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परिभाषा और उसके महत्व को नीचे लिखा गया है -•पीएच एक समाधान की अम्लता या क्षारीयता के मापन का एक पैमाना है। पीएच पैमाने 0 से 14 तक होता है। •0 से 7 पीएच मान समाधान की अम्लीय प्रकृति को इंगित करता है जबकि7 से 14 पीएच समाधान की मूल प्रकृति को इंगित करता है। •पीएच दैनिक जीवन में महत्वपूर्ण भूमिका निभाता है -•पेट एसिड यानी हाइड्रोक्लोरिक एसिड की निश्चित सीमा होती है। इसके पीएच में और वृद्धि से भोजन के पाचन में समस्या हो सकती है जबकि किसी भी कमी से जलन और पेट के ऊतकों और कोशिकाओं को नुकसान हो सकता है। • पीएच मुंह में पाए जाने वाले एमाइलेज एंजाइम के समुचित कार्य के लिए भी जिम्मेदार है। यह हमारे भोजन के पाचन के लिए महत्वपूर्ण है। •पीएच मान में कोई भी परिवर्तन इस एंजाइम की कार्यक्षमता को प्रभावित कर सकता है।•पौधे की वृद्धि के लिए मिट्टी का पीएच भी कारक है। यह मिट्टी के सूक्ष्म जीवों को प्रभावित करता है और पौधों की जड़ों द्वारा खनिजों के भोजन और पानी के उठाव का कार्य भी करता है। •पौधे की इष्टतम पीएच स्थिति में परिवर्तन से पौधे की मृत्यु हो सकती है।

The CHARACTERISTIC feature of METALS to absorb heat and ELECTRICITY is KNOWN as CONDUCTIVITY

CO(NH2)2.Explanation:The moles of the CARBON will be 20/12 which will begin 1.6 mol. The moles of HYDROGEN will be 6.7/1 which is 6.7 mol. And the moles of nitrogen will be 46.67/14 which is 3.33 mol.So, if we take the total of 100 GRAM of the compound. Then moles of oxygen will be (100-20-6.7-46.67)/16 which will be 26.63/16 = 1.66 mol.So, the simplest ratio will be for carbon 1.6/1.6 = 1 , for hydrogen 6.7/1.6= 4, for nitrogen 3.33/1.6 =2 and for oxygen its 1.So, the empirical formulae is CH4N2O. Now the empirical formulae weight is 12+4+28+16=60. So, the MOLECULAR weight is 60/60 which is 1. So, molecular formulae same as empirical formulae CO(NH2)2.

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1litr EXPECTS zgsuuzcockejjao nanauuhs hajaq SNO sjaka

120.0945 is the CORRECT ANSWER

0.2g oxygen REQUIRED because to form WATER both the REACTANTS must have equal mass 4G water as I say that if both the reactants have equal mass so the mass will DOUBLE hope it will help you

it is OBTAINED when GYPSUM is HEATED at 373°k CaSo4.1/2H2O----------CaSo4.2H2O+3/2H2O

Galvanization is the process in which a layer of zinc is applied on top of metals such as IRON ,steel ,copper,ETC to prevent it from rusting.the coating of zinc prevents the moisture in the air from coming in contact with the metal(IE iron in this case) which MEANS the oxidation of iron dosent take place.hope it helped and pls mark as brainliest:)

At any RATE, it's true that iodine is much more soluble in CCl4 (carbon tetrachloride) than it is in water. If this is a question for SCHOOL, then the ANSWER you're PROBABLY meant to give is this: because iodine and CCl4 are both non-polar, while water is polar.

An expedient one-step SYNTHESIS of 2-iodoglycals and 2-bromoglycals from glycals using NIS/AgNO3 and NBS/AgNO3 as reagent systems has been DEVELOPED. The UTILITY of these 2-haloglycals has been demonstrated by converting them into 2C-branched glycals via the Heck coupling REACTION. Ferrier reaction of tri-O-acetyl-2-iodoglycals followed by Heck coupling reaction with methyl acrylate leads to 2C-branched O-glycosides.

On the basis of chemical composition TYPES of MATTER CLASSIFIED into elements, compounds.... Hope it HELPS...

