将30mL 5mol/L NaOH溶液加水稀释到500mL，稀释后溶液中NaOH的物质的量为(    )

  A．0.25mol                    B．2.5mol 

  C．0.15mol                    D．1.5mol

将30mL 5mol/L NaOH溶液加水稀释到500mL，稀释后溶液中NaOH的物质的量为(    )

  A．0.25mol                    B．2.5mol 

  C．0.15mol                    D．1.5mol

将30mL 5mol/L NaOH溶液加水稀释到500mL，稀释后溶液中NaOH的物质的量为(    )

  A．0.25mol                   B．2.5mol 

  C．0.15mol                   D．1.5mol

将30mL 5mol/L NaOH溶液加水稀释到500mL，稀释后溶液中NaOH的物质的量为(    )

将30mL 0.5mol/L NaOH 溶液加水稀释到500mL，稀释后溶液中NaOH的物质的量浓度为

1. A.
   0.3 mol/L
2. B.
   0.03 mol/L
3. C.
   0.05 mol/L
4. D.
   0.04 mol/L