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If the mass of a sample of Na(2)SO(4) is...

If the mass of a sample of `Na_(2)SO_(4)` is 7.1g , then how many molecules of `Na_(2)SO_(4)` must be present in the sample ?

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To find the number of molecules of \( \text{Na}_2\text{SO}_4 \) in a 7.1 g sample, we can follow these steps: ### Step 1: Calculate the molar mass of \( \text{Na}_2\text{SO}_4 \) The molar mass of \( \text{Na}_2\text{SO}_4 \) can be calculated by summing the atomic masses of its constituent elements: - Sodium (Na): 22.99 g/mol (2 Na atoms) - Sulfur (S): 32.07 g/mol (1 S atom) - Oxygen (O): 16.00 g/mol (4 O atoms) ...
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