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ong>Answer:

Explanation:

Answer:

Answer:

Answer:

Answer:

Width of rectangle is 25 cm.

Step-by-step explanation:

GIVEN :-

A wire bend in form of square of side 30 cm.

Then wire is again bend in form of rectangle of LENGTH 35 cm.

To find :-

Width of the rectangle.

Solution :-

Here, Concept is : If we are bending wire in form of square than again bending it in rectangle. Than, perimeter of square will equal to perimeter of rectangle because we are not INCREASING length of wire by one measure we are bending it in square and rectangular shape.

So,

Perimeter of square = 4 × side

⟶ Perimeter = 4 × 30

⟶ Perimeter = 120

Thus,

Perimeter of square is 120 cm.

According to concept, Perimeter of square and perimeter of rectangle are equal.

So, Perimeter of rectangle is 120 cm.

Let, Breadth or width or rectangle be x cm.

We know,

Perimeter of rectangle = 2(Length + Breadth)

⟶ 120 = 2×(35 + x)

⟶ 120 = 70 + 2x

\⟶ 120 - 70 = 2x

⟶ 50 = 2x

⟶ 50/2 = x

⟶ x = 25

We TAKE, Width of rectangle be x.

Therefore,

Width of rectangle is 25 cm.

ong>Explanation:

TRIPLE bond, in chemistry, a covalent linkage in which two atoms SHARE three PAIRS of electrons, as in the nitrogen molecule, N2, or acetylene, C2H2.

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ong>ANSWER:

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ong>ANSWER:

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hemistry, a salt is a chemical compound consisting of an ionic assembly of cations and anions.[1] SALTS are composed of related numbers of cations (POSITIVELY charged ions) and anions (negatively charged ions) so that the product is electrically neutral (without a net charge). These component ions can be inorganic, such as chloride (Cl−), or ORGANIC, such as acetate (CH

3CO−

2); and can be monatomic, such as fluoride (F−) or POLYATOMIC, such as sulfate (SO2−

4).

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ǫᴜᴇsᴛɪᴏɴ :-

Examples of sodium salt , Chloride salt and Magnesium salt .

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ᴀɴsᴡᴇʀ :-

Exᴀᴍᴘʟᴇs Oғ Sᴏᴅɪᴜᴍ Sᴀʟᴛ :-

• Examples of important inorganic sodium salts are sodium FLUORIDE, sodium chloride, sodium bromide, sodium iodide, sodium sulfate, sodium bicarbonate and sodium CARBONATE. Sodium amide (NaNH2) is the sodium salt of ammonia (NH3).

Exᴀᴍᴘʟᴇs ᴏғ ᴄʜʟᴏʀɪᴅᴇ sᴀʟᴛ :-

• Chloride salts include sodium chloride, POTASSIUM chloride, calcium chloride and ammonium chloride. Most chloride salts are readily SOLUBLE in water, but mercurous chloride (calomel) and silver chloride are insoluble, and lead chloride is only slightly soluble.

Exᴀᴍᴘʟᴇ ᴏғ ᴍᴀɢɴᴇsɪᴜᴍ sᴀʟᴛ :-

• Magnesium chloride is the name for the chemical compound with the formula MgCl2 and its various hydrates MgCl2(H2O)x. Anhydrous MgCl2 contains 25.5% elemental magnesium by mass. These salts are typical ionic halides, being highly soluble in water.

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ong>ANSWER:

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Explanation:

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ong>OK.

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ong>Molecular Mass is the mass of the elements present in a compound .

The H2O is water.

Two hydrogen & one CARBON compound.

H2O = 2 × Hydrogen + Oxygen

• Hydrogen atomic mass = 1

• Oxygen atomic mass = 8 × 2 = 16

➝ H2O = 2 × 1 + 16

➝ 2 + 16

➝ 18 amu

H2O is devided in RATIO of 2 : 1.

The H2O is water a UNIVERSAL solvent .

Hydrogen is the first element of PERIODIC table .

Oxygen is 8th element of periodic table.

H - O - H

= H2O

ong>ANSWER:

Actinoid contraction refers to the GRADUAL DECREASE in the IONIC radii with increase in atomic number of ACTINOIDS. ... In the actinoid series, the nuclear charge and number of 5felectrons increases by one unit.

Optical Properties of Colloids

When a beam of light is passed through a colloidal solution kept in dark, the path of the beam gets illuminated with BLUE colour.

This phenomenon is KNOWN as the Tyndall effect and the path is known as the Tyndall cone.

ong>Answer:

तात्पर्य है?

What do you mean by secularism?

What do you mean by puble facile

3

(E) नीचे दी गई तस्वीर क्या अंकित करती है।

What indicates the below given picture?

What indicates the below pico

(0. शिक्षा के अधिकार से आपका क्या अभिप्राय है।

{}) দামী বুরহা নই জাজ্ঞা জমা জালিচায় ?

What do you mean by TILAL earres?

What do you mean by RIGHT to education?

7.

ong>Explanation:

a.)Sulphuric acid is a strong acid and it gets completely ionized in aqueous solution. - Sulphuric acid on reaction with a base gives both acidic salts and normal salts.

while HCl being a monobasic acid is left with no hydrogen ions.

b.)In an acetic acid solution, there is a LARGE NUMBER of undissociated CH3COOH molecules, and just a few H+ and CH3COO- ions. HENCE, dilute HCl acid is stronger than highly concentrated acetic acid.

ong>Explanation:

iron is BEST CONDUCTOR of heat

wood is best conductor of heat

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ong>Explanation:

in this reaction MAGNESIUM DISPLACE copper from COPPERSULPHATE SOLUTION

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s BR2 = 0.245 G/ 159.808 g/mol=0.00153

[Br2]= 0.00153 / 0.190 L=0.00807 M

1.04 X 10^-3 = [BR]^2/ [Br2] = [Br]^2 / 0.00807

[Br]= 8.93 x 10^-6 M

moles Br = 8.93 x 10^-6 x 0.190=1.59 x 10^-6

mass Br = 1.59 x 10^-6 x 79.904 g/mol=0.000127 g

ong>Answer:

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• A SOLUTION has 50 gram of SALT in 320G of water.

