Question #fc5c1

1 Answer
Nov 7, 2017

Answer:

#33# grams.

Explanation:

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"#