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Answer:

The modern periodic table has been divided into

(a) SEVEN periods: THREE short and four long

(B) nine periods : six short and three long

(C) EIGHTEEN periods : ten short and eight long

(d) nine periods from zero to VIII

EXPLANATION:

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ANSWER:

thiophene

Explanation:

it is not a carbocylic COMPONENTS

Isotope definition

Isotope, one of two or more SPECIES of atoms of a chemical ELEMENT with the same atomic number and position in the periodic table and nearly identical chemical behaviour but with different atomic masses and physical PROPERTIES. Every chemical element has one or more isotopes. Isotope. key people.

Isotope Examples

Carbon 12 and Carbon 14 are both isotopes of carbon, one with 6 neutrons and one with 8 neutrons (both with 6 protons). Carbon-12 is a stable isotope, while carbon-14 is a radioactive isotope (radioisotope). Uranium-235 and uranium-238 occur naturally in the Earth's crust. Both have LONG half-lives.

Answer:

This is because when crude oil is extracted from the LAND it is black in color. This resource is compared to gold DUE to its VALUABLE properties and WORTH too. Crude oil is jet black before PURIFICATION but after purification, it turns golden in color; therefore, it's tagged as Gold.

Answer:

The WAVELENGTH of the FIRST member of the Balmer SERIES of HYDROGEN is 6563 × 10−10m. Calculate the wavelength of its second member.

Answer:

The TRUE solution is the homogenous mixture, while Colloidal solution and SUSPENSION are the HETEROGENEOUS mixtures of two or more substances. Another DIFFERENCE between these THREE types of solution is that the True solution is transparent, while the Colloidal solution is translucent and Suspension is opaque.Feb 18, 2019

ANSWER:

Reversible reactions never go to completion because they attain equilibrium after a certain time. So, the CONCENTRATION of reactants and PRODUCTS is stable, it neither INCREASES nor decreases.

EMPIRICAL FORMULAS SHOW the simplest whole-number ratio of atoms in a COMPOUND, molecular formulas show the number of each type of atom in a molecule, and STRUCTURAL formulas show how the atoms in a molecule are bonded to each other.

Answer:

That is ,very colliison between molecuels LEADS to the chemical REACTIONS. This is not true. THUS, Ea cannot be ZERO.

PERIODIC classification of elements is the METHOD by which elements are grouped on the basis of their CHARACTERISTICS i.e. we KEEP the elements that are alike in one group and the REST of the elements in the other group.

Answer:

no the activation energy of a REACTION can't be zero or negative.

Explanation:

every reaction requires some activation energy to start the reaction. if e=0 then arrehnious EQUATION cant be TRUE.

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THIS REACTION IS :

A) SUBSTITUTION REACTION

When a mixture of methane and chlorine is EXPOSED to ultraviolet light - TYPICALLY sunlight - a substitution reaction occurs and the organic product is CHLOROMETHANE.

However, the reaction doesn't stop there, and all the hydrogens in the methane can in turn be replaced by chlorine atoms. That MEANS that you could GET any of chloromethane, dichloromethane, trichloromethane or tetrachloromethane.

Explanation:

MASS of ONE atom is known as ATOMIC mass.

The GIVEN mass is itself atomic mass, but in grams.

For answer in atomic mass unit (amu) just divide the given atomic mass in grams by

Explanation:

actinomycetes, fungi, algae, protozoa, and a wide variety of larger SOIL fauna, INCLUDING springtails, mites, nematodes, EARTHWORMS, ANTS, insects that spend all or part of their life underground, and larger ORGANISMS such as burrowing

