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Answer:

the major difference between distilled and dimineralized WATER is that distilled water usually have less organic CONTAMINANTS, deionisation does not remove uncharged molecules such as viruses, bacteria. DEMINERALIZED water most time have less mineral ions, this is dependent on the way it is PRODUCED.

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Modern PERIODIC Law of element may be defined as the Physical and chemical PROPERTIES of the elements are periodic functions of their atomic numbers

It means when the elements are arranged in the ORDER of their INCREASING atomic numbers it is observed that the elements of SIMILAR properties recur at regular intervals or periodically

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Here is the SOLUTION..

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The CORRECT OPTION is

(D) 7.525 X 10²³ Br atoms

Answer:

the atomic radius increases from top to bottom in a group, and decreases from LEFT to RIGHT across a PERIOD. Thus, helium is the smallest element, and FRANCIUM is the largest.

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ANSWER:

a is CORRECT answer

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Answer:

BRASS gets discoloured DUE to the presence of HYDROGEN SULPHIDE.

Explanation:

HOMOGENEOUS Series :

It is a series of compounds which are DERIVED from same general formula, having same functional GROUP, similar chemical PROPERTIES and show gradation in physical properties. Each member differs from successive member by – CH2 – .

Explanation:

The Dietary GUIDELINES for Americans recommends that CARBOHYDRATES make up 45 to 65 percent of your TOTAL daily calories. So, if you get 2,000 calories a DAY, between 900 and 1,300 calories should be from carbohydrates. That translates to between 225 and 325 grams of carbohydrates a day.

EXPLANATION:

Mono- and disubstituted methyltin, butyltin, and octyltin COMPOUNDS. ...... LARGELY specific for the different organotins. Thus ... here are used as stabilizers in PVC or as CATALYSTS for the

ANSWER:

SORRY

.....

............m..m.

ANSWER:

FIRST U WROTE your QUESTIONS

The general decomposition reaction can be written as given below;

AB → A + B

For example; the electrolysis of water results the formation of oxygen and hydrogen gas involves the decomposition;

2 H2O → 2 H2 + O2

Similarly the decomposition of solid potassium chloride results the formation of solid potassium with gaseous chlorine molecule.

The chemical reaction can be written as given below;

2 KCl(s) → 2 K(s) + Cl2(g)

Overall it is a type of chemical reaction which can be DEFINED as the reaction which involves the splitting of a single compound into two or more simple substances under certain reaction conditions.

We can consider it as the opposite reaction of the combination reaction. A combination reaction involves the combination of two or more simple substances to form a new bigger chemical substance.

The digestion of food in human body is also an example of decomposition reaction in which the major constituent parts of food materials such as CARBOHYDRATES; fats etc. decompose to form simple compounds with a certain amount of energy.

This energy is used in other metabolic activities of living bodies. Such types of reactions can be classified as thermal, electrolytic, and photo decomposition reaction.

The thermal decomposition reaction is also known as thermolysis in which a single substance decomposes into 2 or more parts to form simple substance in the PRESENCE of heat.

Such reactions are endothermic in nature as they require some heat to cleave the chemical bonds found in the chemical substance.

For example; the decomposition of CaCO3 results the formation of CaO (calcium oxide) and CO2 (carbon dioxide) at high temperature.

The reaction can be written as given below;

CaCO3(s) --> CaO(s) + CO2(g)

Similarly the decomposition of potassium chlorate (KClO3) at high temperature results the formation of solid potassium chloride and oxygen gas. Same reaction is used for the preparation of oxygen gas.

2KClO3(s) --> 2KCl (s) + 3O2(g)

This reaction can be carried out in the presence of catalyst MnO2 at low temperature.

The decomposition of ferric hydroxide at high temperature results the formation of ferric oxide with water.

Similarly the thermal decomposition of hydrated oxalic acid removes the water content from molecule to form anhydrous oxalic acid.

