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m=mol of solute/ mol of SOLVENT (kg)Mol of solute/mol of solution =mole fraction=0.2 (given)Mol of solution /mol of solute =1/0.2Sub both SIDE by 1Mol ofsolvent/molof SOL=(1/0.2)-1=4Explanation:thus mol of solute/mol of solvent=molality=1/4Pls MARK ad BRAINIEST

what EXPLANATION:WRITE the RIGHT ANS.

0.07gmExplanation:At STP, 1 MOLE of any gas has a VOLUME of 22.4 L.Molar mass of CO = 12 + 16 = 28 g/molTherefore,22.4 L ( 22400 cm3) is the volume of 28g CO at STP56 cm3 will be the volume of (28/22400) X 56 = 0.07 g of CO at STP.HOPE THIS HELPS YOU ¶ THANK YOU ¶PLEASE MARK AS BRAINLIEST ™®

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Generally, ionic crystals form from a combination of Group 1 or 2 metals and Group 16 or 17 nonmetals or nonmetallic polyatomic ions. Ionic crystals are hard and BRITTLE and have high melting POINTS. Ionic COMPOUNDS do not conduct electricity as SOLIDS, but do conduct when molten or in aqueous solution.

Helium is a chemical element with the symbol He and atomic number 2. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, the first in the NOBLE gas GROUP in the periodic table. Its boiling POINT is the lowest among all the elements. Helium is the second lightest and second most abundant element in the observable universe.pls pls mark me as brainest ANSWER!!!!!

chldmhxlhxlhdkhxlhdlufuldluxludludlhxExplanation:gzgzhlzcljchl VM,cn&(HK KG,k,MV&(

in NEUTRALIZATION reac. the heat is evolved because in it the break down of compound take PLACE by \: SILENT\:HORROR FOLLOW ME AND MARK ME BRAINLIESTExplanation:

For organic chemistry conversion, you must know some tricks or you can also form some HACKS and tricks (which you will LEARN by practice).EXPLANATION:KINDLY go through these, it will help you much more . MARK as brainly please.

The above question is from the CHAPTER 'Some BASIC Concepts of Chemistry'.MOLARITY: Number of moles of solute present in 1 litre of solution is called molarity.Unit of Molarity = Molar (M)•When volume is given in litres,Molarity = Number of moles of solute ÷ Volume of solution in litres•When volume is given in millilitresMolarity = (Number of moles of solute × 1000) ÷ Volume of solution in ml•When mass % and density is given,Molarity = (Mass % × Density × 10) ÷ Molar mass of SoluteGiven question: The number of moles of NaCl in 3 litres of 3 M solution is(a) 1(B) 3(c) 9(d) 27Answer: Molarity = Number of moles of solute ÷ Volume of solution in litres3 M = Number of moles ÷ 3 L3 × 3 = Number of moles ∴ Number of moles of NaCl = 9 Or3 M means 3 moles in 1 litre of solution.⇒ Number of moles in 3 litres solution = 3 × 3 = 9 moles∴ Number of moles of NaCl = 9 (c) 9 is the CORRECT answer.

tion:The mitochondrion (/ˌmaɪtəˈkɒndrɪən/,[1] PLURAL mitochondria) is a semi autonomous double-membrane-bound organelle found in most eukaryotic ORGANISMS. Some CELLS in some MULTICELLULAR organisms may, however, lack mitochondria (for example, mature mammalian red blood cells). A number of unicellular organisms, such as microsporidia, parabasalids, and diplomonads, have also reduced or transformed their mitochondria into other structures.[2] To date, only ONE eukaryote, Monocercomonoides, is known to have completely lost its mitochondria,[3] and one multicellular organism, Henneguya salminicola, is known to have retained mitochondrion-related organelles in association with a complete loss of their mitochondrial genome.[3][4][5]

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>> "HIGH" M.P and B. P........................!

A SOLUTION is PREPARED by DISSOLVING 5g of NON volatile solute in 95 g of water. It has a vapour pressure of 23.375 mm hg at 25°c. ... (VP of pure water at 25°c is 23.75mm hg)

1. Combination Reaction :Two or more reactant combine to form a single product. 2 Mg (s) + O2 (g) → 2 MgO Magnesium Oxygen Magnesium oxide (White ash) (basic) turns Red litmus blue 2. Decomposition Reaction: A single compound decomposes or break down to give two or moresimpler substances. 2 FeSO4 (s).symbol of het Fe2 O3 (s) + SO2 (g) + SO3(g) Ferrous Sulphate Ferric oxide SULPHUR Sulphur (green) (brown) dioxide trioxide 3. Displacement Reaction: A more reactive element [metal] displaces less reactive elemen [metal] from its aqueous salt soln Fe (s) + ZnSO4 (aq)      → FeSO4 (aq) + Zn (s) (Colourless) (green) 4. Double Displacement Reaction: Aqueous soln of two ionic compounds react by exchange of their ions is called double displacement Reaction BaCl2 (aq) + Na2SO4 (aq) → BaSO4 (s) + 2 NaCl (aq) Pb(NO3)2 + 2 KI (aq) → PBI2 ( ↓ ) + 2 KNO3 (aq) 5. Oxidation Reaction: In oxidation reaction, addition of oxygen or removal of hydrogen or loss of electron takes PLACE. 2 Mg(s) + O2 (g)  →  2MgO (s)  2 Cu + O2  →  2 CuO (Black ) (Copper II Oxide)   6. Reduction Reaction: In reduction Reaction addition of hydrogen or removal of oxygen or gain of electron takes place. CuO(s) + H2 (g)  →Cu(s) + H2 O (l)   7. Redox Reaction: Reaction involving both oxidation and reduction simultaneously CuO (s)+ H2   →  Cu(s) + H2 O (l).   8. EXOTHERMIC Reaction: Reaction in which heat is evolved. C (s) + O2 (g)   → CO2 (g) + Heat 10. Neutralisation Reaction : When an acid and a base react together to form salt and water.  HCl (aq)  +  NaOH (aq)  →  H2O (l)  +  NaCl (aq)  (acid) (base)  (Water) (Salt)  Hydrochloric acid  Sodium hydroxide   Sodium ChlorideExplanation:

