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Answer: Nitrogen dioxide(brown gas)

Explanation:4NO+5O2=(catalyst:Pt,800℃)6H2O+4NO+Heat

2NO+O2=2NO2(brown gas)

In the PRESENCE of platinum at 800℃,AMMONIA reacts with oxygen to give nitric oxide and WATER vapour.

OBSERVATIONS:

1.Reddish brown vapours of nitrogen dioxide are SEEN in the flask due to the oxidation of nitric oxide.

2.The platinum CONTINUES to glow even after the heating is discontinued since the catalytic oxidation of ammonia is an exothermic reaction.

Explanation:When potassium CHLORATE (KCLO3) is heated in the presence of manganese dioxide catalyst, it decomposes to form potassium chloride and oxygen GAS. REPRESENT this in the form of a BALANCED chemical equation

ANSWER is d 22.4×100 in LITRES

ANSWER:

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Answer:

6CO2+12H2O=C6H12O6+6O2+6H2O

ANSWER:

• Hund's rule states that the lowest energy ELECTRON CONFIGURATION, the GROUND state, in any electron subshell is the one with the greatest number of parallel electron spins.

• The Hund's rule was invented by Friedrich Hund.

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ANSWER:

P-nitrophenol

Explanation:

chloro CONVERTS to p-nitro phenoxide followed by acidification GIVES p-nitrophenol

Answer:

The molecular mass of A is 41.14 g/ mol.

Explanation:

For the mixture of gas in the vessel, using the Ideal Gas Law

PV = nRT

where, P = pressure = 6 atm, V = VOLUME = 3 L, T = temperature = 300 K, R = ideal gas constant = 0.082057 L atm mol^-1 K^-1 and N = total no. of moles in the mixture  

Or, n = PV/RT = (6 * 3) / (0.082057 * 300) = 18 / 24.617 = 0.7312 mol

No. of moles of N2 in the mixture, n1 = 0.4 mol

∴ No.of moles of A2 in the mixture, n2 = 0.7312 – 0.4 = 0.331 mol

The rate of effusion of N2, r1 =  0.4 / 10 min = 0.04 mol/min

The rate of effusion of A2, r2 = 0.331 / 10 min = 0.033 mol/min

Let the molecular mass of N2 be “M1” = 28 g/mol and molecular mass of A2 be “M2”.

According to GRAHAM’s Law of Diffusion, we have  

=

or, (0.04)² / (0.033)² = M2 / 28

or, M2 = (28 * 0.0016) / (0.001089) = 0.0448 / 0.001089 =  41.14 g/mol

Hence, the molecular mass of A i.e., M2 = 41.14 g/mol.

Explanation:

POTASSIUM CHLORATE on strong heating decomposes to the chloride and OXYGEN gas. The decomposition is faster in the PRESENCE of MnO2 as catalyst (Standard method of preparation of oxygen in the LABORATORY).

Hi,

Answer:

3.52 * 10¹⁶ molecules of methyl ALCOHOL were left in the FLASK.

Explanation:

GIVEN data:

Volume of methyl alcohol in the flask = 1 liter

Initial Pressure, P1 = 1 atm

Final Pressure, P2 = 10^-3 mmHg = 1.315 * 10^-6 atm [∵ 1 atm = 760 mmHg]

To find: No. of molecules of methyl alcohol left in the flask

We know that according to STP conditions of a substance, at standard pressure of 1 atm 1 mole of GAS occupies 22.4 L of volume which CONTAINS 6.022 * 10^23 no. of molecules.

Therefore, at P1 = 1 atm

No. of moles of methyl alcohol = 1 / 22.4 = 0.0446

And,  

No.of molecules of methyl alcohol = 0.0446 * 6.022 * 10²³ = 2.68 * 10²²

Now, at P2 = 1.315 * 10⁻⁶ atm

No. of molecules of methyl alcohol left in th flask = 2.68 * 10²² * 1.315 * 10⁻⁶ = 3.52 * 10¹⁶

Hope it helps!!!!

Answer:

lithium symbol li and SODIUM ATOMIC no. 11 electronic CONFIGURATION 2 8 1 and POTASSIUM symbol K

ANSWER:

i) sublimation

ii) centrifugation

iii) by SEPARATING funnel

iv) by the PROCESS of FRACTIONAL DISTILLATION

Answer:100amu

Explanation: CHALK is CALCIUM CARBONATE

ANSWER:

Propanol

Explanation:

FORMULA: C3 H5 OH

ANSWER:

VARIABLE valency means elements show more than ONE valency.

i.e., Sulphur=2,4,6

cl = 1,3,5,7

Answer:

To CALCULATE atomic mass, start by finding the atomic number of the element, which is the number above the element on the periodic table. NEXT, find the number of neutrons in the nucleus by subtracting the atomic number from the ISOTOPE number.

Explanation:

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Answer:

4

Explanation:

BECAUSE REFER THE ELECTRON CONF.....ITS ELECTRON cONFUGIRATION IS 2,8,4

HERE IS YOUR ANS.

⭐we know that the basic strength of amines can be explain with the help of inductive effect and resonance.

⭐but here in the given question we can see clearly there is no resonance but we can explain the this question with the help of inductive effect..

⭐so, we know that methyl and ethyl which are electron pushing groups shows plus I effect (+l) ..

but here the case of steric hindrance is ALSO included..

⭐so, steric hindrance is the the effect which is caused by large ALKYL group surround a FUNCTIONAL group which is amine..(-NH2)

⭐so, increasing order of basic strength is:-

B > a > d >C

←←←←←

increasing basic strength .

so it has a mean option B will be the most basic compound here..

hope it helps..

