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yes there are an EXAMPLE of ISOTONE as the they both have 12 NEUTRON each which MEANS they are an example of isotones

Percentage COMPOSITION of an element in a compound is given by

% composition of element

=  Mass of element in compound ÷ Mass of compound×100

we have 1  MOLE of K2Cr2O7

Mass of  1 mole  of compound  = 294.185 g

Mass of  Cr in  1 mole  of compound  = 2 × 52 g = 104 g

% composition of Cr = 104 g ÷(294.185 g  × 100) = 35.35 %

Soap, water, and oil are all made up of MOLECULES. Some molecules are hydrophilic, (hydro=water and philic=loving) these molecules are attracted to water. Some molecules are hydrophobic, (hydro=water and phobic=fearing), they are repelled by water.

Molecules that READILY mix with water are hydrophilic.

Molecules that readily mix with oil are hydrophobic.

Since we all know that water and oil do not mix, then we ALSO know that hydrophilic and hydrophobic compounds do not mix.

Two other words we need to know are POLAR and nonpolar. Nonpolar compounds, LIKE oil and grease, cannot dissolve in water. Polarcompounds can dissolve in water.

 

Most of what we call dirt is grease or oil which will not come off with just water. This is because oil and grease are non-polar, which means they will not dissolve in the water.

Electron Gain ENTHALPY is the energy released when ONE MOLE of electron are added to gaseous atoms of an element. Electron Affinity is the same as Electron Gain Enthalpy but viewed as the energy SUPPLIED to the surroundings rather than that released by the atoms. Hence its SIGN is opposite from the latter.

It consists of MERCURY as a liquid filled in a GLASS tube. On the body of the glass tube, CALIBRATED marks are provided which facilitates the reading of temperature. A bulb is formed at ONE end of the thermometer which contains the largest part of mercury

YES TRUE because a chemical SUBSTANCE cannot REACT on itself  it NEEDS another chemical to react

Discovery of Existence and Chargeof an Electron. A British PHYSICIST NAMED J.J Thompson in the year 1897 PROPOSED that an atomconstitutes of at least one negatively CHARGED particle. Hediscovered ELECTRONS while working on an experiment.

It's a.) sweat
hope it HELPS

Hey frnd....
The charge of an alpha particles is +2E
here 'e' means that the ELECTRON charge
it's VALUE is equal to 1.6021765 × 10−19 coulomb

and here +2e means that it loses 2 electrons to FORM an alpha particles and MAKES itself positively charged.

HOPE THIS HELP YOU ☺☺❤❤❤

Here is ur answer

Take some WATER in a glass vessel or beaker. Heat it slowly on a tripod STAND. Before the water begins to boil, look carefully at the inner SURFACE of the vessel. You will see tiny BUBBLES on the inside. On heating, air dissolved in water escapes in the form of these bubbles.


A) the solution will remain colourless
b) ACETIC acid will dissolve in water
c) UNIVERSAL indicator will turn pale orange
d) the reaction will evolve CO2 gas and H2O + CH3COONa

Please tell of which COMPOUND isomerism you WANT I will GIVE you

The second VALUE is virtually always positive, because at that point you have to CONSIDER the electron REPULSION occurring. ... Due to which the attraction between the added electron and nucleus of oxygen ATOM will effected and increases in case of oxygen hence the negative electron affinity is high.

hope this HELPS you

P1VI= P2V2

P2 = 750*120/180 =500 TORR PRESSURE

ETHENE is FORMED with WATER when ethanol is heated with concentrated H2SO4 at 413K

Most highly charged anions are basically very unstable so, they mostly can't exist in nature, the reason for INSTABILITY is that anions have more electrons and is bigger than its RESPECTIVE atom (the negative charge indicates the amount of extra electrons present in an anion) and effective nuclear charge (force of attraction experienced by a electron due to positively charged nucleus) decreases with increase in size so, nucleus can't HOLD those extra electrons hence, it can't maintain its form.
but in case of highly electronegative anions like Fluorine, chlorine, oxygen etc they can form a highly charged anion but very few bcuz highly charged anions have very high energy and they r mostly very REACTIVE so, they will eventually lose it through radiation or form a more stable compound..
HOPE THIS HELPS
;-)

It's Because The P- isomers being more symmetrical and FITS closely in the crystal lattice and thus has stronger inter-molecular forces of attraction than o- and m- isomers .
As during melting or dissolution , the crystal lattice BREAKS , therefore a large amount of energy is needed to melt or DISSOLVE the p - isomer than the CORRESPONDING o-and m-isomers .

ANSWER :
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Because cations can only donate electrons. And we know that only electrons upto 3 can be donated or accepted as if more than 3 electrons are RELEASED than, there will be sharing of electrons ( like carbons). Hence, there will be no concept of ions as ions are formed when electrons are totally given or accepted not when shared.

