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tion:The number in a MOLE, AVOGADRO's number, is related to the relative sizes of the atomic mass unit and GRAM mass units. Whereas one hydrogen atom has a mass of APPROXIMATELY 1 u, 1 mol of H atoms has a mass of approximately 1 gram.

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is more acidic than alcohols due to STABILISATION of PHENOXIDE ION through resonance. Presence of electron WITHDRAWING group INCREASES the acidity of phenol by , stabilising phenoxide ion while presence of electron releasing group decreases the acidity of phenol by destabilising phenoxide ion.

•●○ Strain theory, in chemistry, a proposal made in 1885 by the German chemist Adolf von Baeyer that the stability of CARBOCYCLIC compounds (i.e., those of which the molecular STRUCTURE INCLUDES one or more rings of carbon atoms) depends on the amount by which the angles between the chemical bonds deviate from the value (109°28′) observed in compounds not containing such rings. The amount of deviation is the measure of the strain of the ring: the greater the strain, the less stable is the ring. Baeyer postulated that these rings are planar and concluded that strain exists in three- and four-membered rings and in rings of six or more atoms, the strain increasing with the size of the ring. The least STRAINED ring is that of five-carbon cyclopentane, in which the bond angles are 108° ○●•Explanation:please thank all my ANSWERS.

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given VOLUME of hydrogen gas at STP ( Standard temperature and PRESSURE ) as 0.488 litres.We have to calculate the number of mole.Since we are given the volume, number of mole can be calculated as :⇒ Num. of mole = Volume / 22.4[ 22.4 because of STP ]⇒ Num. of mole = 0.488 / 22.4 [ Given ]⇒ Num. of mole = 0.02 moleHence, The number of mole of Hydrogen gas in this case is 0.02 moleSome INFORMATION :- • If we have to find the number of mole of an atom or molecule we can do so using the given formula : Num. of mole = Mass given / MOLAR mass• 1 mole of an atom or molecule has 6.022 × 10²³ atoms or molecules RESPECTIVELY.

म यांत्रिकी में मुख्य क्वांटम संख्या (principal QUANTUM number / संकेत n) इलेक्ट्रान की प्रावस्था को अभिव्यक्त करने वाली चार क्वाण्टम संख्याओं में से एक है। यह संख्या सदा एक पूर्णांक होती है (1, 2, 3...) । ... यह क्वाण्टम संख्या, इलेक्ट्रॉन की कक्षा की औसत त्रिज्या का भी सूचक है।please make my ANSWER brainliest

In the aqueous SOLUTION, copper sulphate dissociates into its respective ions. On passing electric current, the copper ions (cations) move towards the cathode and GET DEPOSITED as copper. Simultaneously, the sulphate ions (anions) move towards the anode. So, BLUE COLOUR of the solution disappears. 

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Because DISTILLED water is so pure, it is a COMMON tool used in the medical field. Hospitals USE distilled water to prepare food for their patients and sterilize materials. Surgeons use distilled water during medical procedures.Nov

Molarity changes with temperature. Molarity is moles of solute per litre of solution. WATER expands as the temperature increases, so the VOLUME of the solution also increases. You have the same NUMBER of moles in more LITRES, so the molarity is less at higher TEMPERATURES.

Most scorpions are active at night. During the day they hide under BOARDS, rocks and rubbish. MULCH is also a FAVORITE HARBORAGE area. In houses, they are most often found in undisturbed areas such as CLOSETS, shoes, bedding and folded.

tion:A PHYSICAL change is a change to the physical—as opposed to chemical—PROPERTIES of a substance. They are usually reversible. The physical properties of a substance INCLUDE such characteristics as shape (VOLUME and size), color, texture, flexibility, density, and mass.I think it HELPS you a lot

1:1Explanation:The ratio of MOLECULES in 1 mole of NH3 and 1 mole of HNO3 is 1:1. Explanation: Mole is a SI unit which we use to measure the amount of the CHEMICAL compounds. And according to the definition of mole we CAME to know that a constant amount of molecules are present in one mole amount of any chemical COMPOUND.