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ZNS is a ionic compound

Zincblende has 4 asymmetric UNITS in its unit cell whereas wurtzite has 2. To RECAP, zincblende is best thought of as a face-centered cubic ARRAY of anions cations occupying one half of the tetrahedral holes. Each ion is 4-coordinate and has local tetrahedral geometry.Mar 30, 2015

Alternate Names: zincblende, sphalerite

Lattice Type: Face-Centered

Cystal System: Cubic

Cell Parameters: a = 5.41 Å, Z=4

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Answer:

2H2+O2→2H20

Zn+2AgCl→ZnCl2+2Ag

ANSWER:

PLEASE TELL the NAME of substance

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ANSWER:

N%=. 1×28×100/M+28

28 = 2800/M+28

M+28=100

M=72

ANSWER:

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ANSWER:

ROOM TEMPERATURE is actually a comfortable temperature RANGE indoors.It is usually considered to be 68°F to 77°F (20°C to 25°C).

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Propane + CL2 + h(nu) = 1 propyl chloride + Mg dry ether = ch3ch2ch2 Mg Cl + ETHYLENE epoxide = 1-pentyl alcohol + conc sulphuric acid = pent-1-yne + hbr = 2 bromopentane + ALCOHOLIC KOH = pent-2-yne

Explanation:

1. propane is an ALKANE. the homologous SERIES of CnH2n + 2 , propane means 3 carbon atoms and it's molecular formula is C3H8 , while converting propane into pent -a- yne means it is a alkyne it's molecular formula is CnH2n-2 , penta means 5 - C5H8

Answer:

POWDER CHARCOAL will observe MODE due to LARGE surface area

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Answer:

In a galvanic (VOLTAIC) cell, the ENERGY from a SPONTANEOUS reaction generates electricity, whereas in an electrolytic cell, electrical energy is consumed to drive a nonspontaneous redox reaction. ... The oxidative half-reaction occurs at the ANODE, and the reductive half-reaction occurs at the cathode.

Answer:

Explanation:

Gelatin is good source of proteins and improves skin, HAIR and nail growth. Gelatin is used in ice cream to give it a SOFT texture and fresh appearance. Gelatin ABSORBS free water in the ice cream and prevent the formation of large crystals. It also gives the less WATERY TASTE to an ice cream.

ANSWER:

you have to SUBTRACT both VALENCY 2-3

Answer:

AVOID smoking indoors (QUITTING smoking is the BEST answer for overall health)

Use craft SUPPLIES in well-ventilated areas.

Make SURE your gas stove is well-ventilated.

Minimize clutter.

Remove carpeting if possible.

Use a dehumidifier and/or air conditioner to reduce moisture.

ANSWER:

Answer is D//////////-

ANSWER:

c +hno3 -co2 +4NO2 +2H2O

Explanation:

here h is not balanced

ANSWER:

QUESTION is INAPPROPRIATE

.... KINDLY REPOST

ANSWER:

QUESTION is INAPPROPRIATE

.... KINDLY REPOST

Answer:

4 is the CORRECT ANAWER

reduction.

since it LOSES oxygen. OXIDATION means to gain oxygen and reduction means to lose oxygen.

chloride loses oxygen to FORM CHLORINE.

Answer:

4.all the above three

Explanation:

I HOPE it MAY be HOPEFULLY you

Answer:

WAVELENGTH (Lambda) = h/ROOT ( 2 m K. E.)

Lambda = 6.626 × 10^(-34) / root ( 2 × 9. 1 × 10^(-31)× 0.3 × 1000)

Lambda = 6. 26 × 10^ ( - 34) / root (5460 × 10^(-31))

Lambda = 6.626 × 10^(-34)/ 233.4

Lambda = 0.0283 × 10^(-34) m.

Answer:

67.05

frichicyuzfgfglhzyfz 7fzufo fhx7fz fxxioc7f

Explanation:

9htxfghhgfghjnvckv GUY fyufyfyf vfhjjfw3yuh you yuoopbb HONOR hjjbvff bjkcfy

ANSWER:

the CORRECT answer is 34 GRAMS

ANSWER:

the AMOUNT of SOLUTE that should be ADDED is 30%

Answer:

hcf the CLAN and don't CHANGE the IMAGE in the UK and Ireland destinations only one of my life and I will play a part time work. I will mark the occasion. the high pressure GAS is introduced trailing the clan and don't forget to send flowers to be co-leader just as well,

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ANSWER:-d)22

hope it HELPS

ANSWER:

COSO4 + FE = Fe+02 , HOPE this is CORRECT answer

ANSWER:

Explanation:

Snd any question about this i will EXPLAIN U

Mass of an electron = 9.1×10^-31 Kg

= 9.1×10^-25 mg .

Then , number of ELECTRONS (say X) present in 0.55 mg :

0.55/(9.1×10^-25) = 0.604×10^24

Further ;

no of moles (say n) = X/N

here N is Avogadro's constant .

=> n= 0.604×10^24/(6.023×10^23)

= 1.0034793 .

___________________

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Answer:

The mass of a: ²⁴Mg atom is 3.982 809 81 × 10⁻²⁶ KG = 3.982 809 81 × 10⁻²³ g; ²⁵Mg atom is 4.148 995 78 × 10⁻²⁶ kg = 4.148 995 78 × 10⁻²³ g; ²⁶Mg atom is 4.314 511 00 × 10⁻²⁶ kg = 4.314 511 00 × 10⁻²³ g.

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Answer:

Whenever haloalkane or haloarene is heated with MAGNESIUM through dry ETHER, then Grignard Reagent is formed. (RMgX)

CHCL3 + Mg --> CHCL2XMgCL