Calculate the mass percentage of oxygen in the sugar C12 H22 O11.

Answer: w (O) = 51.46%.
Explanation of the solution to the problem: to find the mass fraction of the components in the compound, you must use the following formula:
w = n * Ar / M * 100%, where w is the mass fraction of the component in the compound (in this case, the mass fraction of oxygen in the sugar), 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 of elements of D.I.Mendeleev into the formula, we obtain:
w (O) = 11 * 16/342 * 100% = 51.46%.