Without using a calculator, arrange these samples in order
of increasing numbers of O atoms: 1 mol H2O, 1 mol CO2,
3 * 1023 molecules of O3.
Answer (1)
Answer:To arrange the samples in order of increasing number of oxygen atoms, let's calculate how many oxygen atoms are present in each sample:1. 1 mol H₂O (water):Each molecule of H₂O contains 1 oxygen atom.1 mole of H₂O contains molecules (Avogadro's number).Therefore, the number of oxygen atoms in 1 mol H₂O is atoms.2. 1 mol CO₂ (carbon dioxide):Each molecule of CO₂ contains 2 oxygen atoms.1 mole of CO₂ contains molecules.Therefore, the number of oxygen atoms in 1 mol CO₂ is atoms.3. molecules of O₃ (ozone):Each molecule of O₃ contains 3 oxygen atoms.Therefore, the number of oxygen atoms in molecules of O₃ is atoms.Arranging in increasing order:1 mol H₂O: oxygen atoms molecules of O₃: oxygen atoms1 mol CO₂: oxygen atomsThus, the correct order is:1 mol H₂O < molecules of O₃ < 1 mol CO₂.
