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'ductile' is the ANSWER

No of NODAL PLANE = azimuthual quauntum no.(L)

law of multiple proportions, states that when TWO elements combine to form more than one compound, the mass of one element, which COMBINES with a fixed mass of the other element, will always be RATIOS of whole numbers.

Let us remember that the law of multiple proportions only applies to compounds COMPOSED of the same elements. It does not apply to, let's say, SO2 and CO2 because one compound has sulfur (S) and one has carbon (C).

From above explanation we can say that

Only option (a) satisfies the law of multiple proportion because in N2O4

Nitrogen mass =2×14=28.

Oxygen mass =16×4=64.

Here 28 gram of Nitrogen combines with 64 gram of Oxygen to form 1 molecule of N2O4.

While in N2O 28 gram of Nitrogen combines with 16 gram of Oxygen to form one molecule of N2O.

Hence, N2O4, N2O illustrates the law of multiple proportions

Pure ELEMENTS are pure substances that has consistent properties throughout. The moment you mix one or more elements or compounds together, you get what is TERMED as mixtures. There are different methods that are used for separation of mixtures:-

• Hand picking – This is one common method that is used for separation of solids and solids or un-soluble solids from liquids. Eg:- green marbles from Red marbles or gravels from water.

• DECANTATION – It is used to separate a mixture of liquids from heavy particles like water and sand.

• Filtration – It is a method that is used for separation of Liquids from solids that are not soluble in liquids, eg:- separation of sand and water using filter paper, or common filter at home.

• CENTRIFUGAL method- This method is COMMONLY used for separating two liquids that are of different densities like milk from cream.

• Evaporation- The method is commonly used for separating water and soluble solutes like sugar or salt by heating.

Apart from this, distillation, decantation and crystallization are also methods that are commonly used for separating mixtures from pure substances.

You can EASILY FIND it in a refreasher

by READING the LESSON

The example is the the MIXTURE of ethanol in WATER......

in which the both SOLUTE and SOLVENT is liquid.
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We KNOW that Avogadro's NUMBER of CALCIUM atoms has a mass of 40.1⋅g. How do we know this? Well, it's printed on the PERIODIC Table that should be beside you now if you are doing your chemistry homework.

And thus we can use this mass as a measure of the NUMBER of calcium atoms we POSSESS.......i.e.

Number of calcium atoms=27.0⋅g40.1⋅g⋅mol−1×NA, where NA=Avocado's number=6.022×1023⋅mol−1.

=27.0⋅g40.1⋅g⋅mol−1×6.022×1023⋅mol−1.

And we get the answer as a DIMENSIONLESS NUMBER as required.

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Valency of aluminium:

The atomic number of Aluminium is 13 ,so its electronic configuration is 2, 8, 3 .It has 3 electrons in outermost SHELL . The aluminium ATOM can lose these 3 electrons to form the aluminium ION ,Al³+, having an inert gas electron configuration of 2,8.

Since one atom of aluminium loses 3 (or 3+) electrons to achieve the inert gas electron configuration.

Valency of chlorine:

The atomic number of chlorine is 17 ,so its electronic configuration is 2, 8, 7 . The chlorine atom has 7 electrons in its outermost shell and it needs one electron to achieve the 8 electron configuration. So the chlorine atom gains 1 electron to form chloride Ion Cl- having an inert gas electron ARRANGEMENT of 2,8,8.

Since one chlorine atom gains 1 electron to achieve the inert gas configuration so the valency of chlorine is 1(or 1-)..

In AlCl3

Al³+ Cl¹-

3+ 1-

On crossing over the valency of aluminium and chloride ions the FORMULA of aluminium chloride becomes AlCl3

Aluminium chloride contains aluminium ions Al³+ and chloride ions Cl-. Now the valency of aluminium ion Al³+ and is 3 and that of chloride ion is 1. So one aluminium ion Al³+ will unite with 3 chloride ions to form AlCl3.

No we cannot store copper SOLUTION in a zinc pot because zinc being more REACTIVE than Copper will dispalce copper from its salt solution and it will FORM Zinc salt solution ...

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Number of MOLES in 64 grams = 64/16 = 4 moles

1 MOLE of CH4 contains →6 + 4 = "10 moles of ELECTRONS"

So, 4 moles of CH4 contains →4 x 10 = "40 moles of electrons"

Thus 64 grams of CH4 contains 40 moles of electrons.

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Synthetic fibers are made by humans with chemical synthesis,as opposed to natural fibres that humans GET from living organisms
Synthetic fibers are more durable than most natural fibres and will readily pick-up different dyes.Compared to natural fibres,many synthetic fibers are more water resistant and stain resistant.Some fabrics are ALSO designed to stretch in specific ways,which makes them more COMFORTABLE to wear.
◆They do not shrink .
◆They are QUICK drying and need little or no ironing.
◆They last longer as compared the fabrics made from natural fibres.

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Because hydrogen is the most abundant GAS in the WORLD it also does not SUPPORT COMBUSTION.

Neutralization is a type of chemical reaction in which a strong acid and strong base react with each other to form water and SALT.FOR EG-

HCL+NAOH-NACL+H20

. A neutralisation involving an acid and a base (or alkali) always PRODUCES salt and water.

This is because the acid REACTS with the alkali to form neutral products. A reaction in which acidity or alkalinity is removed is called neutralisation

ANS 2

ANS 6

A -

B-

C-IT IS A REDOX REACTION AS IT HAVE BOTH OXIDATION AND REDUCTION REACTION

OXIDATION  OF ZN

REDUCTION OF H2SO4

As in EQUATION bothside are equal ,it also so .like
H2+O2=,H2O
it is not balance. LET s balance
2H2+O2=2H2O
now it is BALANCED

Any odd degree POLYNOMIAL with real coefficients has at LEAST ONE real root. In what follows, I ..... OOPS - nice answer to the WRONG question. 1 .... So necessary conditions are.

