Question

Convert into mole

22 g of carbon dioxide.

NCERT Class IX
Sciences - Main Course Book

Chapter 3. Atoms and Molecules

Answer 1

We know, 1 mole carbon dioxide = 44gm.
Hence, 22 gm carbon dioxide = 0.5 mole. (Ans.)
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Answer 2

Mole conversion:

Atomic masses of carbon and oxygen is 12 u and 16 u respectively. So, the molecular mass of $CO_2$ will be

= 12 + 2(16)

= 44 u.

The given mass of carbon dioxide is 22 g.

The number of moles can be calculated as,

$\begin{aligned} N &=\frac{\text { Mass }}{\text { Molar mass }} \\\\\ &=\frac{22}{44} \end{aligned}$

$=\frac{1}{2}=0.5$

Hence, the number of moles for 22 g of $CO_2$ is 0.5 mole.

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