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A coupling reaction in organic CHEMISTRY is a general term for a variety of reactions where two fragments are joined together with the aid of a metal catalyst.pls MARK me down as BRAINIEST ANSWER!!!

combination reaction refers to the type of reaction in which two or more PRODUCTS COMBINE to form one SINGLE REACTANT. this is called combination reaction....HOPE it helps.....Mark brainliest...:)

just trynna GET POINTS EXPLANATION:SRY

t of PRESSURE is PASCAL. 1 Atmospheric pressure that is 1ATM= 101325pa.HOPE THIS WAS HELPFUL FOR U.

s concentrated stuff, it is (i) dense, and (ii) this density is combined with an EXCEPTIONALLY SMALL molar mass.....And we wants the quotient... MOLES of solutekilograms of solvent ...and here the solute and the solvent are the same thing...And so we CALCULATE... 1000⋅g18.01⋅g⋅mol−11⋅kg=55.5⋅mol⋅kg−1 ...

The reaction of an acid with a base to give salt, WATER and HEAT is called neutralisation. Example: When hydrochloric acid reacts with SODIUM hydroxide, sodium chloride and water are PRODUCED. The heat evolved in the neutralisation reaction raises the temperature of the reaction MIXTURE.

(3) except PD maximum e-s in OUTERMOST SHELL are 8....... is the right answerExplanation:mark as brainleist

I THINK option 1Explanation:friends I'm Harsha VardhanI would like to ask you some questions that would improve your knowledgeBut that DEPENDS upon your interest if you are INTERESTED plz send it in the COMMENT box

(I)FESO4 +BaCl2= FeCl2+BaSo4               (2)Zn+H2SO4(dilute)= ZNSO4+ H2(gas)

The 4 main types of Chemical reactions are,1. Chemical COMBINATION reactionEx. 2Mg+ O2 -> 2MgO2. Chemical Decomposition reactionEx. 2H2O-> 2H2 + O23. Chemical Displacement reactionEx. CuSO4 + Fe -> FeSO4 + Cu4. Chemical Double Displacement reactionEx. BaSO4+ CuCl2 -> BaCl2 + CuSO4Explanation:Other types of reactions INCLUDE,Oxidation reactionReduction reactionExothermic reactionEndothermic reaction

tion:radioactivity is made by marie CURIE . we LISTEN music on RADIO and many lots of things . radio is like a ACTIVITY so we give the name radioactivity

hello friendThe protein fiber of silk is composed mainly of fibroin and is produced by certain insect larvae to form cocoons. The best-known silk is OBTAINED from the cocoons of the larvae of the MULBERRY silkworm Bombyx mori REARED in CAPTIVITY (sericulture).Explanation:please mark my answer as the branlest.

- ATOMUC STRUCTURECONCEPT :- In Bohr's stationary ORBITS, energy is quantized and the energy if the electron at nth orbit is GIVEN by -13.6 n²/z eV.SOLUTIONSEnergy of electron in 3RD orbit = -13.6 × 1/9Energy of electron in 2nd orbit = -13.6 × 1/4Hence. energy of PHOTON emitted = 13.6 ( 1/4 - 1/9) = 13.6 × 5/36 eV= 1.87 eV.Hence, wavelength of photon emitted = 12400/1.87 Å= 6631 Å

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this is the ANSWER of the QUESTION

H-C-H BOND ANGRE in. menthous is C2H4BR2

The Three Types which are used by metals which MAKES the most efficient USE of space is the PACKING by USING aluminium.please mark it as BRAINLIST answer ⭐⭐⭐

it BECOMES dilutedExplanation:

H² is in SOLUBLE because it is too light. please mark it as BRAINLIEST and ALSO click on a small HEART and follow me

2-Propanol is the IUPAC NAME of FOLLOWING REACTION.

6.02×2× 10 to the POWER of 23

h=1 cl=35.5 so HCL 36.5 NH 17

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If N is PRESENT:Na+C+N→NaCN METALLIC fusion from ORGANIC compound sodium cyanideIf S is present:2Na+S→Na 2 S (sodium sulphide)If both N and S are present:Na+C+N+S→NaSCNFrom organic compound sodium thioocyanate Option B is correct.

any METAL having valency 3such as berrilium phosphate. ALLUMINIUM. CHROMIUM etchope it HELPS mark it as BRAINLIEST ♥️♥️♥️

TissueExplanation:

tion:As we know the FAMOUS RELATION between MOLARITY and molality we could solve it very quickly.Let's seem= 1000M /1000d-MM2Wherem---> MolalityM----> Molarityd----> density of solution in g/mlM2---> Molar mass of SOLUTE (here is 23+16+1=40)So m= 1000 * 2/1000*1.28 - 2*40=2000/1200= 5/3=1.66667m