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Answer:

Hard water... is water that contains an appreciable quantity of dissolved MINERALS (LIKE calcium and MAGNESIUM).

Soft water... is treated water in which the only ION is sodium.

Explanation:

ANSWER:

C6H12O6 + 6O2 GIVES 6CO2 + 6H2O............

Answer:

Coversion of methyl chloride into methyl fluoride is KNOWN as SUBSTITUTION reaction.

Substitution reaction is a reaction WHEREIN an ATOM is replaced by ANOTHER atom or a group of atoms.

Here, chlorine is getting replaced by fluorine.

ANSWER:

amartya sen.

Explanation:

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ANSWER: when BENZENE is reacted with excess of chlorine in presence of sunlight. It under go substitution reaction and SUBSTITUTE all the POSITION of benzene and lead to formation of benzene hexachloride.

Explanation:

Answer:

PARTICLES. of SOLUTION have size less than 1 nanometre that is 10^-9 METRE

ANSWER:

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MASS NUMBER will be 39 of the ATOM....

Answer:

zymase and INVERTASE are ENZYMES which they are bio catalyst of a particular REACTION whereas lactobacillus is a group of microorganism.

Answer:

7 and some compounds

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ANSWER:

to PREVENT IRON from RUSTING

EXPLANATION:

it FORMS IONIC bond,so it's mp and bp is HIGH

Answer:

Combination reaction: when two reactants combine to FORM ASINGLE product

decomposition reaction:when reactant decompose into two or more products

displacement reaction: when an ELEMENT is DISPLACED by other

double displacement reaction: when there is displacement of IONS

Answer:

EXPLANATION:

As by the EQUATION of bohr`s energy equation E=-13. 6*Z^2/n^2

Hydrogen ATOM Z=1 and for n=5

E=-.0.544ev.

CAFFEINE is USED in COFFEE.

Answer:

During copper plating of an iron KEY, copper METAL is transferred from the copper PLATE to the iron key through the copper SULPHATE solution. During ELECTROPLATING with copper, copper metal gets transferred from positive electrode to the negative electrode.

Iron(II) sulfide or FERROUS sulfide (Br.E. sulphide) is one of a family chemical compounds and minerals with the approximate formula FeS. Iron sulfides are often iron-deficient non-stoichiometric. All are BLACK, water-insoluble solids.

a THING that is COMPOSED of two or more separate ELEMENTS; a mixture.

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ANSWER:

carbon has a unique ability to form strong covalent bonds with other carbon ATOM, this RESULT in formation of BIG molecules. this property of carbon is called catenation power.

Explanation:

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They are prepared from WATER SOLUBLE salts. They provide ENOUGH nutrients for the proper development of crops. VARIOUS examples of chemical fertilizers are sulphate, ammonium phosphate, potassium sulphate, ETC. They provide various types of nutrients like nitrogen, potassium, etc.

ANSWER:

these are the examples of Covalent hydrides

Explanation:

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ANSWER:

REASON is INCREASE in NUCLEAR CHARGE

Abnormal PULMONARY density DISCOVERED on ROUTINE chest radiograph. ... Posteroanterior radiograph of the chest DEMONSTRATES an abnormal density (arrows) in the inferior portion of the LEFT lung.

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ANSWER:

because they are BASIC and are ACTING as a BASE on the REACTANTS..

Answer:

1.Henry Cavendish

2. 1.water has no definite mass and volume

3.The Dead Sea is famous throughout the world for being the owner of a unique and surprising talent: its high amount of SALT FAVORS the flotation of large objects.

It is located between the borders of Jordan, Israel and the West Bank. In addition, it is considered the lowest point on the planet, 400 meters below sea level. The Dead Sea is divided into two large basins separated by a land bridge. The first of them measures almost 50 kilometers in length, while the second barely reaches twelve. Together, they exceed 400 meters deep.

As we mentioned above, this sea has a good dose of salt among its components, about 340 grams per liter. Why does this happen? Experts say it is due to the strange COMBINATION of two factors: the amount of fresh water it RECEIVES from the tributaries is not enough to cope with the evaporation of salt water. This is composed of several mineral salts that also ENHANCE the flotation: sodium chloride, potassium chloride, magnesium chloride and calcium chloride, among others.

4.Fe2O3.xH2O

5.Hydrated salt- A hydrated salt is a crystalline salt molecule that is loosely attached to a certain number of water molecules. Salt is created when an acid's anion and a base's cation are combined to produce an acid-base molecule. ... In a hydrated salt, the water molecules are incorporated into the crystalline structure of the salt.

Anhydrated salt- The word “anhydrous” means without water. An anhydrous salt is only the cation and anion making up the salt. There is no water of hydration. Many salts naturally draw water from the environment and occur in nature as hydrated salt.For every every formula unit of copper II sulfate there are five water molecules.

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Answer:

PLANT more than more trees

decrease carbon emissions from AUTO MOBILE

decrease in industrial effluent

by USING renewable ENERGY

• EXPLANATION:

so the ANSWERS is ALSO PROVE

Yes , The statement is TRUE

With the addition of more and more ELECTRONS in more and more shells , It becomes EASIER for the NUCLEUS to remove its outer electrons , resulting in METALLIC character

ANSWER:

The equilibrium STATE can only be reached if the chemical REACTION takes place in a closed system. Otherwise, some of the products may ESCAPE, leading to the absence of a reverse reaction. (Note that in the diagrams under "CHARACTERISTICS of Chemical Equilibrium," all reactions are in closed systems.)

