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W.K.T molar mass of Cuso4.5H2O = 159.609 + 90 = ~250. Mass of water of crystallization = 5 * 18 = 90. Percentage = 90/250 * 100= 36%.

Actually, it refers to the water that is found in the crystalline framework and includes metal complex or salt. This have been found directly bonded to the metal cation

Sigma bond(σbonds)

1. The covalent bond formed by the overlap of atomic orbitals along the internuclear axis is called sigma bond.

2. The overlapping orbitals are oriented along the internuclear axis.

3. The bond is rotationally symmetrical around the internuclear axis

Pi bond(π bonds)

1. The covalent bond formed by the lateral overlap of two p orbitals which are mutually parallel but oriented perpendicular to the internuclear axis is called a pi bond.

2. The overlapping orbitals are oriented perpendicular to the inter nuclear axis.

3. The bond is not rotationally symmetrical around the internuclear axis.

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22)

23)Diamond and graphite are both giant covalent substances made entirely of carbon atoms. Both have chemical formula , but they do not have a molecular formula.

Molecular structure

Diamond: Giant covalent structure, with each carbon covalently bonded to four other carbon atoms in a tetrahedral arrangement to form a rigid structure.

Graphite: It is also Giant covalent structure, with each carbon covalently bonded to three other carbon atoms in a hexagonal arrangement.

Hardness

Diamond: Extremely hard. Due to rigid, tetrahedral arrangement of carbon atoms.

Graphite: Soft. Layers of hexagonally arranged carbon atoms can slide over one another.

Electrical conductivity

Diamond: Insulator. Mobile electrons are absent. All four valence electrons are used in covalent bonds.

Graphite: Conductor. Three out of four valence electrons are used for covalent bonding with other carbon atoms. Remaining valence electrons can be delocalised across the planes of carbon atoms.

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1)Potassium ferricyanideis thechemical compoundwith the formula K3[Fe(CN)6]. This bright red salt contains theoctahedrallycoordinated[Fe(CN)6]3−ion.It is soluble in water and its solution shows some green-yellowfluorescence. It was discovered in 1822 byLeopold Gmelin,and was initially used in the production of ultramarine dyes..

3)It’stetraamminecopper(II).

Some notes on the name: 1. This is a +2 cation, not a -2 anion as described in the question. Ammonia is a neutral ligand, which means that the copper would also have to have a -2 charge, which isn’t going to happen. Copper(II) though is very common.

4)

I)patasium hexachyano farate(lll)

iv)Triamine cobult(lll)chloride

ii) Hexaaqa manganese(ii) chloride

Mass is the amount of matter possessed by a body.

In other words, mass is inertial potential of a body i.e. the amount inertia a body can possess.

The S.I. unit of mass is newton(N). The newton here does not start with a capital letter because it is considered as a unit and not a name. But remember that its symbol(N) is a capital N.

Additive inverse means sum of additive inverse and number itself should be 0 i ) -2/8 ii) 5/9 iii) -6/5

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(i) At room temperature, water has no shape but has a fixed volume i.e., it occupies the shape of the container in which it is kept.

(ii) At room temperature, water flows easily

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.

Crystallization is the process of obtaining pure and large sized crystals from its solution.

crystallization answer

crystallization is the process of obtaining pure

crystallizationis answer of this question

crystallization.............

The process is known as crystallization

crystallization is that process which obtained larged sized crystals

crystallization is the process of obtaining pure and large sized crystals from its solution

crystallization is the process of obtaining pure and large sized crystats from its solutions

the correct answer is crystallization

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Consider capacity of each balloon =n1 moles Total moles of gas =n2 molesFrom PV=nRT (R=0.0821LatmK-1mol-1)n1=0.162 molesAnd n2 = 3.25 moles.therefore 20 balloons can be filled

(c) is the correct answer because the value of m =-3 is not possible when l=2

option (c) is the right answer

In the following sets of quantum numbers, the set which is an impossible arrangement is option (C). Because for l=2 m should lie between -2 to 2.

option C is the correct answer

this question is wrong because never m=-1/2 is not possible

option C is the correct answer

For the 4p orbital, n = 4 and l = 1, therefore (n + l) = 5. As a p subshell has three orbitals and each orbital can hold a maximum oftwo electrons, therefore the maximum number of electrons that would be present in the 4p orbital would be 6.

The emissionspectrumof atomichydrogenhas been divided into a number ofspectral series, with wavelengths given by the Rydberg formula. ... Thespectral seriesare important in astronomical spectroscopy for detecting the presence ofhydrogenand calculating red shifts.

