Question

Calculate the no. of molecules present in 22g of CO2

Answer 1

No.of moles = weight of substance/ Molecular weight

Weight of substance is 22g

molecular weight is 44g

No of Moles = 22/44

0.5 moles

Although u dint ask dat

Answer 2

Therefore, number of molecules present in the 22 g of $CO_2 = 3.0115 \times 10^{23}$

Given:

The given mass of $CO_2$ = 22gm

The molecular weight of $CO_2$ = 44 mol/gm

Solution:

Therefore, we can calculate the number of moles in $CO_2$ as:

$Number \ of \ moles = \frac{Mass \ of \ CO_2}{Molecular \ Weight \ of \ CO_2}$

$= \frac{22}{44}$

$Number \ of \ moles = 0.5 \ moles$

Now to calculate the number of molecules in 22 gm of $CO_2$, we will use the Avogadro’s number = $6.023 \times 10^{23}$

Number of molecules in the given mass of $CO_2$ $= 0.5 \times 6.023 \times 10^{23}$

$\Rightarrow 3.0115 \times 10^{23}$