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47901.

16. A solution is prepared by adding 12.6 g of oxalic acid in 250 ml of water. Calculate the molarity of the solution. (Molar mass of oxalic acid = 126 g/mol) [OR] Concentrated H2SO4 is 93% acid by mass and has density 1.84g/cm3. Calculate its molarity. (Molar mass of H2SO4 = 98 g/mol) (2 Points)

Answer»

The FIRST no.s ANSWER is 25

47902.

2. Calculate the mass of sulfur dioxide produced by burning 16 g of sulfur inexcess of oxygen in contact process.(Average atomic mass : S = 32 u.0 = 16 u(Ans, 32 a​

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The correct answer is 32g.Explanation:The reaction is S + O2→ SO2↑32 g of S reacts with 32 g O2.16 g of S reacts with 16 g O2. Total mass of produced SO2 is 16+16 g = 32 g.PLEASE MARK AS BRAINLIEST ANSWER DON'T FORGET TO PRESS ON THANKS IF YOU FIND IT HELPFUL

47903.

Name the colour of the ppt. of: (1) Calcium hydroxide (2) Zinc hydroxide (3) Iron (III) hydroxide in the presence of limited Sodium hydroxide

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te powder/Colourless(2) GELATINOUS white(3) Brown COLOUR

47904.

Write all the isomers of molecular formula c7H8o

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The TOTAL NUMBER of isomers possible for an AROMATIC COMPOUND of formula C7H8O are 5.

47905.

Nimnalikhit yuvaon ke padon mein vibhed kijiye kristal Jalak AVN akoko kosa tikka

Answer»

???????????????????????????????EXPLANATION:

47906.

Which method is used to separate a mixture of solid copper (||) sulfate and sand.​

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by using a suitable solventExplanation:by POURING water in a copper sulphate and SAND the copper sulphate dissolves and the sand REMAINS a t the bottom. Now by filtration we will get sand. and by EVAPORATING cuso4 solution we will get solid copper sulphate

47907.

To which period A and B belongs to?​

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what do you MEAN PLZ GIVE CORRECT QUESTIONS

47908.

Write formula of the campound formed after correction of iron​

Answer»

The highest common factor is found by multiplying all the FACTORS which appear in both LISTS: So the HCF of 60 and 72 is 2 × 2 × 3 which is 12.

47909.

CHEMISTRY EXPERTS ANSWER THE QUESTIONS PLEASE...... Give the Electronic configuration of 1) Calcium ion2)Suphur3)Chloride ion4)Sodium in5)Hydrogen​

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tion:When looking at ELECTRON configuration, your fill order of electrons is:1s2s 2p3s 3p 3d4s 4p 4d 4f5setc.Group 1A (1), the alkali metals all end is s1. What period the element is in determines the 1st number.Example: H ends in 1s1 (even though H is not a metal, it resides in this group because it also has one valence electron)Li ends in 2s1 (lithium is in period 2)Na ends in 3s1 ( sodium is in period 3)Group 2 elements (2A), the alkaline earth metals, all end in s2Group 3A, or 13 all end their electron configurations in p1. Boron ends in 2p1.In group 4A or 14, all elements end in p2. And so it goes.For the transition metals, GROUPS 3-12, there are many exceptions. The general rule is that the element's electron configuration ends in d and whatever place they are in. Scandium would end in 3d1, TITANIUM in 3d2, etc. The transition metals are behind by one period because the d electrons are high in energy.For the rare earth elements (the Lanthanides and Actinides), they end in f. Lots of exceptions here too. Cerium would end in 4f1, Pr in 4f2. These rare earth metals are 2 periods behind because the f electrons are even higher in energy than the d electrons.The "s block" on the PERIODIC table are groups 1 and 2; they end in s1 and s2.The "p block" on the periodic table are groups 13-18 and end in p1, etc.The "d block" on the periodic table are groups 3-12 make up the d block and the elements' electron configurations end in d.The "f block" on the periodic table are the Lanthanide and Actinide series.Good luck and have a great day!!