(COOH)2. 2H2O --> (COOH)2 + 2H2O

Another type of decomposition is electrolytic decomposition which is also known as electrolysis.

This reaction takes place in presence of electric current in the aqueous solution of the sample. The electrolysis of water is the best example of electrolysis.

The decomposition takes place by passing electric current through it. The reaction can be written as given below;

2H2O (l) --> 2H2(g) + O2(g)

Metallic salts such as sodium chloride can also electrolyzed to form molten sodium with chlorine gas on passing electricity in the molten sodium chloride.

The photolysis or photo decomposition reaction involves the cleavage of given chemical compound in the presence of LIGHT

ANSWER:

hii

Explanation:

what is UR QUESTION DEAR.

Explanation:

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Concept :

1. all non - zero digits are significant .

2. zeros present to left /right of a number are non - significant however zero present after decimal POINTS are significant .

3. zeros present between two non - zero digits are significant .

(i) 0.0025

according to rule 2 , there are 2 significant figure in 0.0025.

(ii) 208

according to rule 1 and 3 , there are 3 significant figures in 208.

(iii)5005

according to rule 1 and 3, there are 4 significant figures in 5005.

(iv) 126000

according to rule 2,there are 3 significant figures in 126000.

(v) 500.0

according to rule 2 , there are 4 significant figures in 500.0

(vi) 2.0034

according to rule 2, there are 5 significant figures in 2.0034

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ANSWER:

ATOMIC no. from 1 to 30 are - 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30

Answer:

IRON(III) chloride or Ferric chloride (FeCl3) is a compound that is GENERALLY available as hexa-hydrate salt.

When it is heated, hydrolysis occurs and hydrogen chloride GAS is evolved.

Hydrates of Iron(III) chloride cannot be dehydrated to ANHYDROUS form, because it decomposes to iron(III) oxychloride and hydrogen chloride (HCl) gas, upon heating.

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Explanation:

By volume, dry air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases. Air ALSO contains a VARIABLE amount of WATER vapor, on average AROUND 1% at sea level, and 0.4% over the entireatmosphere.

Explanation:

1 it will gets barium HYDROXIDE (Ba OH) + SODIUM chloride (NACL)

ANSWER:

SEND the FULL QUESTION

ANSWER:

• AL(CO3)3+HCl+H2SO4

Explanation:

AL2(HCO3)3+HCl+H2SO4

ANSWER:

CA(HCO3)2+2Hcl --------->Cacl2+2H2o+2co2

ANSWER:

I don't KNOW PLEASE answer my QIESTION

Answer:

His work is also known for its INFLUENCE on the philosophy of science. He is best known to the GENERAL public for his mass–energy EQUIVALENCE formula E = mc2, which has been dubbed "the WORLD's most famous equation".

answer : n1 = 4 and N2 = 6

formula of wave number is given by,

where R is Rydberg's CONSTANT, Z is ATOMIC number, are transition of electron from first to second respectively.

for first balmer series,

n1 = 2 and n2 = 3

and Z of hydrogen ATOM is 1.

so, wave number = R(1)² [ 1/2² - 1/3²] = 5R/36....(1)

now for He^+ , Z = 2

and then wave number , = R(2)² [ 1/n1² - 1/n2²] ....(2)

a/c to question,

wave number of He^+ = wave number of first line in balmer series of H - atom

or, 5R/36 = 4R[1/n1² - 1/n2² ]

or, 5/144 = [1/n1² - 1/n2²]

or, (1/4² - 1/6² ) = [ 1/n1² - 1/n2²]

on comparing both sides,

n1 = 4 and n2 = 6

ANSWER:

if you are ASKING PERCENTAGE of WINE so it is 80%

Explanation:

Electron in HYDROGEN atom FIRST JUMPS from third excited STATE to second excited state and then from second excited to the first excited state. The ratio of the wavelengths λ1:λ2 emitted in the two CASES is 20/7

ANSWER:

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When more and more population arises,then the demand of resources too arises.So,more and more natural resource is provided to the population depending on their needs.

