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EXPLANATION:

ZINC in znso4 =22.6%

43.9% water

it means in 100g of zinc sulphate there is 22.6g zinc

in 13.7 g 13.7×22.6/100

3.0962 g

water 13.7×43.9/100

6.0143 g

law of CONSTANT proportion states that there would be a fixed AMOUNT of an element in a compound

Answer:

CuSO4 + FE --->FeSO4 + CU

this is a displacement reaction

ZnSO4 + 2HCL ---> ZnCl2 +H2SO4

this is DOUBLE displacement reaction

Explanation:

Increasing pressure usually increases the boiling point of a LIQUID. A way to THINK about it is that the MOLECULES of the liquid NEED more energy to break into the gas phase when the more molecules are hitting the surface of the liquid with more energy. For melting point, increasing the pressure makes some difference.

Answer:

your answer is here

Explanation:

A pi bond occurs when two sets of ELECTRON orbitals, INVOLVED in the bond, overlap. A common example occurs in BENZENE. Delocalization is the phenomena by which electrons or BONDS are transient in nature.

Answer:

though lithium has the HIGHEST ionization energy, yet lithium is strongest REDUCING agent among alkali metals, because of its largest heat of HYDRATION which sufficiently exceeds the ionization energy.

Explanation:

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ANSWER:

-273°C = -273+273.15 =

0.15 K

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ANSWER:

Resource conservation is management of the use of NATURAL resources to provide the maximum benefit to current generation while maintaining CAPACITY to meet the NEEDS of future generations. Conservation INCLUDES both the protection and rational use of natural resources.

ANSWER:

During the absence of OXYGEN, in anaerobic respiration, the by - products are carbon DIOXIDE and ethyl ALCOHOL. So, the odd ONE out is 'Starch'.

Answer:

n-heptane has NINE isomers all with DIFFERENT names and arrangement but STILL containing seven carbon atom and sixteen HYDROGEN atom

Answer:

TAKE a container fill it with water

add salt to it and LET it rest

after some you will see that salt has broken into amll PARTICLES and dissolved in the water

this shows that particles of MATTER are very small

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COVALENT bonds

TWO covalent bonds form between the two OXYGEN ATOMS because oxygen requires two shared electrons to fill its outermost shell.

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VALENCY of y is 3.

there are 1 COVALENT BOND.

. .

Answer:

The ATOMIC mass is the mass of an atom. Although the SI unit of mass is KILOGRAM, the atomic mass is often expressed in the non-SI unit dalton where 1 dalton is DEFINED as ¹⁄₁₂ of the mass of a single carbon-12 atom, at rest.

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ANSWER:

The answer is.... All of these.

Answer:

The various WAYS in which a chemical equation can be made more informative are : (i) By indicating the PHYSICAL STATES of the reactants and products. Example: Gaseous state is indicated by the symbol (G). (ii) By indicating the heat changes taking PLACE in the reaction.

ANSWER:

MAY be downdard DISPLACEMENT I THINK

ANSWER:

d)FIRST INCREASES then decreases

Explanation:

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Answer:

you can prepare directly isopropyl chloride directly is the HYDROCHLORIC acid when you use a cool mixture of concentrated HCL ZINC chloride and ISO profile alcohol of 30 GRAM you can GET the isopropyl chloride during the process isopropyl chloride GETS distilled and will be available inside the condenser

a PROCESS that involves rearrangement of the molecular or IONIC structure of a SUBSTANCE, as distinct from a CHANGE in physical form or a nuclear REACTION.

Explanation:

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ANSWER:

these are answer for your QUESTIONS

Zn+2Ag(NO)3----->Zn(NO3)2+2Ag

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ANSWER:

• valency is the combining capacity of the atom of an element it is EQUAL to the number of electrons and atoms can not or accept or SHARE
• chemical formula of a compound is a symbol representation of its COMPOSITION

ANSWER:

SEE the attachment below

Explanation:

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The FOLLOWING are the advantages of Modern PERIODIC table. 2. The position of the ELEMENTS in the periodic table makes it easy to predict and COMPARE their properties, and explains the reason for their specific position in the periodic table.

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ANSWER:

The electron affinity of an atom or molecule is defined as the amount of ENERGY released when an electron is ATTACHED to a neutral atom or molecule in the GASEOUS state to form a negative ion.

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Answer:

The process of DIFFUSION SPREADS the SMELL of PERFUME in the ROOM

ANSWER:

A COVALENT bond is formed if ELECTRONEGATIVE difference between TWO ATOMS is less than 1.7

ANSWER:

The energy required to take out or ADDS up an electron in a neutral ATOM is KNOWN as IONISATION energy.

