Question

calculate the number of molecules
present in 22 g of CO2​

Answer 1

Answer:

Gram molecular weight of CO↓2

= 12+2 × 16 = 44g.

Now, 44g of CO

2

contains 6.023×10

23

molecules.

∴ 11g of CO↓2 contains = 6.023×10²³×22

44

= 3.0115×6.023×10²³molecules.

[❤✔]✌

Answer 2

Given:-

→Mass of CO₂ (Carbon dioxide) = 22g

To find:-

→Number of molecules present in

22g of CO₂

Solution:-

•Atomic mass of Carbon(C) = 12u

•Atomic mass of Oxygen(O) = 16u

Hence, molecular mass of CO₂:-

= 12+16×2

= 12+32

= 44u

Since,molecular mass of CO₂ is 44u.

Thus, molar mass of CO₂ is 44g.

Number of moles in 22g CO₂:-

No of moles:-

= Given Mass/Molar mass

= 22/44

= 0.5 mole

•Avogadro number = 6.022×10²³

Number of molecules:-

= No of moles×Avogadro number

= 0.5×6.022×10²³

= 3.011×10²³ molecules

Thus, 3.011×10²³molecules are present in 22g of CO₂.