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51451.

Balance the following equations in acidic medium by both oxidation number and ion electron methods and identify the oxidants and the reductants. H2S + Cl2 ----->S + Cl-

Answer»

MnO 4− +C 2 H 2 O 4 ⇌Mn 2 +CO 2 +H 2 OMn+7 O−2 4− + C 2 +3 H 2 +1 O 4 −2 ⇌ Mn 2 0 + C+4 O 2 −2 + H 2 + O−2 Oxidation: C 2 +3 H 2 1 O 4 −2 ⟶ C+4 O 2 −2 Rediuction: Mn+7 O 4− −2 ⟶ Mn 2 0 Balancing on both sides;O:C 2 H 2 O 4 ⟶2CO 2 +2H + R:2MnO 4− ⟶Mn 2 +8H 2 O⇒O:C 2 H 2 O 4 ⟶2CO 2 +2H + +2e − R:14e − +2MnO 4− +16H + ⟶Mn 2 +8H 2 O__________________________________________7C 2 H 2 O 4 ⟶14CO 2 +14H + +14e − 2MnO 4− +16H + +14e − ⟶Mn 2 +8H 2 O⇒7C 2 H 2 O 4 +2MnO 4− +16H + +14e − ⇌14CO 2 +MN 2 +14H + +8H 2 O+14e −

51452.

Write the library preparation of nitrogen​

Answer»

Nitrogen is the lightest member of group 15 of the periodic table, often called the PNICTOGENS. It is a common element in the universe, estimated at about seventh in total ABUNDANCE in the Milky Way and the Solar System. At standard temperature and pressure, two atoms of the element bind to form dinitrogen, a colourless and odorless diatomic GAS with the formula N2. Dinitrogen forms about 78% of Earth's atmosphere, making it the most abundant uncombined element. Nitrogen occurs in all organisms, primarily in amino acids (and thus proteins), in the nucleic acids (DNA and RNA) and in the energy transfer molecule adenosine triphosphate. The human body contains about 3% nitrogen by mass, the fourth most abundant element in the body after oxygen, carbon, and hydrogen. The nitrogen cycle describes movement of the element from the air, into the biosphere and ORGANIC compounds, then back into the atmosphere

51453.

What is centromere? ..thanks so much ✌✌❤❤❤,Guys plz complete 200 followers, (DON'T spam or your answer will be reported)​

Answer»

The centromere is the SPECIALIZED DNA sequence of a chromosome that links a pair of sister chromatids. During mitosis, spindle fibers attach to the centromere via the kinetochore. Centromeres were first THOUGHT to be GENETIC loci that DIRECT the behavior of chromosomes. IG:rajpriyanshu1169

51454.

What is photosynthesisgm sibbo jald milege take care ✨✨☺​

Answer»

The PROCESS by which GREEN PLANT TURN carbon dioxide and WATER into food using energy from sunlight.

51455.

Pls give the ans asap​

Answer»

Silver nitrate —> Zinc nitrate + SilverZn + AgNO3 → Ag + Zn(NO3)2 : Put a "2" in FRONT of the AgNO3 to balance the NO3 (nitrate). Balance the Ag on the product side. => Zn + 2AgNO3 = 2Ag + Zn(NO3)2 Aluminium + Copper chloride => Aluminium chloride + CopperAI + CuCI2 => AICI3 + Cu : Put a coefficient of two in front of the AlCl3. Change the coefficient in front of CuCl2 to balance the chlorine atoms. => 2Al + 3CuCl2 = 2AlCl3 + 3Cu Barium chloride + Potassium sulphate => Barium sulphate + Potassium chloride BaCl2 + K2 SO4 => BaSO4 + KCl : Change the coefficient in front of the KCl to balance the equation. Put a "2" in front of the KCl on the product side of the equation. => BaCl2 + K2 SO4 = BaSO4 + 2KClPotassium bromide (AQ) + Barium Iodide (aq) => Potassium Iodide (aq) + Barium bromide (s)2KBr(aq)+ BaI2(aq)→ 2KI(aq )+ BaBr2(s)It is a double diaplacement reaction. A double displacement reaction is a TYPE of reaction in which two reactants exchange ions to form two new COMPOUNDS.Zinc carbonate (s) => Zinc oxide (s) + Carbon dioxide (g) ZnCO3 (s) => ZnO (s) + CO2 (g)It is a decomposition reaction. A decomposition reaction is a reaction in which a compound breaks down into two or more simpler substances. Hydrogen (g) + Chlorine (g) => Hydrogen Chloride (g)H2 (g) + CL2 (g) => 2HCl (g)It is a combination reaction. A combination reaction is a reaction where two or more elements or compounds combine to form a single compound (product).