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ᴀ ғᴜsᴇ ᴏʀ ᴄɪʀᴄᴜɪᴛ ʙʀᴇᴀᴋᴇʀ ᴘʀᴇᴠᴇɴᴛs ᴛʜɪs ʙʏ ''ʙʟᴏᴡɪɴɢ,'' ᴏʀ ʙʀᴇᴀᴋɪɴɢ ᴛʜᴇ ᴄɪʀᴄᴜɪᴛ, ᴡʜᴇɴ ᴀɴ ᴏᴠᴇʀʟᴏᴀᴅ ᴏᴄᴄᴜʀs. ғᴜsᴇs sᴄʀᴇᴡ ɪɴᴛᴏ ᴛʜʀᴇᴀᴅᴇᴅ sᴏᴄᴋᴇᴛs ɪɴsɪᴅᴇ ᴛʜᴇ ғᴜsᴇ ʙᴏx. ᴛʜᴇ ғᴜsᴇs ᴄᴏɴᴛᴀɪɴ ᴀ ᴛʜɪɴ sᴛʀɪᴘ ᴏғ ᴍᴇᴛᴀʟ ᴛʜᴀᴛ ᴍᴇʟᴛs ɪғ ᴛʜᴇ ᴄᴜʀʀᴇɴᴛ (ᴏʀ ᴀᴍᴘᴇʀᴀɢᴇ) ғʟᴏᴡɪɴɢ ᴛʜʀᴏᴜɢʜ ᴛʜᴀᴛ ᴄɪʀᴄᴜɪᴛ ᴇxᴄᴇᴇᴅs ᴛʜᴇ ᴀᴍᴏᴜɴᴛ ғᴏʀ ᴡʜɪᴄʜ ᴛʜᴀᴛ ғᴜsᴇ ɪs ʀᴀᴛᴇᴅ.

Hope it HELPS ☺️

ANSWER:

Sorry, L didn't get your QUESTION.

Explanation:

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Answer:

Mercury(II) BROMIDE or MERCURIC bromide is the chemical compound composed of mercury and bromine with the formula HgBr₂. This white crystalline solid is a laboratory reagent. LIKE mercury(II) chloride, it is extremely toxic.

Answer:

K=Molarity in ORGANIC phase Molarity in aqueous phase ... The partition COEFFICIENTS REFLECT the SOLUBILITY of a ... INSTEAD, fresh diethyl ether is added to the aqueous layer,

ANSWER:

QUESTION is RONG sister

Explanation:

OK NA

Answer:

EWG

Carboxylic Acids are more acidic than phenols

Decreasing order of ACIDITY is

c>E>a>b>d

Answer:

Potassium CHLORATE is an INORGANIC compound with chemical formula KClO3. It is ALSO known as Fekabit or Kaliumchlorat. It is very flammable when mixed with combustible materials. It is a compound containing potassium, oxygen, and CHLORINE. It appears as a white crystalline substance in its pure form.

Explanation:

This happens as follows: The soil in the FARMLAND contains some WATER. On a HOT SUMMER day, this water of soil evaporates to form water vapour. The water vapour COMING out of the soil reflects the sunlight irregularly due to which the air above the soil seems to shimmer.

Answer:

☆In Mendeleev's PERIODIC table the elements are arranged in the INCREASING order of atomic MASSES. On the other hand, in the modern periodic table the elements are arranged in the increasing order of atomic numbers which is more fundamental PROPERTY than atomic MASS.

Answer:

this is a short trick

EXPLANATION:

CH3COCH3 is acetone ...and write 2 ATOMS of acetone thus and extract H2O from there(2atoms of H and O)

N.B.- those 2 H are Alpha_ hydrogen

Answer:

MANTLE :-

• The lithosphere is the solid, outer part of the EARTH, extending to a depth of about 100 kilometers (62 miles). The lithosphere INCLUDES both the crust and the brittle upper portion of the mantle. The lithosphere is both the coolest and the most rigid of Earth's layer.

UPPER MANTLE :-

• The upper mantle of Earth is a very thick layer of rock inside the planet, which begins just beneath the crust and ends at the top of the lower mantle at 670 km. TEMPERATURES range from approximately 200 °C at the upper boundary with the crust to approximately 900 °C at the boundary with the lower mantle.

LOWER MANTLE :-

• The lower mantle is the liquid inner layer of the earth from 400 to 1,800 miles below the surface. The lower mantle has temperatures over 7,000 degrees Fahrenheit and pressures up to 1.3 million times that of the surface near the outer core

⚕️ NONEXISTENT⚕️

The electronic configuration of an atom RELATES to its position in the modern periodic table as when we arrange the electrons in the 1st , 2ND , 3rd and 4th shells i.e. ... So, its' electronic configuration is 2,8,1 and its VALENCY is +1 . This element THEREFORE comes in GROUP 1 with +1 valency.