ANSWERBoth NH 4+ and CH 3 COO − ion of CH 3 COONH 4 CH 3 COONH 4 +H 2 O⇋CH 3 COO − +NH 4+ 1 0 0 1−h h hpK a (CH−3COOH)=4.76⟹K a =1.74×10 −5 PK b (NH 4 OH)=4.75⟹K b =1.78×10 −5 K H for CH 3 COONH 4 = K a K b K w = (1.74×10 −5 )(1.78×10 −5 )10 −14 =3.23×10 −5 also, h for CH 3 COONH 4 = K H = 3.23×10 −5 =5.68×10 −3 CH 3 COOH⇋CH C OO − +H + K a = [CH 3 COOH][CH 3 COO − ][H + ] = ChC(1−h)[H + ] [H + ]=K a 1−h1 =K a K H =K a K a ×K b K w − K b K w K a = 1.78×10 5 10 −14 ×1.74×10 −5 [H + ]=9.88×10 −8 pH=7.005[pH and h are independent of initial concentration of Salt]

the Force of attraction between the OXIDES and a Ca ION is STRONGER than the Force of attraction between bariam and calciumhope it helps❤️❤️❤️❤️❤️

The pH of the solution is 13Explanation:MOLECULAR weight of NAOH = 40Weight of NaOH = 8gMoles of NaOH = Weight/Molecular weight                          = 8/40 = 0.2 molesMolecular weight of H₂SO₄ = 98Weight of H₂SO₄ = 4.9gMoles of H₂SO₄ = Weight/Molecular weight                          = 4.9/98 = 0.05 moles1 mole of NaOH will give = 1 mole of OH⁻ ions0.2 moles of NaOH will give = 0.2 moles of OH⁻ ions1 mole of H₂SO₄ will give = 2 moles of H⁺ ions0.05 moles of H₂SO₄ will give = 0.05 × 2 = 0.1 moles of H⁺ ionsThus 0.1 moles of H⁺ will be neutralised by 0.1 moles of OH⁻ ionsAnd 0.1 moles of OH⁻ ions will be leftConcentration of OH⁻ ions = 0.1/1 = 0.1 Mor, [OH⁻ ] = 0.1 MpOH = -log[OH⁻ ] = -log(0.1) = -log10⁻¹ = 1We know thatpH + pOH = 14Thus, pH + 1 = 14or, pH = 14 - 1 = 13Therefore pH of the solution is 13

I would determine the mass of a fixed volume of the gas at a known TEMPERATURE and pressure and then use the IDEAL Gas Law to calculate the molar mass.Explanation:EXAMPLEThe mass of an evacuated 255 mL flask is 143.187 g. The mass of the flask filled with an unknown gas at 25.0 °C and 265 Torr is 143.289 g.SolutionThe Ideal Gas Law is∣∣∣∣¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯aaPV=nRTaa∣∣−−−−−−−−−−−−−−− SINCE n=massmolar mass=mM , we can write the Ideal Gas Law as∣∣∣∣¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯aaPV=mMRTaa∣∣−−−−−−−−−−−−−−−− We can rearrange this to getM=mRTPV m=143.289 g - 143.187 g=0.102 g R=0.082 06 L⋅ATM⋅K-1mol-1 T=(25.0 + 273.15) K=298.75 K P=265torr×1 atm760torr=0.3487 atm V=0.255 L ∴ M=0.102 g×0.082 06L⋅atm⋅K-1mol-1×298.15K0.3487atm×0.255L=28.1 g/molThe molar mass is 28.1 g/mol.∴ The molecular mass is 28.1 u.

r Bohemian Rhapsody Bohemian Rhapsody is about the iconic rock band QUEEN , and their legendary LEAD SINGER Freddie Mercury , who is played by American actor Rami malek . Hope it's helped you ..PLZ marks as Brainleist ANSWER

ionization enthalpy of nitrogen is greater than oxygen EXPLANATION:since the nitrogen is half STABLE so it is hard to remove an ELECTRON from VALENCY shell so nitrogen has more ionization enthalpy than that of oxygenhope it help u

tion:A SMALL loop is FORMED at the end of a platinum wire. The loop is cleaned with concentrated hydrochloric acid and dipped in powdered BORAX, then heated in the flame of a Bunsen burner until the borax MELTS, FORMING a bead. The bead is dipped into a tiny amount of the compound to be tested and is reheated in the flame.

when the match STICK catches fire or is burnt, the heat released due to the burning of CHEMICALS on the match stick head, partly decomposes the WOOD to form wood gas the wood gas then catches fire and produces FLAME, different COLOURED zones in the flame

The more ELECTRONS shielding the OUTER electron shell from the nucleus, the less energy required to expel an electron from said atom. The higher the shielding EFFECT the lower the ionization energy. It is because of the shielding effect that the ionization energy decreases from top to BOTTOM WITHIN a group.

