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Ncert BOOK MAI dekh lo utna kafi RAHEGA acche MARKS bhi aayenge.

as well SOAK acid free art paper or a kitchen sponge towel (kitchen paper towel) with the juice and let it dry to make "LITMUS paper". Note that most paper towel paper is ACIDIC and you will therefore GET red litmus paper even if you start to make the paper from a neutral elderberry juice solution.

HydrogenHydrogen, being the lightest existing gas (7% the density of AIR), SEEMS to be the most appropriate gas for lifting. It can be easily produced in large quantities, for example with the water-gas shift reaction, but HYDROGEN has several disadvantages: Hydrogen is EXTREMELY FLAMMABLE.

3+IO3^-1+4OH^-1=2CrO3^-2+I^-1+5H2O1 0

》》Explain the BLEACHING action of chlorineExplanation:➪Chlorine bleaches by the process of oxidation. It needs moisture for its bleaching action.Chlorine reacts with WATER to form hydrochloric and hypochlorous ACIDS. Cl2 + H2O ——→ HCl + HClO. Hypochlorous acid is unstable, and it EASILY DISSOCIATES to form nascent oxygen

ANSWER :)The mass of calcium in this compound is equal to 40.1 grams because there's one atom of calcium PRESENT and calcium has an atomic mass of 40.1 amu. The MOLAR mass of the compound is 100.1 grams. Using the handy equation above, we get:The mass of calcium in this compound is equal to 40.1 grams because there's one atom of calcium present and calcium has an atomic mass of 40.1 amu. The molar mass of the compound is 100.1 grams. Using the handy equation above, we get:Mass percent = 40.1 G Ca⁄100.1 g CaCO3 × 100% = 40.1% CATHE mass of calcium in this compound is equal to 40.1 grams because there's one atom of calcium present and calcium has an atomic mass of 40.1 amu. The molar mass of the compound is 100.1 grams. Using the handy equation above, we get:Mass percent = 40.1 g Ca⁄100.1 g CaCO3 × 100% = 40.1% CaOur result means that 40.1% of the mass in the calcium carbonate supplement is CAUSED by calcium. To find the total mass of calcium in the supplement, we find 40.1% of one gram to get a final answer of 0.401 grams of calcium.

are you in class 11th?? EXPLANATION:The elements in group 1 are CALLED the ALKALI METALS. Group 1 is on the left-hand side of the periodic table The alkali metals share similar physical and chemical properties.

I am SORRY I will HELP you NEXT timeExplanation:please MARK me brainlist

tion:A common EXAMPLE of a NONELECTROLYTE is glucose, or C6H12O6. Glucose (sugar) readily dissolves in WATER, but because it does not dissociate into ions in solution, it is considered a nonelectrolyte; solutions containing glucose do not, therefore, CONDUCT ELECTRICITY.

vocalty is a MOVING with 100-gm -to- 30'

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1 mole of gas occupies 22.4 litre volume at standard temperature and PRESSURE conditions, which are 1 atm and 273K RESPECTIVELY. HENCE, we can conclude that 22.4 litre is EQUAL to 1 mole and it contains 6.022*10^23 MOLECULES. So, 4.48 litre will contain 1.29*10^23 molecules

0.209Explanation:10 RAISED to 3 means the last digits MAY CONTAIN 3 digitsHope it will HELP you

The mass of CHLORINE in metal chloride is GIVEN= 49.5%Therefore the mass of metal= (100-49.5) = 50.5The equalent mass of metal is given by the formula:According to dulong pettits LAW:atomic mass of metal= Hence, 3.1g is the answer.The mass of chlorine in metal chloride is given= 49.5% therefore the mass of metal= (100-49.5) = 50.5The EQUIVALENT mass of metal is given by the formula:

and CHLOROFLUOROCARBONS are two hydrocarbons that can drastically alter the atmosphere. Methane oxidizes into carbon dioxide (CO2), increasing the amount of CO2 in the atmosphere and ADDING to the GREENHOUSE effect and global warming. CFCs are USED in refrigeration and aerosol cans.

3.2 gmExplanation:By the formula,DENSITY = Mass /VolumeMass of the solution = 1.27 × 2.5 Mass of solution = 3.175 gmsBy RULE of SIGNIFICANT figures,3.175gm ≈ 3.2gm

Heisenberg's uncertainty principle is a key principle in quantum mechanics. Very ROUGHLY, it states that if we know everything about where a particle is located (the uncertainty of position is small), we know nothing about its MOMENTUM (the uncertainty of momentum is large), and vice versaHeisenberg conducted a thought EXPERIMENT as well. He considered trying to measure the position of an electron with a gamma ray MICROSCOPE. The high-energy PHOTON used to illuminate the electron would give it a kick, changing its momentum in an uncertain way.

