Estimate the number of electrons contained in 100 g of water. What is the total negative charge of these electrons?

Step-by-step solution

Molecular mass of water ( H₂O ) is 18 g/mol . Number of moles in 100 g of water is 100 18 mol . Number of molecules in 100 g of water is 100 18 6.022 10²³ 3.345 10²⁴ . Each molecule of water ( H₂O ) contains 2 + 8 = 10 electrons. Total number of electrons is 10 3.345 10²⁴ = 3.345 10²⁵ 3.35 10²⁵ . The magnitude of charge on one electron is 1.6 10⁻¹⁹ C . Total negative charge is 3.345 10²⁵ 1.6 10⁻¹⁹ 5.35 10^6 C .