50.0 mL of rhubarb juice are titrated with 0.1000 M NaOH and 23.5mL of this NaOH solution are necessary for neutralization. Assuming the acidity of the juice is due to oxalic acid (a di-protic acid), H2C2O4 (90.04g/mol), find out the weight of oxalic acid in grams per liter of juice.