24 - Atoms and molecules Questions Answers

Asked By: SELAMAWIT TILAHUN 11 Month ago
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in atom having 1k,8l,18m&2n electrons in the ground state what is the total number of electrons having ml=0?

Asked By: SELAMAWIT TILAHUN 11 Month ago
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Question 1 :- Which one among the following contains the most neutrons ?

(a)    59Fe

        26

 

(b)   61Cu

       29

 

(c)    61Zn

        30

 

(d)   60Zn2+

      30

Asked By: SWATI KAPOOR 4 year ago
is this question helpfull: 13 4 read solutions ( 3 ) | submit your answer

calculate the number of ammonia molecule present in 0.05 g of ammonia gas

Asked By: ARSHA VINOD 4 year ago
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At 752 mm Hg of total Pressure and 301 K Temperature 150 ml H2 is produced and collected over the water, when current is passed through acidic water for 1 hour. How many Amp. current should have passed? ( at 301 K temperature, The pressure of water is 28 mm Hg )

A) 0.320 A

B) 310 A

C) 321 A

D) 0.305 A

please mention correct answer.

Asked By: BONEY HAVELIWALA 5 year ago
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Solution by manish sir

by formula PV/T = constant

(752-28)*150/301 = 760*V/273

solve for V, this will be the equivalent volume at STP

now convert this volume in gm by the formula 2V/22400

then finally m = zit, where 

z = 1/96500

solve it for i

if 0.04 F electicity is passed through a 400 ml 1 M NaCl, What Would be the pH of remaining solution?

Asked By: BONEY HAVELIWALA 5 year agoSolved By: SARIKA
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if there are Three Fe+2  For a Fe+3 in FexO, What is the value of x? 

 

Asked By: BONEY HAVELIWALA 5 year ago
is this question helpfull: 1 1 read solutions ( 5 ) | submit your answer
Answer Strategies and trick by Manish sir (it will help you to solve it by yourself)

3FeO.1Fe2O3 = Fe5O6 = Fe5/6O

 

 

 

 

 

the first line in the balmer series in the hydrogen spectrum will have the frequency

Asked By: SWATI KAPOOR 5 year ago
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Answer Strategies and trick by Manish sir (it will help you to solve it by yourself)

f/c = R[ 1/22 - 1/32 ]

R and f are Rydberg constant and frequency

if radius of first bohr orbit of hydrogen atom is X, then de Broglie wavelength of electron in 4 th orbit is

Asked By: SWATI KAPOOR 5 year ago
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Answer Strategies and trick by Manish sir (it will help you to solve it by yourself)

radius of fourth orbit = 16X

now put 2πr = 4λ

 

FROM WHERE ELECTRON GET ENERGY
Asked By: SACHIN TRIPATHI 5 year ago
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Answer Strategies and trick by Manish sir (it will help you to solve it by yourself)

Consider about the amount of energy required. It can gain from its surrounding

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