How many moles are there in 34.5 g of sodium ? (Atomic mass of Na = 23 u)
Mass of sodium = 34.5g
We know that 1 mole of sodium weighs 23g.
Therefore, 34.5g of sodium = 34.5 / 23 = 1.5 moles
Hence, 34.5g of sodium contain 1.5 moles of sodium.
Concept: Molecular Mass
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