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ANSWER:

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Answer:

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Compound:- CALCIUM Chloride.

Molecular FORMULA: CaCl₂

Molecular MASS:- 40 + 2×35.5 = 111

(Atomic mass of CA = 40 and CL = 35.5)

Hence,

In 111g of Calcium chloride, there is 40g of Calcium and 71g of Chlorine.

Percentage Composition of Calcium:

\frac{40}{111} \times100 = 36.03

111

40

×100=36.03

Percentage composition of Chlorine:

\frac{71}{111}\times100 = 63.96

111

71

×100=63.96

Thus,

Percentage Composition of Calcium is 36.03%

Percentage Composition of Chlorine is 63.96%.

ANSWER:

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ANSWER:

the BLEACHING ACTION of CHLORINE is DUE to

Answer:

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Explanation:

chloride ions Cl –(aq) (from the dissolved sodium chloride) are DISCHARGED at the positive electrode as chlorine gas, Cl 2(g) sodium ions Na +(aq) (from the dissolved sodium chloride) and hydroxide ions OH –(aq) (from the water) stay BEHIND - they form sodium hydroxide SOLUTION, NAOH(aq)

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ANSWER:

THERMOMETER is USE for MEASURING TEMPERATURE.

Answer:

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ANSWER:

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Answer:

Let us consider that there is 100 grams of HNO

3

solution.

∴ Mass of HNO

3

+ Mass of H

2

O=100 g

∵ Mass of HNO

3

=12.2 g

∴12.2g+ Mass of H

2

O=100 g

∴ Mass of H

2

O=100−12.2=87.8 g

n

H

2

O

=

M

H

2

O

W

H

2

O

=

18

87.8

=4.87 mol

Number of moles of HNO

3

n

HNO

3

=

M

HNO

3

W

HNO

3

=

63

12.2

=0.1936 mol

∴ Total moles in the solution,

n

H

2

O

+n

HNO

3

=4.87+0.1936=5.06 mol

∴ MOLE fraction of HNO

3

=

Total number of moles (in soln.)

No. of moles of HNO

3

=

5.06

0.1936

=0.0383

Now, MOLALITY of HNO

3

=

Mass of solvent in gram

Moles of solute (HNO

3

)

×1000

=

87.8

0.1936×1000

=2.205 mol kg

−1

Hence, mole fraction and molality of HNO

3

, in a solution containing 12.2% HNO

3

is 0.0389 and 2.205 mol kg

−1

respectively

Explanation:

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ANSWER:

2.15$is the answer of the PERSPECTIVE

Answer:

Preparation properties of nitrogen are:-

By THERMAL decomposition of ammonium dichromate

when red CRYSTALS of ammonium dichromate are heated, a violent reaction takes place which is ACCOMPANIED by flashes of light and evolution

commercially,nitrogen is prepared by the FRACTIONAL distillation of liquid air

EXPLANATION:

तापमान की SI इकाई क्या है? केल्विन पैमाने का तापमान 0 K है। ... केल्विन तापमान 270 K है।

Answer:

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Explanation:

When solute PARTICLES dissociate in solution, i is greater than 1 (e.g. SODIUM CHLORIDE in WATER, potassium chloride in water, magnesium chloride in water). When solute particles NEITHER dissociate nor associate in solution, i equals 1 (e.g. glucose in water).

Answer:

Answer

Open in ANSWR app

(a) MEQ. of H2SO4=100×0.1=10

     Meq. of NAOH=50×0.25=12.5

H2SO4 and NaOH NEUTRALIZE each other.

Meq. of NaOH left =12.5−10=2.5

Volume of new solution =100+50=150mL

∴NNaOH left =2.5/150=0.0167

ANSWER:

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<STRONG>Explanation:

SOAPS are the sodium SALTS of carboxylic acids in long chains. Sodium salts of long-chain benzene sulphonic acids are detergents. ... Soaps have relatively WEAK cleaning action, whereas detergents have a strong cleaning effect.

ANSWER:

In the depression in FREEZING point EXPERIMENT, it is found that the vapour PRESSURE of a solution is LESS than that of pure solvent.

