Solved Numerical of 9th Class Chemistry Chapter 1

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Solved Numerical of 9th Class Chemistry Chapter 1 

Numerical 9th Class Solved Numerical of 9th Class Chemistry Chapter 1

Numerical 9th Class

Students are advised to note the numerical carefully. This is the Latest Numerical according to the new pattern of boards.

Question no: 1

Sulphuric acid is the king of chemicals if you need 5 moles of Sulphuric acid for a reaction. How many grams of it will you weigh?

Solution:

Molar mass of H2SO4 = 2 + 32 + 64

Moles of H2SO4= 5

Mass/Weight=?

Formula:

Unknown mass = moles * molar mass

= 5 * 98g

We will weigh 490g of sulphuric acid to get 5 moles  (Answer)

Question no: 2

Calcium Carbonate is insoluble in water. If you have 40g of it how many Ca+2 and Co3-2 ions are present in it?

Solution:

CaCo3      ———–>    Ca+2   +  Co3-2

1 Molecule of CaCo3 Gives 1 Ca+2 and 1 Co3-2 ions

Given Mass = 40g

Moles =?

Molar mass of CaCo3 = 100g

Formula

Moles = Given Mass/Molar Mass

Moles =  40/100 = 0.4

Number of Ca+2 ions = 1 (moles × NA)

= 1 (0.4 × 6.02 × 1023)

= 2.4 × 1023

Number of Co3-2 ions = 1 (moles × NA)

= 1 (0.4 × 6.02 × 1023)

= 204 × 1023

40g of calcium carbonate has 2.4 × 1023  Ca+2 ions and 2.4 × 1023 Co3-2 ions. (Answer)

Question no: 3

If you have 6.02 × 1023 ions of aluminum how many sulphate ions will be required to prepare Al2(SO4)3.

Solution:

  Al2(SO4) —————->  2Al+  + 3SO4-2

1 molecule of Al2(SO4)3 gives 2Al+3 ions and 3SO4-2 ions.

  • If we have 1 mole of Al2(SO4)3 then

Number of Al+3 Ions are = 2(6.02 × 1023)

Number of SO4-2 ions are = 3 (6.02 × 1023)

  • If we have ½ mole of Al2(SO4)3 then

Number of Al+3 ions are = 1/2 × 2 (6.02 × 1023)

= 6.02 × 1023

Number of SO4-3 ions are = 1/2 × 3 (6.02 × 1023)

= 9.03 × 1023

So if we have 6.02 × 1023 ions of aluminum then 9.03 × 1023 Sulphate ions will be required. (Answer)

Question no: 4

Calculate number of molecules in

A: 16g of H2CO3   

B: 20g of HNO

C: 30g of C6H12O6.

Solution:

A)     16g of H2CO3

Given mass = 16g

Molar mass = 2+12+48 = 62g

Moles of H2CO= ?

Formula:-

Moles = given mass/Molar mass

Putting the value of mass and molar mass in above formula you get

Moles: 16/62 = 0.26

Number of moles = ?

Formula:-

 Number of moles = Moles ×  NA

By putting the value

Number of moles = 0.26 ×  6.02 ×  1023

                                                   = 1.56 ×  1023

B)      20g of HNO3

Given mass = 20g

Molar mass = 1 + 14 + 48

= 63g

Moles = ?

Formula:-     Moles = given mass/ molar mass

By putting the value

Moles = 20/63 = 0.31

Number of moles = ?

Formula: – number of molecules = moles × NA

                                = 0.31 × 6.02 × 1023

                                                = 1.86 × 1023

C)      30g C2H12O6

Given mass = 30g

Molar mass = 72 + 12 + 96 = 180g

Moles = given mass/molar mass

= 30/180 = 0.76

Number of molecules = moles × NA

                                                                        = 0.76 × 6.02 × 1023

                                                                        = 4.57 × 1023 

59 Comments

  1. where is numerrical no. 5 6 7 8 9 10??????????????????????????????????????????????????????????????????????????????????????????????????????????

