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Lithium chloride is a chemical compound with the formula LiCl. The salt is a TYPICAL ionic compound, although the small size of the Li+ ion gives rise to properties not seen for other alkali METAL CHLORIDES, such as extraordinary solubility in POLAR solvents (83.05 g/100 mL of water at 20 °C) and its HYGROSCOPIC properties.[5]

ANSWER: ACIDIC SUBSTANCES have ph below 7 and basic has above 7

Explanation: NEUTRAL substances have ph 7

ANSWER:

with what.. PLEASE WRITE PROPER QUESTIONS

ANSWER:

AL2( SO4)3... This is the FORMULA

CACO3 (s) ---> CAO (s) + CO2 (g) All metal carbonates decompose to give the metal OXIDE and carbon dioxide. As calcium ions has a 2+ charge, the formula of calcium carbonate will Be CaCO3 (as carbonate is a 2- ion).

Answer:

MOLAR MASS of Sodium = 23g/mol

PERCENTAGE of Na in METHYL orange molecule = 7

Let the Sodium salt of methyl orange = x

x×7100=23

x=23×1007

x=328.57

Answer:

Rotting of mango is a CHEMICAL CHANGE because-

1. It is irreversible.

2.It CHANGES the chemical properties of the SUBSTANCE ,which is mango.

3.A new PRODUCT is formed.

ANSWER:

Because FeCl3 is more ionic than ALCL3 due to the difference in electronegativity between Fe & CL , and Al & Cl as we know that difference in electronegativity between Fe & Cl (1.33)is SMALLER so the more covalent bond will be and hence it is more soluble in organic solvents.

OR

Organic solvents like Diethyl ether has PARTIAL negative and partial positive charges. The two different charges do not cancel each other out, but provide the molecule with distinct charges at different sections. As a result, it cannot dissolve ionic or non-polar molecules.AlCl3 readily accepts electrons from other atoms, in an attempt to get a full valence shell of eight electrons. That's why it generally behaves as a Lewis acid. In the reaction below, the Al atom accepts a lone pair of electrons from a Cl atom. This completes its octet and forms the AlCl-4 ion.As AlCl-4 is forming ion it is not soluble in diethyl ether! Same is not in case of FeCl3.

Answer:

3.ALN+3H20 ARROW MARK AL(OH)3+NH3

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The Indian constitution, in 1950, declared Hindi in Devanagari SCRIPT to be the official language of the UNION. ... As a RESULT, PARLIAMENT enacted the Official LANGUAGES Act, 1963, which provided for the continued use of English for official purposes along with Hindi, even after 1965.

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Answer:

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It is mostly shown in chemical equations by appending (aq) to the relevant chemical formula. For EXAMPLE, a solution of table SALT, or sodium chloride (NaCl), in water would be represented as Na+(aq) + Cl−(aq). ... If the substance LACKS the ABILITY to dissolve in water the molecules form a precipitate.

<STRONG>Answer:

Solids have definite SHAPE and VOLUME because their ATOMS and molecules are held together firmly by the strong inter-molecular forces.

Answer:

Alcohols and phenols are formed when a hydrogen atom in a HYDROCARBON, aliphatic and aromatic respectively, is replaced by –OH group. ... The SUBSITUTION of a hydrogen atom in a hydrocarbon by an alkoxy or aryloxy group (R–O/Ar–O) YIELDS another class of compounds known as 'ethers', for example, CH3OCH3 (DIMETHYL ether).

ANSWER:

ACID is SLOWLY ADDED to WATER

The main difference between mineral acid and organic acid is that mineral acids are INORGANIC compounds COMPOSED of DIFFERENT chemical element combinations whereas organic acids are organic compoundsessentially composed of CARBON and HYDROGEN atoms.Ex:- Hydrochloric acid, sulfuris acid, hydrofluoric acid, nitric acid.

acetate is ethanoic acid with its hydrogen TAKEN due to which it acquires a negative charge (to which U r CONSIDERING VALENCY)

Answer:

it is a symbolic representation of the chemical reaction in the form of symbols and FORMULAS ,WHEREIN the REACTANT entities are given on the left hand side and the product entities on the right hand side.

