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49901.

The residue when you mix caco3 and hcl

Answer» CALCIUM CHLORIDE ()PLS MARK IT BRAINLIEST!
49902.

What does a drought result in ? Answer in long .​

Answer»

*Wetlands Dry Up. ...Pollution of Surface WATER. ...The Health of Plants Is Adversely IMPACTED. ...DUST Storms Become Common. ...LOSS of Biodiversity. ...Wildfires Become Common. ...Animals Are Forced to MIGRATE. ...Increased Desertification.*PLS MARK ME AS BRAINLIEST

49903.

Methane burns in oxygen to form carbon dioxide and hydrogen​

Answer» METHANE (CH4) ( C H 4 ) BURNS in OXYGEN to produce carbon DIOXIDE and water vapor. The balanced equation is: CH4+2O2→CO2+2H2O C H 4 + 2 O 2 → C O 2 + 2 H 2 O .PLS MARK ME AS BRAINLIEST
49904.

(c) Name ONE chemical that can be used to monitor the change of pH values. (1 mark)

Answer»

WGSNsExplanation:Is is USED to MONITOR

49905.

Part A True or false (3 marks; 1 mark each) Write 'T' for a true statement and 'F' for a false statement. 1.Neutralization can change the pH value of a solution. 2.Oxygen is one of the products formed in neutralization. 3.If the soil is too acidic, the farmers can add slaked lime to the soil to regulate its pH value.

Answer»

(1)TRUE(2)FALSE(3)TrueExplanation:HOPE it helpsthank you

49906.

Compounds having same molecular formula but different structral formula are called​

Answer»

they are CALLED.. ISOMERS HOPE it HELPS.....

49907.

Propane is saturated or unsaturated or partially saturated or fully unsaturated compound ​

Answer» TION:PROPANE is a fully SATURATED compoundplz mark it as BRAINLIEST
49908.

Which is the smallest alkane​

Answer» METHANE (CH4) is the SMALLEST alkane. HOPE it helps. ...
49909.

Phropane is a ........ compound​

Answer» PROPANE is a CHEMICAL COMPOUND EXPLANATION:
49910.

What is the source of political power

Answer»

egitimate power.Referent power.Expert power.Reward power.Coercive power.Past research.Bargaining games.h໐pē it hēlpŞ ๓คrk คŞ thē ๖rคiຖliēŞt... ❣️

49911.

When the molality of solution becomes equal to its molality?

Answer»

Molality is defined as the no. of moles of SOLUTE per kilogram of solvent. Because the density of water at 25°C is AROUND 1kg/litre THUS the molality is approximately equal to molarity for DILUTE aqueous solutions at thistemperature.PLS MARK ME AS BRAINLIEST

49912.

The chemical present in the sun are

Answer» HELIUM is PRESENT in SUN
49913.

The method of changing the property of the metal is called.......what.... answer me immediately...​

Answer»

AnnealingPLS MARK ME AS BRAINLIEST

49914.

D-block elements are called ​

Answer» E CALLED CHALCOGENS MAY BEE
49915.

When proposed the scattering of alpha particles​

Answer» ERNEST RUTHERFORDHOPE IT HELPS MARK AS BRAINLIEST
49916.

.........gave a palm pudding model of an atom​

Answer» SEARCH j.j. THOMPSON's THEORY
49917.

Reaction in which oxidation and reduction takes place simultanously is call ....... reaction​

Answer»

it is CALLED REDOX REACTION.

49918.

CAL THE NUMBER OF MOLE OF IRON ATOM IN 168g OF IRON

Answer»

is 3Explanation: MOLE = mass/atomic mass.Mole = 168/56Mole= 3

49919.

Metalic character .............down the group in a modern priodic table ​

Answer»

Metallic character INCREASES down the group because atomic size increases and thus NUCLEAR PULL decreases. Thank you!

49920.

Define coordination number?​

Answer»

ation number :The number of ATOMS and IONS immediately surrounding of a CENTRAL atom in a complex or CRYSTAL.

49921.

O2,H2 and N2 are monoatomic,diatomic,polyatomic or triatomic​

Answer» EXPLANATION:DIATOMIC molecules are molecules composed of only two atoms, of the same or different chemical elements. The PREFIX di- is of Greek origin, meaning "two". If a diatomic molecule CONSISTS of two atoms of the same element, such as hydrogen (H2) or OXYGEN (O2), then it is said to be homonuclear.PLEASE MARK BRAINIEST
49922.

Pcl3 is known but Ncl5 is not known,why???

Answer» PHOSPHOROUS has d-orbitals and HENCE can ACCOMODATE the ELECTRONS from Cl into them, incase of N the d-orbitals are absent and electrons can be accomodated only in p-ornitals.Hence PCl exists.
49923.

What is the heat capacity​

Answer»

The amount of heat GIVEN t system is directly PROPORTIONAL to temperture CHANGE is 'q' is amount of heat from t1 to t2 so,t1      t2q proportionl to (t2-t1)q     ''      ''        ''   DELTA Tq=C delta Twherec=constant heat capacity.PLEASE MARK AS BRAINLIST ...

49924.

6.022×10^23 molecules is a which number​

Answer» AVAGADRO's NUMBER 6.022*10^23 isAvagadro's number
49925.

How to solve moles and tell an easy way to balance equations

Answer»

First write all the elements on TWO sides then start solving one by oneExplanation:PLS MARK the ANSWER as branliest

49926.

EXAMPLE OF PHYSISORPTION AND CHEMISORPTION...​

Answer»

tion:The adsorption of GASES (like nitrogen, hydrogen etc) on the surface of adsorbents like charcoalExamples include MACROSCOPIC PHENOMENA that can be very OBVIOUS, like CORROSION,

49927.