Energy = -13.6 * (Z^2/n^2)

Therefore =-13.6 *(1^2/2^2)=-13.6/4=-3.4 eV

(c)

option c is the correct answer to this question.

option c is the correct answer to this question.

Option d) both intensity and number of lines in Lyman series increase

Since the line in hydrogen spectrum lies within visible region that is at red end, therefore it is corresponds to the Balmer series.The line at the red end suggests thatThe first line of Balmer series is n = 3 to n =2The second line of Balmerseries is n = 4 to n = 2The third line of Balmer series is n = 5 to n = 2

Thus answer is (1)5→ 2

option 1

This is the lowest energy state possible for emission of spectral lines. Hence , no emission takes place whenhydrogen atom is excited by giving 8.4eV.

For Balmer series,_v = R[ 1/(n1)^2 - 1/(n2)^2 ]

Balmer series For second Line( n1=2) (n2 = 4).n1=2 ; n2=4_v = R[ 1/(2)^2 - 1/(4)^2]

_v=1.09×10^7[3/16]

_v = 2.04×10^-6

14 stands for total number of protons and neutrons that is mass numberand 7 for number of protons that is the atomic number

c) is the correct answer

Exothermic reactions release heat or energy. When you breathe out, you must have noticed that your breath is warmer. It means heat has been released from your body. Hence, respiration is an exothermic reaction. Also, in respiration, you take in oxygen and release carbon dioxide. It is similar to candle burning. It takes oxygen or air to burn and gives light and heat.

Respirationis considered asexothermic reactionbecause energy is released in thisprocess. Glucose combines with oxygen present in our cells to form carbon dioxide and water along with energy.Respirationis considered asexothermic reactionbecause energy is produced during thisprocess

Nascent oxygen is a strong oxidizing agent, similar to bleach, which is sodium hypochlorite (the hypochlorite anion contains oxygen+chlorine).

Nascent oxygen will react with large colored or dye molecules. Most such molecules have a large carbon chain or “chromophore” (e.g. beta-carotene). The length of this chromophore determines the color of the molecule. Nascent oxygen will oxidize the molecule and break up this chain into smaller molecules, so it can no longer absorb visible light.

1. a.speedb. accelerationc. non uniform and uniformd. 72e. zero2. scalar- a, c, evector-b, d, f

sorry, 1.b. is displacement

Therefore , Option (c) is correct.

Theadvantages of wind energyare more apparent than thedisadvantages. The mainadvantagesinclude an unlimited, free,renewableresource (thewinditself), economic value, maintenance cost, and placement ofwindharvesting facilities.Limitations of Wind energy:

No electricity when there is any wind

The limitation of wind power is that no electricity is produced when the wind is not blowing. Thus, it cannot be used as a dependable source of base load power. Utilities and merchant generators will not invest huge sums of money into a technology that does not work when the wind is not blowing. Americans want the lights on when they flip the switch, no questions asked. Wind power will probably increase its market share when we develop a 'smart grid' that can handle multiple distributed generation input sources of electrical power.

Wind Turbines Killing Migrating Birds

It has been estimated that about 45,000 birds (golden eagles, kestrels and red-tailed hawks) have been killed over the past twenty years by the whirling blades of wind turbines. The rows of spinning blades at Altamont Pass, east of San Francisco, turn wind into electricity, but they are killing many predatory birds whose annual migration route includes the pass. Past attempts to reduce bird kills have included painting the tips of turbine blades to try to make them more visible to birds and installing screens around generators. These measures have failed to substantially lower the number of bird deaths.

Bat kills are the latest big problem for wind farmers. Researcher's estimate that 1,500 to 4,000 bats were killed at the Mountaineer Wind Energy Center in Western Maryland in 2004. This is raising concerns about an expansion of wind turbine use at Backbon Mountain in Maryland, where Clipper Wind power, Inc.of California is planning to build a project 20 miles away from the Mountaineer site.

Solutions of limitations:

We should build wind turbines where there is too much of wind like near sea so there will be 24 hours electricity and the problem of electricity will be solved and there are less birds near sea so the problem of killing birds will also be solved.

When we keep the balloon in sun, the gas molecules gain kinetic energy because of the heat generated by the sun rays. Thus, the fast-moving gas molecules exert pressure on the walls of the balloon and it expands. In a certain duration of time, the balloon reaches the limiting volume which it can attain and further expansion leads to bursting of the balloon.

