What amount of substance of atoms of each chemical element contains 1 mole of substances, the formulas of which are: SO2

What amount of substance of atoms of each chemical element contains 1 mole of substances, the formulas of which are: SO2, Н3РO4, Fe2O3, Ca (OH) 2?

1 mol of sulfur (IV) oxide SO2 contains 1 mol of sulfur atoms S and 2 mol of oxygen atoms O:
γ (S) = 1 • γ (SO2) = 1 • 1 mol = 1 mol;
γ (О) = 2 • γ (SO2) = 2 • 1 mol = 2 mol.
1 mol of phosphoric acid H3PO4 contains 3 mol of hydrogen atoms H, 1 mol of phosphorus P atoms and 4 mol of oxygen atoms O:
γ (Н) = 1 • γ (Н3РO4) = 3 • 1 mol = 3 mol;
γ (P) = 1 • γ (Н3РO4) = 1 • 1 mol = 1 mol;
γ (О) = 4 • γ (Н3РO4) = 4 • 1 mol = 4 mol.
1 mol of iron (III) oxide Fe2O3 contains 2 mol of formula units of iron Fe, 3 mol of formula units of hydrogen H:
γ (Fe) = 2 • γ (Fe2O3) = 2 • 1 mol = 2 mol;
γ (О) = 3 • γ (Fe2O3) = 3 • 1 mol = 3 mol.
1 mol of calcium hydroxide Ca (OH) 2 contains 1 mol of formula units of calcium Ca, 2 mol of formula units of oxygen O and 2 mol of formula units of hydrogen H:
γ (Ca) = 1 • γ (Ca (OH) 2) = 1 • 1 mol = 1 mol;
γ (Ca) = 2 • γ (Ca (OH) 2) = 2 • 1 mol = 2 mol;
γ (О) = 3 • γ (Ca (OH) 2) = 3 • 1 mol = 3 mol.

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