Given:
#"volume = 100 mL = 0.100 L"#
#"concentration = 2.5 mol/L"#
The volume and concentration of a substance are related to the number of moles by the equation
#n = cV#
where #n# is the number of moles, #c# is the concentration, and #V# is the volume of the substance.
The number of moles of a substance is related to its mass by the equation
#m = nM#
where #m# is the mass, #n# is the number of moles, and #M# is the molar mass of the substance.
Find the number of moles of solution using the first equation:
#n = cV#
#n = (2.5 "mol"/"L")("0.100 L")#
#n = "0.25 mol"#
Find the mass using the second equation:
#m = nM#
#m = ("0.25 mol")(132.14 "g"/"mol")#
#m = "33 g"#
