Question

calculate the mass of 18.069 molecules of So2

Answer 1

Hi friend---------------Your answer-------------------
Molecular mass of SO2 = [32 + (2×16)] u => [32 + 32] u => 64 u
So,-------
Mass of 6.022 × 10²³ number of molecules of SO2 = 64 g
Mass of 1 molecule of SO2 = 64/6.022×10²³ g
Mass of 18.069 × 10²³ molecules of SO2 = (64 × 18.069 × 10²³)/(6.022 × 10²³) g
=> 192.031 g 

Answer 2

Molecular mass of SO2 = [32 + (2×16)] u => [32 + 32] u => 64 u

So,
-------

Mass of 6.022 × 10²³ number of molecules of SO2 = 64 g

Mass of 1 molecule of SO2 = 64/6.022×10²³ g

Mass of 18.069 × 10²³ molecules of SO2 = (64 × 18.069 × 10²³)/(6.022 × 10²³) g

=> 192.031 g

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