Solution (1)
Step 1: Calculate the molar mass of H₂O.
molar mass = (1 g/mol × 2) + (16 g/mol × 1)
molar mass = 18 g/mol
Step 2: Calculate the mass of H₂O.
[tex]\text{mass of H₂O = 2 mol H₂O} × \frac{\text{18 g H₂O}}{\text{1 mol H₂O}}[/tex]
[tex]\boxed{\text{mass of H₂O = 36 g}}[/tex]
Solution (2)
Step 1: Calculate the molar mass of NaCl.
molar mass = (22.99 g/mol × 2) + (35.45 g/mol × 1)
molar mass = 58.44 g/mol
Step 2: Calculate the mass of NaCl.
[tex]\text{mass of NaCl = 1 mol NaCl} × \frac{\text{58.44 g NaCl}}{\text{1 mol NaCl}}[/tex]
[tex]\boxed{\text{mass of NaCl = 58.44 g}}[/tex]
Solution (3)
Step 1: Calculate the molar mass of CH₃COOH.
molar mass = (12 g/mol × 2) + (1 g/mol × 4) + (16 g/mol × 2)
molar mass = 60 g/mol
Step 2: Calculate the mass of CH₃COOH.
[tex]\text{mass of CH₃COOH = 1.5 mol CH₃COOH} × \frac{\text{60 g CH₃COOH}}{\text{1 mol CH₃COOH}}[/tex]
[tex]\boxed{\text{mass of CH₃COOH = 90 g}}[/tex]
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