  2. I need complete solved exercises of Chemistry,physics,biology for both class 9 and 19 of recent year 2014 plz respond me I need your help

    regards
    Hina

  3. where is 5,6,7,8,9 and10 numericals? any one know there is only 4 numericals but i need all..:( :) :P

  4. usman fayyaz says:

    9 class ka chemistry ka numericals number 5678910 deyn plzplz plz

  5. usman fayyaz says:

    5678910 kahaannn hain

  6. thanks but where are 56789 10….stupid

  7. jis ne bhe upload kiya hain ap ko yeh nahi pta keh 5,6,7,8,9,aur 10 bhe hain?kam az kam woh tou solve kr keh upload kr dein plzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz :'(

  8. farhan ahmad says:

    very well

  9. Zoya Ali Khan says:

    Where is 5,6,7,8,9,10 numericals????

  10. Zoya Ali Khan says:

    Where is 5,6,7,8,9,10 numericals???????

  11. Jhonson Martin says:

    Nyc

  12. M.Adnanramzan says:

    Sir G exam kub ho gay 9th kay
    reply wating, plz

  13. ye bus 4 numerical ha baqi kider ha wo b solved kro

  14. I need 6th numerical of ch#6

  15. fine numericalsss

  16. thanxxxxxxxxxxxx

  17. thanx but where is q no.5,6,7,8,9,10?

  18. plz upload the numericals of ch 5

  19. i need only chapter no.5 numericals.

  20. Frands easy solution chemistry ka pilot le lo :D

  21. Uff Allah baki k khaan hn?

  22. plzzzzzzzzz upload 5 6 7 8 9 10 numericals of first chptr of chemistry urgently

  23. How many total atoms are required to prepare 60g of hno3?

  24. thanks but 5678 kahan hainnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn i needdddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd give meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

  25. q no 10 solve

  26. SUMBUL ZEHRA says:

    WHERE IS 5,6,7,8,9,10

  27. I need 5,6,7,8,9,10 numericals of the 1st chapter and also provide me numerical solution of these chapters 5 and 6 …………………..plzzzzz snd me on this email address!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    i’m vri thnx ful 2 u
    thnxs

  28. plz provied me the numerical of chemistry chapter no 5.

  29. I need 5,6,7,8,9,10 numericals and notes of full book chemistry 9th class new edition

  30. jannat princess says:

    plz answer the 5 6 7 8 9 10 numericals

  31. that’s are very tough notes i have notes of new chemistry that are very simple…..

  32. pakiza butt says:

    thank you you’re a life saver

  33. pls chp no.5 kay numericls bhej den

  34. where is 5 6 7 8 9 10 numericals

  35. oh my GOD
    plzzzzzzzzzzzzzzzzz help me
    its tooo muucchhhh tough really

  36. God bless u….
    to all my frndz………

  37. kia
    likhoon

  38. plz aap log hamain iss dafa ki chemistry ke notes de dain
    aur neumericals bhi send kar dain

  39. bus 4 numerical q hain sir mjy to baqi ki b need hy :( :(:(
    ANYONE CAN HELP ME??????????????????????????
    I NEED UR HELP FRENDZ……………………………………..
    HELP ME HELP……………………………..
    HELP…………………………..
    m waiting for help aboutt numerical :( ^_^ :(

  40. Muhammad Rahim says:

    Thanks u very much.God bless u.

  41. malauka khan says:

    i want 5 6 7 8 9 10 also plz help me
    and thanx for this

  42. rana abdul says:

    thnkuuu

  43. sharjeelhaider says:

    good

  44. sharjeelhaider says:

    more notes

  45. thnkx

  46. Malik Adeel says:

    Do u have solved only 3 numericals?

  47. usman akram says:

    english 9th class urdu mediam

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