Solution (a)
Step 1: Calculate the molar mass of H₂O.
molar mass = (1.008 g/mol × 2) + (16.00 g/mol × 1)
molar mass = 18.016 g/mol
Step 2: Calculate the number of moles of H₂O.
[tex]\text{moles of H₂O = 1000 g H₂O} × \frac{\text{1 mol H₂O}}{\text{18.016 g H₂O}}[/tex]
[tex]\boxed{\text{moles of H₂O = 55.51 mol}}[/tex]
Solution (b)
Step 1: Calculate the molar mass of NaCl.
molar mass = (22.99 g/mol × 1) + (35.45 g/mol × 1)
molar mass = 58.44 g/mol
Step 2: Calculate the number of moles of NaCl.
[tex]\text{moles of NaCl = 50 g NaCl} × \frac{\text{1 mol NaCl}}{\text{58.44 g NaCl}}[/tex]
[tex]\boxed{\text{moles of NaCl = 0.856 mol}}[/tex]
Solution (c)
Step 1: Calculate the molar mass of C₆H₁₂O₆.
molar mass = (12.01 g/mol × 6) + (1.008 g/mol × 12) × (16.00 g/mol × 6)
molar mass = 180.16 g/mol
Step 2: Calculate the number of moles of C₆H₁₂O₆.
[tex]\text{moles of C₆H₁₂O₆ = 100 g C₆H₁₂O₆} × \frac{\text{1 mol C₆H₁₂O₆}}{\text{180.16 g C₆H₁₂O₆}}[/tex]
[tex]\boxed{\text{moles of C₆H₁₂O₆ = 0.555 mol}}[/tex]
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