51456.

Name the technique that is commonly used for determining the % carbon in cast irons.

Answer»

Çast IronsExplanation:Most cast IRONS have a CHEMICAL composition of 2.5–4.0% carbon, 1–3% silicon, and the REMAINDER is iron. GREY cast iron has less tensile strength and SHOCK resistance than steel, but its compressive strength is comparable to mild steel.hope this helps pls mark as brainlist...

51457.

Help please help gys​

Answer» C EXPLANATION:HOPE it will HELPFUL for you THANKS...
51458.

Defire isotopes .and neutronsHow+presentelectrons ,proton Mg2– and cu2±​

Answer»

The atomic number of the element equals the number of protons. CALCULATING the number of neutrons then BECOMES atomic MASS of the isotope minus the atomic number of the element equals the number of neutrons. For uranium-235, atomic number 92, the number of neutrons is 235-92=143, or 143 neutrons.

51459.

09. Define Gold number .​

Answer»

The GOLD Number is the minimum weight of a protective COLLOID required to prevent the coagulation of 10 ml of a STANDARD hydro gold sol when 1 ml of a 10% sodium chloride solution is added to it. It was first USED by Richard ADOLF Zsigmondy.

51460.

What is the speed of light in vacuum​

Answer»

approximately 300,000 kilometers per secondExplanation:LIGHT travels at approximately 300,000 kilometers per second in a VACUUM, which has a refractive index of 1.0, but it slows down to 225,000 kilometers per second in water (refractive index of 1.3; see FIGURE 2) and 200,000 kilometers per second in GLASS (refractive index of 1.5).

51461.

Explain the reaction between the base and metal with neat labelled diagram

Answer» TION:MARK ME AS BRAiLNlLIEST IF IT HELPS YOU
51462.

The thermosetting polymer among the following is (CO3 L1). ​

Answer»

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51463.

The stable nuclides have average binding energy in the range (a) 6.0 to 7.0 MeV(b) 5.0 to 6.0 MeV(c) 7.4 to 8.3 MeV.(d) 8.0 to 9.0 MeV​

Answer»

nch of SCIENCE concerned with the substances of which MATTER is composed, the INVESTIGATION of their PROPERTIES and reactions, and the use of such reactions to form new substances.

51464.

1 ) Calculate mass of water produced by 150 gram ethane combustion ?​

Answer» TION:Since, the given WEIGHT of methane is 150 g, HENCE the water produced by the COMBUSTION of 150 g of methane is 300G.
51465.

Q10. What are emulsions? Give an example of oil in water and water in ol emulsion​

Answer»

Familiar foods illustrate examples: MILK is an oil in water emulsion; MARGARINE is a water in oil emulsion; and ice CREAM is an oil and air in water emulsion with solid ice particles as WELL. Other food emulsions include mayonnaise, salad dressings, and sauces such as Béarnaise and Hollandaise.

51466.

Which atomic orbital is spherical in shape? * (a) 2s (b) 3p (c) 3d (d) 4f​

Answer» TION:Laura NeulatFrance“When Pedro found out he was being transferred to a Covid-19 ward, he was overcome with fear. A young physiotherapist specialized in orthopedics; he enjoyed working at one of Paris’s largest hospitals. Now he was going to spend his days around Covid-19 patients, who needed breathing therapy after leaving the intensive care unit – holding them in his ARMS, keeping his face NEAR theirs. In our weekly tele-session, a few days before he was due to start his NEW role; I encouraged him to focus on feelings of safety. I suggested he carry an index card with a thought that made him feel strong, such as The FORCE is with me! I further suggested he focus mentally on that mantra on his way to the hospital; also knowing he had it in his pocket, just in case. Pedro had learned to use mindfulness to regulate emotions and we said he was going to put on his protective equipment in mindfulness, focusing on every piece of equipment and telling himself, This cap keeps me safe, etc. Once all GEARED up, he would tell himself, I am safe. I feel at times we as psychologists must be able to afford flexibility with our boundaries. So parallel to the sessions, every evening I recorded a 10 second video of my street at 8:00 p.m., when we open windows for the applause to thank health workers, and I sent them to him with two words: Thank you. Pedro texted me Sunday evening: Thank you, I am now ready. At the end of his first day in his new role he texted me: I have just finished my day, it all went all right, I felt strong.”
51467.

