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5) Alpha and Beta particles are actually physical particles of matter. The Alpha is two protons and two neutrons, and consequently is relatively very heavy and slow and carries a double positive charge.. A Beta is simply an electron and has a negative charge. The Beta may be moving from very slow to very fast, and the speed is an indication of it's "energy level". Gamma Radiation is a true electromagnetic energy, and moves at or near the speed of light

4)order to write the Na electron configuration we first need to know the number of electrons for the Na atom (there are 11 electrons). When we write the configuration we'll put all 11 electrons in orbitals around the nucleus of the Sodium atom.

In writing the electron configuration for sodium the first two electrons will go in the 1s orbital. Since 1s can only hold two electrons the next 2 electrons for sodium go in the 2s orbital. The nex six electrons will go in the 2p orbital. The p orbital can hold up to six electrons. We'll put six in the 2p orbital and then put the remaining electron in the 3s. Therefore the sodium electron configuration will be 1s22s22p63s1

Canal rays are the anode rays. these are positively charged ions and protons. these are discovered by Goldstein.

The beam of rays which travel in a direction away from anode towards cathode when a gas taken in a discharge tube is subjected to the action of high voltage underlowpressure are known as canal rays. It is also called anode rays. It was discovered by E. Goldstein in 1886.

(b) Electrons

cathode rays were composed of a previously unknown negatively charged particle, which was later named the electron.

. Stacking Sequence of Layers-HCP layers cycle between two equivalent shifted layers in an ABABAB sequence-CCP layers cycle among three different layers in an ABCABC sequenceSimilarities and Difference Between the FCC and HCP Structure2. Shape of the Unit Cells- HCP structures have hexagonal unit cells characterized by a diamond shaped or hexagonal base with sides of equal length-CCP structures have cubic unit cellsHexagonal Unit Cell3. Volume of Unit Cells-HCP unit cells have a volume which can be calculated with the equation V=24*sqrt(2)*r^3 in which r = the atomic radius-CCP unit cells have a volume which can be calculated with the equation V=8*sqrt(8)*r^3 in which r = the atomic radiusHexagonal Close Packing4. Number of Atoms per Unit Cell-HCP unit cells contain 6 atoms-CCP unit cells contain 4 atoms

it has no empty d orbital hence it cant form dπ-dπ bondsthus it cannot form NF5

Magnesiumribbonmustbe cleaned before burning in airso that the layer ofmagnesiumoxide (which is formed due to reaction ofmagnesium withair) can be removed in order to get the desired chemical reaction.

( x-3)^3=( x^3+27-3x^2(3)-3x(9))+5=( x^3-9 x^2-27x+27+5)=( x^3-9x^2-27x+32)

I have given you the answer now you have to find the value of x

As NH3 has higher a value, it can be easily liquifiable. Such that [rate of liquification is directly proportional to a value]

Na2CO3 + HCl = NaHCO3 + NaCl

Methyl-orange will change for the second protonation:

NaHCO3 + HCl = H2CO3 + NaClH2CO3 = H2O + CO2

Either titration will tell you the amount of Na2CO3 you have.

Combining both indicators is possible but since Methyl-orange is yellow on the basic side, it may obscure the transition of the phenophthalein (purple to colorless). If you were to use both, it would be best to add the methyl orange indicator after the first equivalence point when the phenophthalein has gone colorless. You would also have to remember to divide the concentration you get using two equivalents of acid by 2 to get the concentration of Na2CO3.

