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ANSWER:

CO2 + CA (OH )2 -> CACO3 + H20

Explanation:

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ANSWER:

can you ASK the QUESTION CLEARLY

Answer:

SULPHUR ATOMIC number is 16 and it's valency CONFIGURATION is 2,8,6

ANSWER:

Yes gases can be STORED in a CLOSED CONTAINER .

Explanation:

Gases can be stored in a closed container by compressing by APPLYING required pressure.

Answer:

TWO ALLOYS WITH IT'S PROPERTIES :-

(1) Bronze ( Cu + Sn) : Excellent SHOCK resistant.

(2) Brass ( Cu + Zn) : Used in electrical applications and musical INSTRUMENTS such as BELL.

Answer:

In THERMODYNAMICS, the Joule–Thomson effect (also KNOWN as the Joule–Kelvin effect or Kelvin–Joule effect) describes the temperature change of a real gas or liquid (as differentiated from an ideal gas) when it is forced through a VALVE or porous plug while keeping it INSULATED so that no heat is EXCHANGED with the environment .

Answer:

1. Silicones are a type of SYNTHETIC polymer, a material made of SMALLER, REPEATING chemical units called monomers that are bonded TOGETHER in long chains.

2. The preparation of silicones is carried out by the hydrolysis of dialkyldichlorosilanes or diaryldichlorosilanes. These dichlorosilanes are prepared by passing the vapours of RCl or ArCl over SILICON at 570K with the catalyst copper.

Answer:

METAL are loss the PROPERTY when its heated or through WATER.

ANSWER:

3.4 is CORRECT answer

EXPLANATION:

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a) SODIUM SALTS of fatty acids is the correct OPTION.

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Answer:

Ethanoic acid

Explanation:

the melting point of pure ethanoic acid is 290 KELVIN and hence it often freezes during winter in COLD CLIMATES this give rise to its name glacial acetic acid.

(B) CLOVE OIL

as it is an OLFACTORY INDICATOR.

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Explanation:

1

Secondary School  Science  15 points

Explain how the concentration of nitrogen remains constant in the atmosphere ?

Ask for details  Follow  Report by Edwerd9520 30.03.2018

Answers

Me · Beginner

Know the answer? Add it here! 

zakir02  Ambitious

The percentage of nitrogen in atmosphere is kept constant through nitrogen CYCLE.

The sequence in which nitrogen in the atmosphere is passed into the soil and life forms, and then released back into the atmosphere, is called the nitrogen cycle. 

a) Nitrogen FIXATION: The process of conversion of atmospheric nitrogen into nitrogenous compounds and making it AVAILABLE for plants is called as nitrogen fixation. Nitrogen fixation can happen by biological processes or physical processes. Nitrogen is introduced to the soil by fertilisers or animal and plant residues.  

b) Ammonification: The process of production of ammonia from organic compounds is called ammonification. Ammonification is the process carried out by a variety of microorganisms that breakdown protein, amino acids, and other nitrogen-containing compounds of dead and waste organic matter to form ammonia.

c) Nitrification: It is the process by which ammonia is converted to nitrites (NO2-) and then to nitrates (NO3-).  This process naturally occurs in the environment, where it is carried out by specialised bacteria. Nitrosomonas and nitrobacter are the bacteria which bring about nitrification.

d) Denitrification: It is the biological conversion of nitrate to nitrogen gas, nitric oxide or nitrous oxide.  These compounds are gaseous compounds and are not readily available for microbial growth. Therefore, they are typically released into atmosphere. This process is brought about by denitrifying bacteria.  

ANSWER:

I don't UNDERSTAND this QUESTION

FIND the PRODUCT FORMED in how MUCH TIME

ANSWER:

ETANOL: CH3CH2OH

ethanoic ACID: CH3COOH

Explanation:

Answer:

MOLAR CONDUCTANCE = specific cond. × 1000/molarity

Explanation:

hope the answer will HELP you

HEYY heres your answer

Pent - 1 - ene - 3 - OL. 

ANSWER:

hydrogen is produced when METAL REACT with HCL

for example mg+ hcl- mgcl2+h2

Answer:

Melting point of a solid is defined as the TEMPERATURE at which a solidchanges into a LIQUID. Melting point of a solid indicates the strength of the force of ATTRACTION between the particles of the solid. ... As the PRESSURE on the substance INCREASES, the melting point decreases.

Answer:

PLEASE FIND the attachment given below for answer.

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ANSWER:

ALCOHOL FORMED in the PRODUCT

ANSWER:

generally on moving TOP to BOTTOM in periodic table IP decreases.

Moving from left to right EN increases

SORRY I don't KNOW the ANSWER.

ANSWER:

SEE the image

Explanation:

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Answer:

PLZ give your options so that I COULD CHOOSE ONE of them

Answer:

hi mate here is your answer

that why trichoro methane stored in dark brown(っ˘з(˘⌣˘ )♥╣[-_-]╠♥

Explanation:

Chloroform is slowly oxidised by air in the presence of light to an extremely poisonous gas PHOSGENE. Thus it is stored in CLOSED dark coloured BOTTLES completely filled so that air is kept out.