47910.

Iupac name of k2{cu(cn4)}​

Answer» POTASSIUM tetracyano Cuptrateit's your ANSWER
47911.

How many sigma and pi bonds are there in molecule A) CH2=CH-CH2-CH=CH2B) CH3-CH3​

Answer»

b is your correct answer here is your answer.......EXPLANATION:please mark me as brain LIST............

47912.

The anode of ------------- is called inert electrode​

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platinumExplanation:an INERT ELECTRODE is a metal submerged in an AQUEOUS solution of  ion compound that transfers electrons RATHER then changing ion with aqueous solution.

47913.

Ean number conh3) 6​

Answer»

its is a help u PLS mark me a brainliest and FOLLOW me

47914.

You might have noted that when copper powder is heated is Chaina dish, the surface of copper powder becomes coated with black color substance.a. How has this black coloured substance formed?b. What is the black substance?c. Write the chemical equation of the reaction that takes place.​

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the answer is given belowExplanation:Copper  reacts with oxygen in the AIR upon heating and FORMS copper OXIDE. The black SUBSTANCE is Copper (||) Oxide.CHEMICAL EQUATIONCu + O2-> 2 CuO

47915.

In water, oxygen surrounded by how many oxygen.​

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tion:WATER molecule A water molecule is made up of two hydrogen ATOMS and ONE oxygen atom.

47916.

What is universal indicator how it is differ with indicator​

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Indicator is the substance which indicates that a solution is acidic or basic in nature. • UNIVERSAL indicator is the MIXTURE of all the indicators. It SHOWS the pH VALUE, the nature and as well as the colour on the pH of the particular solution. pH scale is from 0-14.Explanation:i think it will help youplease follow memake my answer brainlist

47917.

Help help , help me guys please ​

Answer»

MonoxideAmmonium HydroxideDinitrogen monoxideNitric OxideAmmonia

47918.

Give the possible values of all 4 quantum numbers for the 21st electron in V (Z=23).​

Answer» V(Z = 23). = 3d^3 4s^2 so n=3
47919.

What mass of KNO3 is required to prepare 70g of KNO3 from its saturated solution at 80C? Its solubility at 80C is 150g and at 20C is 90g.​

Answer»

tion:So, you know that potassium nitrate, KNO3 , has a solubility of 155 g per 100 g of water at 75∘C and of 38.0 g at 25∘C .What that MEANS is that at 75∘C , you can dissolve as much as 155 g of solid potassium nitrate in water without the solution becoming saturated.Once you hit that 155 g mark, the solution becomes saturated, which means that the solution can't dissolve any more solid.Now, the same thing can be SAID for the solution at 25∘C . At this temperature, dissolving less than 38.0 g of potassium nitrate per 100 g of water will result in an unsaturated solution.At the 38.0 g mark, the solution will become saturated.Now, take a look at how the solubility graph for potassium nitrate looks likeSo, you are starting with 100 g of saturated solution at 75∘C . Mind you, you have 100 g of solution that contains as much dissolved potassium nitrate as possible.This solution will contain100.0g solution⋅155 g KNO3(155+100)g solution=60.78 g KNO3Now, potassium nitrate's solubility is given per 100 g of water. Calculate how much water you have in this initial solutionmwater=100.0 g−60.78 g=39.22 g Next, DETERMINE how much potassium nitrate can be dissolved in 39.22 g of water at 26∘C in order to make a saturated solution, i.e. have the maximum AMOUNT of dissolved potassium nitrate possible39.22g water⋅38.0 g KNO3100g water=14.9 g KNO3This means that when the initial solution is cooled from 75∘C to 25∘C , the amount of water that it contained will only hold 14.9 g of dissolved potassium nitrate.The rest will crystallize out of solutionmcrystallize=60.78 g−14.9 g=45.9 g

47920.

Find out the molecular mass of CaSO4.2H2O (H=1u, Ca=40u,S=32u, O=16u).​

Answer»

172Explanation:1×40+ 32×1 + 16×4 + 2×18=40+32+64+36=172

47921.