To know its position in periodic table first we should know the electronic configuration of the element. Valence electrons: The electrons, which are present in the outermost shell of an atom are called valence electrons. ... For any element the valence shell number is equal to its period number.

ANSWER:

ʟᴏʟᴛʜᴇ ᴄʜᴇᴍɪᴄᴀʟ ʀᴇᴀᴛɪᴏɴ ᴡɪʟʟ ʜᴀᴘᴘᴇɴɴ

_▀▄▀▄▀▄▀▄▀▄▀▄▀▄▀▄▀▄▀▄▀▄▀▄▇ ▆ ▅ ▄ ▂ ▁▁ ▂ ▄ ▅ ▆ ▇▇ ▆ ▅ ▄ ▂ ▁▁ ▂ ▄ ▅ ▆ ▇▇ ▆ ▅ ▄ ▂ ▁▁ ▂ ▄ ▅ ▆ ▇▇ ▆ ▅ ▄ ▂ ▁▁ ▂ ▄ ▅ ▆ ▇▇ ▆ ▅ ▄ ▂ ▁

THEREFORE MOLES of CH4 required to PRODUCE 22g of CO2 are: =441×22=0. 5 mol.

HOPE THIS HELPS YOU DEAR...

EXPLANATION:

(100-x)% is CORRECT ACCORDING to the QUESTION

EXPLANATION:

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ANSWER:

A)

EXPLANATION:

EXPLANATION:

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Explanation:

Combustion of METHANE :

CH4+2O2⟶CO2+2H2O

Given WEIGHT of methane =16G

Molecular weight of methane =16g

No. of moles of methane in 16g of it =mol. wt.given wt.=1616=1 mole

From the reaction,

AMOUNT of water produced by the combustion of 1 mole of methane = 2 moles

weight of 1 mole of water =18g

⇒ weight of 2 moles of water =2×18=36g

Since, the given weight of methane is 16 g, hence the water produced by the combustion of 16 g of methane is 36 g.

ANSWER:

The starting material for sulfuric acid manufacture is clean, dry SULFUR dioxide (SO2) gas. ... In the contact process SO2 is oxidized to sulfur TRIOXIDE (SO3) at high TEMPERATURE (about 450°C) in the presence of a vanadium catalyst. SO3 then is DISSOLVED in concentrated sulfuric acid forming fuming sulfuric acid (oleum).

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the minimum extra ENERGY required by REACTANT molecules such that THRESHOLD energy is REACHED . is activation energy

ANSWER:

Double SALTS exist in solid state but dissociate into constituent IONS on DISSOLUTION in water. They lose their identity in aqueous solution. Mohr's salt FeSO

4

⋅(NH

4

)

2

SO

4

⋅6H

2

O is a double salt. The aqueous solution of this salt gives the test of FE

2+

, NH

4

+

and SO

4

2−

ions.

ANSWER:

Haloalkanes and HALOARENES are the hydrocarbons in which one or more hydrogen atoms have been replaced with halogen atoms. The primary DIFFERENCE between haloalkanes and haloarenes is that haloalkanes are derived from open-chain hydrocarbons (alkanes) WHEREAS haloarenes are derived from aromatic hydrocarbons.

ANSWER:

sorry

Explanation:

i don't KNOW this LANGUAGE

ANSWER:

YES it is BIGGER than that

EXPLANATION:

your answer

Explanation:

BROMINATION of acetanilide GIVES para brominated acetanilide mainly, because amino group of acetanilide is protected by acetyl group. Reaction: MECHANISM: Bromination is an electrophilic SUBSTITUTION reaction on an aromatic ring.

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ANSWER:

As the kinetic energy of the gaseous solute increases, its molecules have a greater tendency to ESCAPE the attraction of the solvent molecules and return to the gas phase. Therefore, the solubility of a gas DECREASES as the TEMPERATURE increases.

Explanation:

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ANSWER:

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ANSWER:

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Explanation:

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ANSWER:

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ANSWER:

SORRY but i don't KNOW the answer for this QUESTION

EXPLANATION:

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