(Chloroform)

2CHCl

+O

2

Sunlight

2HCl+

(Phosgene)

2COCl

PLZ MARK IT AS BRAINLEST ANSWER PLZ

2

Answer:

Correction in the question : 3 molecules of CO2, weighs?

SOLUTION

Number of moles = Given mass / MOLAR Mass = Number of molecules / NA( Avagadro number)

Mass = 3 × 44 / 6.02 × 10^23

Mass = 21.9 × 10^(-23)

Mass = 22 × 10^(-23)

OPTION (d) is the correct answer.

ANSWER:

Explanation:

MAINLY THREE mechanisms

initiation:-

CH4 +Cl2

ANSWER:

Your QUESTION itself is wrong, it should be Al(OH)3 not 2

Explanation:

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Answer: mark as brainliest and follow me plz

Explanation: The single combination of pressure and temperature at which LIQUID water , solid ice, and water vapor can COEXIST in a stable equilibrium occurs at EXACTLY 273.16 K (0.01 °C; 32.02 °F) and a partial vapor pressure of 611.657 pascals (6.11657 MBAR; 0.00603659 atm).

ANSWER:

STOP POLLUTING the AIR

ANSWER:

see in the image if it helps you PLEASE MARK as BRAINLEST answer

ANSWER:

the answer will be barium chloride

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ANSWER:

d . DEHYDRATION REACTION

Answer:

correct OPTION is B

As aluminium is the most REACTIVE metal and a suitable REDUCING agent

ANSWER:

BA(NO3)2 + (NH4)2SO4 ——>BASO4 + 2NH4NO3

Answer:

In chemical nomenclature, the IUPAC nomenclature of organic chemistry is a method of organic chemical compounds as recommended[1] by the International UNION of Pure and Applied Chemistry (IUPAC). It is published in the Nomenclature of Organic Chemistry (informally called the Blue Book). Ideally, every possible organic compound should have a name from which an unambiguous structural formula can be CREATED. There is also an IUPAC nomenclature of inorganic chemistry.

To avoid long and tedious names in normal communication, the official IUPAC naming recommendations are not always followed in practice, except when it is NECESSARY to give an unambiguous and ABSOLUTE definition to a compound. IUPAC names can sometimes be simpler than older names, as with ethanol, instead of ethyl alcohol. For relatively simple molecules they can be more easily UNDERSTOOD than non-systematic names, which must be learnt or looked over. However, the common or trivial name is often substantially shorter and clearer, and so preferred. These non-systematic names are often derived from an original source of the compound. In addition, very long names may be less clear than structural formula.

Explanation:

please mark as brainlest answer

Your ANSWER is in the ATTACHMENT
HOPE it HELPS you !!!!!!

Answer:

AMYLASE is the enzyme which acts on carbohydrates.

It will have no EFFECT on proteins EVEN if it is mixes with it.

The enzymes which act on protein are PEPSIN and TRYPSIN.

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Thanx

ANSWER:

PH+POH =14 , poh = 2-log6 , poh = 2-0.77=1.23 ph= 12.77 APPROX

Answer:

Please check attachment

Explanation:

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Answer:

Ink is a mixture of several dyes and therefore we can SEPARATE those colors from one another using chromatography. When ink is exposed to certain solvents the colors dissolve and can be seperated out. When we expose a piece of paper with ink on it to a solvent, the ink spreads ACROSS the paper when the ink dissolves.

You can remove ink through Chrromatography by FOLLOWING the steps :-

1.    Take a thin strip of FILTER paper.
2. Draw a line on it using a pencil approx. ...
3. Put a small drop of ink with HELP of a pen at centre of line and let it dry.
4. Lower the filter paper into a glass jar containing water in such a way that the ink's drop remains just above the water level. ...
5. Water rises up in the filter paper.

Answer:

Precision glass moulding is a replicative process that ALLOWS the production of high precision optical COMPONENTS from glass without grinding and POLISHING. The process is also known as ultra-precision glass pressing. It is used to manufacture precision glass lenses for consumer products such as digital cameras, and high-end products like medical systems. The main advantage over mechanical lens production is that COMPLEX lens geometries such as aspheres can be produced cost-efficiently.

it is in LIQUID to solid state

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CHEMICAL EQUATION is REPRESENTAION of chemical REACTION..

Answer:

yes

Explanation:

because on MOVING from left to RIGHT along period is the increasing PROCESS of atomic NUMBER and atomic mass.

Answer:

Methyl chloride (CH3Cl) contains only hydrogen atoms on the reactive carbon atom bearing CHLORINE whereas ethyl chloride (CH3CH2Cl) has an additional methyl group attached there which being larger than hydrogen HINDERS direct attack at that position more. However ethyl chloride can also UNDERGO elimination of hydrogen chloride (HCl) from the adjacent methyl group to yield ethylene so the relative reactivities of these two alkyl chlorides depends upon the reaction CONDITIONS applied.

ANSWER:

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Answer:

answer is OPTION B

REDUCTION of NA IONS