98% by weight means 98 gm H2SO4 in 100 gm solution or 98 g H2SO4 in 2 g water.Number of moles of H2SO4 = 98/98 = 1Density = 1.8 g/LVolume of solution = Mass of solution/ Density = 100/1.8 = 55.55 ml = 0.055 L Applying,M1V1 = M2V218.18 x V1 = 0.1 x1V1 = 0.0055 L = 5.5 ml Hence , volume of acid required = 5.5 ml

Given: Molarity of solution = 2.03 MDensity of solution = 1.017 g mL-1​Molar mass of acetic acid = 60 g mol-1​To find : Molality of solutionSolve:Molality = Number of moles / Mass of solvent in kgWe have the number of moles but we need to find the mass of solvent.As we know molarity is number of moles / Volume of solution (in liters)​Molarity = Number of moles if we have 1 L solution.Number of moles = 2.03 in 1 L or 1000 mL solutionDensity = Mass / VolumeMass = DensityVolumeMass = 1.017​1000= 1017 gMass of solution = 1017 gMass of acetic acid in solution = Number of moles​Molar mass= 2.03​60= 121.8 gMass of solvent = mass of solution - mass of acetic acid= 1017-121.8= 895.2 g or 895.210^-3kgMolality = Number of moles / Mass of solvent (in kg)2.03 / 895.2​10^-3)= 2.27 m

sulphuric acid and Cu is formed

it may reacts and give sulphuric acid and Cu

Solids cannot be compressed because the particles of solid are very closely packed and hence no space is left for the compression. Therefore the correct option is (a)

option (a) is the following question answer.

answer is a please like me as the best

Ans :- A chemical substance is a form of matter having constant chemical composition and characteristic properties.

It cannot be separated into components by physical separation methods, i.e., without breaking chemical bonds. Chemical substances can be simple substances, chemical compounds, or alloys.

Thank Pratap

Thank you Chiu

i) evaporation because ink is a mixture of Dye in wateriii) mixture

this is by separation technique

1.evaporation 2.salt in water or sugar in water3. mixture because when we do the paper chromatography to ink then we can see various substances in it so it is a mixture

(i) vaporisation (ii) salt and water (iii) mixture

evaporation this method is used to separate the oil component solvent from its non volatile solute or where one of the component in the water example equal to separation of coloured component from blue black ink

i) evaporation because ink is a mixture of Dye in wateriii) mixture

Pure and concentrated Acetic acid is called as Glacial Acetic Acid . Below 16.7 degree Celsius it turns into a colorless crystalline solid. I think because of crystallization property of this compound at the said temperature it may have got the name prefix Glacial. You might have seen the glacial mountains which are covered by snow ( water is precipitated as snow). On this context it may has got this name.

The option is (c)

The colligative properties are properties of dilute solutions of non volatile solutes whose value depend on concentration of solute particles in the solution. Naphthalene is a non-volatile solid, hence in addition in benzene decrease its vapour pressure.

Calculate the volume of 85.0% phosphoric acid needed.

volume of impure phosphoric acid = M pure × V pure × gram formula weight / (percent purity x density) = (1.0 M × 0.500 L x 98.00 g/mol) ÷ 1.685 g/mL0.850

= 34 mLSlowly add 34 mL of 85.0% phosphoric acid to a 500-mL volumetric flask half-filled with distilled or deionized water and swirl the flask to mix. Once the solution is at room temperature, dilute to the mark with water and invert the flask several times to mix.

The range from 0 to 14 gives a measurement of comparativestrengthof acid and base solutions. Pure water and other neutral solutions have apH valueof 7. ApH valueless than 7 indicates that the solution is acidic, and a pH valuegreater than 7 indicates that the solution is basic.

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The range from 0 to 14 gives a measurement of comparativestrengthof acid and base solutions. Pure water and other neutral solutions have apH valueof 7. ApH valueless than 7 indicates that the solution is acidic, and apH valuegreater than 7 indicates that the solution is basic.

Hydrogen sulphide gas cannot be dried using sulphuric acid as H2S gas is oxidisedby sulphuric acid to Sulphur.

Therefore, the H2S gas has chemical action with acid and hence it reacts with it , therefore, cannot be dried using it.

(B) Cl2

Explanation:Chlorine gas has a yellowish colour. All other gases in the option are colourless.

However, it is also degenerate due to the double bond so that an attack is not favoured. Thus, thecarbon monoxidemolecule is one that won't react with water at all and totally defies the concept of acidic/basic oxides

Option- A is the answer

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Thes-blockis one of fourblocksof elementsin the periodic table. The elementofs- group have a common property. The electron in their most outward electron shell are in thes-orbital.Elementsin thes- are in the first two periodic table groups. Theelementsin group one are called the alkali metals.