For eg--Water is NEEDED by EVERYONE .Once the demand for water will arise.More and more is needed to FEED the Population.Hence,it leads to their depletion.

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ANSWER:

CHEMICAL change

EXPLANATION:

because in a chemical change the basic PROPERTIES of a SUBSTANCE is changed

VAPOUR CLOUD COLLECTS WATER from RIVERS

ANSWER:

SOLUTIONS having same OSMOTIC pressure at a given TEMPERATURE

ANSWER:

HEYY buddy, here's your answer:

1)D.Ammonium chloride

2)REFER the image

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The (c) option is right.

The CORRECT ORDER of the acidity is

HI>HBr>HCl>HF

This is due to that the bond energy of the HI is lowest so it will EASILY lose the H ion.

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Answer:  108 g/mol.

Explanation:

According to AVOGADRO's LAW, 1 MOLE of every substance weighs equal to the molecular mass and contains avogadro's number of particles.

Given:

1 atom of an element weighs equal to

Thus  to know the atomic weight , we need to FIND the weight of avogadro's number of particles.

Thus 1 atom of an element weighs=

atoms of a element weigh=

The atomic weight of element is​ 108 g/mol.

Which of the FOLLOWING MOLECULE is paramagnetic

A) F2

B) O2✔✔✔

C) N2

D) C2

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ANSWER:

I DISPLACEMENT

2 displacement

3 displacement

4 displacement and exothermic

5 displacement

6 DECOMPOSITION

ANSWER:

FE

Explanation:

human beings learn the use of FE METAL first

Given:

Molarity of the solution (M1) = 5 M

Volume of the Solution (V1) = 500 ML

Volume of the Solution (V2) = 1500 ml

To Find:

Molarity of solution 2

Formula used to find the answer:

M1V1 = M2V2

Substituting the VALUES KNOWN to us in this formula we GET:

(5) (500) = (1500) M2

2500 = 1500(M2)

M2 = 2500 / 1500

M2 = 1.66 M

Therefore, 1.66 is the molarity of the solution obtained if 500 ml of a 5 M solution is diluted in 1500 ml.

ANSWER:

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ANSWER:

Answer is 2

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Answer:

3 bescause PI of ONE is BOUNDED with it and then if we will:

2×3=6

6/2=3

HENCE,PROVED✌✌✌

Definition: The solutions that obey RAOULT' s law over the ENTIRE range of concentration are called ideal solutions. ...

Characteristics: For ideal solutions: Enthalpy of mixing (mixH) of the pure components to FORM the SOLUTION is zero.

Answer:

HELLO Dear User__________

Here is Your Answer...!!

____________________

Difference between ionic and covalent compounds

• Ionic COMPOUND form by transfer of ELECTRON where as covalent compound form by SHARING of electrons.
• Ionic compound form from metal and non metal where as covalent compound form non metal and non metal.
• Ionic compound has HIGH melting and boiling point where as covalent compound has low.

Answer:

COBALT :- CO

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Which of the FOLLOWING COMPOUNDS has ELECTROVALENT LINKAGE?

=> CH3C1

CU + 2HNO3 - CUTE(NO3) 2 + 3NO2 + 2H2O

ANSWER:

No!!!

CAN you GIVE any EXAMPLE of this SITUATION....

EXPLANATION:

HELLO!!!

VITAMIN B-12 CONTAINS cobalt

option A is CORRECT

Answer:

11-Jun-2018 · 1 answer

The relative number of ATOMS of x, y and Z are 2, 1 and 0.5, ... is 400 g) Find out. i) The atomic

Explanation:

The FORMULA defining the energy levels of a Hydrogen ATOM are given by the equation: E = -E0/n2, where E0 = 13.6 eV (1 eV = 1.602×10-19Joules) and n = 1,2,3… and so on. The energy is expressed as a negative number because it takes that much energy to UNBIND (IONIZE) the electron from the NUCLEUS.