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ong>Answer:

Significant FIGURES are the number of digits in a value, often a measurement, that contribute to the DEGREE of accuracy of the value. We start COUNTING significant figures at the first non-zero digit. Calculate the number of significant figures for an assortment of numbers.

Explanation:

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ong>Answer:

n calculus, the differential represents the PRINCIPAL part of the change in a function y = f(x) with respect to changes in the independent VARIABLE. The differential dy is defined by. where is the derivative of f with respect to x, and DX is an additional REAL variable (so that dy is a function of x and dx).

Explanation:

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ong>Answer:STRONG>

Covalent bond is a primary chemical bond formed by the sharing of electron PAIRS. Covalent bonds are strong bonds with greater bond energy.

Hydrogen bond is a weak electrostatic attraction between the hydrogen and an electronegative atom DUE to their difference in electronegativity.

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ong>ANSWER:

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I will teach you WHATEVER you want

Explanation:

ong>ANSWER:

accha GROUP electro less atomic sije less for atomic INCREASE IONIC kam for nuclear jyada

Mixture COMPRISES two or three COMPOUNDS that aren't fused chemically. They have no physical interactions. A solution contains two SUBSTANCES that are chemically mixed to form a new compound.

ong>EXPLANATION:

To convert (b) Phenol to Cyclohexane:

Phenol is treated with HYDROGEN GAS in presence of Palladium to give CYCLOHEXANONE. This intermediate product is further treated with hydrazine in presence of HYDROXIDE ions to give Cyclohexane. And the Phenol can be converted into Cyclohexane.

C6H12O6

Explanation:

since HYDROGEN and carbon are together in a compound it is considered organic

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A) FE 2+(z=26) is your answer

your ANSWER
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ong>Answer:

Direct conversion of a carboxylic acid to an amide by reaction with ... TAKING acetamide (ETHANAMIDE) as a TYPICAL amide.

jai hind

please FOLLOW m

They ALSO have 1 atomic no in the nucleus

ong>Answer:

This atomic model failed to explain stability of atoms. According to the model, electrons revolve AROUND the positively charged nucleus. It's not possible for a long run as we know atoms are STABLE while any particle in a circular orbit WOULD undergo acceleration.

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ong>Explanation:

Methionine is then converted to s-adenosylmethionine, the DNMT cofactor and the universal METHYL donor for all the BIOLOGICAL METHYLATION process INSIDE mammalian cells including DNA methylation [2,50,51]

Le Chatelier's principle (ALSO known as "Chatelier's principle" or "The Equilibrium Law") states that when a system experiences a DISTURBANCE (such as concentration, temperature, or PRESSURE changes), it will respond to restore a new equilibrium STATE.

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ong>Answer:

The water-soluble vitamins INCLUDE ASCORBIC acid (vitamin C), THIAMIN, riboflavin, niacin, vitamin B6 (pyridoxine, pyridoxal, and PYRIDOXAMINE), folacin, vitamin B12, biotin, and pantothenic acid.

ong>Answer:

HOPE this HELPFUL to u

Explanation:

D AVRAGE

ong>Answer:

A chemical bond is a lasting attraction between atoms, ions or molecules that enables the FORMATION of chemical compounds. The bond may result from the electrostatic force of attraction between oppositely CHARGED ions as in ionic bonds or through the sharing of ELECTRONS as in covalent bond

Explanation:

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er:-

X is CARBON dioxide gas. 

Ca(OH)2(s)+CO2(g)→CaCO3(s)+H2O(L)

Calcium Carbonate is FORMED

ong>Answer:

A common NITRATE TEST, known as the brown ring test can be performed by adding iron(II) sulfate to a solution of a nitrate, then slowly adding concentrated SULFURIC acid such that the acid forms a layer below the aqueous solution... This test is sensitive up to 2.5 micrograms and a concentration of 1 in 25,000 parts.

ong>Answer:

Reduction Of Aldehydes And Ketones With NaBH

For our purposes, SODIUM borohydride is really useful for one thing: it will reduce aldehydes and ketones. In this SENSE it TRAVERSES one rung on the oxidation ladder. ... This is what HELPS us classify the reaction as a reduction. Note that we also form an O-H BOND.

i don't KNOW I don't know I don't know I don't know I don't know I don't know I don't know

ong>Answer:

By definition, the oxidation number of an ATOM is the charge that an atom would have if the COMPOUND was composed of ions. As, the total charge on any compound is the SUM of the charges on individual constituent atoms present in the compound. Therefore, the oxidation number of sulfur (S) in H2SO4 is +6.

