Sagot :
Solution:
Step 1: Calculate the number of moles of solute.
[tex]\text{molarity} = \frac{\text{moles of solute}}{\text{volume of solution (in L)}}[/tex]
moles of solute = molarity × volume of solution (in L)
moles of solute = 0.500 M × 0.02500 L
moles of solute = 0.0125 mol
Step 2: Calculate the molar mass of solute (NaOH).
molar mass of solute = (22.99 g/mol × 1) + (16.00 g/mol × 1) + (1.008 g/mol × 1)
molar mass of solute = 39.998 g/mol
Step 3: Calculate the mass of solute.
mass of solute = moles of solute × molar mass of solute
mass of solute = 0.0125 mol × 39.998 g/mol
[tex]\boxed{\text{mass of solute = 0.500 g}}[/tex]
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