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Answer:2.5 MOLES

Explanation Moles=No. of atoms/AVAGADRO's no

thus,for HYDROGEN ,

5=n/6.022*10^23

n=30.11*10^23

Similarly,

n for Oxygen=48.17*10^23

We know hydrogen COMBINES with oxygen in 2:1 ratio.

Thus H20 formed=30.11*10^23/2 atoms

i.e.15*10^23 atoms

convert it into moles by dividing by avagadro's no.

moles=2.5

Answer:

ATOMIC no. of Element X = 4

Electronic configuration of Element X = (2,2)

NAME of the Element = BERYLLIUM

ANSWER:

..................................

ANSWER:

CARBONDIOXIDE

CHEMICAL FORMULA:CO2

HOMOGENOUS and HETEROGENEOUS MIXTURE

Explanation:

In general GASES can be liquefied by one of three METHODS : 1. by compressing the gas at temperatures LESS than its critical temperature , in this approach, the application of pressure alone is sufficient to CAUSE a gas to change to liquid .

For EXAMPLE- ammonia has a critical temperature of 271°F ( 133°C ).

Answer:

Explanation:

Metals and Non-metals

Metals can be distinguished from non-metals on the basis of their physical and chemical properties. RECALL that lustre and hardness are physical properties.You are familiar with a number of materials like iron, aluminium, copper, ETC. Some materials have been given in Table. Metals are used in making MACHINERY, automobiles, aeroplanes, buildings, trains, satellites, gadgets, cooking utensils, water boilers, etc.

Appearance and Hardness of materials

Object /Material Appearance Hardness

Iron Shiny Very hard  

Coal Dull Not very hard

Sulphur Dull Not very hard

Aluminium Shiny Very hard

Copper Shiny Very hard                                                                             Physical Properties of Metals and Non-metals

Take a small iron nail, a coal piece, a piece of thick aluminium wire and a pencil lead. Beat the iron nail with a hammer. (But take CARE that you don’t hurt yourself in the process). Try to hit hard. Hit hard also the aluminium wire. Then repeat the same kind of treatment on the coal piece and pencil lead. Record your observations in a Table.

The shape of the iron nail and the aluminium wire changed on beating. If they were beaten harder these COULD be changed into sheets. Silver foil is used for decorating sweets and Aluminium foil used for wrapping food. The property of metals by which they can be beaten into thin sheets is called malleability. This is a characteristic property of metals. As you must have noticed, materials like coal and pencil lead do not show this property.

EXPLANATION:

if the cloth is a LITTLE WET then you can dry it with a iron or if you have a washing machine then you can dry it by PUTTING wet clothes in the washing machine on spin mode .

ANSWER: Diffusion is faster in summer because TEMPERATURE is one of the main factors of diffusion . Increase in temperature will FASTEN the diffusion by breaking the FORCE of attraction between the molecules .

Explanation:

(a) tyndall effect

(B) brownian motion

(c) the PARTICLES of MATTER are constantly MOVING

Answer :-

Washing soda is PREPARED by using the sodium chloride as raw MATERIAL as following methods .

Step 1:-

the sodium chloride is dissolved in water to prepare the concentrated brine solution.

Step2:-

The carbon dioxide and Ammonia gas is dissolved in concentrated solution of brine to form Ammonium Chloride and sodium bicarbonate.

NaCl + H2O + CO2 + NH3 => NH4Cl + NaHCO3

Step3:-

The sodium bicarbonate is soluble at room temperature and it is easily SEPARATED from the solution.

Step4:-

The anhydrous Sodium Bicarbonate is heated and it get DECOMPOSED into washing soda carbon dioxide and water.

2NaHCO3 + ∆ => Na2CO3 + CO2 + H2O

Step5:-

The any HYDROUS sodium bicarbonate is attached with certain water molecules to form the hydrous washing soda.

Na2CO3 + 10.H2O => Na2CO3.10H2O

Explanation:

1 It is expensive and readily AVAILABLE

2 It is durable

3 They are high resistance to wear and tear

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it is a physical CHANGE because after beating EGG can not be convert in its ORIGINAL SHAPE..

