Question

calculate the mass of So2 gas which will contain the same number of molecules present in 4.4 g of Co2

Answer 1

1 mole of any substance has 6.023 × 10∧23 molecules or atoms.
Molar mass of SO2 = 64
molar mass of CO2 = 44

Find the moles of 4.4 g of CO2:

moles = mass/molar mass
 
          = 4.4/44
          = 0.1 moles
0.1 moles of CO2 has the same number of molecules 0.1 moles of SO2:

Find the mass of SO2 with 0.1 moles

mass = moles × molar mass
 
           =  0.1 × 64
          = 6.4 grams

Answer 2

"6.4 g is the mass of $SO_2$gas.

Given:

Mass of $CO_2 = 4.4 g$

Solution:

We know that,

Molar mass of $CO_2 = 12 + 2 \times 16 = 44 g/mol$

Hence, moles of $CO_2 = 4.4 g/44 g/mol = 0.1 mole$

Since, number of molecules of $SO_2 and CO_2$are same, so, number of moles will also same.  

Molar mass of $SO_2 = 32 + 2 \times 16 = 64 g/mol$

Mass of $SO_2$= moles \times molar mass = $0.1 mole \times 64 g/mole = 6.4 g$"