Answer:
3.34 × 1025 molecules
Water molecules
Step-by-step explanation:
Water (H2O) has a molecular weight of 18 grams (g), and 1 liter (L) of water weighs 1,000 g. A molecular weight often is simply referred to as a mole. Thus, 1 L of water contains 55.6 moles of water. Multiplying by Avogadro's number we find that 55.6 moles of water contains 3.34 × 1025 molecules.