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44.8LExplanation:1 mole of no2 occupies 22.4 L VOLUME 2 MOLES occupies = 22.4*2= 44.8

HII DEARNickel is a chemical ELEMENT with the symbol NI and atomic number 28. It is a silvery-white lustrous METAL with a slight golden tinge. NICKEL belongs to the transition METALS and is hard and ductile.HOPE THAT HELPEDPLZMARKASBRAINLIESTALSOTHANKITPLZFOLLOW MEHAVE A GREAT DAYBYE♡♡♡♡♡

(a) Crystallization Explanation:Crystallization is used for purification of solid organic COMPOUND. In this technique, substances are dissolved in the hot solvent up to the saturation level. The substance gets crystallize after cooling down the solvent. Insoluble impurities can be separated by FILTRATION while solvent is still hot. The pure crystals of solid organic compound are collected by filtration, WASHED with the HELP of COLD solvent for removing the impurities upon the surface.

The PPM CONCENTRATION of O2 is 2

dust is a KIND of mixtureIn chemistry, a mixture is a material made up of two or more different substances which are physically combined.[1]A mixture is the physical combination of two or more substances in which the identities are retained and are mixed in the form of solutions, suspension and colloids.[2][3]Mixtures are one product of mechanically blending or mixing chemical substances such as elements and compounds, without chemical BONDING or other chemical CHANGE, so that each ingredient substance retains its own chemical properties and makeup.[4] Despite the fact that there are no chemical changes to its constituents, the physical properties of a mixture, such as its melting point, may differ from those of the components. Some mixtures can be separated into their components by USING physical (mechanical or thermal) means. AZEOTROPES are one kind of mixture that usually poses considerable difficulties regarding the separation processes required to obtain their constituents (physical or chemical processes or, even a blend of them).[5][6][7]

The PICTURE is so UNCLEAR

a,BAND C R CORRECT........

ose is C12H22O11 molecular MASS = 342 1 mole = 342 G 0.1mole= X GX = 0.1 × 342 = 34.2 g 2) Na2CO3molecular mass= 106 1 mole = 106 g 0.1mole= x gx= 10.6 g 3) gypsum is CaSO4.2H2Omolecular mass = 1721 mole = 172 g 0.5mole= x gx = 0.5 × 172 = 86 g

Metals with COLD water- 2Na + 2H2O -> 2NaOH + H2Metals with hot water- MG + 2H2O -> Mg(OH)2+ H2Metals with STEAM- Zn + H2O -> ZnO+H2Mark it as brainliest!

tion:हेय मेट यौर ANSWER इस हेयर under this is because थे delocalosation ऑफ़ electron TAKE place in phenol by resonance .phenol LOSES its इलेक्ट्रॉन to FORM phenoxide ions for stable itself ।that why its more acidic मेरी जिंदगी का हर खुस्बुरत पल हो तुम एक बात बोलू मेरी जान तुमारी कसम तू मेरी बहुत खास हो तुम

was QUESTION

what??SORRY o are U ANSWERING OK

Source: Wikipedia)The experimental setup for the Davisson and GERMER experiment is enclosed within a vacuum chamber. Thus the deflection and scattering of electrons by the medium are prevented. The main parts of the experimental setup are as follows:Electron gun: An electron gun is a Tungsten filament that EMITS electrons via thermionic emission i.e. it emits electrons when heated to a particular temperature.Electrostatic PARTICLE accelerator: Two opposite charged plates (positive and negative plate) are used to accelerate the electrons at a known potential.Collimator: The accelerator is enclosed within a cylinder that has a narrow passage for the electrons along its axis. Its function is to render a narrow and straight (collimated) beam of electrons ready for acceleration.Target: The target is a Nickel CRYSTAL. The electron beam is fired normally on the Nickel crystal. The crystal is placed such that it can be rotated about a FIXED axis.Detector: A detector is used to capture the scattered electrons from the Ni crystal. The detector can be moved in a semicircular arc as shown in the diagram above.Explanation:Mark as brainliest answerfollow me I will follow up with youbyegood afternoon everyone

what is MEANT by IEExplanation:

The overall REACTION 2S+3O2 +2H2O -->2H2SO43×32g of S GIVES = 2×98g H2SO45 KG S gives = X gm H2SO4X=(5000×196)/64 =15312 gm H2SO4H2SO4 formed = 15.312

D)) the AZIMUTHAL QUANTUM no DETERMINE the SHAPE of ORBITAL

beechmehasgyime EZRA

alt comes first because as we know the modern periodic table is based on the increasing order of ATOMIC NUMBER. So the atomic number of cobalt is 27 and nickel is 28. That’s why cobalt comes first in the modern periodic table.(b) The Electronic configuration of Hydrogen is similar to that of ALKALI metals. Just like alkali metals, it reacts with halogens, Oxygen and Sulphur to FORM compounds of similar formulae. On the other hand, Hydrogen reacts with metals and non-metals just like halogens. Due to this anomalous behaviour of Hydrogen, Mendeleev was UNABLE to fix a position for it...

