How many mL of 2M HCL will completely titrate (or neutralize) a 20mL sample of 2M NaOH?

4.00 grams of an unknown monoprotic acid is titrated with 0.75 M NaOH. It takes 88.81 mL of NaOH to completely neutralize the acid. What is the molecular weight of the acid? How many mL of concentrated (18 M) H_2SO_4 are needed to prepare 150 mL of a 3 M H_2SO_4 solution? A 70% mixture of ethanol and water (mass %; 70% ethanol, 30% water) has a density of 0.868 g/mL. How many grams of ethanol are present in a 28.0 mL sample? How many mL of 2.5 M NaOH are needed to completely neutralize 9.54 g of benzoic acid (MW = 122.12 g/mol)?