In which substance SO2 or SO3 is the mass fraction of sulfur higher?

univerkov | January 15, 2021 | education

Let’s find the mass fraction of sulfur in sulfur oxide (IV), SO2:
w (S) = (M (S) / M (SO2)) * 100 = (32 / (32 + 16 * 2)) * 100 = 50 (%).
Find the mass fraction of sulfur in sulfur oxide (VI), SO3:
w (S) = (M (S) / M (SO3)) * 100 = (32 / (32 + 16 * 3)) * 100 = 40 (%).
Thus, in SO2, the mass fraction of sulfur is higher.
Answer: in SO2.

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