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Answer:

MAY U PLZZ send the complete question

Explanation:

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Answer:

Aim: ACTIVITY to SHOW that particles of matter attract each other

OBJECTS required: A coin, Chalk and a rubber band.

Procedure:

1. Take all the above objects and try HAMMERING them, stretching or breaking them.

You will OBSERVED that you find it easy to break a chalk, little tougher to break rubber band and toughest to break a coin.

Conclusion: Particles of matter attract each other.

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Explanation:

Answer:

The % of Al in the Alloy is 54.91%

The % of Mg in the Alloy is 45.09%

Explanation:

Given - "One gram of an alloy of aluminium and magnesium when heated with excess of dil. HCl forms magnesium chloride, aluminium chloride and hydrogen."

So let`s write equations as per given equations;

Al + HCl     ⇄   ALCL3 + H2

Let`s balance the equation;

2Al + 6HCl     ⇄     2AlCl3 +   3H2

From the equation - 2 mole of Al produces 3 mole of H2

⇒ 2* 27 gm of Al produces 3 moles of H2

At STP 1 mole H2 gas is equal to 22.4 litres of gas

⇒ 54 gm of Al produces 3*22.4 litres of H2 gas at STP......EQ 1

Let`s calculate for Mg

Mg(s) + 2HCl (dil.)    ⇄   MgCl2(s)    + H2

1 mole of Mg produces 1 mole of H2 gas

24 gm of Mg produces 22.4 litres of H2 gas at STP......Eq. 2

First we need to calculate volume of H2 gas at STP, ⇒ at 273 K and 1 bar

Given "The evolved hydrogen collected over mercury at 0 C has a volume of 1.2 litres at 0.92 at pressure."

From ideal gas equations - P1V1/T1  =  P2V2/T2......Eq. 3

V1 = 1.2 litres P1 = 0.92 bar and T1 = 0+273 = 273 K

V2 = ? P2 = 1 bar and T2 = 273 K

By PUTTING above values in eq. 3,

(0.92)*(1.2)/273    =     V2*(1)/273

⇒ V2 = 1.104 litres

Let`s consider the amount of Al in alloy is x gm

So, the amount of Mg in Alloy will be 1-x gm (∵ Alloy is 1 gm, given)

From Eq. 1, ∵ 54 gm Al produces 3*22.4 litres of H2 gas

∴ x gm of Al will produce 3*22.4*x/54 litres of H2 gas = 1.24x.....Eq. 4

From Eq. 2 ∵ 24 gm Mg produces 22.4 litres of H2 gas

∴ 1-x gm of Mg will produce 22.4*(1-x)/24 litres of H2 gas = 0.93(1-x) ....Eq. 5

From Eq. 4 & 5, total volume of H2 gas = 1.24x + 0.93(1-x) = 0.93 + 0.31x ....Eq. 6

The volume of H2 from Eq. 6 should be equal to evolved H2 gas at STP (V2)

⇒ 0.93   + 0.31x   =   1.104

⇒   x  = 0.5491

and 1-x would be 0.4509

% of Al = x*100/1  = 54.91

% of Mg = (1-x)*100/1 = 45.09

SORRY I can't because I don't USE......

Explanation:

TWO HOURS, one-sixteenth of the starting amount of a CERTAIN radioactive ISOTOPE REMAINED undecayed. The half life of the isotope

Answer:

The process of joining SMALL MOLECULES to form a large molecule is known as polymerization. The building blocks of polymers are monomers. Based on the CHEMICAL reaction involved, polymerisation is divided into two groups known as addition polymerization and condensation polymerization. Addition polymerization is the process of repeated addition of monomers that posses double or triple bonds to formpolymers. A condensation polymerization is a process that involves repeated condensation reactions between two different bi-functional or tri-functional monomers. Give below in a tabular column is the difference between addition and condensation polymerization.

Addition PolymerizationCondensation PolymerizationMonomers must have either a double bond or triple bondMonomers must have two similar or different functional groupsProduces no by-productsBy-products such as AMMONIA, water and HCl are producedAddition of monomers results in polymersCondensation of monomers result in polymersThe molecular weight of the resultant polymers is a multiple of monomer’s molecular weightThe molecular weight of the resultant polymer is not a multiple of monomer’s molecular weightLewis acids or bases, radical initiators are catalysts in addition polymerizationThe catalysts in condensation polymerization are catalysts in condensation polymerization.Common examples of addition polymerization are PVC, polyethene, TEFLON etc.Common examples of condensation polymerization are nylon, bakelite, silicon, etc.

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amalgam of Hg in NA

and glass iss ALSO an BEST example

ANSWER:

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EXPLANATION:

I have explain it in PHOTO.