Column A 1. Decomposition of copper carbonate 2. Decomposition of potassium chlorate 3. Reaction of nitrogen and hydrogen 4. Reaction of zinc and hydrochloric acid 5. Reaction of sulphur dioxide and oxygen Columns B a. oxygen b. sulphur trioxide c. hydrogen gas d. ammonia e. carbon dioxide

Answer»

#justiceformanishaExplanation:FOLLOW ME

47922.

Convert the following into mole.20 g water​

Answer»

ass DIVIDED by MOLECULAR mass So 1.111 mole of WATER

47923.

The weight of an object on the earth is about......... Times Is it's weight on the moon. ​

Answer»

the WEIGHT of the OBJECT in MOON

47924.

An element X has a atomic number 13 i) State whether its metal or non metalii)Its valencyiii)what type of bond it will form​

Answer» OPTION TWO is correct✅✔☑
47925.

Convert tge following into mole.12 g oxygen​

Answer» HIIIIII.............
47926.

One of the following drug is used for soap preparation​

Answer»

tion:Nitric acid used for making a drugs and used for fertiliser.calcium carbonate used for making soaps .please MARK BRAINLEST and follow me.Thank you so much dear FRIEND BYE.

47927.

What happens to an element "A" if its atom loses three electrons?

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Atoms of elements can lose or gain ELECTRONS making them no longer neutral, they become CHARGED. A charged atom is called an ion. When an atom loses electron(s) it will lose some of its negative charge and so becomes POSITIVELY charged. A POSITIVE ion is formed where an atom has more PROTONS than electrons.Explanation:MARK ME AS BRAINLIEST PLEASE

47928.

How to find ksp of PbSo4 at 25°?

Answer»

here is your ANSWER, you can WRITE anyone both are sameExplanation:hope it helps YOUPLEASE MARK as brainliest plzzzzzzz and follow me

47929.

Essay on living organisms in 100 words

Answer»

here is your answer in 100 wordsExplanation:HOPE it HELPS youplease MARK as BRAINLIEST plzzzzzzz and follow me

47930.

Write down the drawback of Rutherford model. 2. What are the names of the neutral, negatively charged and positively charged particles within an atom? 3. What are the steps involved in balancing a redox reaction in acid medium? 4. Write a short note on Homologous series

Answer»

7tx7tzrz9tezpgu€0%=-₩€%'sputxtx6rxu0tx06rx6rx6r

47931.

In a science lab, Cash mixes two clear liquids together in a beaker. Bubbles are produced, and a white solid forms and settles to the bottom. He plans to heat the beaker over low heat and make more observations. Which statement is most likely correct?

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tion:15 cm³ of LIQUID 'X' and 20cm³ of liquid 'y' are MIXED at 20⁰C and the volume solution was MEASURED to be 35.1cm³

47932.

B) Why ionization enthalpy of nitrogen 15 greater than oxygen​

Answer»

is HIGHLY stable when its valence orbital is COMPLETELY filled or half-filled and in nitrogen, the valence P orbital is exactly half filled. ... So, the ionization ENERGY of nitrogen is more than that of OXYGEN.

47933.

WRITE TRUE OR FALSE FOR EACH STATEMENT. REWRITE THE FALSE STATEMENTS CORRECTLY : 1. The substances that take part in a chemical reaction are known as products. 2. Whenever a chemical reaction takes place, there is no loss or gain of atoms. 3. Chemical reactions are broadly classified into four types. 4. The chemical formula of ammonia is N,Hz. 5. Copper salts are mostly blue in colour.

Answer»

1.false,the SUBSTANCE TAKE PART in REACTION is CALLED reactants2.true3.true4.false,NH35.true

47934.

Why is the B.pt of either lower than isomeric alcohol ?​

Answer» TION:क्वेश्चन स्ट्रांग above is your ANSWERMARK me BRAINLIEST
47935.

Match the following Fe 3+ what is answer a.At mass 16 b.dalton c.ferrous d. ferric​

Answer»

okExplanation:

47936.