इकाई / Unit-III . (a) क्रिस्टल क्षेत्र विपाटन ऊर्जा पर लिगेण्ड कीप्रकृति के प्रभाव के उपयुक्त उदाहरण देकरस्पष्ट कीजिए।Explain the effect of nature of ligandsover the crystal field splitting energy withsuitable examples.​

Answer»

nch of SCIENCE concerned with the SUBSTANCES of which matter is COMPOSED, the investigation of their properties and REACTIONS, and the USE of such reactions to form new substances.

51468.

The aufbau principal state that a] only two electron can occupy an orbitalb] electrons enter the lowest available energy levelc] electron remain unpaired if possibled] orbitals are regain is space where one is likely to find an electron​

Answer»

Here's UR ANSWER MATE:-b) ELECTRONS enter the lowest available ENERGY levelHope it helps uh!

51469.

खालील विधाने दुरुस्त करून लिहा. pH मापनश्रेणीनवर अमलाची तीव्रता 0ते 7पर्यंत वाढत जाते.​

Answer»

किसी नियत ताप पर, किसी द्रव के निश्चित आयतन में घुल सकने वाली किसी गैस की मात्रा उस गैस के उस द्रव के साथ साम्यावस्था की स्थिति में आंशिक दाब के समानुपाती होती है। प्रतिबन्ध यह है कि घुलने वाली गैस उस द्रव के साथ कोई रासायनिक क्रिया न करे।इस नियम को दूसरे शब्दों में इस प्रकार भी कह सकते हैं-किसी गैस की किसी द्रव में घुलनशीलता उस गैस के उस द्रव के उपर स्थित आंशिक दाब के समानुपाती होता है।सामान्य जीवन में हेनरी के नियम का उदाहरण बार्बोनित मृदु पेयों में देखने को मिलता है।हेनरी के नियम की सीमाएँ निम्न हैं:दाब बहुत अधिक न हो।ताप बहुत कम न हो।विलयन तनु हो।गैस,विलायक से रासायनिक अभिक्रिया न करे।

51470.

Odd number of protons and neutrons are present in how many elements ? (a) 'One(b) Five(C) Six(d). Seven​

Answer»

Periodic table (redirect from Periodic table of the ELEMENTS)occurring isotopes: all of its atoms have six PROTONS and most have six neutrons as well, but about ONE per cent have seven neutrons, and a very small FRACTION

51471.

Magnesium hydroxide reacts with nitric acid(Hydrogen nitate) to give magnesium nitrate and water. Two elements X and Y belong to group 1 and 2 respectively in the same​

Answer»

gfrutdtdydyxts s

51472.

इकाई / Unit-III (a) क्रिस्टल क्षेत्र विपाटन ऊर्जा पर लिगण्ड कीप्रकृति के प्रभाव के उपयुक्त उदाहरण देकरस्पष्ट कीजिए।Explain the effect of nature of ligandsover the crystal field splitting energy withsuitable examples.​

Answer» NCH of science concerned with the substances of which MATTER is COMPOSED, the investigation of their properties and reactions, and the use of such reactions to FORM new substances.
51473.

Please answer it correctly​

Answer» ANSWER is C SIMPLE Explanation:MARK as brainliest
51474.

What is the formula of mass percent?​

Answer»

istry, the MASS fraction of a SUBSTANCE within a mixture is the RATIO w_{i} of the mass m_{i} of that substance to the total mass {\displaystyle m_{\TEXT{tot}}} of the mixture. EXPRESSED as a formula, the mass fraction is: {\displaystyle w_{i}={\frac {m_{i}}{m_{\text{tot}}}}.}

51475.

a) 4FeS 2 +110 2 2Fe 2 O 3 +8SO 2 If 60g pyrites are roasted, calculate i) Volume of oxygen consumed at STP ii) Weight of ferric oxide formed iii) Weight of sulphurdioxide evolved during this process (FeS 2 =120 , FeO 3 =160) b) What volume of oxygen would be required for the complete combustion of 100 ltr of ethane according to the following equation 2C 2 H 6 +7O 2 4CO 2 +6H 2 O c) How many total number of atom in 0.5 mole S*O_{2} ?​

Answer»

ydodyoyddyoydydiisfgisfisgisgisifsgisgistisitifsits

51476.

