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ong>Explanation:

The molecular weight of oxygen is 32 g/mol.

HENCE, one mole of oxygen weighs 32 g.

One mole of oxygen contains 6.023×10

23

molecules.

The mass of one MOLECULE of oxygen is:

6.023×10

23

32

=5.31×10

−23

g.

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ong>Answer:

The polarity of the carbonyl group notably AFFECTS the physical properties of melting point and boiling point, solubility, and dipole moment. ... ALDEHYDES with fewer than about five carbon atoms are soluble in water; however, above this number, the hydrocarbon portion of their MOLECULES makes them insoluble.

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ong>Answer:

Coal formed millions of years ago when the earth was covered with huge SWAMPY forests where PLANTS - giant ferns, reeds and mosses - grew. ... HEAT and pressure produced chemical and physical changes in the plant layers which forced out oxygen and left rich carbon DEPOSITS.

ong>Answer:

SODIUM's SYMBOL has been given NA because it is its latin word for natrium ....

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EXPLANATION:

ong>ANSWER:

FALSE

Explanation:

and the ANS is false

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ong>Answer:

CaCO3(s)+H2SO4(aq)→CaSO4(s)↓+CO2(g)↑+H2O(l)CaCO3(s)+H2SO4(aq)→CaSO4(s)↓+CO2(g)↑+H2O(l)

We knows that with respect to calcium carbonate we gots a molar quantity of….

25∙g100.09∙g∙mol−1=0.250∙mol25•g100.09•g•mol−1=0.250•mol.

For stoichiometric EQUIVALENCE THE SAME molar quantity with respect to sulfuric ACID, i.e. 0.250∙mol0.250•mol…i.e. a little bit less than 25∙g25•g. And so if we got 60% w/w sulfuric acid, we REQUIRE 25∙g0.60=42∙g25•g0.60=42•g of the acid solution…

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ong>ANSWER:

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anesthetic

EXPLANATION:

It is used in hospitals to MAKE the patient unconscious during surgery and makes people fall ASLEEP.

1×10^-8

Explanation:

HA = H+ + A-

0.01M

K =( 1×10^-5)^2/ 0.01 = 1×10^-8

ong>Explanation:

An acid–BASE titration is a method of quantitative analysis for DETERMINING the concentration of an acid or base by exactly neutralizing it with a STANDARD solution of base or acid having known concentration. A PH indicator is used to monitor the PROGRESS of the acid–base reaction.

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ong>Answer:

4 ADDED 5 times a numbereqs 2 subtract 7 TIME the NUMBER. find the number.

Generally, a gas behaves more like an ideal gas at higher TEMPERATURE and lower pressure, as the potential ENERGY due to intermolecular forces becomes LESS significant compared with the particles' kinetic energy, and the size of the MOLECULES becomes less significant compared to the empty space between them.

Explanation:

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0.224 L or 224 ML of the CO₂ at S.T.P. will be produced in the Reaction.

Explanation:

ong>Answer:

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Explanation:

the MASS of an ELECTRON is 9.1x10^-31 kg. if

its kinetic energy is 3*10^-28 J.

ong>ANSWER:

All chemicals and compounds undergo CHEMICAL REACTIONS

EXPLANATION:

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ong>Answer:

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Explanation:

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ong>Answer:

4 added 5 times a numbereqs 2 SUBTRACT 7 TIME the NUMBER. find the number.

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Explanation:

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ong>Answer:

A symbol is the short form which stands for the atom of a specific element or the abbreviations used for the NAMES of elements. It represents a specific element. It represents one atom of an element. A symbol represents how MANY atoms are present in its one GRAM (gm) atom.

Explanation:

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ong>Answer:

In Flame PHOTOMETRY, the Flame Photometer is used to simultaneously DETECT and display five ions (K, Na, LI, Ca, and Ba) and to accurately determine the concentration of each within a given SUBSTANCE.

ong>ANSWER

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ong>EXPLANATION:

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ong>ANSWER:

Principle of superposition

This method is called the principle of superposition. The PRINCIPAL of superposition relies on Coulomb's statement 'like charges repel each other and unlike charges attract each other” and can be USED to find the force on any charge in a system of MULTIPLE charges.

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the QUESTION answer is the 152

ong>Answer:

A) NEUTRAL FECL3

Explanation:

This is known as ferric CHLORIDE test, used in identification of the organic compound GIVEN. In this test Hydrochloric acid will be formed along with a PURPLE coloured solution.

Given:-

→Mass of ETHYL alcohol (solute) = 46g

→Mass of water (SOLVENT) = 18g

To FIND:-

→Mole fraction of ethyl alcohol

Solution:-

•Chemical formula of ethyl

alcohol = C₂H₅OH

•Chemical formula of water = H₂O

Molar mass of ethyl alcohol :-

= 12×2+1×5+16+1

= 24+5+17

= 46g

Molar mass of water :-

= 1×2+16

= 18g

Number of MOLES in 46g of ethyl alcohol:-

= Given Mass/Molar mass

= 46/46

= 1 mole

Number of moles in 18G of water:-

= 18/18

= 1 mole

Mole fraction:-

= Moles of solute/Total moles in

solution

= 1+/(1+1)

= 1/2

= 0.5

Thus, the mole fraction of ethyl alcohol is 0.5.

rong>ANSWER:

pH = P[H] + 0.04.

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Explanation:

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ong>Answer:

• Rate of reaction should be indicated by symbols
• We should indicate PHYSICAL states by symbols
• Reversible reaction should be indicated by USING double arrows

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ong>Answer:

neutral FECL3 because it is phenolic compound .ACCORDING to its characteristic. concept CLEAR kro betq FIR objectives solve kro.

ong>ANSWER:

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