Alkanes provide a particular analytical challenge to commonly used chemical ionisation methods such as proton-transfer from water owing to their basicity. It is demonstrated that the fluorocarbon ions CF3+ and CF2H+, generated from CF4, as reagents provide an effective means of detecting light n-alkanes in the range C2–C6 using direct chemical ionisation mass spectrometry. The PRESENT work assesses the applicability of the reagents in Chemical Ionisation Mass Spectrometric (CI-TOF-MS) environments with factors such as high moisture content, operating pressures of 1–10 Torr, accelerating electric fields (E/N) and long-lived intermediate complex formation. Of the commonly used chemical ionisation reagents, H3O+ and NO+ only react with hexane and higher while O2+ reacts with all the target samples, but creates SIGNIFICANT fragmentation. By contrast, CF3+ and CF2H+ acting together were found to produce little or no fragmentation. In dry conditions with E/N = 100 Td or higher the relative intensity of CF2H+ to CF3+ was mostly less than 1% but always less than 3%, making CF3+ the main reagent ion. Using O2+ in a parallel series of experiments, a substantially greater DEGREE of fragmentation was observed. The detection sensitivities of the alkanes with CF3+ and CF2H+, while relatively low, were found to be better than those observed with O2+. Experiments using alkane mixtures in the ppm range have shown the ionisation technique BASED on CF3+ and CF2H+ to be PARTICULARLY useful for measurements of alkane/air mixtures found in polluted environments. As a demonstration of the technique's effectiveness in complex mixtures, the detection of n-alkanes in a smoker's breath is demonstrated.

on which change depends: Temperature - from the view of CHEMISTRY change in TEMP. can causechange in STATE of a substance. Ex- WATER to ICE.

In periodic table 5TH period and 13th GROUP is Titanium it's atomic NUMBER is 81

1.99×Explanation:                 MASS of  ONE CARBON atom=molecular mass of carbon/Avogadro no.                                               =12/6.022*10^ -23                                               =1.99*10^ -23

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Ferric oxide reacts with ALUMINIUM to produce aluminium oxide and iron. The balanced chemical equation for the given reaction is : Fe2O3 + 2AL → AL2O3 + 2FE.

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tion:Amphibians have smooth, sticky, moist and highly porous skin to perform the VARIOUS FUNCTION, whereas reptiles have dry, hard and scaly skin, which GUARD them in harsh CONDITION. Amphibians lay their eggs in water which are covered with gel, while reptiles lay their eggs on land, and have a hard protective shell.May 18, 2018

tion:I) A monobasic acid has only one hydrogen ion to donate to a base in an acid-base REACTION. Hence, a monobasic molecule has solely one replaceable hydrogen ATOM. Monobasic acids ionize in water to give only one H+ ion per acid molecule. Example: HCl.ii) Some acids, such as hydrochloric and nitric acids, are strong electrolytes, completely DISSOCIATED into ions; these acids are known as strong acids. Others, such as acetic and nitrous acids, are only partially dissociated in solution. These acids are weak electrolytes and are known as weak acids.iii) Ammonia gas is a covalent compound.As there are no ions PRESENT in it it does or conduct electricity. ... Due to the presence of these ions an aqueous solution of NH3 gas in water conducts electricity. Related Answer. The atoms of copper contain electrons and the atoms of rubber ALSO contain electrons.

If their atomic mass are 30 and 20 respectively. Molecular FORMULA of the COMPOUND is. The molecular formula for compound is X2Y3pls thank me

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Viscosity DEPENDS on the amount of hydrogen bonding between molecules and the PRESENCE of more −OH group, glycerol involved in INTRAMOLECULAR hydrogen bonding within the molecule, thus glycerol is more viscous than ethylene glycol.

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These FACTORS are: The number of protons in the nucleus (called the nuclear charge). The number of energy levels HOLDING electrons (and the number of electrons in the OUTER energy LEVEL). The number of electrons held between the nucleus and its outermost electrons (called the SHIELDING effect).