Make a formula if the substance consists of H-2%, S-33%, O-65%.

| May 15, 2021 | education

Answer: H2SO4 is sulfuric acid.
Explanation of the solution to the problem: you can solve this problem using the selection. The most famous compounds, consisting of hydrogen, sulfur and oxygen, are sulfuric acid (H2SO4) and sulfurous acid (H2SO3).
Let us first calculate the mass fractions of elements with sulfuric acid, for this we use the following formula:
w = n * Ar / M * 100%, where w is the mass fraction of the component in the compound, n is the number of atoms of the given component, Ar is the atomic mass of the given element, M is the molar mass of the entire compound.
Substituting the values ​​from the periodic table into the formula, we get:
w (H) = 2 * 1/98 * 100% = 2%.
w (S) = 1 * 32/98 * 100% = 33%.
w (O) = 4 * 16/98 * 100% = 65%.
We get that this is sulfuric acid.



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