Answer:

Hydrogen is the first element of the periodic table. Its atomic number is 1 with one ELECTRON. This electron is present in its first shell. Hydrogen resembles both ALKALI metals as well as halogens therefore its position is SAID to be ANOMALOUS.

ANSWER:

SODIUM lauryl sulphate

Explanation:

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ANSWER:

Everybody needs

Explanation:

KINDNESS The Kindness of the blog par lakhyu chhe ke a filma mate tene ek pan filma sain karva joiye ke a filma mate tene ek pan MECH jiti lidhi hati ANE tena mate koi

EXPLANATION:

a tank is 3/7 full of water. 160 LITTERS more are REQUIRED to FILL it up. how MANY litres can the tank hold?

Answer:

After 1919, Jewish people in GERMANY were free and legally equal and often FELT more German than Jewish. Many were wealthy and successful.

But there was an undercurrent of anti-Jewish racism, called 'anti-Semitism', in Germany. Hitler appealed to this anti-Semitism by blaming the Jewish people for Germany's DEFEAT in the First World War. Nazi race-scientists incorrectly claimed that the Jewish people were sub-human.

Explanation:

where is the option.

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Answer:

But eating over spicy foods can worsen your stomach ulcers and gastritis. ... APART from that over spicy foods can cause diarrhea in few patients by irritating the gut. It ALSO decreases the sensitivity of TASTE buds so if you plan on enjoying your FAVORITE spicy DISHES for years to come, less is more."

Answer:

H

2

+

2

1

O

2

→H

2

O

1 mole of H

2

combines with a HALF mole of O

2

to form one mole of H

2

O.

The molecular WEIGHTS of H

2

, O

2

and H

2

O are 2 g/mol, 32 g/mol and 18 g/mole respectively.

2 g (1 mole) of H

2

combines with 16 g (half mole) of O

2

to form 18 g (one mole) of H

2

O.

We have 16.0 H

2

is MIXED with 16.0g O

2

Out of this, 2.0 H

2

will COMBINE with 16.0g O

2

since oxygen mass is limited.

18 g (one mole) of H

2

O will be obtained.

Explanation:

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Answer:

because GLUCOSE and starch do not ionise in water while sulfuric and acetic acid do ionise in water and release H+ IONS which make the medium acidic

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ANSWER:

PLS TELL OPTIONS  

EXPLANATION:

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ANSWER:

Lactic ACID: A byproduct of anaerobic respiration which STRONGLY contributes to muscle FATIGUE.

Answer:

KAl(SO₄)₂·12H₂O

The COMMON NAME of potash alum is FITKARI. The chemical formula for potash alum is KAl(SO₄)₂·12H₂O. Its chemical name is potassium aluminium sulphate. The common alum is potash alum or potassium alum.

Answer:

C HAI ISKA answer OKEY by the way how are you

Answer:

An organic compound A has the MOLECULAR formula C2H6O. On oxidation in air in presence of heated copper as CATALYST, it is oxidised to CH3COOH. ... Thus, compound A' cannot be an acetaldehyde and is ethyl ALCOHOL only.

Explanation:

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Answer:

C

Explanation:

the correct answer for this QUESTION is option C

-SIMILARLY in the option (D) HYDROCHLORIC acid (HCl) is given and in the AQUEOUS form it fully dissociates in the hydrogen ion and CHLORIDE ion in the following manner and comes under the CATEGORY of strong acid. From the above discussion it is clear that Acetic acid is not a strong acid.

ANSWER:

True

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Answer:

Air is a mixture of nitrogen, OXYGEN, ARGON and other gases. If one simplifies its composition, it is a mixture of nitrogen and oxygen. In a mixture, the MAJORITY COMPONENT is the solvent and the minority component(s) is the solute. Nitrogen is the solvent and oxygen (and all the other MINOR components) is the solute.

