By definition
molarity = moles / Volume (L)
given
molarity = 0.097mol/L
volume = 25.00mL = 25.0x10-3 L
thus moles = molarity x volume
= 0.097mol/L x25.0x10-3 L
= 2.425x10-3 mol
The moles in 25 ml of sample = 2.425x10-3 mol
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