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Given x-y = 26....(1)x = 3y......(2)

Put value of x from (2) to (1)3y - y = 262y = 26y = 13

x = 3y = 3*13 = 39Value of x = 39, y = 13

Archimedes’ principle, physical law ofbuoyancy, discovered by the ancient Greek mathematician and inventorArchimedes, stating that any body completely or partially submerged in afluid(gasorliquid) at rest is acted upon by an upward, or buoyant,forcethe magnitude of which is equal to the weight of the fluid displaced by the body. The volume of displaced fluid is equivalent to the volume of an object fully immersed in a fluid or to that fraction of the volume below the surface for an object partially submerged in a liquid. The weight of the displaced portion of the fluid is equivalent to the magnitude of the buoyant force. The buoyant force on a body floating in a liquid or gas is also equivalent inmagnitude to the weight of the floating object and is opposite in direction; the object neither rises nor sinks. For example, a ship that is launched sinks into the ocean until the weight of the water it displaces is just equal to its own weight. As the ship is loaded, it sinks deeper, displacing more water, and so the magnitude of the buoyant force continuously matches the weight of the ship and its cargo.

here staggered has lowest PE

staggered form has lowest potential energy.

your answer is not wrong

Normally when pressure is increased, increasing the pressure when a system is in equilibrium between liquid and solid phases will increase the phase transition temperature. so, it tries to remain in solid form.

but for water , it is opposite . the transition temperature decreases as , water expands on on cooling. so , here it will go to liquid phase. when pressure is increased

answer is option A.

The simple answer is that ice is less dense than water.

The question then becomes: Why is ice, which is water in solid form, lighter than water in its liquid form? Something must be happening to water when it freezes.

One molecule of water has two hydrogen atoms and one oxygen atom, or H2O. The hydrogen atom is slightly positive, and the oxygen atom is slightly negative. At room temperature, these water molecules are loosely linked and free to move around easily, which is what defines the liquid state of matter.

Once the temperature hits 32°F, or 0°C, the molecules line up in a rigid six-sided honeycomb structure, with water molecules—the more positively charged hydrogen attracting the more positively charged hydrogen—linking up with each other in a process called hydrogen bonding.

This causes the molecules to move more slowly and take up more space. You have ice. Because the same weight or mass now takes up more space, it is less dense and floats on water.

We can put salt on ice to melt it. Salt is sodium chloride, or NaCl. (Technically, most salt for sidewalks is potassium chloride, or KCl, but the chemical process works the same way.) The sodium atom in a salt molecule has a slight positive charge, and the chloride atom has a tiny negative charge.

A water molecule has one atom of oxygen bound to two atoms of hydrogen. The hydrogen atoms are attached to one side of the oxygen atom, resulting in a water molecule having a positive charge on the side where the hydrogen atoms are and a negative charge on the other side, where the oxygen atom is.

The sodium chloride ions pull and tug on the water’s two hydrogen atoms (unlike charges attract) and tear the bonds apart. The ice no longer has a honeycomb structure. It has melted. In order for the melted ice to freeze again, it has to go much lower than 32°F; the salt has lowered the freezing point of the water.

Most of Earth’s ice is packed into huge sheets called glaciers. The largest glacier covers most of the Antarctic continent and holds about 90 percent of the world’s ice. If all of it were to melt, the oceans would rise 187 feet.

You might want try this science experiment. Fill a drinking glass with water, and then put an ice cube in the water. You can see that the ice cube floats. Now, using isopropyl rubbing alcohol that you can buy in any drugstore, fill a glass with alcohol and carefully drop in an ice cube.

What happens to the ice cube? Alcohol is less dense than water, less even, than frozen water, so, since the ice cube is denser than the alcohol in the glass, it sinks.

Ice floats on water because density of ice is less than water. In common language we can say ice floats on water because it is lighter than water.

Tq

3-Amino-4-chloro-penta-2-ol

The correct answer is

3-amine,4-chloro,2-methyl pent-2-ene carboxylic acid.

the answer is 4

C2H5 will release ab another product

c) is the correct answer

option D is correct answer

It forms whenironand oxygen react inwateror in moisture in theair. The reaction ofironand chloride underwater is also referred to asrust. Certain factorsspeedup therustingprocess, such as salt in thewater.

Ions are highly charged species that can readilyconductanelectricalcurrent. Sohydrochloricacid, since it exists as ions in water, readilyconducts electricity. Buthydrogen chloridethe gas does not exist as ions since there is no solvent medium for them to dissolve into.