JHARKHAND, rajisthan, NALIYA, Kerala, KOCHI, BIHAR

Characteristics of period table-->>

• The ARRANGEMENT of ELEMENTS in modern periodic table is based on their electronic configurations.

•The horizontal rows of elements in periodic table are called periods.

• There are 7 periods in modern periodic table.

•The elements in a period have consecutive ATOMIC numbers.

• The vertical columns in periodic table are called Group.

•The elements in a Group do not have consecutive atomic numbers.

•The METAL lie on left side of METALLOID and non metal lie on right side of metalloid.

•The nobel gase are placed on the extreme right side of the periodic table.

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ANSWER:

Explanation:

always leave it here is more HEAVIER than dry AIR because where there contain many WATER VAPOUR in which that's why

ANSWER:

i THINK your QUESTION is WRONG

ANSWER:

the spectrum of frequencies of electromagnetic RADIATION emitted or absorbed during transitions of electrons between energy LEVELS within an atom. Each element has a characteristic spectrum by which it can be recognized.

OR

When atoms are EXCITED they emit light of certain wavelengths which correspond to different colors. The emitted light can be observed as a series of colored lines with dark spaces in between; this series of colored lines is called a line or atomic SPECTRA. Each element produces a unique set of spectral lines.

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@dhruvchaudhary38

the SUBSTANCE which has pH value LESS than 7. for EXAMPLE , FORMIC and tartaric acid. also this turns the litmus paper into red.

ANSWER:

Hydrogen

Helium

Lithium

Beryllium

Boron

Carbon

Nitrogen

Oxygen

Fluorine

Neon

Sodium (NATRIUM)

Magnesium

Aluminium

Silicon

Phosphorus

Sulphur

Chlorine

Argon

Pottasium (KALIUM)

CALCIUM

EXPLANATION:

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The process in which a substance LOSES an electron in a chemical REACTION is called oxidation. ... The atoms that lost electrons are said to be oxidized. Atoms can be oxidized by nonmetals. REDUCTION is gain of electrons and thus gaining of NEGATIVE CHARGE. The atom that acquired electrons is said to be reduced.

ANSWER:

Are you from RPS school 7 TH class ?

EXPLANATION:

I am from RPS international class 7A1

when dil.H2SO4 is added in small amount of SODIUM carbonate then sodium sulphate , CO2 and water is PRODUCED

EXPLANATION:

Na2CO3 + H2SO4 - Na2SO4 + CO2 +H2O

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Answer:

A hematinic is a nutrient required for the FORMATION of blood cells in the PROCESS of ... can be ADMINISTERED as medicines, in order to increase the hemoglobin CONTENT of the blood

Answer:

No it will not increase or DECREASE the water LEVEL

This shows the property of solubility and the space between the PARTICAL of matter

The Valency of First 20 Elements

Element Symbol Atomic Number Valency

Hydrogen H 1 1

Helium He 2 0

Lithium Li 3 1

Beryllium Be 4 2

Boron B 5 3

Carbon C 6 4

Nitrogen N 7 3

Oxygen O 8 2

Fluorine F 9 1

Neon Ne 10 0

Sodium NA 11 1

Magnesium Mg 12 2

Aluminum Al 13 3

Silicon Si 14 4

Phosphorus P 15 3

Sulphur S 16 2

Chlorine Cl 17 1

Argon Ar 18 0

Potassium K 19 1

Calcium Ca 20

ANSWER:

EXPLANATION: The answer is GIVEN below in the PHOTO

Explanation:

WATER freeze at 0 DEGREE CELCIUS and BOILS at 100 degree celcius

FORMULA of AMMONIUM CARBONATE is..

(NH4)2CO3

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Answer:

Bcoz plastic bags didn't decompose easily. If they are burnt then they causes a LOT of pollution which is very harmful to human LIFE as WELL as other living ORGANISMS on this Land. That's true that they can be recycled but we shouldnt USE them as they are harmful to our health.

ANSWER:

the water falling from a great height EXERT a great PRESSURE which may break the BASE below. So... it is made broad to make it strong.