what is the total number of atoms in each sample: a. 0.431 mol of Li b. 2.783 of methanol (CH3OH)
Answer (1)
Use Avogadro’s number:1 mol = 6.022 × 10²³ particlesa. Li atoms: 0.431 mol × (6.022 × 10²³ atoms/mol) = 2.595 × 10²³ atoms of Lib. CH₃OH: Each molecule has 6 atoms (C=1, H=4, O=1). Total atoms = 2.783 mol × (6.022 × 10²³ molecules/mol) × 6 atoms = 2.783 × 6.022 × 6 × 10²³ = 1.005 × 10²⁵ atoms
