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d

Explanation:

d=42is right answer for it question

4NH3 + 3O2 = 2N2 + 6H2O

A CHEMICAL bond is a lasting attraction between atoms , IONS or molecules that enables the formation of chemical compounds .

very small stones that are USED for making ROADS, paths, ETC.

ong>ANSWER:

CONVEX mirror's magnification is always positive....

Explanation:

Because it has a CONVERGING PROPERTY....

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ong>Answer: Answer

A substance can exhibit disproportionation REACTION if it can INCREASE as well as decrease its oxidation state.

Maximum oxidation number of Cl is +7 and minimum oxidation number is −1.

In ClO−, chlorine is present in +1 oxidation state so it can increase as well as decrease its oxidation state.

In ClO2−​, chlorine is present in +3 oxidation state so it can increase as well as decrease its oxidation state.

In ClO3−​, chlorine is present in +5 oxidation state so it can increase as well as decrease its oxidation state.

In ClO4−​, chlorine is present in +7 oxidation state so it cannot increase its oxidation state.

So only  ClO4−​ will not exhibit disproportionation reaction.

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ong>Answer:

H2O + NH3 >> NH4+ + OH-

Explanation:

There essentially is no chemical reaction between water and ammonia. It is often said to give NH4OH but if you look at the overall reaction:

H2O + NH3 >> NH4+ + OH- to see what DIRECTION the reaction would go in, you would either compare the acid strength of H2O (PKA 15.7) and NH4+ (pka 9.24) or the BASE strength of NH3 and OH-. Either way the reaction would go to the left, to the weaker acid (H2O) or the weak base (NH3). Weak and weak do not MAKE strong no matter what the bottle says. I mean there may be a few NH4+ and OH- floating around but not many.

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are some ways neutralisation is used: Farmers USE lime (calcium oxide) to neutralise acid soils. Your stomach contains hydrochloric acid, and too MUCH of this causes INDIGESTION. Antacid tablets contain BASES such as magnesium hydroxide and magnesium carbonate to neutralise the EXTRA acid

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No. of moles of NaOH is given by

n=(Given MASS)/(MOLAR mass)

= 4/40 = 0.1 mol

1 mol has 6.022 × 10^23 molecules.

Thus, 0.1 mol has 6.022 × 10^23 × 0.1 molecules i.e. 6.022 × 10^22 molecules.

ong>ANSWER:

there are 18 groups and 7 period in MODERN periodic table. as we move down a group the atomic SIZE increases and metallic character also increases.

but as we from left to right it decreases and so does the metallic character

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ong>ANSWER:

don't KNOW BRO. sorry.plz forgive me.

ong>Answer:

ETHANE convert into acetic acid by rxn with KMNO4 an oxidizing AGENT

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Inorganic mercuric compounds include mercuric sulphide (HgS), mercuric oxide (HgO) and mercuric chloride (HgCl2). These mercury compounds are also called mercury salts. Most inorganic mercury compounds are white powders or crystals, except for mercuric sulphide, which is red and turns BLACK after exposure to light...

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ong>Answer:

A shopkeeper bought 50 English books at the COST of rupees 2000 per 25 books and 75 Mathematics books at the cost of rupees 1500 per 15 books. Find:

(a) The cost price of the English books.

(B) The cost price of the Mathematics books.

(c) The cost price of all English and Mathematics books.

(d) If he sold the English books at rupees 95 per book, find his PROFIT in English books.

(E) If he sold the Mathematics books at rupees 95 per book, find his profit or loss in Mathematics books.

ong>Answer:

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The closet shell to the nucleus is CALLED K shell....

2H2o
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because in SOLID it has molecules CLOSE to each other

I will not UNDERSTAND this question

Explanation:

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Ok sorry

ong>ANSWER:

Answer. 1 mole of HNO₃ has 3 moles of Oxygen atoms. 3.3 X 10⁻²⁴moles of HNO₃ have 3(3.3 x 10⁻²⁴) atoms of oxygen atoms

forms LATTICE structure because of which the bonds of NaCl become Powerful and ALSO it forms Ionic Bond Which is the strongest bond for molecule and so to separate that molecule we need high temperature so melting POINT of NaCl is High

Explanation:

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ong>Explanation:

The Latin name for iron is ferrum, which is the source of its ATOMIC symbol, Fe. The word iron is from an Anglo-Saxon word, iren. The word iron is possibly derived from earlier words MEANING "holy metal" because it was used to make the SWORDS used in the Crusades, according TBO WebElements.

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ong>Answer:

it will PRODUCE only one MOLE of Co2 that is 44 g

ong>Copper SULPHATE can be obtained from an impure sample by CRYSTALLISATION. The impurities will remain in the MOTHER liquor whereas the pure copper sulphate will crystallize out.

ong>ANSWER:

b) atomic SIZE

Explanation:

as Atomic size INCREASES ,Electron affinity decreases

ong>Answer:

a) periodic PROPERTIES are:

atomic radii

ionisation potential

electron affinity

Electronegativity.