Hey mate U can SEE in FIGURE.... Hope it helps...

Mark as me Brainliest SO I will follow you. You get a mixture of SODIUM, chloride, and hydrogen ions, but there is no net reaction, because both of the positively CHARGED ions are COMPLEMENTED by chloride ions. If you heat the mixture, the HCl will evaporate out and leave the NaCl BEHIND.

tation :when the heavier component in a mixture settles after water is added to it, the process is called Sedimentation. Decantation : when water(along with the dust) is removed, the process is called Decantation. If a mixture of such liquids is allowed to STAND for some time, they form two separate layers.example --sand and SILT can be carried in suspension in river water and on REACHING the sea bed DEPOSITED by sedimentation. example -- in red wine, where the wine is decanted from the potassium bitartrate CRYSTALS to avoid unsavory taste.

crystallization is BETTER than evaporation.Explanation:because, some SOLIDS can decompose or get burnt during evaporation. ALSO in some cases some impurities remain in the solution while evaporation which cannot be REMOVED even after FILTRATION.

:way to increase PRESSURE :1) By APPLYING knife less area more pressure. 2) applying nails. way to decrease pressure :1) bridge more area less pressure. 2) USING military TANK.

poison becomes more POISONOUS after the EXPIRY DATE. please......pls mark me as a BRAINLEST

1. Acidic oxide - an acidic oxide reacts with water and produce acid. EX. So2, co2, ETC. 2. Basic oxide - an basic oxic reacts with water to GIVE a base. EX. CAO, BAO, etc. 3. Amphoteric oxide - an amphoteric oxide is that metallic oxide DISPLACING a dual behaviour. EX. ALUMINIUM oxide reacts with alkalies as well as acids. Hope this will help you

trends variation of METALLIC and NON metallic character in period and group : In period : As ionisation enthalpy increases across a period from left to RIGHT, the metallic character decreases. Since electron gain enthalpy becomes more negative across a period, nonmetallic character increasesIn group : As ionisation enthalpy decreases down the group, tendency to LOSE valence electrons increase. Hence, metallic character increases and nonmetallic character decreases.

see psuedoinert CONFIG is that config which an element or atom have in its IONIC form not in its normal stateand INERT gas config of and element is the config which it have in its ground state EXPLANATION:the novle gas comfig must have 8 or 18 electrons in its OUTERMOST shellbut psuedo config have 18 electrons in its outermost shell.example of psuedo config will be Zn+2 normal config is 3s2 3p6 4s2 3d10 right.. now +2 means 2 electrons are removed so config will become 3s2 3p6 3d10count the number of electrons it's 18..

chemical cell is DEFINE as the cell in wchich chemical energy CONVERT in to ELECTRICAL energy The FORMATION of cell REQUIRED anode and cathode .

because in CUTTING wood it is physically change but in burni wood it's total PROPERTY GET change

tion:a),VOLUME -SOLID have fixed volume ,but LIQUID and gas don't have.b)SHAPE-solid have fixed shape but ,liquid and gas don't have .C)COMPESSIBILITY-gas can be COMPRESSED but liquid and solid can't .d)DIFFUSION-gas and liquid have diffusion but liquid don't have.

Hiiii...Newton's THIRD law states that...Every ACTION has EQUAL and opposite reaction...Hope this HELPS...❤☺☺❤

the Kepler's THIRD law states that the square of the orbital period of a PLANET is proportional to the cube of the semi-major AXIS of its orbitplz mark as brainliesti really need this

your required answer HCL equal to 36 percent by MASS that is wbyw now 36 gram HCL in hundred gram solution density equal mass by volume hundred DIVIDED by 12 into 10 ki power MINUS 3 gram PER litre Gram Gram gets cancel now 100/3 therefore the density is 8.3 into 10 ki power 3 per litre and this is required answer

