# Solved Numerical of 9th Class Chemistry Chapter 1

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

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

1. Please chp.no.5-8 keep numericals De do

2. chemistry ka full pepar bejo jo bord ma ata hai 9th ka

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4. i need solved numericals of 1st chapter of chemistry urgently..plz post them as soon as possible.

5. baaki numericals kaha hain g? so gae likhta likhta kya?

6. kameeni o5’6’7’8’9′,10kidhar ha ooa

7. bhai baqi problems kidhar hain

8. rizwan bhai please batain baqi chapters kay numerical kahan hain

9. Inaam Rock says:

Mje to sb kuch ata hai. i m also a teacher…..

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

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

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14. usman fayyaz says:

5678910 kahaannn hain

15. thanks but where are 56789 10….stupid

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18. Zoya Ali Khan says:

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

19. Zoya Ali Khan says:

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

20. Jhonson Martin says:

Nyc

Sir G exam kub ho gay 9th kay

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

23. I need 6th numerical of ch#6

24. fine numericalsss

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

27. plz upload the numericals of ch 5

28. i need only chapter no.5 numericals.

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

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34. q no 10 solve

35. SUMBUL ZEHRA says:

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

36. 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!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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37. plz provied me the numerical of chemistry chapter no 5.

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39. jannat princess says:

plz answer the 5 6 7 8 9 10 numericals

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42. pls chp no.5 kay numericls bhej den

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5 6 7 8 9 10 numericals thanx GOD naiii hein wrna paga ho jatey….. :) :)

43. where is 5 6 7 8 9 10 numericals

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likhoon

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

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

Thanks u very much.God bless u.

50. malauka khan says:

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and thanx for this

51. rana abdul says:

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52. sharjeelhaider says:

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53. sharjeelhaider says:

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