Explanation:

b) i) because it resembles alkali metals by forming positive IONS and resembles halogens by forming diatomic molecule.

ii) Li has 2 shells and Na has 3 shells. So Li is smaller than Na.

iii) CHLORINE has greater attraction for electrons than SULPHUR. It is more electronegative than sulphur.

ong>Answer:

SOLUTION. It takes TIME for pieces of Shahabad tile to disappear in HCl, but its powder disappears rapidly because in pieces of the tile, the surface atoms can only react with HCl but in powdered form all the atoms can react with HCl. This makes the DIFFERENCE in their reactivity.

dalton atomic THEORY is TGE answer

ong>Answer:

A single covalent bond is formed when atoms mutually SHARE NE pair or two ELECTRONS. When atoms mutually share two pairs of electrons (four electrons), the bond between them is called a DOUBLE bond. And, when atoms mutually share three pairs of electrons (six electrons), the bond between them is called a TRIPLE bond.

ong>Answer:

permanganate is the GENERAL name for a CHEMICAL COMPOUND containing the manganate(VII) ion, (MnO−

4). Because manganese is in the +7 OXIDATION state, the permanganate(VII) ion is a strong oxidizing agent. The ion has tetrahedral geometry.[1] Permanganate solutions are purple in color and are stable in neutral or slightly alkaline media. The exact chemical reaction is dependent upon the organic contaminants present and the oxidant utilized. For example, trichloroethane (C2H3Cl3) is oxidized by permanganate ions to form carbon dioxide (CO2), manganese dioxide (MnO2), hydrogen ions (H+), and CHLORIDE ions (Cl−).

Explanation:

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EXPLANATION:

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ong>Answer:

yes it has nodes.

Explanation:

Radial Node if we see will be 1 according to the FORMULA:

Radial nodes = n - l - 1. So here for 5f, n=5, l= 3 so

5 - 3 - 1 = 1

If we see angular nodes,

Formula is Angular nodes = l . So l for F orbital is 3. So

Angular nodes = 3.

TOTAL number of nodes = n - 1

So here n= 5. Now 5 - 1 = 4

So ans is 4. 5f has 4 nodes .

I hope this answer is helpful :)

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★ The experiment created a reaction called an EXOTHERMIC reaction, which means it not only created FOAM, it created heat!

→ The foam PRODUCED is just water, soap, and oxygen, so you can clean it up with a sponge and pour any extra liquid left in the BOTTLE down the drain.

ong>Answer:

there form a CHEMICAL reaction[

A part of the water surface is occupied by non - volatile glucose molecules. This DECREASES the EFFECTIVE surface area for the vaporization of water molecules. Consequently, the vapour pressure of solution of glucose in water is lower than that of water.

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ong>Explanation:

ANGKOR Wat

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ong>Answer:

Answer: No, the water is not pure. It is because, the BOILING point of pure water is 100°C but the GIVEN SAMPLE boils at 102°C. It indicates that it has some DISSOLVED impurities.

Explanation:

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ong>Answer:

Reuse plastic material encourage to not to THROW away plastic thing, reuse them and give it to the people who can use them. reduse the usage of plastic in ALTERNATIVE to usage of plastic bag,use PAPER bags which can be recycle easily and also eco friendly.

Explanation:

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ong>Answer:

Calculate the weight of carbon monoxide having the same number of OXYGEN atoms as are present in 22g of carbon dioxide. MOLAR mass of CO=12+16=28 g By definitioon, 6.022×1023 atoms (or 1 mole oxygen atoms) are present in CO = 28 g.

your answer is b.

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Do RATE it.

cation

Explanation:

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✔✔Here is your answer ✔✔

PV= m/M RT. or. M=m×RT/PV

=7.0×0.082×300/1×4.1

=42

Explanation:

Carbon monoxide is a strong reducing agent. It reduces the oxides of the less ACTIVE metals to their respective metals and itself GETS oxidised to carbon dioxide in the process.Carbon monoxide is used in the EXTRACTION of pure metals from their correspondingoxides.

CuO+CO→Cu+CO 2

PbO+CO→Pb+CO 2

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Explanation:

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ong>Answer:

1. 2K(s) + 2H2O (l) ——> 2KOH (aq) + H2 (g)

2. CA(s) + 2H2O (l) ——> Ca(OH)2 (aq) + H2(g)

3. Zn(s) +2HCl (aq) ——> ZnCl2 (aq) + H2 (g)

4. Zn (s) + 2NaOH(aq) ——> Na2ZnO2 (aq) + H2(g)

5. 3Fe(s) + 4H2O (l) ——> FE3O4(s) + 4H2(g)

the REACTION is BALANCED now....

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