Final answer:
To calculate the mass in grams of a single molecule of water, use its molar mass (18.015 g/mol) and divide by Avogadro's number (6.022 × 10²³ molecules/mol).
Step-by-step explanation:
The mass in grams of a single molecule of water (H₂O) can be determined using the concept of molar mass. The molar mass of water is the sum of the atomic masses of its constituent atoms, which is 18.015 g/mol. To find the mass of one molecule, we can use Avogadro's number, which is 6.022 × 10²³ molecules per mole. Therefore, the mass of a single molecule of water is obtained by dividing the mass of one mole of water by Avogadro's number:
molecular mass (H₂O) = × 18.015 g/mol ÷ 6.022 × 10²³ molecules/mol
The calculation would give us the mass of a single molecule of water in grams, a very small number due to the miniscule mass of individual molecules.
To calculate the mass in grams of a single molecule of water (H₂O), we need to use the molar mass of water as a conversion factor. The molar mass of water is 18.015 g/mol, which means that one mole of water weighs 18.015 grams. Since one mole of water contains Avogadro's number of molecules (6.022 × 10²³ molecules), we can use the molar mass to calculate the mass of a single molecule:
(18.015 g/mol) ÷ (6.022 × 10²³ molecules/mol) = 2.99 × 10⁻²³ grams/molecule