Final answer:
To find the ratio of elements in a mole of H2O2 and H2O, we look at the empirical formulas of the compounds: H2O has a 2:1 hydrogen to oxygen ratio and H2O2 has a 1:1 ratio, with no further calculations required for these ratios.
Step-by-step explanation:
To calculate the ratio of the elements in a mole of H2O2 and H2O, we first need to understand the empirical formulas and stoichiometry of these compounds. For water (H2O), the empirical formula indicates that it contains 2 moles of hydrogen (H) and 1 mole of oxygen (O). The molar mass of water (H2O) is 18.015 g/mol (2x1.008 g/mol for H and 15.999 g/mol for O).
In hydrogen peroxide (H2O2), the compound is composed of 2 moles of hydrogen (H) and 2 moles of oxygen (O). The molar mass of hydrogen peroxide (H2O2) is 34.014 g/mol (2x1.008 g/mol for H and 2x16.00 g/mol for O).
To compare the ratios, simply state the mole ratio of hydrogen to oxygen in each compound: H2O has a 2:1 ratio and H2O2 has a 1:1 ratio. No calculations are necessary for the ratios because the empirical formulas give us the necessary information directly. However, understanding mole conversions is vital if we need to calculate the actual quantities of each element when given masses or moles of the compounds.