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Answer:

ionic COMPOUNDS have strong electrostatic FORCE of attraction but the COVALENT compounds do not have strong intermolecular forces .So they require less heat to BREAK the force and have LOW melting point

Answer:

Explanation:

n a displacement reaction, a more REACTIVE element REPLACES a less reactive element from a compound. In a double displacement reaction, two atoms or a group of atoms CHANGE places to FORM new COMPOUNDS

ANSWER:

HYDROGEN......is the answer.... MARK as BRAINIEST

ANSWER:

According to the my thinking, the chemical compound CONTAIN H, X and Y. Here, H means Hydrogen, X refers to N which means Nitrogen and Y refers to O which means Oxygen. As we know that, Nitric acid contain these chemical elements are Hydrogen, Nitrogen and Oxygen. In Nitric acid, one mole of Hydrogen. One mole of Nitrogen and three moles of Oxygen.

What is the valency of Y ?

=> The valency of Y is (-2).

What is the COVALENCY of Y ?

=> The covalency of Y is O=O.

How many COVALENT bonds are there in the molecule ?

=> There are total of 5 covalent bonds.

Suggest a name for elements X and Y.

=> X → Nitrogen and Y → Oxygen

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Naphthalene Balls

Naphthalene balls disappear at with TIME without leaving any solid because it GOES through the process called sublimation. It's MELTING point is same as that of the point required it to change into GASEOUS state.

Answer:

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Answer:

3) MOLECULAR formula

Explanation:

ATOMIC increases as we go down the grp and DECREASES as we go from LEFT to right in a period

F

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ANSWER:

I THINK MCL2 because ELEMENT is DIVALENT

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Temperature and pressure are the two factors which are responsible for CHANGE in STATE of MATTER.

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Answer:

The length of the bond is determined by the NUMBER of bonded electrons (the bond order). The HIGHER the bond order, the stronger the pull between the two atoms and the shorter the bond length. GENERALLY, the length of the bond between two atoms is approximately the sum of the covalent radii of the two atoms.

Explanation:

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Answer:

Option D -0.177 V,

Explanation:

⇒pH=3,

⇒[H3O^+]=10^-pH=10^-3M,

⇒E el=E el^0-0.059/n LOG PH2/[H^+]^2,

⇒E el=0-0.059/n log 1/(10^-3)^2,

⇒E el=-0.177 V.

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Answer:

Explanation:

EXOTHERMIC REACTION relaeses heat which MAKES the solution and the beaker hot

ANSWER:

by the LAW of CONSERVATION of MASS....

Answer:

ACCORDING to the formula MgAl2O4, if there are 4 OXIDE ions, there will be 1Mg2+ ion and 2Al3+ ions. But if the 4O2− ions are in ccp arrangement, there will be 4 octahedral voids and 8 tetrahedral voids. Thus, 1Mg2+ ions is PRESENT in one of 8 tetrahedral voids

∴ % of tetrahedral voids occupied by Mg2+=18×100=12.5%

Similarly, 2Al3+ ions are present in two octahedral voids out of 4 available

∴ % of octahedral voids occupied by Al3+=24×100=50%

Explanation:

ANSWER:

painkillers

Explanation:

Opioids are a class of drugs naturally found in the opium poppy plant and that work in the BRAIN to produce a variety of effects, INCLUDING the relief of PAIN with MANY of these drugs. Opioids can be prescription medications often referred to as painkillers, or they can be so-called street drugs, such as heroin.

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Answer:

In a chemical reaction, one or more substances are transformed to new substances. A chemicalreaction is DESCRIBED by a chemical equation, an EXPRESSION that gives the identities and QUANTITIES of the substances INVOLVED in areaction.

ANSWER:

COVALENT BOND of TWO bonds

Explanation:

thermal decomposition: CaCO3 heat = CaO +CO2.

2) electrolytic decomposition: 2h2o electrolysis = 2H2 + 02.

= 3) photo decomposition: AGCL sunlight = AG +C12.

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which ALKALI?

here are the STRONGEST alkalis

NaOH

KOH

RbOH

CsOH

Ca(OH)2

Sr(OH)2

Ba(OH)2

ANSWER:

The development of new drugs involves chemical analysis and synthesis of new compound. The chemistry of the DISEASE must be studied, as well as how the drugs affect the human body . A drug MAY WORK well in animals but not in humans.