State the mendleleev's periodic law​

Answer»

eleev PERIODIC table he stated that he arrange all the elements ACCORDING to the mass of the elements also he left GAP between the elements for the future invented elements so that they can SHIFT on that hole

47937.

रूबिडियाम परमाणु के संयोजक इलेक्ट्रॉन के लिए चार कुवांटम संख्याओं का सही सेट है । (z=37)*​

Answer»

I DON'TKNOW THE ANSWER OF THIS QUESTION because I have not do CALCULATION

47938.

1) why do alcohol have higher b.pt than halialkanes of similar molecular masses​

Answer»

The reason why alcohols have a higher boiling point than alkanes is because the intermolecular forces of alcohols are hydrogen BONDS, unlike alkanes with VAN der Waals forces as their intermolecular forces. The IMAGE below SHOWS ethanol molecules with a hydrogen bond.Explanation:HOPE itz help u

47939.

Calculate the wavelength of the lowest energy transition in the Brackett series of the electronic spectrum of the Li+ ion. The Rydberg constant for He is RLi = 109729 cm–1. 450 nm4050 nm91.1 nm30.3 nm​

Answer»

yhyExplanation:HUBBY! you! you G TVT

47940.

Write the uses of milk of magnesiaa) helping digestionb) toothpastec) batteries​

Answer» TOOTHPASTE..................
47941.

Metabolic acitivities of cells are controlled by.......... a) proteinsb) DNAc) RNAd) fat​

Answer» OPTIONS A , PROTEINS and PLEASE mark my ANSWER as BRAINLY
47942.

What is free radical addition​

Answer»

Free-radical ADDITION is an addition reaction in ORGANIC chemistry which involves free radicals. The addition MAY occur between a radical and a non-radical, or between TWO radicals. ... Initiation by a radical initiator: A radical is created from a non-radical PRECURSOR.

47943.

Is chlorofluorocarbon compound​

Answer»

tion:Chemically, CFCS are a PART of a group of compounds called HALOCARBONS (carbon- and halogen-containing compounds). CFCs are halocarbons that contain only the elements carbon, chlorine, and fluorine. The most common CFCs are small molecules containing only one or two carbon atoms.plz mark me as brai LIST and thank my answer plz

47944.

How does the process of convection take place in nature? Explain with suitable example​

Answer» TURE EXPLANATION:nxbjxjxnxb jaomzb jxlsngdkskshjdksndb
47945.

What is the frictional force of a round object with mass M and radius R which rolls down the inclined plane without slipping along the way​

Answer»

i don't KNOW what to do with it H a LITTLE m in the WORLD of the world and one to b

47946.

The reaction in which an acid reacts with base /alkali to produce salt and water is called _______________ reaction​

Answer»

The reaction of an acid with a base is called a NEUTRALIZATION reaction. The PRODUCTS of this reaction are a salt and water.hope it will HELP you please mark me as BRAINLIEST and follow me

47947.

With the increase in interparticle space,. Single choice. (1 Point)interparticle attraction increases and kinetic energy of the particle decreasesinterparticle attraction decreases and kinetic energy of the particle increasesinterparticle attraction and kinetic energy of the particle decreasesinterparticle attraction and kinetic energy of the particle increases​

Answer»

article on PRESENTATION and AFRICA ENERGY of the particle INCREASES

47948.

A LAEVISIAccording to 3n-6 rule, the non linear, water molecules has​

Answer» EXPLANATION:no ruleo no ruleo no ruleo no ruleo
47949.

What is mannich rea​

Answer»

The Mannich REACTION is an organic reaction which consists of an AMINO ALKYLATION of an acidic proton placed next to a CARBONYL functional group by formaldehyde and a primary or secondary amine or AMMONIA. ... The Mannich reaction is also considered a condensation reaction.

47950.

Justify the statement lower aliphatic amines are gaseous in nature​

Answer»

a NOUN is a NAME of PLACE PERSON THING and place