Answer:

Clarification: A salt bridge is a device used to CONNECT the oxidation and REDUCTION half-CELLS of a galvanic cell (a type of electrochemical cell). Strong ELECTROLYTES are generally used to make the salt bridges in electrochemical cells. SINCE ZnSO4 is not a strong electrolyte, it is not used to make salt bridges.

Answer:

The melting POINT is usually defined as the point at which materials changes from a solid to a liquid. The temperature at which solid changes its STATE to liquid at atmospheric pressure is called the melting point of that liquid. This is the point at which both liquid and solid phase exists at EQUILIBRIUM.

Answer:

3

because they CONTAIN ABSOLUTELY

Answer:

2 8 18 32

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ANSWER:

electronic CONFIGURATION of oxygen=2, 6,VALENCY=(-2)

electronic configuration of Nitrogen=2, 5

Valency=(-3)

electronic configuration of Berylium=2, 2

Valency=(+2)

electronic configuration of Neon=2, 8

Valency=0

Isobars are atoms of different chemical elements that have the same number of NUCLEONS. Correspondingly, isobars DIFFER in ATOMIC number but have the same MASS number. An example of a series of isobars would be ⁴⁰S, ⁴⁰Cl, ⁴⁰Ar, ⁴⁰K, and ⁴⁰Ca.

Answer:

Number of BOND pairs and lone pairs in AMMONIA molecule RESPECTIVELY are: (a) 3 and 1 (b) 3 and 2 (c) 4 and 1. (d) 3 and 0.

ANSWER:-

Percentage of SOLUTION= 5

MASS of solution= 250g

% of solution=

Mass of solution

Mass of solute

×100

∴ Mass of solute=

100

5×250

=12.5g

Answer:

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Answer:

conventionally the ELECTRODE POTENTIAL refers to

Explanation:

OPTION 4

Explanation:Valency is the combining power of an element. Elements in the same group of the periodic table have the same valency. The valency of an element is RELATED to how many electrons are in the OUTER shell. Group number.

Group

In mathematics, a group is a SET equipped with an operation that COMBINES any two elements to form a third element while being associative as well as having an identity element and inverse elements. These three conditions, called group axioms, hold for number systems and many other mathematical structures.

valancy

In chemistry, the valence or valency of an element is the measure of its combining capacity with other atoms when it forms chemical compounds or molecules.

2NH  3Pt  N 2  +3H  2

​ Rate=−  

21[  dtd[NH  3   ]  ]=[  dtd[N  2  ]  ]=+  31  [ dtd[H  2  ]  ]

As the order of the reaction is zero HENCE rate of reaction  

Rate of reaction = k

Rate of production of N  2= 2.5×10  −4molL  −1  s  −1

Rate of production OFH  2  =3×2.5×10  −4

=7.5×10  −4  molL  −1  s  −1

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Answer:

Cathode-rays is not electromagnetic in nature.

Cathode rays (electron BEAM or e-beam) are streams of electrons observed in vacuum tubes. If an evacuated glass tube is equipped with TWO electrodes and a voltage is applied, glass behind the POSITIVE electrode is observed to glow, due to electrons emitted from and traveling away from the cathode (the electrode connected to the negative terminal of the voltage supply). They were first observed in 1869 by German physicist Johann Wilhelm Hittorf, and were named in 1876 by Eugen Goldstein Kathodenstrahlen, or cathode rays.In 1897, BRITISH physicist J. J. Thomson showed that cathode rays were composed of a previously unknown negatively charged particle, which was later named the electron. Cathode ray tubes (CRTs) use a focused beam of electrons deflected by electric or magnetic fields to create the image on a television screen.

The electromagnetic force usually exhibits electromagnetic fields such as electric fields, magnetic fields and light, and is one of the four fundamental INTERACTIONS (commonly called forces) in nature. The other three fundamental interactions are the strong interaction, the weak interaction and gravitation.

Answer:

"The gradual EATING up of metals by ACTION of AIR, moisture or a chemical reaction (such as an acid) on their surface is called corrosion. The most COMMONLY seen example of corrosion of metals is rusting of iron i.e the FORMATION of a brown flaky substance on iron objects on exposure to moist air."