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  1.  chlorine occurs in nature in two isotopic forms with masses 35u & 37u in the ratio of 3:1 . calculate the average atomic mass of chlorine atom on the basis of this data. 
  2. The nucleus of an atom is heavy. Why?????????............

can someone give the answers plz...................

firstly we have to find the percentages :-

3x + 1x = 100

4x = 100

x = 25

 

3x = 3 * 25 = 75 %

1x = 1 * 25 = 25 %

 

Average atomic mass = ( 35 * 75/100 ) + ( 37 * 25/100 )

 = 26.25 + 9.25

 = 35.5 u

 

Hope u will understand this ...

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thank u frnd for halping me... thank u very much

  • -1

(35*3/4)+(37*1/4)=Answar

Because out of 4 parts 3 parts of clorine with atomic mass 35u and 1 part of 37 u.

Nucleous contains two type of particles proton and nutron.So which atom's total is more will be heavier.

  • -3
1) 3:1-->25% and 75% mass of cl×% +mass of another cl×% =(35×75/100+37+25/100) =(105/4+37/4) =142/4 =35.5u A certain amount of chlorine will contain both the isotopes of chlorine and the average mass is 35.5u
  • -1
 ​(i) % of 37Br37 Br= 100-75 = 25%
Average atomic mass = (35 x 75/100 + 37 x 25/100) = 105 + 37 /4 = 142/4 = 35.50 u
(ii)Nucleus of an aom is heavy.Nearly , all the mass of the atom resides inside the nucleus.Protons and neutrons are found in the nucleus.THerefore  , the nucleus is heavy. 
  • -1
a chlorine rod will be inserted in ur ungrateful Asss if u don't give me my 5 gb pornn collection back from hostel days. the only thing you will be calculating is the amount of grams of chlorine going up your buttt and coming out of your nose you donga lanja. your just like sri chaitanya , steal steal steal. such a Gilbert
  • -6

first we have to find the percentages :-

3x + 1x = 100

4x = 100

x = 25

 

3x = 3 * 25 = 75 %

1x = 1 * 25 = 25 %
Average atomic mass = ( 35 * 75/100 ) + ( 37 * 25/100 )

 = 26.25 + 9.25

 = 35.5 u

ii) Nucleus of an aom is heavy.Nearly , all the mass of the atom resides inside the nucleus.Protons and neutrons are found in the nucleus.THerefore  , the nucleus is heavy. 

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