. Within the periodic table, thes-blockis located to the far left and includes all of the elements in the first two columns (columns 1 and 2) plus helium, which is located in the top right corner in column 8A (column 18 on some versions of the periodic table). In the periodic table below, the s-block is colored pink.

The s-block elements are the 14 elements contained within these columns. All of the s-block elements are unified by the fact that their valence electrons (outermost electrons) are in ansorbital. Thesorbital is spherical and can be occupied by a maximum of two electrons. Elements in column 1 have one electron in thesorbital, and elements in column 2 (plus helium) have two electrons in thesorbital.

The s-block elements include hydrogen (H), helium (He), lithium (Li), beryllium (Be), sodium (Na), magnesium (Mg), potassium (K), calcium (Ca), rubidium (Rb), strontium (Sr), cesium (Cs), barium (Ba), francium (Fr) and radium (Ra). The periodic table shows exactly where these elements are within the s-block.

No light can not be caregorised as matter. Light do not have mass & do not ccupy space.This, it cannot be considered as matter.

Light cannot be classified as matter because it has no mass and it do not occupy space

no because light do not have mass and do not occupy space

Here the correct answer is option (A) volume .

a~volume is the correct answer

volume is the right ans

A graduated cylinder is used to measure Volume

option (A) is a correct answer

Nucleotides are the subunit that is polymerized (connected into a long chain) to make nucleic acids (DNA and RNA).

Nucleotides consist of three smaller components: a ribose sugar, a nitrogenous base, and phosphate group(s). Ribose is the sugar component of nucleotides.

(b) 4° C

Explanation:Hope's apparatus is used for verifying experimentally the unique property of water that it has maximum density at 4 degree Celsius.

Average kinetic energy ∝ Temperature in Kelvin;

(KE40) / (KE20) = (3/2 nR * 313)/(3/2 nR*293);

KE40 / KE20 = T2/T1 = 40 + 273 / 20 + 273 = 313/293

313/293

A unit of mass for expressing masses of atoms, molecules, or nuclear particles equal to ¹/₁₂ the mass of a single atom of the most abundant carbon isotope12C

E° = (0.059/n)log(Kc)

here n = no. of electrons exchanged , so n = 2

and E° is 0.36v

now, 0.36 = (0.059/2)log(Kc)=> log(Kc) = 0.36*2/0.059 = 12.20

so, Kc = 10^(12+0.2) = 10^0.2 × 10¹² = 1.58×10¹²

molar mass of Mn = 54 now %Mn = 64% = 0.64suppose x atoms O are there.. so mass will be (x)*16 = 16x now total mass of Mn(O)x = 54+16x and for % the equation is 54/54+16x = 0.64 => 54 = 0.64*54 +0.64*16x => 54(1-0.64) = 10.24x or x = 54*0.36/10.24 = 1.89 option D.

because red colour have highest wavelength in compare of blue colour

The gas liberated when hydrochloric acid reacts with a metal is hydrogen gas. .We can confirm the presence of hydrogen gas by bringing a burning splinter near the test tube. ...If the gas released is indeed hydrogen, then the splinter will extinguish with a pop sound.

particles of matter are:1) very very small 2) continuously moving 3) have spaces between them 4) have force of attraction between them

boiling 1) it takes place in at fixed temperature known as boiling point. 2) it is surface as well as bottom phenomena. 3) no cooling is caused. evaporation 1) it takes place at any temperature below the boiling point. 2)it us a surface phenomena 3 ) cooling is caused during evaporation.

Water pollutionis caused due to severalreasons. ... Sewage And WasteWater: Sewage, garbage and liquid waste of households, agricultural lands and factories are discharged into lakes andrivers. These wastes contain harmful chemicals and toxins which make thewaterpoisonous for aquatic animals and plants.

please post a clear picture.