Which solution is the most concentrated?

A)2.0 mL of 10 M H2SO4, where H2SO4 has a molar mass of 98 g/mol
C)5.0 mL of 1.0 M PbSO4, where PbSO4 has a molar mass of 303 g/mol
B)2.0 mL of 10.5 M H2O2, where H2O2 has a molar mass of 34 g/mol
D)100 mL of 10 M NaCl, where NaCl has a molar mass of 58 g/mol

Question

Which solution is the most concentrated?

A)2.0 mL of 10 M H2SO4, where H2SO4 has a molar mass of 98 g/mol
C)5.0 mL of 1.0 M PbSO4, where PbSO4 has a molar mass of 303 g/mol
B)2.0 mL  of 10.5 M H2O2, where H2O2 has a molar mass of 34 g/mol
D)100 mL of 10 M NaCl, where NaCl has a molar mass of 58 g/mol

aaronq · Answer

in terms of molarity, the hydrogen peroxide solution has the highest concentration.