Given DATA:

MASS of Water = ?

no. of MOLES = 0.5

Molar mass of H₂O = 2(1) + 16 = 18 g/mol

Formula to be Used:

No. of moles = Given Mass/Molar mass

Solution:

No. of moles = Mass of Water/Molar mass

0.5 = Mass of Water/18

Mass of Water = 0.5*18

Mass of Water = 9g

Result:

The mass of 0.5 mole of water is 9g.

They're categorized BASED on the REACTIONS they help catalyze: Amylase breaks down starches and carbohydrates into sugars. Protease breaks down proteins into amino acids. LIPASE breaks down LIPIDS, which are fats and oils, into glycerol and fatty acids.

ong>ANSWER:

P2O5

Explanation:

it is more ACIDIC from all other SALTS in your question

TALK withme why DISTURB

ong>Explanation:

When forming an ion, a zinc atom loses its TWO valence ELECTRONS, becoming a Zn2+ ion. The chlorine atom has seven valence electrons, and will gain one valence electron to form a chloride ion, Cl1- . ... Therefore, two chloride IONS, Cl1- MUST bond with one zinc ion, Zn2+ .

(ɑ) The chemicɑl equɑtion is:

2FeSO4 ➪ Fe2O3+SO2+SO3

(b) The type of reɑction tɑking plɑce is "Decomposition reɑction" SINCE heɑt is used ɑnd it is ɑlso KNOWN ɑs thermɑl decomposition reɑction.

꧁ɧσ℘ε ıtร ɧεɭ℘ ყσน꧂

ong>Explanation:

MASS m = 125 g

Specific HEAT S = 380 cal/g

• Heat = m S
• = 125 × 380
• = 47500 cal

ong>Explanation:

MASS m = 25 g

Specific HEAT S = 63.7 cal/g

• Heat = m S
• = 25 × 63.7
• = 1592.5 cal

ong>Answer:

Explanation:

sebaceous glands are holocrine glands that produce sebum, a semiliquid mixture of glandular cell debris containing glycerides, FREE fatty acids, wax esters, SQUALENE, CHOLESTEROL, and cholesterol esters.

Sebaceous glands are present everywhere on the HUMAN skin except for the palms, soles, and dorsa of the feet.

Generally, they are associated with hair follicles and empty through a short duct

into the canal of the hair follicle.1 The sebaceous glands are holocrine glands that produce sebum,

a semiliquid mixture of glandular cell debris containing glycerides, free fatty acids, wax esters

, squalene, cholesterol, and cholesterol esters. The largest and most numerous sebaceous glands are found on the FACE, scalp, chest, and back.

____________________

ong>Answer:

DUE to SMALL size of N- atom and stable half FILLED configuration

Find the kinetic energy of an electron (in eV) emitted by a metal when LIGHT of WAVELENGTH 3105 angstrom falls on it

threshold wavelength is 6210 angstrom)

Answer

E = 0.1eV

ong>Explanation:

The product obtained will be 2-methyl-propane-2-ol. Explanation: Ethyl ACETATE is an acid derivative and when it is reacted with GRIGNARD REAGENT, the product DEPENDS on the amount of Grignard reagent.

ong>Answer:

i) Physical change, irreversible change.

...

Can be reversed (Yes/No)

The sawing of a PIECE of wood.

The MELTING of ICE candy.

Dissolving SUGAR in water.

The cooking of food.

The ripening of a MANGO.

i)CaO= calcium oxide

ii)CaO+H2O=Ca(OH)2

Substance X can't be Ca(OH)2 because in QUESTION the substance is asked not the solution (mixture of a substance and a liquid). So the substance is CaO and it's solution with WATER is Ca(OH)2.

Hope it helps.

ep 1: CONVERT KNOWN reactant mass to moles. ...