• The mass percent of the salt in the solution.

☀ The percent mass of component in a solution is known as the mass percentage of the solution .

Mass % of a component =

× 100

We have,

Salt as a solute = 50 gram

Water as a solvent = 320 gram

The salt water solution = ( 50 + 320 )

= 370 grams

Mass % of a component = × 100

➝ 0.135136 × 100

➝ 0.136 × 100

➝ × 100

➝

➝ 13.6 %

______________________________________

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ong>Answer:

Answer. The STATE of MOTION of an OBJECT is described by its speed and the direction of motion. For a BODY having zero speed, the state of motion is rest. ... For a body having VARIABLE speed and (or) direction, the state of motion is non-uniform motion.

Explanation:

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Explanation:

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Atomic Mass Unit:-

Explanation:

The DALTON or unified atomic mass unit is a unit of mass widely used in physics and chemistry. It is defined as 1/12 of the mass of an unbound NEUTRAL atom of carbon-12 in its nuclear and electronic ground state and at rest. The atomic mass constant, denoted mᵤ is defined identically, giving mᵤ = m/12 = 1 Da.

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substance which is RELATIVELY LESS in quantity in a SOLUTION is called concentrated.

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A=H2

marble...

ong>EXPLANATION:

please FIND the attached IMAGES for the ANSWER to your QUESTION.

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ong>Answer:

Explanation:

the PRODUCTS obtained in chlor - alkali process are sodium hydroxide, chlorine gas, and hydrogen gas.

2NaCl. + 2H2O -->2NaOH + CL2 + H2

# the gas liberated at anode is chlorine and gas liberated at cathode is hydrogen.

# the RAW material used is concentrated solution of sodium chloride also KNOWN as brine

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1 faraday is equal to 96485.34 COULOMBS

FORMIC ACID and sulphuric acid is the answer of this question

ong>Explanation:

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the answer is d)

EXPLANATION:

DIFFERENT no.of neutrons

The Pauli EXCLUSION principle is the quantum mechanical principle which states that two or more identical fermions cannot occupy the same quantum STATE within a quantum SYSTEM simultaneously.

ong>Answer:

Solution : 

(a) NITROGEN is one of the CONSTITUENTS of air. It can be separated with the help of fractional distillation.

(b) Chromatography helps in separating dye from blue ink.

(c ) Centrifugation or churning helps in separating CREAM from milk.

(d) AMMONIUM chloride is of volatile nature while common SALT (sodium chloride) is not. The separation can be done with the help of sublimation.

Hᴇʀᴇ ɪs ᴜʀ Aɴsᴡᴇʀ

ǫᴜᴇsᴛɪᴏɴ :-

☆ Define atomic mass unit.

☆ What is the numerical value of mole.

☆ Name the elements present in oxide ion

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ᴀɴsᴡᴇʀ :-

1 . ☆ A unit of mass used to express atomic and molecular weights, equal to one twelfth of the mass of an atom of carbon-12.

☆ An atomic mass unit is defined as a mass equal to one twelfth the mass of an atom of carbon-12. The mass of any ISOTOPE of any element is EXPRESSED in relation to the carbon-12 standard. For example, one atom of helium-4 has a mass of 4.0026 amu.

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2 .☆ One mole contains exactly 6.022 140 76 x 1023 elementary entities. This NUMBER is the fixed numerical value of the Avogadro constant, NA, when expressed in the unit mol–1 and is called the Avogadro number.

----------------------------------------------

3 .☆ An oxide (/ˈɒksaɪd/) is a chemical compound that contains at least one oxygen atom and one other element in its chemical formula. "Oxide" itself is the dianion of oxygen, an O2– (molecular) ion. METAL oxides thus typically contain an anion of oxygen in the oxidation state of −2.

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BᴇʀʀʏCʀᴜsʜ ❤︎

H and D have same no. Of NEUTRONS

ong>ANSWER:

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4. ATOMIC SIZE of a is LARGEST of them all

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icle 22 SAYS that "No PERSON who is arrested shall be detained in custody without being informed, as soon as MAY be, of the grounds for such arrest nor shall he be denied the right to consult, and to be defended by, a LEGAL practitioner of his choice."

(A) H and D have same number of Protons.

Explanation:

Isotopes:

ISOTOPES have different mass number and same ATOMIC number that this number of protons.

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Explanation:

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ong>Answer:

(ʘᴗʘ✿)<(￣︶￣)>

Explanation:

Hint: In order to write condensed orbital notation of electronic configuration of the given elements, we must know how the ELECTRONS are filled in the atomic orbitals and how the subshells are ARRANGED. The electrons are arranged in the subshell ACCORDING to Aufbau's PRINCIPLE

ii) ATOMIC NUMBER:

The atomic number or proton number of a chemical element is the number of protons found in the nucleus of every atom of that element. The atomic number uniquely identifies a chemical element. It is identical to the charge number of the nucleus.

iii) 18

electrons can be accomodated in n=3 shell in Boh r model of atom

Explanation:

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