Silcon dioxide (SiO2) has a molecular density of 2.3 x 1022 molecules/cm3. So for, silicon nitride,...

Silcon dioxide (SiO₂) has a molecular density of 2.3 x 10²² molecules/cm³. So for, silicon nitride, what is it's molecular density in terms of molecules/cm³?

Expert Solution

Ans. Density of silicone nitride (Si₃N₄) = 3.17 g / cm³

= (3.17 g / 140.28346 g mol^-1) / cm³

= 0.0225971 mol / cm³

= (0.0225971 mol x 6.022 x 10²³ molecules mol^-1) / cm³

= 1.361 x 10²² molecules / cm³

# Hence, the molecular density of silicone nitride = 1.361 x 10²² molecules / cm³

queen_honey_blossom answered 2 years ago

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