Answer:-
To find the number of molecules in 450 grams of Na?SO? (sodium sulfate), follow these steps: Find the molar mass of Na?SO?: Na: 23 × 2 = 46 S: 32 × 1 = 32 O: 16 × 4 = 64 Total = 142 g/mol Calculate moles: Moles = 450 g ÷ 142 g/mol = 3.17 moles Find the number of molecules: Multiply by Avogadro’s number (6.022 × 10²³): 3.17 × 6.022 × 10²³ = 1.91 × 10²? molecules.
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