The mass by mass percentage of a solution is GIVEN by the FOLLOWING relation:-

where mass of solution = mass of SOLUTE + mass of solution

Here, mass of the solute (i.e. SALT) = 15 g and the required CONCENTRATION of the solution is 15 %.

Let the mass of water be a grams.

So,

15 = [15 / (15 + a)] X 100

Solving for a, we get

a = (100 - 15)g = 85 g

When the ELECTION is loss then process is CALLED oxidation.. ..

Elements that are METALS tend to lose electrons and become positively CHARGED ions called cations..

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It will be called as Evaporation. This is because Evaporation CHANGES a LIQUID into gaseous STATE before reaching its Boiling Point and we know that the Boiling point of WATER is 100 degree Celsius.

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11.2 LITER of CO2 is PRODUCED at STP.

●••••• ☆ BRAINLY STAR ☆ •••••●

I will speak in an accurate manner , i will SEE my EXPERIENCE in MIND

??. ............ .....

The answer is INHERENT because Oliver's inherent ability in becoming a wide receiver and also dodging the natural attacks is very useful during the game of football.

Inherent ability is nothing but the essential quality that a PERSON or an animal POSSESS in order to LIVE a good quality of life.

A 20 CC mixture of CO, CH4, and he gases which are EXPLODED by electric DISCHARGE at the room TEMPERATURE with the excess of the oxygen , it contraction in volume was found to be in the form of the 13cc and 14cc when residual gases is treated with the KoH.

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Helium has the MAXIMUM value of ionization energy among all elements in the Periodic Table because He having full FILLED electronic configuration DUE to which we REQUIRED a maximum IONISATION enthalpy/energy to remove an electron from its valence shell.
Helium has the maximum value of ionization energy among all elements.

Because ORGANIC COMPOUNDS FORM very EASILY..

Latent heat of vaporisation it is the energy (heat) required to TRANSFORM a liquid mass at the BOILING point (for example, water at 100°C at normal pressure) from liquid to gas.

It is called "latent" (not seen, not registered) since this energy flow do not CHANGE the TEMPERATURE so we can not "see" it.

For water, is about 2264 kJ/kg or 2264 J/g or 541 cal/g.

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Down the GROUP IONISATION ENERGY is DECREASE

0.33 GM of iron in 100 gm of HEAMOGLOBIN

molar mass of heamoglobin is 67,200 gm
suppose x gm of iron is PRESENT in 67,200gm of Hb
therefore,
0.33 - 100
x - 67200

0.33×67200/100 = 221.76 gm of iron

now, mass of 1 ATOM of Fe =56
some atoms of mass of Fe= 221.76
let those some atoms be y
therefore,
1 - 56
y - 221.76

1×221.76/56 = 3.96 atoms which is approximately by round off is 4.0


answer: 4 atoms of iron

We NEED a drink of 4-5 LITRES of WATER per DAY.

No. Of mole of O2 is LESS so O2is limiting

MOLES of water = moles of O2

I.e 1.25 moles

MASS of water FORM = 1.25×18= 22.5 gm

Chlorine has 7 electrons in its outermost shell.

So, to attain stable "octet configuration", which means 8 electrons in the outermost shell; chlorine has to gain 1 electron.

After gaining 1 electron, CHLORIDE ion is formed which is DENOTED by Cl⁻

Since it gains 1 electron to attain stable configuration, its VALENCY becomes 1

In GENERAL,

Valency = Number of valence electrons ( if valence electrons ≤ 4)

Valency = 8 - Number of valence electrons ( if Valence electrons > 4)

NOTE: (though you might KNOW it already)

Valence electrons is the number of electrons in the outermost shell.

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RESPECTED Manager,

Please make a provision for a ramp along stairs SINCE a lift cannot be INSTALLED.

Because walking in stairs is not a easy task. We are in the 8th floor, so we COULD not move FORWARD easily.

If you make a provision for a ramp along stairs, it will be comfortable for us.

GULLIVER’s TRAVELS gives an account of Lemuel Gulliver who starts on a journey to East INDIES.

On the WAY, he encounters violent storms, which are important in taking him to DISTANT lands and thereby create all the adventurous mode of this novel.

The storms are significant about Gulliver’s own motive about encountering different situations in his life.

◆ Organic reactions OCCUR between organic compounds, i.e., which occur naturally.

◆ INORGANIC reactions occur between inorganic compounds, i.e., which doesn't occur naturally

The substantial rain that has been lashing the CITY throughout the previous two days has brought about expanded inflow of water into the city's two SUPPLIES.

A few MONSTROUS trees along the principle Market Street, have been evacuated in the POWERFUL breezes going with the rain and the Corporation groups are working day and NIGHT to expel these.

The sticky film on teeth consisting of FOOD particles, bacteria and saliva is called dental plaque.

Plaque is formed between teethes and also on gum line.

Plaque can BECOME a dental issue if not cleaned and cleared REGULARLY and properly.

It is generally a clear TRANSPARENT sheet over the teeth.

It teeth can be felt rough upon accumulation of such film.

Photo Albums are a treasure trove of memories.

They give you a clear picture of the PAST and even take you to the time when you were born.

The first few years after your birth, cannot be remembered by an ADULT.

But if these MOMENTS are captured beautifully, then when a child grows up he can watch these PHOTOS and relive his CHILDHOOD.