-C1 + Mg dry ether HOB ► A The product 'B' in the above reaction sequence is, a. Mg b. -Mg-C1 c. Ci K Mg d.​

Answer» B. -Mg-C1Explanation:HOPE it is HELPING..
51477.

Why An element Z has atomic number 16?​

Answer» PRANAY KOTI REDDY chExplanation:pranay koti Reddy CH
51478.

A block weighs 15N air and 12N when immersed in water . The specific gravity of the block is (a) 0.8(b) 0.25(c) 5/4(d) 5 ​

Answer» ANSWER =D (5) LIKE and FOLLOW PLS
51479.

Methane gas burns in the presence of oxygen to give carbon dioxide, water, and heat. The number of molecules required for atleast one complete combustion reaction is: ​

Answer»

your ANSWER is 3..HOPE its HELP U ✌️

51480.

Define soil profile. Explain the profile of soil?​

Answer»

A soil profile is a vertical cross-section of the soil, made of layers running parallel to the surface. ... These layers or horizons are known as the soil profile. It is the vertical section of the soil that is exposed by a soil pit. The layers of soil can easily be identified by the soil colour and size of soil particles.please HELP me for making the 2 k (2000) thanks and regards for the 300 FOLLOWER ❤️❤️❤️ please GUYS ❤️❤️❤️

51481.

Defind colligative property ​

Answer»

Colligative properties of SOLUTIONS are properties that DEPEND UPON the concentration of solute molecules or ions, but not upon the identity of the solute. Colligative properties include vapor pressure lowering, boiling point elevation, freezing point depression, and osmotic pressure.Explanation:plz mark as brainliest if it was helpful[email PROTECTED]FOLLOW in ig @jinse_poly(◠‿◕)

51482.

Observe the diagram 1)Write a balanced chemical equation for the reactants used in above experiment . 2)State which type of chemical reaction is this . 3)Write your observation for the above experiment.4)Write one example for such type of chemical reaction .​

Answer» GOOD morningExplanation:how are you
51483.

b) What volume of oxygen would be required for the complete combustion of 100 ltr of ethane according to the following equation 2C,H 6 +7O 2 4CO 3 +6H 3 O​

Answer»

tion:2 VOL of ETHANE reacts with 7 vol of OXYGEN. So, 100 litres of ethane will REQUIRE 100×3. 5=350 litres

51484.

THE last sub shell of an element is 3p and there are 3 electrons in it write the complete electronic configuration of the element identify its period, group and block​

Answer» THA last SUB shell of tha elemant is 3P and eloctronic are cofirering whos bant tha SE up GROV
51485.

What is electrode potential?​

Answer»

Electrode POTENTIAL for any GIVEN electrode is the VOLTAGE or potential difference of a cell assembled from a STANDARD hydrogen electrode and the given electrode with the potential that is being defined.

51486.

in chemistry chemical reaction somewhere lead nitrate is in the form of solid and some where it is in the form of liquid. Can you answered my question ? why this happens ?​

Answer» ASED on TEMPERATURE it is HEATED
51487.

Answer the following questions : 1) Air is an example of homogeneous mixture. Give reasons. 2) What is sublimation? What is a sublimate?3) What do you mean by desirable changes and undesirable changes? Give one example of each. 4) What is an element?5) Name a non-metal which is lustrous. ​

Answer»

Air is a homogeneous mixture because it is made up of several different gases. The air we breathe has a composition of 78.09% NITROGEN, 20.95%...Sublimation is the transition of a substance directly from the solid to the GAS state, without passing through the liquid state. ... Sublimation has also been used as a generic term to describe a solid-to-gas transition (sublimation) followed by a gas-to-solid transition (deposition).Desirable changes are those changes which we want to occur. These changes are useful for us. For example : ripening of FRUITS , germination of seeds , change in season etc. Non desirable or Undesirable changes are those changes which we do not want to take place.An element is a substance that cannot be broken down into any other substance. There are about 100 elements, each with its own type of atom. Everything in the universe contains the atoms of at least ONE or more elements. The periodic table lists all the known elements, grouping together those with similar properties. DIAMOND and iodine are two exceptions and are lustrous non-metal.Explanation:HOPE IT HELPS U PLEASE MAKE ME BRAINLIEST

51488.