▪️Step 2: USE the mole ratio to FIND moles of other reactant. ...

▪️Step 3: Convert moles of other reactant to mass.

I hope this ANSWERS is helpful for you

प्रेशर कुकर आम तौर पर एल्यूमीनियम (एल्यूमीनियम) या स्टेनलेस स्टील से बने होते हैं। एल्यूमीनियम प्रेशर कुकर मुद्रित, पॉलिश या एनोडाइज्ड हो सकते हैं, लेकिन सभी डिशवॉशर के लिए अनुपयुक्त हैं।

ans.:-

EXPLANATION:

molecular mass of H2SO4=98g

molecular mass of HNO3 =63g

i hope it will help you.

ong>Answer:

Intermolecular Hydrogen BONDING: This OCCURS when the hydrogen bonding is between H-atom of one MOLECULE and an atom of the electronegative element of another molecule. For example. (i) hydrogen BOND between the molecules of hydrogen fluoride. (ii) hydrogen bond in ALCOHOL or water molecules.

ong>ANSWER:

NA cl

Explanation:

(a) OPTION is correct

ong>Answer:

ionisation enthalpy:

Ionization enthalpy of an ELEMENT can be defined as the AMOUNT of ENERGY required to remove an ELECTRON from an isolated gaseous atom in its gaseous STATE.

ong>Answer:

Carbon has the property of catenation. TWO or more carbon atoms can share some of their VALENCE electrons to form (single, double and triple) BONDS. (2) The straight chains or branched chains or rings may have different SHAPES and sizes. ... Hence, carbon atoms are capable of forming an unlimited nupiber of compounds.

ong>Answer:

Explanation:

(i) Group 13 has a greater atomic size as when going down a group, the atomic size increases, so an extra shell with electrons is ADDED, and the poor shielding effect is observed.

Group14- These have a covalent radius, and a small radius is observed, and the presence of the shielding effect is high as there are completely filled d and f orbitals.

(ii) The ionization enthalpy is unaffected by the group, and it decreases with increase in size. Group 13 has erratic ionization enthalpy as the nuclear charge is complemented by the screening effect.  

Group 14 experiences a high ionization enthalpy, and it subsequently decreases and due to the poor shielding effect.

(iii) All elements in group 13 are non-metallic except Boron, and the shielding effect is responsible for the low metallic character.  

Group 14 has Sn and Pb as metals and the metallic character increases on going down the group, so the carbon is classified as a non-metal and all OTHERS are metalloids

(iv) Group 13 has prevalent +3 oxidation states due to the lone pairs but slowly CHANGE to +1 as the group ORDER persist  

Group14 has + 4, and +2 oxidation states and the enthalpies are high, and they are covalent in nature.

(v)Group 13 forms trihalides and some electron acceptors act as Lewis Acids.  

Group 14 forms Halides by accepting electrons or sharing, making them covalent compounds.

ong>Answer:

1. Atom, smallest unit into which matter can be DIVIDED without the release of electrically charged particles. It also is the smallest unit of matter that has the characteristic properties of a chemical element. As such, the atom is the basic building block of chemistry.
2. Mass is both a property of a physical body and a measure of its RESISTANCE to acceleration (a change in its state of motion) when a net force is APPLIED. An object's mass also determines the strength of its gravitational attraction to other bodies. The basic SI unit of mass is the kilogram (kg).
3. one of two or more FORMS of a chemical element that have different physical characteristics but the same chemical characteristics
4. Isobars are elemnts which have different atomic numbers but the same mass number. They are different chemical elements.

Explanation:

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1.AMMONIA and OXYGEN without catalyst | NH3 + O2 → N2 + H2O. With supply of heat, ammonia reacts with oxygen and produce nitrogen gas and water as products. Nitrogen of ammonia is oxidized to nitrogen gas from -3 OXIDATION state to 0 oxidation state.

2.Ammonium nitrate, (NH4NO3), a salt of ammonia and nitric acid, used widely in FERTILIZERS and explosives. The commercial grade contains about 33.5 percent nitrogen, all of which is in forms utilizable by plants; it is the most common nitrogenous component of artificial fertilizers.