Cations have +3 charge because they donate electrons ( electron DONORS ), So a POSITIVE charge is formed with the NUMBER of electrons donated.

The rainwater which is used as the purpose of harvesting is known as rainwater harvesting .

It is important because the water which COMES through rain BECOMES waste without any use but if we use that water it will not be waste .

HOPE it will make U understand.
THANKS .

The PRIMARY source of HYDROGEN Fossil Fuels. It can be derived from petroleum, Coal and NATURAL GAS.

HLW #⃣#⃣➕➕

PCC oxidizes alcohols one rung up the OXIDATION ladder, from primary alcohols to aldehydes and from secondary alcohols to ketones. Unlike chromic acid, PCC will not oxidize aldehydes to carboxylic ACIDS. Similar to or the same as: CrO3CrO3and pyridine (the Collins reagent) will also oxidize primary alcohols to aldehydes. Here are two examples of PCC in action.

If you add one equivalent of PCC to either of these alcohols, you OBTAIN the oxidized version. The byproducts (featured in grey) are CR(IV) as well as pyridinium hydrochloride.

One has to be CAREFUL with the amount of water present in the reaction. If water were present, it can ad to the aldehyde to make the hydrate, which could be further oxidized by a second equivalent of PCC were it present. This is not a concern with ketones, since there is no H directly bonded to C.



Thnxxzx
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๏_๏

☜☆☞♥️♥️

So... what's your QUESTION?

It is EXOTHERMIC REACTION

The material MIGHT not have electrons to TRANSFER for ELECTRICITY CONDUCTION

1.The valence BOND theory is unable to EXPLAIN the magnetic moment data of some of the complexes. 2.The valence bond theory does not explain the colour of transition METAL ions, ABSORPTION spectra and heats of FORMATION etc.

NEUTRALIZATION REACTION is the reaction between a ACID and a base, which RESULTS into the formation of salt and WATER.

⛦Hᴇʀᴇ Is Yoᴜʀ Aɴsᴡᴇʀ⚑
▬▬▬▬▬▬▬▬▬▬▬▬☟

▶To seperate the components of sand, common salt & ammonia chloride by 'Sublimation Process'.

============================⤵

❖ It is the phase transition of a SUBSTANCE DIRECTLY from the solid to the gas phase without PASSING through the intermediate liquid phase.

❖ It is an endothermic process that occurs at temperatures & pressures below a substance's triple point in its phase diagram.

❖ EXAMPLES are:-

♦ Dry Ice
♦ Solid C0²

__________
Thanks...✊

It represents MOLECULAR weight of substance which is taken for dissociation or ASSOCIATION. It is also CONSIDERED as normal molecular weight or calculated molecular weight

❣️Hey Dost ❣️

✍️dimethyl is a colorless GAS

◆Structure -it CONTAINS METHYL ETHER; Dimethyl oxide; Oxybismethane; METHANE, oxybis

_____________________

#Shinchan✌️

❣️Gurnazar

No it is not possible because ATOMIC NUMBER is the number of PROTONS in the NUCLEUS which cannot be a fractional value.

Then elctons PRESENT in it will be 11 because your ATOMIC no. = NUMBER of protons = ELECTRONS

Astatine

Astatine is the HEAVIEST NON METAL .

DENSITY of 6.35 tonne/m^3

ENERGY varies INVERSELY with SQUARE of number of excited state.

So, E2 = E1/4 = 313.8/4=78.45 kcal/mole

Facts on Atom:
1.Atoms are smallest particle which make elements.
2.Atoms are MOSTLY empty.
3.The interior in the nucleus contain positivily charge proton and almost all atoms nuclei contain NEUTRAL charged neutron.

Facts on Molecule:
1. Molecules are neutral GROUP of TWO or more atoms.
2.Molecule MAY be homonuclear.

Thank you.....

1. WRITE the atomic number of the element.
2.If atomic number is EVEN then multiply it by 2, you will GET the atomic mass.
3. If the atomic number is odd then multiply it by 2 and ADD 1 to it, you will get the atomic mass of the compound.


Hope it helps you.

"As PER the formula where T is temperature and P is Pressure

PV = nRT

PV = m/M RT

PM = m/V RT

PM = dRT

Here,

(1) PV = d R 300

(2) PV = 0.75 d RT

From (1) and (2)

1 = 300/0.75T

T = 400 K

Hence, C is the RIGHT option for the PROBLEM.

"

Van 't Hoff equation. The van 't Hoff equation relates the CHANGE in the EQUILIBRIUM constant, Keq, of a chemical reaction to the change in TEMPERATURE, T, given the standard ENTHALPY change, ΔH⊖, for the process.