The three dimensional shape or configuration of a molecule is an important characteristic. This shape is dependent on the preferred spatial orientation of covalent bonds to atoms having two or more bonding partners. Three dimensional configurations are best viewed with the aid of models. In order to represent such configurations on a two-dimensional surface (paper, blackboard or screen), we often use perspective drawings in which the direction of a bond is specified by the line connecting the bonded atoms. In most cases the focus of configuration is a carbon atom so the lines specifying bond directions will originate there. As defined in the diagram on the right, a simple straight line represents a bond lying approximately in the surface plane. The two bonds to substituents A in the structure on the left are of this kind. A wedge shaped bond is directed in front of this plane (thick end toward the viewer), as shown by the bond to substituent B; and a hatched bond is directed in back of the plane (away from the viewer), as shown by the bond to substituent D. Some texts and other sources may use a dashed bond in the same manner as we have defined the hatched bond, but this can be confusing because the dashed bond is often used to represent a partial bond (i.e. a covalent bond that is partially formed or partially broken). The following examples make use of this notation, and also illustrate the importance of including non-bonding valence shell electron pairs (colored blue) when viewing such configurations . Methane Ammonia WaterBonding configurations are readily predicted by valence-shell electron-pair repulsion theory, commonly referred to as VSEPR in most introductory chemistry texts. This simple model is based on the fact that ELECTRONS repel each other, and that it is REASONABLE to expect that the bonds and non-bonding valence electron pairs associated with a given atom will prefer to be as far apart as possible. The bonding configurations of carbon are easy to remember, since there are only three categories.Configuration Bonding Partners Bond Angles ExampleTetrahedral 4 109.5º Trigonal 3 120ºLinear 2 180ºIn the three examples shown above, the central atom (carbon) does not have any non-bonding valence electrons; consequently the configuration may be estimated from the number of bonding partners alone. For molecules of water and ammonia, HOWEVER, the non-bonding electrons must be included in the calculation. In each case there are four regions of electron density associated with the valence shell so that a tetrahedral bond angle is expected. The measured bond angles of these compounds (H2O 104.5º & NH3 107.3º) show that they are closer to being tetrahedral than trigonal or linear. Of course, it is the configuration of atoms (not electrons) that defines the the shape of a molecule, and in this sense ammonia is said to be pyramidal (not tetrahedral). The compound boron trifluoride, BF3, does not have non-bonding valence electrons and the configuration of its atoms is trigonal. Nice treatments of VSEPR theory have been provided by OXFORD and Purdue . Click on the university name to visit their site.The best way to STUDY the three-dimensional shapes of molecules is by using molecular models. Many kinds of model kits are available to students and professional chemists. Some of the useful features of physical models can be approximated by the model viewing applet Jmol. This powerful visualization tool allows the user to move a molecular stucture in any way desired. Atom distances and angles are easily determined. To measure a distance, double-click on two atoms. To measure a bond angle, do a double-click, single-click, double-click on three atoms. To measure a torsion angle, do a double-click, single-click, single-click, double-click on four atoms. A pop-up menu of commands may be accessed by the right button on a PC or a control-click on a Mac while the cursor is inside the display frame.You may examine several Jmol models of compounds discussed above by .One way in which the shapes of molecules manifest themselves experimentally is through molecular dipole moments. A molecule which has one or more polar covalent bonds may have a dipole moment as a result of the accumulated bond dipoles. In the case of water, we know that the O-H covalent bond is polar, due to the different electronegativities of hydrogen and oxygen. Since there are two O-H bonds in water, their bond dipoles will interact and may result in a molecular dipole which can be measured. The following diagram shows four possible orientations of the O-H bonds.

here is UR ansExplanation:SEE above

Hello friend...!! It is given that, 2NO (g) + O2 (g) -------> 2NO2(g)2vol : 1 VOL ------> 2vol ( according to LUSSAC's law) •To calculate amount of unused NO NO : O22 : 1 X : 200 Implies X = 400 cm^3.Total given nitrogen monoxide is 450 THEREFORE 450 - 400 = 50cm^3.• To calculate amount of NO2 FORMED :O2 : NO2 1 : 2 200 : X1Implies X1 = 400cm^3.Therefore unused NO = 50cm^3 and amount of NO2 formed = 400cm^3Therefore the total mixture composition is 450 cm^3.--------------------------------------------Hope it is useful...!! Read more on Brainly.in - brainly.in/question/3262310#readmore