ғᴜʟʟᴇʀᴇɴᴇ ɪs ᴛʜᴇ ᴍᴏsᴛ ʀᴇᴄᴇɴᴛʟʏ ᴅɪsᴄᴏᴠᴇʀᴇᴅ ᴄʀʏsᴛᴀʟʟɪɴᴇ ᴀʟʟᴏᴛʀᴏᴘɪᴄ ғᴏʀᴍ ᴏғ ᴄᴀʀʙᴏɴ. ᴛʜɪs ᴀʟʟᴏᴛʀᴏᴘɪᴄ ғᴏʀᴍ ᴏғ ᴄᴀʀʙᴏɴ ᴡᴀs ᴅɪsᴄᴏᴠᴇʀᴇᴅ ɪɴ 1985 ʙʏ ᴛʜʀᴇᴇ sᴄɪᴇɴᴛɪsᴛs, ʜ. ᴡ. ᴋʀᴏᴛᴏ, ʀ. ғ. ᴄᴜʀʟ ᴀɴᴅ ʀ. ᴇ. sᴍᴀʟʟᴇʏ. ᴛʜᴇʏ ᴡᴇʀᴇ ᴀᴡᴀʀᴅᴇᴅ ᴛʜᴇ ɴᴏʙᴇʟ ᴘʀɪᴢᴇ ғᴏʀʙᴄʜᴇᴍɪsᴛʀʏ ɪɴ 1996 ғᴏʀ ᴛʜɪs ᴅɪsᴄᴏᴠᴇʀʏ.

It CAUSES AIR POLLUTION

nitrogen familyA pnictogen from Ancient Greek:"to choke" and -GEN, "GENERATOR") is any of the chemical elements in group 15 of the PERIODIC table. This group is ALSO KNOWN as the nitrogen family.

answer is 4th optionExplanation:BEACUSE in 4th OPTION by TWO HALF S orbital make sigma bond which is the strongest bond..

Certain elements combine with other atoms, DONATING, accepting or sharing electrons in different proportions depending on the nature of the reaction. For example, iron combines with oxygen to FORM ferrous OXIDE as well as ferric oxide. This is termed VARIABLE valency. .......

Here is your answer!Explanation:Nathan L. In science, we have a name for this, CALLED AVOGADRO's number, and it describes the number of representative particles in one mole of a substance. The INVERSE mole unit tells US there are 6.022×1023 particles of something *per mole*.PLEASE MARK AS BRAINLIEST!!!

Explanation:Acetic acid (CH₃COOH)The percentage composition of CARBON , hydrogen and oxygen PRESENT in acetic acid.➛ FIRST we have to find the molar mass of acetic acid.     Molar mass of CH₃COOH = 12 + 3 + 12 + 16 + 16 + 1     Molar mass of CH₃COOH = 60 gPercentage of carbon:➛ The percentage composition of carbon is GIVEN by,     Percentage composition of carbon = Molar mass of carbon in the compound/Total molar mass of compund × 100➛ Molar mass of carbon = 12 g➛ Substitute the data,    Percentage composition of carbon = 12 × 2 /60 × 100    Percentage composition of carbon = 24/60 × 100   Percentage composition of carbon = 40 %    Percentage composition of hydrogen:➛ Percentage composition of hydrogen = Molar mass of hydrogen in the compound/Total molar mass of compund × 100➛ Molar mass of hydrogen = 1g➛ Substituting the data,     Percentage composition of hyrogen = 4/60 × 100     Percentage composition of hydrogen = 6.67 %     Percentage composition of oxygen:➛Percentage composition of oxygen = Molar mass of oxygen in the compound/Total molar mass of compund × 100➛ Molar mass of oxygen = 16 g➛ Substituting the data,     Percentage composition of oxygen = 16 × 2/60 × 100     Percentage composition of oxygen = 53.33 %

Ethyl acetate (systematically ethyl ethanoate, commonly abbreviated EtOAc, ETAC or EA) is the organic compound with the formula CH3−COO−CH2−CH3, SIMPLIFIED to C4H8O2. This colorless liquid has a characteristic sweet SMELL (similar to pear drops) and is used in glues, nail polish removers, and in the decaffeination process of tea and coffee. Ethyl acetate is the ester of ethanol and acetic acid; it is MANUFACTURED on a large scale for use as a SOLVENT.[4]

ne, ALSO called buckminsterfullerene, any of a series of HOLLOW carbon molecules that FORM either a closed cage (“buckyballs”) or a cylinder (carbon “nanotubes”).