Water is a element compound or mixture​

Answer» WATER is a COMPOUND not a MIXTURE
49928.

WHAT IS THE DIFFERENCE BETWEEN PHYSISORPTION AND CHEMISORPTION?​

Answer»

rption is non- specific in nature. It INVOLVES Waal's INTERACTION between ADSORBATE and adsorbent. ... CHEMISORPTION is highly specific in nature as it involves CHEMICAL bond formation between adsorbate and adsorbent.

49929.

Pcl5 banta hai ncl5 nahi banta hai keyo

Answer» RZI YARR CHILL XD
49930.

How to separate salt solution from sugar solution?

Answer» EVAPORATE the SALT SOLUTION and SUGAR solution
49931.

Substance which always have a fixed composition​

Answer»

These KIND of SUBSTANCES which ALWAYS have a constant or fixed composition are KNOWN as pure substances

49932.

AC TURA Analytical procesAn analyst is reallyanalytical processFollowing Slipsa problemConsubSolvw. Thetheof1. Defining the problemSclecting the method3 obtaining a representative Sample6 preparing Sample for analysepuzon any necunory Chemical Separationpabern the measurment. Calculate the result and report.​

Answer»

I don't KNOW PLEASE ASK any ONE

49933.

Define atoms *follow* *me* *plzz*

Answer»

is the SMALLEST PARTICLE of a CHEMICAL ELEMENT that can EXIST.

49934.

Relation between torque and momentum​

Answer» TORQUE is the RATE of change of angular momentum. Force in linear motion CORRESPONDS to Torque in rotary motion. ... Therefore, the relationship between angular momentum (l) and torque (T) is that dl/dt = T. Torque equals the time DERIVATIVE of angular momentum.Explanation:your problem's SOLUTION here
49935.

Which two type of element does sand contains

Answer»

tion:Silica sand is made up of two MAIN elements: silica and oxygen. Specifically, silica sand is made up of SILICON DIOXIDE (SIO2). The most common FORM of SiO2 is quartz – a chemically inert and relatively hard mineral.

49936.

Explain the following 1. Alicyclic compound 2. Heterocyclic Fill in the blank: 1. General molecular formula for alkanes________2. General molecular formula for alkenes_______3. General molecular formula for alkynes_____ Answer correctly!!!​

Answer»

am representing ‘N’ as ₂ as there is no subscript in my KEYBOARD ‘n’is number of atoms of a ELEMENT So 1)C₂H2×₂+22) C₂H2×₂3)C₂H2×₂-2

49937.

Flourine exhibit only-1oxidation state whears as other Halogens exihibit +ve oxidation state of+1 , +3, +5, +7.why?

Answer» TION:FLUORINE doesn't have EMPTY d-orbital while OTHERS have
49938.

How HCN show tautomerisation......?​

Answer»

Yes, HCN (hydrogen CYANIDE's) Tautomer is HNC (hydrogen ISOCYANIDE, it exists in the interstellar medium as a COMPONENT of DENSE molecular clouds). Anyway the reason is simply because N has 2 paired electrons ready to be protonated

49939.

Which of the following pairs of compound illustrate law of multiple proportions?(1) KOH, CsOH(2) H20, D20(3) Ethane, benzene(4) KCI, KBr Why? ​

Answer»

of MULTIPLE PROPORTIONS. please FOLLOW me friends ok BYE friends.

49940.

Plz explain this question​

Answer»

d CH3 CH2 CHO AND CH2 _ CH _ CH

49941.

Why does a mixture not have a fixed melting and fixed boiling point ?give two reasons

Answer»

mixture MEANS addition of two or more than two ELEMENTS so they do not have FIX melting and BOILING point

49942.

When a gas is compressed, iyvgets heated up. Explain it on the basis of first law of thermodynamics.

Answer»

dujfgurtyuuExplanation:ruhtyiiuftyyiiguiojhttyuiiurrryyuuiiuuuuiiokhhhdg jujhi

49943.

Assertion(a): following is a balanced chemical equation for the action of steam on iron : 3Fe + 4H2O gives Fe3O4 + 4H2. Reason(r): the law of conservation of mass holds good for a chemical equation(a) both a and r is true and r is correct explanation of a(b) both a and r is true and r is not the correct explanation of a(c) a is true but r is wrong(d) a is wrong but r is true​

Answer»

i THINK its ANSWER is C.

49944.

Why is aluminiam a god product for cooking utensils

Answer»

because it ALLOW HEAT to CONTAIN them

49945.

What s the melting point?

Answer»

malting point is that point of temperature at which the SOLID BEGINS to CONVERT into LIQUID

49946.

Which of following is strongest base

Answer» NAOH , Mg(OH)2 , KOH , CA(OH)2
49947.

Petrol, diesel, kerosene, asphalt ki smell kisko kisko achchi lgti h ???Reply fast......​

Answer»

yaarbahaut acchi hoti HAI ...PETROL ,diesel ,books , SMELL of ground after rain ..

49948.

Ix)Acidic hydrogen is present in- d. Dimethyl acetylenea acetyleneb. ethanec. ethylene​

Answer» B. ethaneExplanation:HOPE it HELP U
49949.

Calculate the mass of one molecule of oxygen.( atomic mass of oxygen = 16)

Answer» ONE molecule of oxygen CONTAIN two ATOMS of oxygen 2×16=32g PER MOLE
49950.

explain the combustion and substitution reactions of carbon components compounds by taking Methane as an example ​

Answer»

combustion reacn means carbon /organic COMPOUNDS react with oxygen EXPLANATION:CH4 +2O2 give rise to CO2+2H2Osubstitution reacn means less reactive compounds are replaced by HIGHLY reactive compounds.