Answer:

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Explanation:

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Answer:

It's OPTION B.. Number of Mg2+ IONS are half that of CL- as they are in ratio 1:2

Explanation:

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Answer:

By KEEPING the WATER flowing, the hot or warm water is taken away and replaced by more cold water, so more vapour can condense. ... A simple distillation CONSISTS of a boiler which converts a LIQUID mixture into vapour, sometimes a column which helps in separation, and a CONDENSER to turn the vapour back into liquid.

Explanation:

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Answer:

Many fuels has the given temp.

Explanation:

Different hydrocarbon chain lengths all have progressively higher boiling points, so they can all be separated by distillation. This is what happens in an oil refinery - in one part of the process, crude oil is heated and the different chains are pulled out by their vaporization temperatures. Each different chain length has a different property that makes it useful in a different way.

To understand the diversity contained in crude oil, and to understand why refining crude oil is so important in our society, look through the following list of products that come from crude oil:

PETROLEUM gas - used for heating, cooking, making plastics

small alkanes (1 to 4 carbon atoms)

commonly known by the names methane, ethane, propane, butane

boiling range = less than 104 degrees Fahrenheit / 40 degrees Celsius

often liquified under pressure to create LPG (liquified petroleum gas)

Naphtha or Ligroin - intermediate that will be further processed to make gasoline

mix of 5 to 9 carbon atom alkanes

boiling range = 140 to 212 degrees Fahrenheit / 60 to 100 degrees Celsius

Gasoline - motor fuel

liquid

mix of alkanes and cycloalkanes (5 to 12 carbon atoms)

boiling range = 104 to 401 degrees Fahrenheit / 40 to 205 degrees Celsius

Kerosene - fuel for jet engines and tractors; starting material for making other products

liquid

mix of alkanes (10 to 18 carbons) and aromatics

boiling range = 350 to 617 degrees Fahrenheit / 175 to 325 degrees Celsius

Gas oil or Diesel distillate - used for diesel fuel and heating oil; starting material for making other products

liquid

alkanes containing 12 or more carbon atoms

boiling range = 482 to 662 degrees Fahrenheit / 250 to 350 degrees Celsius

Lubricating oil - used for motor oil, grease, other lubricants

liquid

long chain (20 to 50 carbon atoms) alkanes, cycloalkanes, aromatics

boiling range = 572 to 700 degrees Fahrenheit / 300 to 370 degrees Celsius

Heavy gas or Fuel oil - used for industrial fuel; starting material for making other products

liquid

long chain (20 to 70 carbon atoms) alkanes, cycloalkanes, aromatics

boiling range = 700 to 1112 degrees Fahrenheit / 370 to 600 degrees Celsius

Residuals - coke, ASPHALT, tar, waxes; starting material for making other products

solid

multiple-ringed compounds with 70 or more carbon atoms

boiling range = greater than 1112 degrees Fahrenheit / 600 degrees Celsius

You may have noticed that all of these products have different sizes and boiling ranges. Chemists take advantage of these properties when refining oil. Look at the next section to find out the details of this fascinating process.

Answer:

MONOSODIUM xenate is the SODIUM salt of xenic acid with FORMULA NaHXeO4·1.5H2O. It is a powerful oxidizer. It is a highly reactive compound of xenon.

Chemical formula: NaHXeO4•1.5H2O

Molar MASS: 241.27 g/mol

Main hazards: extremely unstable, vigorous oxidizer

ANSWER:when we look into the equation of there REACTION, we have see that they react in equal MOLES, moles of H2SO4= moles of Na2co3.

EXPLANATION:

The antibiotic DRUG AMONG the given OPTION is :

• Penicillin was discovered by Alexander Fleming from the fungus Penicillium Notatum.

• It was one of the first discovered antibiotics.

• Since then, a number of chemical modifications has been applied to penicillin to make it more effective (for example: INCREASED anti-bacterial SPECTRUM).

• Penicillin is used in Syphilis, RTI (respiratory tract infections), Throat Infections, Meningitis, etc.

• It acts by prevention of bacterial cell wall formation by inhibiting the cross-links between the peptidoglycan chains.

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ANSWER:

I)expected weight of ethanoate = (5.3+6)-(2.2+0.9)

=11.3- 3.1

= 8.2

(law of conservation of MASS)

II)molar mass of s8=32×8

=256 g

no of moles = 256/16

no. of molecules = 6.022 × 10^23 ×256/16

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Explanation:

Synthetic POLYMERS are man-made, PREPARED in laboratories or industries from CHEMICAL substances. Examples of synthetic polymers include NYLON, terylene, polythene etc. On the other hand, proteins, starch, cellulose and nucleic acid are natural polymers.

Explanation:

the FORMATION of SALT from acid and BASE are CALLED neutralization REACTION.

ANSWER:

most basic level, a kaleidoscope is made of TWO or more mirrors or reflective surfaces POSITIONED at an ANGLE to each other, usually forming a V-shape or a triangle. ... A collection of OBJECTS is positioned at one end of the mirrors, and there's an eyehole at the other end.

ANSWER:

HELLO!

Check out the attachment for the SOLUTION! I've TAKEN that the solution is DILUTE, because only 13g of solute is dissolved in 100g of water.

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Answer:

2Ca(OH)2 + 2Cl2 → Ca(CLO)2 + CACL2 + 2H2O.

Explanation:-

Calcium hydroxide REACT with chlorine toproduce calcium gipochlorite, calcium chlorideand water.

ANSWER:

ATOMIC NUMBER will be 10

Answer:

NaHCO3 RELEASES CO2 and H2O on heating. FOLLOWING is the balanced REACTION:

2NaHCO3(s) = Na2CO3(s) + CO2(G) + H2O(g).