YOUR ANSWER :-

—Latent heat is the name given to heat energy required to change the physical state of a substance without changing the temperature of the system ...


There are TWO types of latent heat namely :-

1)Latent heat of Vaporization

—Latent heat of Vaporization is the heat energy required to change 1 kg of liquid into GAS at atmospheric pressure at its boiling POINT ....

2) Latent heat of Fusion

— Latent heat of Fusion is the heat energy required to change 1 kg of solid into liquid at atmospheric pressure at its melting point ..

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Sodium NITRATE is a colorless, odorless, crystalline compound, SOMETIMES REFERRED to as soda niter, nitrate of soda or Chile SALTPETER.

It is USED for making potassium nitrate, fertilizers, explosives, in the production of high-strength glass, some limited pharmaceuticals and to preserve meats.

ANSWER:

add SALT in water and measure it's VOLUME before adding salt and after adding salt

Explanation:

by this we can conclude

Answer:

I hope this will help you

Explanation:

Artwork illustration showing how a Torricellian barometer works.

Photo: A Torricellian barometer (sometimes called a mercury barometer) is an inverted (upside-down) glass tube standing in a bath of mercury. Air pressure pushes down on the surface of the mercury, making some RISE up the tube. The greater the air pressure, the higher the mercury rises. You can read the pressure off a scale marked onto the glass.

The simplest kind of barometer is a tall closed tube standing upside down in a bath of mercury (a dense LIQUID METAL at room temperature) so the liquid rises partly up the tube a bit like it does in a thermometer. We use mercury in barometers because it's more convenient than using water. Water is less dense (less HEAVY, in effect) than mercury so air pressure will lift a certain volume of water much higher up a tube than the same volume of mercury. In other words, if you use water, you need a really tall tube and your barometer will be so enormous as to be impractical. But if you use mercury, you can get by with a much smaller piece of EQUIPMENT.

Answer:

EXPLANATION:The rate law and the law of MASS ACTION explains the CHEMICAL kinetics of reactions. ... The main difference between rate law and law of mass action is that, rate law is given considering only the reactants of a REACTION whereas law of mass action is given considering both reactants and products of a reaction.

EXPLANATION:

the MOLECULAR FORMULA of METHANE is CH4

STRONG ACID and strong BASE

ANSWER:

Two FACTORS determine WHEATHER a substance is a SOLID, a liquid, or a gas

Answer:

Potato is an underground STEM. The plants synthesise FOOD (glucose) in the leaves by the PROCESS of photosynthesis.

Answer:

As we have studied the reactivity series of metals.

Copper LIES lower than Hydrogen, WHEREAS Zinc is above Hydrogen.

Explanation:

Therefore Zinc can easily liberate Hydrogen as COMPARED to Copper.

Reactions :

Zn + HCl ---------> H2

Cu + HCl ----------> No REACTION

bcozzz they react with oxygen particles. ...so they form a BLACK substance

oxygen is a HIGHLY reactive METAL so,any TYPE of metal can be react with oxygen and FORMS another substance.।।।।।।

the black substance is AG2o silver dioxide

150 ML is the CORRECT ANSWER

A compound is a substance FORMED when two or more elements are chemically JOINED. Water, SALT, and sugar are examples of compounds. When the elements are joined, the atoms lose their INDIVIDUAL properties and have different properties from the elements they are composed of.

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ANSWER:

Why do the silver articles turen blacks coken KEPT in open for few day name the black substance from GIVEN it chemical formula.Why do the silver articles turen blacks coken kept in open for few day namethe black substance from GIVE it chemical formula

Explanation:

Answer:

6.022×10^22 molecules

Explanation:

MOLECULAR mass of CANE sugar (C6H22O11) = 342g

1 mole of C6H22O11 = 342g

342 g of cane sugar CONTAIN 6.022 X 1023 molecules

34.2 g of cane sugar will contain = 6.022 x 1022 molecules

Answer:

EQUAL mass of O2 and o3 contains same number of atoms.

Explanation:

let equal masses be x grams

no.of MOLES=given gram mass/ MOLAR mass

no.of moles of O2=x/32

no.of molecules of O2=(x/32)N

[here N represent avagadro's no.]

no.of atoms of O2=(x/32)N*2

=(x/16)N atoms

no.of moles of O3=x/48

no.of molecules of O3=(x/48)N

[here N represent avagadro's no.]

no.of atoms of O3=(x/48)N*3

=(x/16)N atoms

The harmful MIXTURE of SMOKE and FOG that HARMS the ENVIRONMENT is known as Smog.

Hope it helps ❤

Universal indicator is an indicator which is widely and mostly used to detect acidic or basic property of a substance.

