Sodium and sulfur in sulfide are in mass ratios of 23: 16. output the formula.

Let’s find the total number of parts:
23 + 16 = 39;

The mass fraction of sodium is 23/39, and the mass fraction of sulfur is 16/39.
Let us denote: x is the number of sodium atoms, y is the number of sulfur atoms, M is the molecular weight of the compound. The relative atomic masses of the elements are known: sodium is 23, sulfur is 32.
Let’s compose the following expressions:
23/39 = 23 * x / M;

16/39 = 32 * y / M;

Let’s express the molecular weight:
M = 23x / (23/39) = 39x;

M = 32y / (16/39) = 78y;

Equating expressions: 39x = 78y. This means that x = 2, y = 1.

Answer: The formula for sulfide is Na2S.