Explanation:The DIAGRAM for the same REPRESENTS the table as - a - 3 b - 4 c -5 d - 6 e - 7 f - 8 g - 9 h -10 i - 11 j- 12 K - 13 l - 14 m - 15 n - 16 o - 17 p - 18 (i) Element one has the larger atom. In the periodic table, the element's atomic radius reduces as it moves in a period from left to right.(ii) k has a higher valency.ELECTRONIC configuration of k : K L M - 2 8 3Thus, the valency for k = valence electron of K = 3Electronic configuration of o: K L M -  2 8 7Thus the, valency for o = 8 - valence electron of o = 8 - 7= 1(iii) Element I is more metallic since I belong to the periodic table's left side and group 1. The metallic character reduces when moving from left to right in a period.(iv) Element g is more non-metallic, as the non-metallic character rises in a period when it moves from left to right.(v) Elements b or j components are metals with a 2 valence as they have 2 valence electrons and are put on the left side of the periodic table.(vi) The elements f or n are metals with a valency of 2 .Electronic configuration of f : K L  - 2 6    Valency of f = 8 - valence electron = 8 - 6 = 2Electronic configuration of n : K L M  - 2 8 6Valency of n = 8 - valence electron= 8 - 6 = 2

in MODERN PERIODIC table have 4 blocks fist s ND p nd p last grop element hv ful electron in these elements

hyy mate here is your ANSWER....BASE: The SUBSTANCE which has a soapy feel and bitter in taste is KNOWN as Base.hope it will HELP you....Thanks for asking......

when SODIUM BICARBONATE is HEATED it CONVERT into sodium CARBONATE

An ORGANIC COMPOUND when warmed with ethanoic acid ( CH3COOH) in presence of Concentrated Sulphuric acid (H2SO4) , it gives sweet smelling ester.That organic compound is ethanol, which is an alcohol and has OH as functional group which is attached to the second carbon atom.The structural FORMULA of ethanol is CH3CH2OH.So, ethanol on reacting with ethanoic acid in the presence of Conc H2SO4 , undergoes esterification reaction that eliminates water and PRODUCES ETHYL acetate.CH3CH2OH + CH3COOH -> CH3COOCH2CH3 + H2O

The COMPOUND A is ethanoic acid which has a structural formula CH3COOH. It gives a pop sound when reacts with sodium because hydrogen GAS is evolved. Compound B is sodium ethanoate, which has a structural formula of CH3COONa. It is formed by the reaction of ethanoic acid with sodium.Methanol, an alcohol is the compound C, which when treated with ethanoic acid forms a compound D in the PRESENCE of concentrated H2SO4.Compound D is an ester which smells sweet. It is methyl ethanoate with the structural formula of CH3COOCH3. CH3OH + CH3COOH ->CH3COOCH3 +H20Methanol and sodium ethanoate is gained back, when methyl ethanoate reacts with sodium hydroxide.CH3COOCH3+ NaOH-> CH3OH+ CH3COONa

X is a neutral organic compound with the formula of C2H6O. So X is ethanol. Ethanol is an ALCOHOL with structural formula being CH3CH2OH. OH is the alcohol group.On OXIDATION of ethanol with potassium dichromate, we get Y. So Y is ethanoic acid which is a carboxylic acid. Alcohol when oxidised gives aldehyde and atlast gives acid.Z is a sweet SMELLING substance produced by combining X and Y in presence of concentrated H2SO4. So, Z is ETHYL ethanoate ester.

is made in the laboratory by the process of Saponification. The process involves REACTING a vegetable oil, like palm oil, or olive oil with ALKALI, like Sodium Hydroxide. The reaction is exothermic in NATURE, liberating heat during the reaction. The final white suspension thatare the products of the reaction, contain soap and glycerol.b. When we add salt which is sodium chloride, it gets ionised in water and the sodium ions causes the sodium ions of soap to combine with the fatty acid ions and separate as solid soap. This helps in complete removal of soap from the reaction mixture.c.Hard water contains bicarbonates, CHLORIDES, and sulphates of calcium and magnesium which react with soap molecules forming insoluble PRECIPITATES called 'scum'. Hence, strenght of soap molecules are lost in the chemical reaction and they are not available for cleansing action.

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tion:a) on adding a 5% ALKALINE potassium permanganate (KMNO4) solution drop by drop to  some WARM ethanol in a test-tube the colour of KMnO4 will disappear as it will take part in the oxidation of ethanol. Thus, ethanol is oxidized to produce ethanoic acid. The chemical reaction will be - C2H50H →→ (KMNO4) CH3COOH where (KMNO4) is the oxidizing agent.b) Based on their reaction to carbonates and hydrogen carbonates, we can distinguish between an alcohol and a carboxylic acid. Acid responds to the DEVELOPMENT of CO2 gas with carbonate and hydrogen carbonate, which makes lime water milky. On the other hand, alcohols do not react with carbonates and carbonates of hydrogen.

a)In the presence of concentrated Sulphuric acid , Propanoic acid will react with Methanol to give esters.CH3CH2COOH + CH3OH -> CH3CH2COOCH3 + H20 Propanoic            Methanol    Methypropanoate  acidb) When a soap solution is being tested with red litmus paper it turns into blue due to its BASIC NATURE and no change is observed in case of blue litmus paper.c) By addition of substances like methanol, copper sulphate, pyridine, in ethanol it is made UNDRINKABLE which is CALLED denaturation  of ALCOHOL.  To prevent the drinking alcohol from being mishandled or misused it is being denatured.

Electron is that subatomic particle CONSIDERED to be MOVING in an atom around the nucleus.• It is NEGATIVELY charged.• Charge on an electron = 1.6 × 10⁻¹⁹ C• Lighter than proton.♣ Proton and neutron are another subatomic particles. They are not movable. They are PRESENT inside the nucleus.

Sodium is high REACTIVE element. If it is kept in open it can explosively REACT with oxygen to catch fire. Hence to prevent ACCIDENTAL damage sodium is immersed in KEROSENE oil.

i HOPE it HELP youExplanation:Carboxylic ACID GROUP, -COOH gives brisk effervescence with NaHCO3 plss MARK brainlist