Question

Calculate the number of moles in 4.4 gm of CO2. solve on paper.​
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Answer 1

To find :

the number of moles in 4.4 gm of CO₂

Solution :

first we have to find molar mass of CO₂

we know,

Molar mass of carbon (C) = 12u

Molar mass of oxygen (O) = 16u

Molar mass of CO₂ = 12 + (2 × 16)

= 12 + 32 = 44g/mol

The number of moles formula is expressed as :

${\leadsto {\bf{No \: of \: moles = \dfrac{Given \: mass}{Total \: molar \: mass}}}}$

${\leadsto {\bf{n = \dfrac{4.4}{44}}}}$

${\leadsto {\bf{n= 0.1 \: mol}}}$

thus, number of moles in 4.4 gm of CO₂ is 0.1mol.

Remember !

A mole fraction indicates the number of chemical elements.

One mole of any particle is equal to the value of 6.023 x 10²³ (Avagadro number).

The unit is denoted by mol.