiling point.

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Gases which EXIST FREELY in the ATMOSPHERE and STABLE in NATURE ie. Valence electrons 2 (dupley) or Valence electrons 8 (octet)

The drought OCCURS when there's a SCARCITY of WATER in a PLACE i.e. when there's no or less RAIN .

Chlorine has two stable isotopes chlorine-35 and chlorine-37with Chlorine-35 accounting for roughly 3 out of EVERY 4 NATURALLY OCCURRING chlorine ATOMS.

Biconvex I.e. CONVEX LENS is USED by a watch repairers.

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Because when we BREATH out, then the air comes out is rich in MOISTURE so it make glasses wet.

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Answer : O2

Critical temperature : It is the HIGHEST temperature at which gas can LIQUEFY. Above critical temperature, gas can never be change into LIQUID state.

gas convert into liquid state by COOLING or lowering its temperature which decrease the average kinetic energy of MOLECULES which allows gas to convert in liquid form.

Hey FRND....
we KNOW that
MOLES = given mass/MOLAR mass
so for O2
molar mass = 16×2 = 32

so moles = given mass/ molar mass
= 46/32
= 1.43 (approx)

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If the a-particles are taken upon metal other than gold then it will probably show no CHANGE because gold is very malleable and DUCTILE which can be beaten into THIN sheets which us perfect for carrying out the experiment.

Iron does not REACT with water in the ordinate temperature. It REACTS only with steam. When steam passed over RED HOT iron, iron oxide and hydrigen gas are formed.

Because there is a REACTION that TAKE PLACE between WATER and SURROUNDING

Liquid evaporating from a surface has a cooling EFFECT. And different liquids have this effect to different degrees. For example, rubbing alcohol has more of an evaporative cooling effect than water. Alcohol EVAPORATES comparatively more quickly than water, so scientists class it as a "volatile" liquid. But regardless of the liquid, they all follow the same principle of evaporative cooling. In its liquid state, the substance—whether water or alcohol—has a certain HEAT content, which is central to the process. ALSO critical to this are two of the three basic phases of matter: liquid and vapor. (The SOLID phase is, of course, the third.)

Helium GASES are USED in balloons.
it's also used in chemical reaction

I think it is racemine structure but I am not sure because in my CLASS ORGANIC CHEMISTRY was in middle half

When 'n' stereo Centers are present in a COMPOUND and plane of SYMMETRY is absent then 2^n stereo ISOMERS are possible.

so no. of stereo Somers possible = 2^3 =8
(no. of stereo isomers=3)

Valence ELECTRONS are the electrons in the outermost energy LEVEL of an atom, in the energy level that is farthest AWAY from the nucleus. When CHEMISTS study chemical reactions, they study the transfer or sharing of electrons.  The electrons that are more loosely held by the nucleus (the valence electrons, those furthest away from the nucleus) are the ones that are gained, lost, or shared.

I THINK 2 PENTENE willshow GEOMETRICAL ISOMERS

I DONT KNOW because i am CLASS 8 okkķkķkkkkk!

ANSWER:In HOT ACIDIC MEDIUM glucose is DEHYDRATED to hydroxymethyl furfural. This forms a green colored product with phenol and has absorption maximum at 490nm.

Explanation:

Because OH GROUP is attached to benzene which makes its properties SIMILAR LIKE ACIDS

1.2044x10^23
that's a CORRECT ANSWER

In combination REACTION the PRODUCTS COMBINE to form products.
As well as in decomposition reaction the reactants decompose or split to form the product.
That's why they are TOTALLY DIFFERENT..

That REPRESENT the TRANSITION means ....

the intermediate of two ULTIMATE PROCESSES

I assume you mean a propene CARBOCATION, & which would be stabilized by resonance with the double BOND (pi bond) with the adjacent carbon, THUS lowering the ENERGY of the carbocation by distributing the positive charge all over instead of KEEPING it trapped on one atom as in a propane carbocation.

When a metal conducts electricity, the charge is carried by ELECTRONS moving through the metal. Pure WATER contains very few ions, so it does not CONDUCT electricity very WELL. When table salt is dissolved in water, the solution conducts very well, because the solution contains ions.