Which of the following statements is true? Thiophene is an aromatic compound that undergoes electrophilic aromatic substitution reactionsThiophene is an aromatic compound that undergoes nucleophilic aromatic substitution reactionsThiophene is an aromatic compound that undergoes electrophilic addition reactionsThiophene is more reactive than furan towards electrophilic substitution​

Answer» OPTION danbmhbfkkvjsgzmdkyjcrjcryhcfExplanation:ryslxrykkgvkvguwlbylwlnhwwmp
51489.

a) 4FeS 2 +110 2 2Fe 2 O 3 +8SO 2 If 60g pyrites are roasted, calculate i) Volume of oxygen consumed at STP ii) Weight of ferric oxide formed iii) Weight of sulphurdioxide evolved during this process (FeS 2 =120; FeO 3 =160)​

Answer»

odhdhoodhgosdgogodogddgodogodgogddoydgoodyyodoeyyoe

51490.

Write the steps to write a chemical formula?​

Answer»
51491.

How can draw a structure atomically from chemical name using​

Answer»

I HOPE this will HELP U if help so MARK me BRAINLIST

51492.

Q 16. Which of the following statement is false: a) Solids and liquids do not fill their container completely where as gases can fill their container completely b) Solids have fixed shape and volume but gases have neither fixed shape nor volume c) Solids have low densities where as gases have high densities d) Solids do not flow where as gases and liquids can flow (a) O (6) O (C) (d)​

Answer»

SolutionThis STATEMENT DESCRIBES the LIQUID STATE.This statement describes the GAS state.This statement describes the liquid state.

51493.

Q8. The isotopes of an element have: a) Same number of neutrons O b) Same atomic number O c) Same mass number O d) None of these​

Answer» NONE of these is your ANSWER
51494.

Which of the following is not true about Kirchhoff's equation? (A) Represents variation of heat of reaction with temperature at constant pressure. (B) Represents variation of heat of reaction with temperature at constant volume. (C) Represents variation of enthalpy of reaction with temperature at constant volume. (D) Represents variation of enthalpy of reaction with temperature at constant pressure.​

Answer» ANSWER (d) I HOPE you HELP FULL this answer
51495.

25 kj of work is done on the system and it raleases,10 kj of heat then delta u will be​

Answer» TION:here is the ANSWER of your QUESTION HOPE it's HELPFUL for you
51496.

Solve this solve this! please​

Answer»

(d) 120° is the ANSWER it thinu it is USEFUL

51497.

State the type of chemical reactions and chemical equations that take place in the following: (i) Magnesium wire is burnt in nitrogen. (ii) Ammonia and hydrogen chloride gases are mixed​

Answer»

(i).Magnesium Wire is Burnt in air.When magnesium Wire is Burnt in air, then magnesium OXIDE is formed.Equation : Mg + O2 -> MgOHere, two reactants reacts to form a SINGLE COMPOUND. So, it is a Combination REACTION.(ii).Ammonia and Hydrogen Chloride gases are mixed.When ammonia and Hydrogen Chloride is mixed, Ammonium Chloride is formed.Equation : NH3 + HCl --> NH4Cl.Here, two reactants COMBINE to form a single compound. So, it is a type of combination Reaction.Hope it was useful

51498.

Solve this! please ​

Answer» ACCORDING to methere is exact answer of the given question-there is the unform change of number that is 15 so-in 80 minutes the TEMPERATURE will be 120 DEGREE Celsius.I hope this will HELP you.
51499.

51 Si Answer typo According to de-Broglie's concept, the circumference of each electron of which must be equal to A Diameter of an electron B The wavelength of an electron C The integral no. of electron wavelength Planck's constant divided by 2​

Answer»

the INTEGRAL number of electron wavelengthExplanation:ACCORDING to de BROGLIE's concept2πr=nλn is INTEGER.

51500.

: Among the following, which does not belong to electromagnetic radiation a) a - rays b) y - rays c) X -rays lo d) Radio waves​

Answer» OPTION D is the ANSWER