How many moles of water are present in 36.0 g of H₂O? (Molar mass of H₂O = 18.0 g/mol)
A0.500 mol
B1.00 mol
C2.00 mol
D18.0 mol
Explanation
📌 Moles = mass ÷ molar mass = 36.0 g ÷ 18.0 g/mol = 2.00 mol. Repeat after me: grams → moles is ALWAYS division by molar mass. Multiplying produces an unreasonably huge answer (option D shows that error).
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