1-Fluoro-2,4-dinitrobenzene (commonly called Sanger's reagent, dinitrofluorobenzene, DNFB or FDNB) is a chemical that REACTS with the N-terminal AMINO ACID of polypeptides. This can be helpful for sequencing proteins.1-Fluoro-2,4-dinitrobenzene1-Fluoro-2,4-dinitrobenzene.svgDNFB molecule

As sugar solution is a mixture and mixtures has not any specific SET of properties. They show the properties of the individual components from which they are formed. (b) PETROL and water forms a HETEROGENEOUS mixture as its constituents can be seen separately and are not uniformly distributed THROUGHOUT its volume.

ANSWERWhenever an electron in a hydrogen atom jumps from a higher energy level to the lower energy level, the difference in energies of the two levels is emitted as RADIATION of a particular wavelength. It is called a spectral line. As the wavelength of the spectral line depends UPON the two orbits (energy levels) between which the transition of electron takes place, various spectral lines are obtained. The different wavelengths constitute spectral series which are the characteristic of the atoms emitting them. The following are the spectral series of hydrogen atom :(i) Lyman series : When the electron jumps from any of the outer orbits to the first orbit, the spectral lines emitted are in the ultraviolet region of the spectrum and they are said to form a series called Lyman series (figure).Here, n 1 =1, n 2 =2,3,4...The wave number of the Lyman series is GIVEN by,v =R(1− n 22 1 )(ii) Balmer series : When the electron jumps from any of the outer orbits to the second orbit, we get a spectral series called the Balmer series. All the lines of this series in hydrogen have their wavelength in the VISIBLE region. Here n 1 =2, n 2 =3,4,5...The wave number of the Balmer series is,v =R( 2 2 1 − n 22 1 )=R( 41 − n 22 1 )The first line in this series (n 2 =3), is called the H α -line, the second (n 2 =4), the H β -line and so on.(iii) Paschen series : This series consists of all wavelength which are emitted when the electron jumps from outermost orbits to the third orbit. Here n 2 =4,5,6... and n 1 =3. This series is in teh infrared region with the wave number given byv =R( 3 2 1 − n 22 1 )=R( 91 − n 22 1 )(iv) Brackett series : The series obtained by the transition of the electron from n 2 =5,6... to n 1 =4 is called Brackett series. The wavelengths of these lines are in the infrared region. The wave number is,v =R( 4 2 1 − n 22 1 )=R( 161 − n 22 1 )(v) Pfund series : The lines of the series are obtained when the electron jumps from any state n 2 =6,7... to n 1 =5. This series also lies in the infrared region. The wave number is,v =R( 5 2 1 − n 22 1 )=R( 251 − n 22 1 )

1.724×10^6m^-1=181.744

balanced equation is an equation for a chemical reaction in which the NUMBER of atoms for each ELEMENT in the reaction and the total charge are the same for both the REACTANTS and the products. In other words, the mass and the charge are balanced on both sides of the reaction.Aug 20, 2017

it will me equal with density of WATER divided to AREA of FLUID

ғᴜʟʟᴇʀᴇɴᴇ ɪs ᴛʜᴇ ᴍᴏsᴛ ʀᴇᴄᴇɴᴛʟʏ ᴅɪsᴄᴏᴠᴇʀᴇᴅ ᴄʀʏsᴛᴀʟʟɪɴᴇ ᴀʟʟᴏᴛʀᴏᴘɪᴄ ғᴏʀᴍ ᴏғ ᴄᴀʀʙᴏɴ. ᴛʜɪs ᴀʟʟᴏᴛʀᴏᴘɪᴄ ғᴏʀᴍ ᴏғ ᴄᴀʀʙᴏɴ ᴡᴀs ᴅɪsᴄᴏᴠᴇʀᴇᴅ ɪɴ 1985 ʙʏ ᴛʜʀᴇᴇ sᴄɪᴇɴᴛɪsᴛs, ʜ. ᴡ. ᴋʀᴏᴛᴏ, ʀ. ғ. ᴄᴜʀʟ ᴀɴᴅ ʀ. ᴇ. sᴍᴀʟʟᴇʏ. ᴛʜᴇʏ ᴡᴇʀᴇ ᴀᴡᴀʀᴅᴇᴅ ᴛʜᴇ ɴᴏʙᴇʟ ᴘʀɪᴢᴇ ғᴏʀʙᴄʜᴇᴍɪsᴛʀʏ ɪɴ 1996 ғᴏʀ ᴛʜɪs ᴅɪsᴄᴏᴠᴇʀʏ.

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