Example Litmus paper , Blue litmus turns red in presence of ACID and red litmus turns blue in presence of a base.

USE-->>

It is us to detect the nature of substance i.e. acidic basic or neutral

METHYL ORANGE: Orange colour of it turns pink in presence of an acid and it turns yellow due to a base.

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nduwkhs TH H h DG hsyuefejsgefejsus HF ehjsed

EVERY element has different configuration of electrons and different ORBITAL structure...that's what MAKE them vart their eq. mass

kinetic ENERGY of liquid is more than SOLIDS because the liquid molecules possess GREATER amount of HEAT energy than solids. The molecules vibrate at a greater rate than solids, thus their amplitude is also larger than solid molecules. More heat energy means that the average kinetic energy of liquids would be higher than solids.

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ANSWER:

SMOG is the TYPE of AIR POLLUTION

PARTICLES of matter attract each other. There's a force that ACTS on the particulate matter that keeps it TOGETHER. ... This proves that attraction varies from particles of ONE substance to another. Cohesion means the force of attraction between the particulate matter of the same substance.

Stereocenters are labeled R or S. The "right HAND" and "left hand" NOMENCLATURE is used to name the enantiomers of a CHIRAL compound. The stereocenters are labeled as R or S. Consider the first PICTURE: a curved arrow isdrawn from the highest priority (1) substituent to the lowest priority (4) substituent.

The Bohr MODEL can be summarized by the following four PRINCIPLES: Electrons occupy only certain orbits around the NUCLEUS. Those orbits are STABLE and are called "stationary" orbits. Each orbit has an energy ASSOCIATED with it.

100 g of CALCIUM CARBONATE (100,000 mg of Calcium Carbonate) has 3 moles of Oxygen atoms = 3 x 6.022 x 10^23 Oxygen atoms.

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As a diatomic MOLECULE, fluorine has the weakest bond DUE to repulsion between ELECTRONS of the small atoms. ... Therefore, the physical state of the ELEMENTS down the group changes from gaseous fluorine to solid iodine. Due to their high effective nuclear charge, halogens are highly electronegative.

ANSWER:

The Claisen CONDENSATION is a carbon– carbon bond forming reaction that occurs between TWO ESTERS or ONE ester and another carbonyl ... That is, Claisen condensation does not

no and equivalent mass of an element cannot be ever zero INSTEAD of that it can be ONE or SOMETIME NEGLIGIBLE but not EXACTLY 0.

Hey MATE ...

here's the answer ...

Bioaugmentation is a process in which microorganisms are PRACTICALLY ADDED for biodegrading soil and contaminants.

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Answer:

The Schrödinger EQUATION is a linear partial differential equation that describes the wave FUNCTION or state function of a quantum-mechanical system. It is a KEY result in quantum mechanics, and its discovery was a significant LANDMARK in the development of the SUBJECT.

TAMARIN USED for CLEANING METAL

ANSWER:

Ans

K=C+273

k=1273k (GIVEN)

therefore.

C=K-273

C=1273-273

C=1000°C

and

C=100°C

K=C+273

K=100+273

K=373 K

Answer. I HOPE it HELPS You

Answer:

In a CUBIC close-packed (CCP) ARRANGEMENT of ATOMS, the unit cell consists of four layers of atoms.

ANSWER:

I HOPE this HELP you

Compound A=CaO (CALCIUM oxide or quick lime)

Compound B=Ca (OH)2 (calcium hydroxide or slaked lime )it produce heat in large amount

Compound C=CaCO3 (calcium carbonate)

Answer:

the freezing point is the temperature at which the solid and the liquid dates of the SUBSTANCE have the same vapour pressure.

it has been observed that when a non-volatile solute is added to a solvent, the freezing point of the solution is always lower than that of the pure solvent.

THIS IS THE SAME ANSWER I HAVE WRITTEN IN MY FST PERIODIC TEST AND I GOT FULL MARKS SO I HOPE THAT THIS WILL HELP YOU.

PLZZZ ATLEAST GIVE THANKS THAN ONLY I WILL KNOW THAT U GOT/UNDERSTOOD MY ANSWER..............

Answer:

milk SHOW Tyndall EFFECT because it is COLLOIDAL solution.

NUMBER of MOLES= 0.0945/22.4

= 0.00421875

MOLECULAR MASS= 0.2331/0.00421875

=52.88

ANSWER:

a SET of numbers that describes about the situation of of ELECTRON in an ATOM

METHOD of FIND LOG is ULTRASOUND

Answer:

no

EXPLANATION:

COMPARISON of HYDROGEN GENERATE by water not URINE